https://www.mongodb.com/docs/manual/tutorial/configure-windows-netsh-firewall/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Configure Windows
<code class="leafygreen-ui-1l06pbn">
netsh
</code>
Firewall for Self-Managed Deployments
<a class="headerlink leafygreen-ui-1kepx47" href="#configure-windows-netsh-firewall-for-self-managed-deployments" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="configure-windows-netsh-firewall-for-self-managed-deployments">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#overview" target="_self">
<span>
Overview
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#patterns" target="_self">
<span>
Patterns
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#manage-windows-firewall-configurations" target="_self">
<span>
Manage Windows Firewall Configurations
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
On Windows Server systems, the
<code class="leafygreen-ui-1l06pbn">
netsh
</code>
program provides
methods for managing the
<span class="guilabel css-h15tq0">
Windows Firewall
</span>
. These firewall rules make it possible
for administrators to control what hosts can connect to the system,
and limit risk exposure by limiting the hosts that can connect to a
system.
</p>
<p class="leafygreen-ui-1kp3ins">
This document outlines basic
<span class="guilabel css-h15tq0">
Windows Firewall
</span>
configurations.
Use these approaches as a starting point for your
larger networking organization.
For a detailed over view of security
practices and risk management for MongoDB, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/security/">
Security
<!-- -->
.
</a>
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://technet.microsoft.com/en-us/network/bb545423.aspx" rel="noopener noreferrer">
<span>
Windows Firewall
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
documentation from Microsoft.
</p>
</div>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Overview
<a class="headerlink leafygreen-ui-1kepx47" href="#overview" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="overview">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<span class="guilabel css-h15tq0">
Windows Firewall
</span>
processes rules in an ordered determined
by rule type, and parsed in the following order:
</p>
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
Windows Service Hardening
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
Connection security rules
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
Authenticated Bypass Rules
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
Block Rules
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
Allow Rules
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
Default Rules
</code>
</p>
</li>
</ol>
<p class="leafygreen-ui-1kp3ins">
By default, the policy in
<span class="guilabel css-h15tq0">
Windows Firewall
</span>
allows all outbound connections
and blocks all incoming connections.
</p>
<p class="leafygreen-ui-1kp3ins">
Given the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/default-mongodb-port/#std-label-default-mongodb-port">
default ports
</a>
of all
MongoDB processes, you must configure networking rules that permit
<em>
only
</em>
required communication between your application and the appropriate
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod.exe/#mongodb-binary-bin.mongod.exe">
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos.exe/#mongodb-binary-bin.mongos.exe">
<code class="leafygreen-ui-1l06pbn">
mongos.exe
</code>
</a>
instances.
</p>
<p class="leafygreen-ui-1kp3ins">
The configuration changes outlined in this document will create rules
which explicitly allow traffic from specific addresses and on specific
ports, using a default policy that drops all traffic that is not
explicitly allowed.
</p>
<p class="leafygreen-ui-1kp3ins">
You can configure the
<span class="guilabel css-h15tq0">
Windows Firewall
</span>
with using the
<code class="leafygreen-ui-1l06pbn">
netsh
</code>
command line
tool or through a windows application. On Windows Server 2008 this
application is
<span class="guilabel css-h15tq0">
Windows Firewall With Advanced Security
</span>
in
<span class="guilabel css-h15tq0">
Administrative Tools
</span>
.
On previous versions of Windows Server, access the
<span class="guilabel css-h15tq0">
Windows Firewall
</span>
application in the
<span class="guilabel css-h15tq0">
System and Security
</span>
control panel.
</p>
<p class="leafygreen-ui-1kp3ins">
The procedures in this document use the
<code class="leafygreen-ui-1l06pbn">
netsh
</code>
command line tool.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Patterns
<a class="headerlink leafygreen-ui-1kepx47" href="#patterns" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="patterns">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This section contains a number of patterns and examples for
configuring
<span class="guilabel css-h15tq0">
Windows Firewall
</span>
for use with MongoDB deployments.
If you have configured different ports using the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-net.port">
<code class="leafygreen-ui-1l06pbn">
port
</code>
</a>
configuration
setting, you will need to modify the rules accordingly.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-wfirewall-basic-rule-set">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Traffic to and from
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
Instances
<a class="headerlink leafygreen-ui-1kepx47" href="#traffic-to-and-from-mongod.exe-instances" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="traffic-to-and-from-mongod.exe-instances">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
This pattern is applicable to all
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod.exe/#mongodb-binary-bin.mongod.exe">
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
</a>
instances running
as standalone instances or as part of a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-replica-set">
replica set
</a>
.
The goal of this pattern is to explicitly allow traffic to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod.exe/#mongodb-binary-bin.mongod.exe">
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
</a>
instance from the application server.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"netsh advfirewall firewall add rule name=\"Open mongod port 27017\" dir=in action=allow protocol=TCP localport=27017"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall firewall add rule name="Open mongod port 27017" dir=in action=allow protocol=TCP localport=27017</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
This rule allows all incoming traffic to port
<code class="leafygreen-ui-1l06pbn">
27017
</code>
, which
allows the application server to connect to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod.exe/#mongodb-binary-bin.mongod.exe">
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
</a>
instance.
</p>
<p class="leafygreen-ui-1kp3ins">
<span class="guilabel css-h15tq0">
Windows Firewall
</span>
also allows enabling network access for
an entire application rather than to a specific port, as in the
following example:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"netsh advfirewall firewall add rule name=\"Allowing mongod\" dir=in action=allow program=\" C:\\Program Files\\MongoDB\\Server\\3.4\\bin\\mongod.exe\""}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall firewall add rule name="Allowing mongod" dir=in action=allow program=" C:\Program Files\MongoDB\Server\3.4\bin\mongod.exe"</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
You can allow all access for a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos.exe/#mongodb-binary-bin.mongos.exe">
<code class="leafygreen-ui-1l06pbn">
mongos.exe
</code>
</a>
server, with the
following invocation:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"netsh advfirewall firewall add rule name=\"Allowing mongos\" dir=in action=allow program=\" C:\\Program Files\\MongoDB\\Server\\3.4\\bin\\mongos.exe\""}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall firewall add rule name="Allowing mongos" dir=in action=allow program=" C:\Program Files\MongoDB\Server\3.4\bin\mongos.exe"</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Traffic to and from
<code class="leafygreen-ui-1l06pbn">
mongos.exe
</code>
Instances
<a class="headerlink leafygreen-ui-1kepx47" href="#traffic-to-and-from-mongos.exe-instances" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="traffic-to-and-from-mongos.exe-instances">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos.exe/#mongodb-binary-bin.mongos.exe">
<code class="leafygreen-ui-1l06pbn">
mongos.exe
</code>
</a>
instances provide query routing for
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-sharded-cluster">
sharded clusters
</a>
. Clients connect to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos.exe/#mongodb-binary-bin.mongos.exe">
<code class="leafygreen-ui-1l06pbn">
mongos.exe
</code>
</a>
instances, which behave from the client's perspective as
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod.exe/#mongodb-binary-bin.mongod.exe">
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
</a>
instances. In turn, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos.exe/#mongodb-binary-bin.mongos.exe">
<code class="leafygreen-ui-1l06pbn">
mongos.exe
</code>
</a>
connects to all
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod.exe/#mongodb-binary-bin.mongod.exe">
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
</a>
instances that are components of
the sharded cluster.
</p>
<p class="leafygreen-ui-1kp3ins">
Use the same
<span class="guilabel css-h15tq0">
Windows Firewall
</span>
command to allow traffic to
and from these instances as you would from the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod.exe/#mongodb-binary-bin.mongod.exe">
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
</a>
instances that are members of the replica set.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"netsh advfirewall firewall add rule name=\"Open mongod shard port 27018\" dir=in action=allow protocol=TCP localport=27018"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall firewall add rule name="Open mongod shard port 27018" dir=in action=allow protocol=TCP localport=27018</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Traffic to and from a MongoDB Config Server
<a class="headerlink leafygreen-ui-1kepx47" href="#traffic-to-and-from-a-mongodb-config-server" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="traffic-to-and-from-a-mongodb-config-server">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Configuration servers, host the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-config-database">
config database
</a>
that stores metadata
for sharded clusters. Each production cluster has three configuration
servers, initiated using the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--configsvr">
<code class="leafygreen-ui-1l06pbn">
mongod --configsvr
</code>
</a>
option.
<a class="footnote-reference header-buffer" href="#footnote-config-option" id="ref-config-option-id1">
[
<!-- -->
1
<!-- -->
]
</a>
Configuration servers listen for connections on port
<code class="leafygreen-ui-1l06pbn">
27019
</code>
. As a result, add the following
<span class="guilabel css-h15tq0">
Windows Firewall
</span>
rules to the
config server to allow incoming and outgoing connection on port
<code class="leafygreen-ui-1l06pbn">
27019
</code>
, for connection to the other config servers.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"netsh advfirewall firewall add rule name=\"Open mongod config svr port 27019\" dir=in action=allow protocol=TCP localport=27019"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall firewall add rule name="Open mongod config svr port 27019" dir=in action=allow protocol=TCP localport=27019</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Additionally, config servers need to allow incoming connections from
all of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos.exe/#mongodb-binary-bin.mongos.exe">
<code class="leafygreen-ui-1l06pbn">
mongos.exe
</code>
</a>
instances in the cluster
<em>
and
</em>
all
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod.exe/#mongodb-binary-bin.mongod.exe">
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
</a>
instances in the cluster. Add rules that
resemble the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"netsh advfirewall firewall add rule name=\"Open mongod config svr inbound\" dir=in action=allow protocol=TCP remoteip=<ip-address> localport=27019"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall firewall add rule name="Open mongod config svr inbound" dir=in action=allow protocol=TCP remoteip=<ip-address> localport=27019</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Replace
<code class="leafygreen-ui-1l06pbn">
<ip-address>
</code>
with the addresses of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos.exe/#mongodb-binary-bin.mongos.exe">
<code class="leafygreen-ui-1l06pbn">
mongos.exe
</code>
</a>
instances and the shard
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod.exe/#mongodb-binary-bin.mongod.exe">
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
</a>
instances.
</p>
<table class="header-buffer leafygreen-ui-rbqgrl" frame="void" id="footnote-config-option" rules="none">
<colgroup>
<col/>
</colgroup>
<tbody valign="top">
<tr>
<td class="leafygreen-ui-17r2xs0">
[
<a href="#ref-config-option-id1">
1
</a>
]
</td>
<td class="leafygreen-ui-17r2xs0">
<!-- -->
You also can run a config server by using the
<code class="leafygreen-ui-1l06pbn">
configsvr
</code>
value for the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-sharding.clusterRole">
<code class="leafygreen-ui-1l06pbn">
clusterRole
</code>
</a>
setting in a
configuration file.
</td>
</tr>
</tbody>
</table>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Traffic to and from a MongoDB Shard Server
<a class="headerlink leafygreen-ui-1kepx47" href="#traffic-to-and-from-a-mongodb-shard-server" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="traffic-to-and-from-a-mongodb-shard-server">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
For shard servers, running as
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--shardsvr">
<code class="leafygreen-ui-1l06pbn">
mongod --shardsvr
</code>
</a>
<a class="footnote-reference header-buffer" href="#footnote-shard-option" id="ref-shard-option-id2">
[
<!-- -->
2
<!-- -->
]
</a>
Because the default port number is
<code class="leafygreen-ui-1l06pbn">
27018
</code>
when running
with the
<code class="leafygreen-ui-1l06pbn">
shardsvr
</code>
value for the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-sharding.clusterRole">
<code class="leafygreen-ui-1l06pbn">
clusterRole
</code>
</a>
setting,
you must configure the following
<span class="guilabel css-h15tq0">
Windows Firewall
</span>
rules to allow
traffic to and from each shard:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"netsh advfirewall firewall add rule name=\"Open mongod shardsvr inbound\" dir=in action=allow protocol=TCP remoteip=<ip-address> localport=27018\nnetsh advfirewall firewall add rule name=\"Open mongod shardsvr outbound\" dir=out action=allow protocol=TCP remoteip=<ip-address> localport=27018"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall firewall add rule name="Open mongod shardsvr inbound" dir=in action=allow protocol=TCP remoteip=<ip-address> localport=27018</td></tr><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall firewall add rule name="Open mongod shardsvr outbound" dir=out action=allow protocol=TCP remoteip=<ip-address> localport=27018</td></tr></tbody></table></code></pre>
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Replace the
<code class="leafygreen-ui-1l06pbn">
<ip-address>
</code>
specification with the IP address of all
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod.exe/#mongodb-binary-bin.mongod.exe">
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
</a>
instances. This allows you to permit incoming
and outgoing traffic between all shards including constituent replica
set members to:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
all
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod.exe/#mongodb-binary-bin.mongod.exe">
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
</a>
instances in the shard's replica sets.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
all
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod.exe/#mongodb-binary-bin.mongod.exe">
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
</a>
instances in other shards.
<a class="footnote-reference header-buffer" href="#footnote-migrations" id="ref-migrations-id3">
[
<!-- -->
3
<!-- -->
]
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Furthermore, shards need to be able make outgoing connections to:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
all
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos.exe/#mongodb-binary-bin.mongos.exe">
<code class="leafygreen-ui-1l06pbn">
mongos.exe
</code>
</a>
instances.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
all
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod.exe/#mongodb-binary-bin.mongod.exe">
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
</a>
instances in the config servers.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Create a rule that resembles the following, and replace the
<code class="leafygreen-ui-1l06pbn">
<ip-address>
</code>
with the address of the config servers and the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos.exe/#mongodb-binary-bin.mongos.exe">
<code class="leafygreen-ui-1l06pbn">
mongos.exe
</code>
</a>
instances:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"netsh advfirewall firewall add rule name=\"Open mongod config svr outbound\" dir=out action=allow protocol=TCP remoteip=<ip-address> localport=27018"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall firewall add rule name="Open mongod config svr outbound" dir=out action=allow protocol=TCP remoteip=<ip-address> localport=27018</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</svg>
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</button>
</div>
</div>
</div>
</div>
<table class="header-buffer leafygreen-ui-rbqgrl" frame="void" id="footnote-shard-option" rules="none">
<colgroup>
<col/>
</colgroup>
<tbody valign="top">
<tr>
<td class="leafygreen-ui-17r2xs0">
[
<a href="#ref-shard-option-id2">
2
</a>
]
</td>
<td class="leafygreen-ui-17r2xs0">
<!-- -->
You can also specify the shard server option with the
<code class="leafygreen-ui-1l06pbn">
shardsvr
</code>
value
for the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-sharding.clusterRole">
<code class="leafygreen-ui-1l06pbn">
clusterRole
</code>
</a>
setting in the configuration file. Shard
members are also often conventional replica sets using the default
port.
</td>
</tr>
</tbody>
</table>
<table class="header-buffer leafygreen-ui-rbqgrl" frame="void" id="footnote-migrations" rules="none">
<colgroup>
<col/>
</colgroup>
<tbody valign="top">
<tr>
<td class="leafygreen-ui-17r2xs0">
[
<a href="#ref-migrations-id3">
3
</a>
]
</td>
<td class="leafygreen-ui-17r2xs0">
<!-- -->
All shards in a cluster need to be able to
communicate with all other shards to facilitate
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-chunk">
chunk
</a>
and
balancing operations.
</td>
</tr>
</tbody>
</table>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Provide Access For Monitoring Systems
<a class="headerlink leafygreen-ui-1kepx47" href="#provide-access-for-monitoring-systems" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="provide-access-for-monitoring-systems">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/database-tools/mongostat/#mongodb-binary-bin.mongostat" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongostat
</code>
</span>
</a>
diagnostic tool, when running with the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/database-tools/mongostat/#std-option-mongostat.--discover" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
--discover
</code>
</span>
</a>
needs to be able to reach
all components of a cluster, including the config servers, the shard
servers, and the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos.exe/#mongodb-binary-bin.mongos.exe">
<code class="leafygreen-ui-1l06pbn">
mongos.exe
</code>
</a>
instances.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Manage Windows Firewall Configurations
<a class="headerlink leafygreen-ui-1kepx47" href="#manage-windows-firewall-configurations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="manage-windows-firewall-configurations">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This section contains a number of basic operations for managing and
using
<code class="leafygreen-ui-1l06pbn">
netsh
</code>
. While you can use the GUI front ends to manage the
<span class="guilabel css-h15tq0">
Windows Firewall
</span>
, all core functionality is accessible is
accessible from
<code class="leafygreen-ui-1l06pbn">
netsh
</code>
.
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Delete Windows Firewall Rules for Default MongoDB Ports
<a class="headerlink leafygreen-ui-1kepx47" href="#delete-windows-firewall-rules-for-default-mongodb-ports" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="delete-windows-firewall-rules-for-default-mongodb-ports">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To delete the firewall rule allowing
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod.exe/#mongodb-binary-bin.mongod.exe">
<code class="leafygreen-ui-1l06pbn">
mongod.exe
</code>
</a>
traffic:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"netsh advfirewall firewall delete rule name=\"Open mongod port 27017\" protocol=tcp localport=27017\n\nnetsh advfirewall firewall delete rule name=\"Open mongod shard port 27018\" protocol=tcp localport=27018"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall firewall delete rule name="Open mongod port 27017" protocol=tcp localport=27017</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall firewall delete rule name="Open mongod shard port 27018" protocol=tcp localport=27018</td></tr></tbody></table></code></pre>
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</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
List All Windows Firewall Rules
<a class="headerlink leafygreen-ui-1kepx47" href="#list-all-windows-firewall-rules" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="list-all-windows-firewall-rules">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To return a list of all
<span class="guilabel css-h15tq0">
Windows Firewall
</span>
rules:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"netsh advfirewall firewall show rule name=all"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall firewall show rule name=all</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Reset Windows Firewall
<a class="headerlink leafygreen-ui-1kepx47" href="#reset-windows-firewall" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="reset-windows-firewall">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To reset the
<span class="guilabel css-h15tq0">
Windows Firewall
</span>
rules:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"netsh advfirewall reset"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall reset</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Backup and Restore Windows Firewall Rules
<a class="headerlink leafygreen-ui-1kepx47" href="#backup-and-restore-windows-firewall-rules" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="backup-and-restore-windows-firewall-rules">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To simplify administration of larger systems, you can export or import
Windows Firewall rules.
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
To export all Windows Firewall rules, run the following command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"netsh advfirewall export \"C:\\temp\\MongoDBfw.wfw\""}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall export "C:\temp\MongoDBfw.wfw"</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Replace
<code class="leafygreen-ui-1l06pbn">
"C:\temp\MongoDBfw.wfw"
</code>
with a path of your choosing.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
To import Windows Firewall rules, run the following command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"netsh advfirewall import \"C:\\temp\\MongoDBfw.wfw\""}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">netsh advfirewall import "C:\temp\MongoDBfw.wfw"</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Replace
<code class="leafygreen-ui-1l06pbn">
"C:\temp\MongoDBfw.wfw"
</code>
with the path to the file that
contains your Windows Firewall rules.
</p>
</li>
</ul>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/sh.abortReshardCollection/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
sh.abortReshardCollection()
<a class="headerlink leafygreen-ui-1kepx47" href="#sh.abortreshardcollection--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sh.abortreshardcollection--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
sh.abortReshardCollection(namespace)
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-sh.abortReshardCollection" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-sh.abortReshardCollection">
</div>
</a>
</dt>
<dd>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
During a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-reshard-a-collection/#std-label-sharding-resharding">
resharding operation
</a>
, you can
abort the operation with the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-sh.abortReshardCollection" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
sh.abortReshardCollection()
</code>
</span>
</a>
method.
</p>
<p class="leafygreen-ui-1kp3ins">
You can abort a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-reshard-a-collection/#std-label-sharding-resharding">
resharding operation
</a>
at
any point until the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.reshardCollection/#std-label-resharding-commit-phase-method">
commit phase
</a>
. If the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-reshard-a-collection/#std-label-sharding-resharding">
resharding operation
</a>
has reached the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.reshardCollection/#std-label-resharding-commit-phase-method">
commit phase
</a>
before you run
the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-sh.abortReshardCollection" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
sh.abortReshardCollection()
</code>
</span>
</a>
method, the method returns
an error.
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
mongosh Method
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This page documents a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
method. This is
<em>
not
</em>
the documentation for database commands or language-specific drivers,
such as Node.js.
</p>
<p class="leafygreen-ui-1kp3ins">
For the database command, see the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/abortReshardCollection/#mongodb-dbcommand-dbcmd.abortReshardCollection">
<code class="leafygreen-ui-1l06pbn">
abortReshardCollection
</code>
</a>
command
<!-- -->
.
</p>
<p class="leafygreen-ui-1kp3ins">
For MongoDB API drivers, refer to the language-specific
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
MongoDB driver documentation
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This method is available in deployments hosted in the following environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This command is supported in all MongoDB Atlas clusters.
For information on Atlas support for all commands, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/" target="_self">
<span>
Unsupported Commands
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-sh.abortReshardCollection" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
sh.abortReshardCollection()
</code>
</span>
</a>
method has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.abortReshardCollection( <namespace> )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">abortReshardCollection</span>( <<!-- -->namespace<!-- -->> <!-- -->)</td></tr></tbody></table></code></pre>
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</div>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Parameter
<a class="headerlink leafygreen-ui-1kepx47" href="#parameter" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="parameter">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-sh.abortReshardCollection" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
sh.abortReshardCollection()
</code>
</span>
</a>
method takes the following
parameter:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:60%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Parameter
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-method-abortReshardCollection-namespace" target="_self">
<span>
namespace
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
String
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-method-abortReshardCollection-namespace">
</span>
<p class="leafygreen-ui-1kp3ins">
The name of the collection to shard in the form
<code class="leafygreen-ui-1l06pbn">
"<database>.<collection>"
</code>
.
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
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<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Abort a Resharding Operation
<a class="headerlink leafygreen-ui-1kepx47" href="#abort-a-resharding-operation" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="abort-a-resharding-operation">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following example aborts a running
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-reshard-a-collection/#std-label-sharding-resharding">
resharding operation
</a>
on the
<code class="leafygreen-ui-1l06pbn">
sales.orders
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.abortReshardCollection(\"sales.orders\")","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">abortReshardCollection</span>(<span class="lg-highlight-string">"sales.orders"</span>)</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-reshard-a-collection/#std-label-sharding-resharding">
Reshard a Collection
</a>
</p>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/schema-validation/specify-json-schema/specify-allowed-field-values/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Specify Allowed Field Values
<a class="headerlink leafygreen-ui-1kepx47" href="#specify-allowed-field-values" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="specify-allowed-field-values">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#context" target="_self">
<span>
Context
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#steps" target="_self">
<span>
Steps
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
When you create a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/schema-validation/specify-json-schema/#std-label-schema-validation-json">
JSON Schema
</a>
, you can
specify what values are allowed in a particular field. Use this
functionality to ensure that your field values belong to an expected set
of values, such as a list of countries. Similarly, you can use this
functionality to prevent human error, such as typos, when inserting data
into a collection.
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Context
<a class="headerlink leafygreen-ui-1kepx47" href="#context" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="context">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To specify a list of allowed values, use the
<code class="leafygreen-ui-1l06pbn">
enum
</code>
keyword in your
JSON schema. The
<code class="leafygreen-ui-1l06pbn">
enum
</code>
keyword means "enumerate", and is used to list
possible values of a field.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Steps
<a class="headerlink leafygreen-ui-1kepx47" href="#steps" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="steps">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Consider a clothing company that only ships products to France, the
United Kingdom, and the United States. In the validator, you can list
the allowed country values and reject documents that specify a different
country.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"HowTo","steps":[{"@type":"HowToStep","text":"Create a shipping collection and use the $jsonSchema\noperator to set schema validation rules:The enum field in the country object only allows documents\nwhere the country field is either France, United\nKingdom, or United States.","name":"Create a collection with validation containing enum."},{"@type":"HowToStep","text":"The following insert operation fails because country is\nGermany, which isn't in the list of allowed values.The operation returns this error:","name":"Confirm that the validation prevents invalid documents."},{"@type":"HowToStep","text":"The insert succeeds after you change the country field to one\nof the allowed values:","name":"Insert a valid document."},{"@type":"HowToStep","text":"To confirm that the document was successfully inserted, query the\nshipping collection:MongoDB returns the document:","name":"Query for the valid document."}],"name":"Steps","image":"https://webimages.mongodb.com/_com_assets/cms/kuyj2focmkbxv7gh3-stacked_default_slate_blue.svg?auto=format%252Ccompress"}
</script>
<div class="css-qum8nr eccljxs0">
<div class="css-vq8pj5 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-18jxsvu e1ckbxcu2">
1
</div>
</div>
<div class="css-clrhqf">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Create a collection with validation containing
<code class="leafygreen-ui-1l06pbn">
enum
</code>
.
<a class="headerlink leafygreen-ui-1kepx47" href="#create-a-collection-with-validation-containing-enum." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="create-a-collection-with-validation-containing-enum.">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Create a
<code class="leafygreen-ui-1l06pbn">
shipping
</code>
collection and use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/jsonSchema/#mongodb-query-op.-jsonSchema">
<code class="leafygreen-ui-1l06pbn">
$jsonSchema
</code>
</a>
operator to set schema validation rules:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.createCollection(\"shipping\", {\n validator: {\n $jsonSchema: {\n bsonType: \"object\",\n title: \"Shipping Country Validation\",\n properties: {\n country: {\n enum: [ \"France\", \"United Kingdom\", \"United States\" ],\n description: \"Must be either France, United Kingdom, or United States\"\n }\n }\n }\n }\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">createCollection</span>(<span class="lg-highlight-string">"shipping"</span>, <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">validator</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$jsonSchema</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">bsonType</span>: <span class="lg-highlight-string">"object"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">title</span>: <span class="lg-highlight-string">"Shipping Country Validation"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">properties</span>: <!-- -->{</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">country</span>: <!-- -->{</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">enum</span>: <!-- -->[ <span class="lg-highlight-string">"France"</span>, <span class="lg-highlight-string">"United Kingdom"</span>, <span class="lg-highlight-string">"United States"</span> ]<!-- -->,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">description</span>: <span class="lg-highlight-string">"Must be either France, United Kingdom, or United States"</span></td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
enum
</code>
field in the
<code class="leafygreen-ui-1l06pbn">
country
</code>
object only allows documents
where the
<code class="leafygreen-ui-1l06pbn">
country
</code>
field is either
<code class="leafygreen-ui-1l06pbn">
France
</code>
,
<code class="leafygreen-ui-1l06pbn">
United
Kingdom
</code>
, or
<code class="leafygreen-ui-1l06pbn">
United States
</code>
.
</p>
</section>
</div>
</div>
<div class="css-vq8pj5 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-18jxsvu e1ckbxcu2">
2
</div>
</div>
<div class="css-clrhqf">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Confirm that the validation prevents invalid documents.
<a class="headerlink leafygreen-ui-1kepx47" href="#confirm-that-the-validation-prevents-invalid-documents." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="confirm-that-the-validation-prevents-invalid-documents.">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following insert operation fails because
<code class="leafygreen-ui-1l06pbn">
country
</code>
is
<code class="leafygreen-ui-1l06pbn">
Germany
</code>
, which isn't in the list of allowed values.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.shipping.insertOne( {\n item: \"sweater\",\n size: \"medium\",\n country: \"Germany\"\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">shipping</span>.<span class="lg-highlight-title lg-highlight-function">insertOne</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"sweater"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <span class="lg-highlight-string">"medium"</span>,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">country</span>: <span class="lg-highlight-string">"Germany"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns this error:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"MongoServerError: Document failed validation\nAdditional information: {\n failingDocumentId: ObjectId(\"630d1057931191850b40d0aa\"),\n details: {\n operatorName: '$jsonSchema',\n title: 'Shipping Country Validation',\n schemaRulesNotSatisfied: [\n {\n operatorName: 'properties',\n propertiesNotSatisfied: [\n {\n propertyName: 'country',\n description: 'Must be either France, United Kingdom, or United States',\n details: [\n {\n operatorName: 'enum',\n specifiedAs: {\n enum: [ 'France', 'United Kingdom', 'United States' ]\n },\n reason: 'value was not found in enum',\n consideredValue: 'Germany'\n }\n ]\n }\n ]\n }\n ]\n }\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">MongoServerError</span>: <span class="lg-highlight-title lg-highlight-class">Document</span> failed validation</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">Additional</span> <span class="lg-highlight-attr">information</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">failingDocumentId</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"630d1057931191850b40d0aa"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">details</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">operatorName</span>: <span class="lg-highlight-string">'$jsonSchema'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">title</span>: <span class="lg-highlight-string">'Shipping Country Validation'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">schemaRulesNotSatisfied</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">operatorName</span>: <span class="lg-highlight-string">'properties'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">propertiesNotSatisfied</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">propertyName</span>: <span class="lg-highlight-string">'country'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">description</span>: <span class="lg-highlight-string">'Must be either France, United Kingdom, or United States'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">details</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">operatorName</span>: <span class="lg-highlight-string">'enum'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">specifiedAs</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">enum</span>: <!-- -->[ <span class="lg-highlight-string">'France'</span>, <span class="lg-highlight-string">'United Kingdom'</span>, <span class="lg-highlight-string">'United States'</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">reason</span>: <span class="lg-highlight-string">'value was not found in enum'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">consideredValue</span>: <span class="lg-highlight-string">'Germany'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</div>
</div>
<div class="css-vq8pj5 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-18jxsvu e1ckbxcu2">
3
</div>
</div>
<div class="css-clrhqf">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Insert a valid document.
<a class="headerlink leafygreen-ui-1kepx47" href="#insert-a-valid-document." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="insert-a-valid-document.">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The insert succeeds after you change the
<code class="leafygreen-ui-1l06pbn">
country
</code>
field to one
of the allowed values:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.shipping.insertOne( {\n item: \"sweater\",\n size: \"medium\",\n country: \"France\"\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">shipping</span>.<span class="lg-highlight-title lg-highlight-function">insertOne</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"sweater"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <span class="lg-highlight-string">"medium"</span>,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">country</span>: <span class="lg-highlight-string">"France"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</div>
</div>
<div class="css-vq8pj5 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-18jxsvu e1ckbxcu2">
4
</div>
</div>
<div class="css-clrhqf">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Query for the valid document.
<a class="headerlink leafygreen-ui-1kepx47" href="#query-for-the-valid-document." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="query-for-the-valid-document.">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To confirm that the document was successfully inserted, query the
<code class="leafygreen-ui-1l06pbn">
shipping
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.shipping.find()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">shipping</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
MongoDB returns the document:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n _id: ObjectId(\"630d10d5931191850b40d0ab\"),\n item: 'sweater',\n size: 'medium',\n country: 'France'\n }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"630d10d5931191850b40d0ab"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'sweater'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <span class="lg-highlight-string">'medium'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">country</span>: <span class="lg-highlight-string">'France'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</div>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/command/nav-sessions/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Sessions Commands
<a class="headerlink leafygreen-ui-1kepx47" href="#sessions-commands" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sessions-commands">
</div>
</a>
</h1>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
For details on a specific command, including syntax and examples,
click on the link to the command's reference page.
</p>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:30%"/>
<col style="width:50%"/>
<col style="width:20%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Command
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Atlas Support
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/abortTransaction/#mongodb-dbcommand-dbcmd.abortTransaction">
<code class="leafygreen-ui-1l06pbn">
abortTransaction
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Abort transaction.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Yes
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/commitTransaction/#mongodb-dbcommand-dbcmd.commitTransaction">
<code class="leafygreen-ui-1l06pbn">
commitTransaction
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Commit transaction.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Yes
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/endSessions/#mongodb-dbcommand-dbcmd.endSessions">
<code class="leafygreen-ui-1l06pbn">
endSessions
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Expire sessions before the sessions' timeout period.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Yes
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/killAllSessions/#mongodb-dbcommand-dbcmd.killAllSessions">
<code class="leafygreen-ui-1l06pbn">
killAllSessions
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Kill all sessions.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
No support for
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/#unsupported-commands" target="_self">
<span>
M0, M2, M5
</span>
</a>
and
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/#unsupported-commands-1" target="_self">
<span>
M10 clusters
<!-- -->
.
</span>
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/killAllSessionsByPattern/#mongodb-dbcommand-dbcmd.killAllSessionsByPattern">
<code class="leafygreen-ui-1l06pbn">
killAllSessionsByPattern
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Kill all sessions that match the specified pattern
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
No support for
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/#unsupported-commands" target="_self">
<span>
M0, M2, and M5 clusters
<!-- -->
.
</span>
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/killSessions/#mongodb-dbcommand-dbcmd.killSessions">
<code class="leafygreen-ui-1l06pbn">
killSessions
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Kill specified sessions.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
No support for
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/#unsupported-commands" target="_self">
<span>
M0, M2, and M5 clusters
<!-- -->
.
</span>
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/refreshSessions/#mongodb-dbcommand-dbcmd.refreshSessions">
<code class="leafygreen-ui-1l06pbn">
refreshSessions
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Refresh idle sessions.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Yes
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/startSession/#mongodb-dbcommand-dbcmd.startSession">
<code class="leafygreen-ui-1l06pbn">
startSession
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Starts a new session.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Yes
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
|
https://www.mongodb.com/docs/manual/tutorial/merge-chunks-in-sharded-cluster/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Merge Chunks in a Sharded Cluster
<a class="headerlink leafygreen-ui-1kepx47" href="#merge-chunks-in-a-sharded-cluster" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="merge-chunks-in-a-sharded-cluster">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#overview" target="_self">
<span>
Overview
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#procedure" target="_self">
<span>
Procedure
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Overview
<a class="headerlink leafygreen-ui-1kepx47" href="#overview" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="overview">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/mergeChunks/#mongodb-dbcommand-dbcmd.mergeChunks">
<code class="leafygreen-ui-1l06pbn">
mergeChunks
</code>
</a>
command allows you to combine continuous
chunks on the same shard into a single chunk. This tutorial explains
how to merge neighboring chunks in a sharded cluster.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Procedure
<a class="headerlink leafygreen-ui-1kepx47" href="#procedure" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="procedure">
</div>
</a>
</h2>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Examples in this procedure use a
<code class="leafygreen-ui-1l06pbn">
members
</code>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-collection">
collection
</a>
in the
<code class="leafygreen-ui-1l06pbn">
test
</code>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-database">
database
</a>
, using the
<code class="leafygreen-ui-1l06pbn">
username
</code>
field as the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-shard-key">
shard key
<!-- -->
.
</a>
</p>
</div>
</div>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Identify Chunk Ranges
<a class="headerlink leafygreen-ui-1kepx47" href="#identify-chunk-ranges" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="identify-chunk-ranges">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
In
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
, identify the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-chunk">
chunk
</a>
ranges with the following operation:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.status()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">status</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
In the output, the chunk ranges appear after the chunk counts for each
sharded collection, as in the following example:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"--- Sharding Status ---\n sharding version: {\n \"_id\" : 1,\n \"minCompatibleVersion\" : 5,\n \"currentVersion\" : 6,\n \"clusterId\" : ObjectId(\"5ebf0bfd3eeb6037ec7cbba9\")\n }\n shards:\n { \"_id\" : \"shardA\", \"host\" : \"shardA/shardA-m1.example.net:27018,shardA-m2.example.net:27018,shardA-m3.example.net:27018\", \"state\" : 1 }\n { \"_id\" : \"shardB\", \"host\" : \"shardB/shardB-m1.example.net:27018,shardB-m2.example.net:27018,shardB-m3.example.net:27018\", \"state\" : 1 }\n active mongoses:\n \"4.4.0\" : 1\n autosplit:\n Currently enabled: yes\n balancer:\n Currently enabled: yes\n Currently running: no\n Failed balancer rounds in last 5 attempts: 0\n Migration Results for the last 24 hours:\n 519 : Success\n databases:\n { \"_id\" : \"config\", \"primary\" : \"config\" }\n config.system.sessions\n shard key: { \"_id\" : 1 }\n unique: false\n balancing: true\n chunks:\n shardA 512\n shardB 512\n too many chunks to print, use verbose if you want to force print\n { \"_id\" : \"test\", \"primary\" : \"shardA\", \"version\" : { \"uuid\" : UUID(\"22c042fc-7e3d-4c6d-992d-f3d714759781\"), \"lastMod\" : 1 } }\n test.members\n shard key: { \"username\" : 1 }\n unique: false\n balancing: true\n chunks:\n shardA 7\n shardB 7\n { \"username\" : { \"$minKey\" : 1 } } -->> { \"username\" : \"user16643\" } on : shardB Timestamp(13, 0)\n { \"username\" : \"user16643\" } -->> { \"username\" : \"user2329\" } on : shardB Timestamp(16, 0)\n { \"username\" : \"user2329\" } -->> { \"username\" : \"user29937\" } on : shardB Timestamp(17, 0)\n { \"username\" : \"user29937\" } -->> { \"username\" : \"user36583\" } on : shardB Timestamp(18, 0)\n { \"username\" : \"user36583\" } -->> { \"username\" : \"user43229\" } on : shardB Timestamp(19, 0)\n { \"username\" : \"user43229\" } -->> { \"username\" : \"user49877\" } on : shardB Timestamp(20, 0)\n { \"username\" : \"user49877\" } -->> { \"username\" : \"user56522\" } on : shardB Timestamp(21, 0)\n { \"username\" : \"user56522\" } -->> { \"username\" : \"user63169\" } on : shardA Timestamp(21, 1)\n { \"username\" : \"user63169\" } -->> { \"username\" : \"user69816\" } on : shardA Timestamp(10, 1)\n { \"username\" : \"user69816\" } -->> { \"username\" : \"user76462\" } on : shardA Timestamp(11, 1)\n { \"username\" : \"user76462\" } -->> { \"username\" : \"user83108\" } on : shardA Timestamp(12, 1)\n { \"username\" : \"user83108\" } -->> { \"username\" : \"user89756\" } on : shardA Timestamp(14, 1)\n { \"username\" : \"user89756\" } -->> { \"username\" : \"user96401\" } on : shardA Timestamp(15, 1)\n { \"username\" : \"user96401\" } -->> { \"username\" : { \"$maxKey\" : 1 } } on : shardA Timestamp(15, 2)"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">--- Sharding Status ---</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> sharding version: {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> "_id" : 1,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> "minCompatibleVersion" : 5,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> "currentVersion" : 6,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> "clusterId" : ObjectId("5ebf0bfd3eeb6037ec7cbba9")</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shards:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "_id" : "shardA", "host" : "shardA/shardA-m1.example.net:27018,shardA-m2.example.net:27018,shardA-m3.example.net:27018", "state" : 1 }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "_id" : "shardB", "host" : "shardB/shardB-m1.example.net:27018,shardB-m2.example.net:27018,shardB-m3.example.net:27018", "state" : 1 }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> active mongoses:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> "4.4.0" : 1</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> autosplit:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> Currently enabled: yes</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> balancer:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> Currently enabled: yes</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> Currently running: no</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> Failed balancer rounds in last 5 attempts: 0</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> Migration Results for the last 24 hours:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> 519 : Success</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> databases:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "_id" : "config", "primary" : "config" }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> config.system.sessions</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shard key: { "_id" : 1 }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> unique: false</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> balancing: true</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> chunks:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shardA 512</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shardB 512</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> too many chunks to print, use verbose if you want to force print</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "_id" : "test", "primary" : "shardA", "version" : { "uuid" : UUID("22c042fc-7e3d-4c6d-992d-f3d714759781"), "lastMod" : 1 } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> test.members</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shard key: { "username" : 1 }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> unique: false</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> balancing: true</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> chunks:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shardA 7</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shardB 7</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : { "$minKey" : 1 } } -->> { "username" : "user16643" } on : shardB Timestamp(13, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user16643" } -->> { "username" : "user2329" } on : shardB Timestamp(16, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user2329" } -->> { "username" : "user29937" } on : shardB Timestamp(17, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user29937" } -->> { "username" : "user36583" } on : shardB Timestamp(18, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user36583" } -->> { "username" : "user43229" } on : shardB Timestamp(19, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user43229" } -->> { "username" : "user49877" } on : shardB Timestamp(20, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user49877" } -->> { "username" : "user56522" } on : shardB Timestamp(21, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user56522" } -->> { "username" : "user63169" } on : shardA Timestamp(21, 1)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user63169" } -->> { "username" : "user69816" } on : shardA Timestamp(10, 1)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user69816" } -->> { "username" : "user76462" } on : shardA Timestamp(11, 1)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user76462" } -->> { "username" : "user83108" } on : shardA Timestamp(12, 1)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user83108" } -->> { "username" : "user89756" } on : shardA Timestamp(14, 1)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user89756" } -->> { "username" : "user96401" } on : shardA Timestamp(15, 1)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user96401" } -->> { "username" : { "$maxKey" : 1 } } on : shardA Timestamp(15, 2)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The chunk ranges appear after the chunk counts for each sharded
collection. For example, the following are the chunk ranges for the
<code class="leafygreen-ui-1l06pbn">
test.members
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"username\" : { \"$minKey\" : 1 } } -->> { \"username\" : \"user16643\" } on : shardB Timestamp(13, 0)\n{ \"username\" : \"user16643\" } -->> { \"username\" : \"user2329\" } on : shardB Timestamp(16, 0)\n{ \"username\" : \"user2329\" } -->> { \"username\" : \"user29937\" } on : shardB Timestamp(17, 0)\n{ \"username\" : \"user29937\" } -->> { \"username\" : \"user36583\" } on : shardB Timestamp(18, 0)\n{ \"username\" : \"user36583\" } -->> { \"username\" : \"user43229\" } on : shardB Timestamp(19, 0)\n{ \"username\" : \"user43229\" } -->> { \"username\" : \"user49877\" } on : shardB Timestamp(20, 0)\n{ \"username\" : \"user49877\" } -->> { \"username\" : \"user56522\" } on : shardB Timestamp(21, 0)\n{ \"username\" : \"user56522\" } -->> { \"username\" : \"user63169\" } on : shardA Timestamp(21, 1)\n{ \"username\" : \"user63169\" } -->> { \"username\" : \"user69816\" } on : shardA Timestamp(10, 1)\n{ \"username\" : \"user69816\" } -->> { \"username\" : \"user76462\" } on : shardA Timestamp(11, 1)\n{ \"username\" : \"user76462\" } -->> { \"username\" : \"user83108\" } on : shardA Timestamp(12, 1)\n{ \"username\" : \"user83108\" } -->> { \"username\" : \"user89756\" } on : shardA Timestamp(14, 1)\n{ \"username\" : \"user89756\" } -->> { \"username\" : \"user96401\" } on : shardA Timestamp(15, 1)\n{ \"username\" : \"user96401\" } -->> { \"username\" : { \"$maxKey\" : 1 } } on : shardA Timestamp(15, 2)"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ "username" : { "$minKey" : 1 } } -->> { "username" : "user16643" } on : shardB Timestamp(13, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ "username" : "user16643" } -->> { "username" : "user2329" } on : shardB Timestamp(16, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ "username" : "user2329" } -->> { "username" : "user29937" } on : shardB Timestamp(17, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ "username" : "user29937" } -->> { "username" : "user36583" } on : shardB Timestamp(18, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ "username" : "user36583" } -->> { "username" : "user43229" } on : shardB Timestamp(19, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ "username" : "user43229" } -->> { "username" : "user49877" } on : shardB Timestamp(20, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ "username" : "user49877" } -->> { "username" : "user56522" } on : shardB Timestamp(21, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ "username" : "user56522" } -->> { "username" : "user63169" } on : shardA Timestamp(21, 1)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ "username" : "user63169" } -->> { "username" : "user69816" } on : shardA Timestamp(10, 1)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ "username" : "user69816" } -->> { "username" : "user76462" } on : shardA Timestamp(11, 1)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ "username" : "user76462" } -->> { "username" : "user83108" } on : shardA Timestamp(12, 1)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ "username" : "user83108" } -->> { "username" : "user89756" } on : shardA Timestamp(14, 1)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ "username" : "user89756" } -->> { "username" : "user96401" } on : shardA Timestamp(15, 1)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ "username" : "user96401" } -->> { "username" : { "$maxKey" : 1 } } on : shardA Timestamp(15, 2)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Merge Chunks
<a class="headerlink leafygreen-ui-1kepx47" href="#merge-chunks" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="merge-chunks">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Merge contiguous
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-chunk">
chunks
</a>
on the same shard.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, consider the following chunk ranges on
<code class="leafygreen-ui-1l06pbn">
shardA
</code>
:
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The chunks to be merged are highlighted.
</p>
</div>
</div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"username\" : \"user56522\" } -->> { \"username\" : \"user63169\" } on : shardA Timestamp(21, 1)\n{ \"username\" : \"user63169\" } -->> { \"username\" : \"user69816\" } on : shardA Timestamp(10, 1)\n{ \"username\" : \"user69816\" } -->> { \"username\" : \"user76462\" } on : shardA Timestamp(11, 1)\n{ \"username\" : \"user76462\" } -->> { \"username\" : \"user83108\" } on : shardA Timestamp(12, 1)\n{ \"username\" : \"user83108\" } -->> { \"username\" : \"user89756\" } on : shardA Timestamp(14, 1)\n{ \"username\" : \"user89756\" } -->> { \"username\" : \"user96401\" } on : shardA Timestamp(15, 1)\n{ \"username\" : \"user96401\" } -->> { \"username\" : { \"$maxKey\" : 1 } } on : shardA Timestamp(15, 2)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user56522"</span> } <!-- -->-<!-- -->-<!-- -->>> <!-- -->{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user63169"</span> } on <!-- -->: <!-- -->shardA <span class="lg-highlight-title lg-highlight-class">Timestamp</span>(<span class="lg-highlight-number">21</span>, <span class="lg-highlight-number">1</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user63169"</span> } <!-- -->-<!-- -->-<!-- -->>> <!-- -->{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user69816"</span> } on <!-- -->: <!-- -->shardA <span class="lg-highlight-title lg-highlight-class">Timestamp</span>(<span class="lg-highlight-number">10</span>, <span class="lg-highlight-number">1</span>)</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user69816"</span> } <!-- -->-<!-- -->-<!-- -->>> <!-- -->{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user76462"</span> } on <!-- -->: <!-- -->shardA <span class="lg-highlight-title lg-highlight-class">Timestamp</span>(<span class="lg-highlight-number">11</span>, <span class="lg-highlight-number">1</span>)</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user76462"</span> } <!-- -->-<!-- -->-<!-- -->>> <!-- -->{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user83108"</span> } on <!-- -->: <!-- -->shardA <span class="lg-highlight-title lg-highlight-class">Timestamp</span>(<span class="lg-highlight-number">12</span>, <span class="lg-highlight-number">1</span>)</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user83108"</span> } <!-- -->-<!-- -->-<!-- -->>> <!-- -->{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user89756"</span> } on <!-- -->: <!-- -->shardA <span class="lg-highlight-title lg-highlight-class">Timestamp</span>(<span class="lg-highlight-number">14</span>, <span class="lg-highlight-number">1</span>)</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user89756"</span> } <!-- -->-<!-- -->-<!-- -->>> <!-- -->{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user96401"</span> } on <!-- -->: <!-- -->shardA <span class="lg-highlight-title lg-highlight-class">Timestamp</span>(<span class="lg-highlight-number">15</span>, <span class="lg-highlight-number">1</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user96401"</span> } <!-- -->-<!-- -->-<!-- -->>> <!-- -->{ <span class="lg-highlight-string">"username"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"$maxKey"</span> <!-- -->: <span class="lg-highlight-number">1</span> } } on <!-- -->: <!-- -->shardA <span class="lg-highlight-title lg-highlight-class">Timestamp</span>(<span class="lg-highlight-number">15</span>, <span class="lg-highlight-number">2</span>)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To merge the highlighted contiguous chunks, issue the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/mergeChunks/#mongodb-dbcommand-dbcmd.mergeChunks">
<code class="leafygreen-ui-1l06pbn">
mergeChunks
</code>
</a>
command against the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.adminCommand( {\n mergeChunks: \"test.members\",\n bounds: [ { \"username\" : \"user69816\" },\n { \"username\" : \"user96401\" } ]\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mergeChunks</span>: <span class="lg-highlight-string">"test.members"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">bounds</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user69816"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"username"</span> <!-- -->: <span class="lg-highlight-string">"user96401"</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
On success,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/mergeChunks/#mongodb-dbcommand-dbcmd.mergeChunks">
<code class="leafygreen-ui-1l06pbn">
mergeChunks
</code>
</a>
produces the following output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"ok\" : 1,\n \"operationTime\" : Timestamp(1589580356, 14),\n \"$clusterTime\" : {\n \"clusterTime\" : Timestamp(1589580356, 14),\n \"signature\" : {\n \"hash\" : BinData(0,\"up5VKd49G/uPCq1iger2nOtfIHw=\"),\n \"keyId\" : NumberLong(\"6827188741371592725\")\n }\n }\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"ok"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"operationTime"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">Timestamp</span>(<span class="lg-highlight-number">1589580356</span>, <span class="lg-highlight-number">14</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"$clusterTime"</span> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"clusterTime"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">Timestamp</span>(<span class="lg-highlight-number">1589580356</span>, <span class="lg-highlight-number">14</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"signature"</span> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"hash"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">BinData</span>(<span class="lg-highlight-number">0</span>,<span class="lg-highlight-string">"up5VKd49G/uPCq1iger2nOtfIHw="</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"keyId"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-string">"6827188741371592725"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
On any failure condition,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/mergeChunks/#mongodb-dbcommand-dbcmd.mergeChunks">
<code class="leafygreen-ui-1l06pbn">
mergeChunks
</code>
</a>
returns a document
where the value of the
<code class="leafygreen-ui-1l06pbn">
ok
</code>
field is
<code class="leafygreen-ui-1l06pbn">
0
</code>
.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
View Merged Chunks Ranges
<a class="headerlink leafygreen-ui-1kepx47" href="#view-merged-chunks-ranges" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="view-merged-chunks-ranges">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
After merging the identified chunks, confirm the new chunk, as follows:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.status()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">status</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The output of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.status/#mongodb-method-sh.status">
<code class="leafygreen-ui-1l06pbn">
sh.status()
</code>
</a>
should resemble:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"--- Sharding Status ---\n sharding version: {\n \"_id\" : 1,\n \"minCompatibleVersion\" : 5,\n \"currentVersion\" : 6,\n \"clusterId\" : ObjectId(\"5ebef5447fa151d4bd79dd72\")\n }\n shards:\n { \"_id\" : \"shardA\", \"host\" : \"shardA/shardA-m1.example.net:27018,shardA-m2.example.net:27018,shardA-m3.example.net:27018\", \"state\" : 1 }\n { \"_id\" : \"shardB\", \"host\" : \"shardB/shardB-m1.example.net:27018,shardB-m2.example.net:27018,shardB-m3.example.net:27018\", \"state\" : 1 }\n active mongoses:\n \"4.4.0\" : 1\n autosplit:\n Currently enabled: yes\n balancer:\n Currently enabled: yes\n Currently running: no\n Failed balancer rounds in last 5 attempts: 0\n Migration Results for the last 24 hours:\n 519 : Success\n databases:\n { \"_id\" : \"config\", \"primary\" : \"config\" }\n config.system.sessions\n shard key: { \"_id\" : 1 }\n unique: false\n balancing: true\n chunks:\n shardA 512\n shardB 512\n too many chunks to print, use verbose if you want to force print\n { \"_id\" : \"test\", \"primary\" : \"shardA\", \"version\" : { \"uuid\" : UUID(\"22c042fc-7e3d-4c6d-992d-f3d714759781\"), \"lastMod\" : 1 } }\n test.members\n shard key: { \"username\" : 1 }\n unique: false\n balancing: true\n chunks:\n shardA 5\n shardB 6\n { \"username\" : { \"$minKey\" : 1 } } -->> { \"username\" : \"user16643\" } on : shardA Timestamp(22, 0)\n { \"username\" : \"user16643\" } -->> { \"username\" : \"user2329\" } on : shardB Timestamp(22, 1)\n { \"username\" : \"user2329\" } -->> { \"username\" : \"user29937\" } on : shardB Timestamp(17, 0)\n { \"username\" : \"user29937\" } -->> { \"username\" : \"user36583\" } on : shardB Timestamp(18, 0)\n { \"username\" : \"user36583\" } -->> { \"username\" : \"user43229\" } on : shardB Timestamp(19, 0)\n { \"username\" : \"user43229\" } -->> { \"username\" : \"user49877\" } on : shardB Timestamp(20, 0)\n { \"username\" : \"user49877\" } -->> { \"username\" : \"user56522\" } on : shardB Timestamp(21, 0)\n { \"username\" : \"user56522\" } -->> { \"username\" : \"user63169\" } on : shardA Timestamp(21, 1)\n { \"username\" : \"user63169\" } -->> { \"username\" : \"user69816\" } on : shardA Timestamp(10, 1)\n { \"username\" : \"user69816\" } -->> { \"username\" : \"user96401\" } on : shardA Timestamp(21, 2)\n { \"username\" : \"user96401\" } -->> { \"username\" : { \"$maxKey\" : 1 } } on : shardA Timestamp(15, 2)"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">--- Sharding Status ---</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> sharding version: {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> "_id" : 1,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> "minCompatibleVersion" : 5,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> "currentVersion" : 6,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> "clusterId" : ObjectId("5ebef5447fa151d4bd79dd72")</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shards:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "_id" : "shardA", "host" : "shardA/shardA-m1.example.net:27018,shardA-m2.example.net:27018,shardA-m3.example.net:27018", "state" : 1 }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "_id" : "shardB", "host" : "shardB/shardB-m1.example.net:27018,shardB-m2.example.net:27018,shardB-m3.example.net:27018", "state" : 1 }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> active mongoses:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> "4.4.0" : 1</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> autosplit:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> Currently enabled: yes</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> balancer:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> Currently enabled: yes</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> Currently running: no</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> Failed balancer rounds in last 5 attempts: 0</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> Migration Results for the last 24 hours:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> 519 : Success</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> databases:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "_id" : "config", "primary" : "config" }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> config.system.sessions</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shard key: { "_id" : 1 }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> unique: false</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> balancing: true</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> chunks:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shardA 512</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shardB 512</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> too many chunks to print, use verbose if you want to force print</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "_id" : "test", "primary" : "shardA", "version" : { "uuid" : UUID("22c042fc-7e3d-4c6d-992d-f3d714759781"), "lastMod" : 1 } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> test.members</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shard key: { "username" : 1 }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> unique: false</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> balancing: true</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> chunks:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shardA 5</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shardB 6</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : { "$minKey" : 1 } } -->> { "username" : "user16643" } on : shardA Timestamp(22, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user16643" } -->> { "username" : "user2329" } on : shardB Timestamp(22, 1)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user2329" } -->> { "username" : "user29937" } on : shardB Timestamp(17, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user29937" } -->> { "username" : "user36583" } on : shardB Timestamp(18, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user36583" } -->> { "username" : "user43229" } on : shardB Timestamp(19, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user43229" } -->> { "username" : "user49877" } on : shardB Timestamp(20, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user49877" } -->> { "username" : "user56522" } on : shardB Timestamp(21, 0)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user56522" } -->> { "username" : "user63169" } on : shardA Timestamp(21, 1)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user63169" } -->> { "username" : "user69816" } on : shardA Timestamp(10, 1)</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> { "username" : "user69816" } -->> { "username" : "user96401" } on : shardA Timestamp(21, 2)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { "username" : "user96401" } -->> { "username" : { "$maxKey" : 1 } } on : shardA Timestamp(15, 2)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
After the merge, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-balancer-administration/#std-label-sharding-balancing">
balancer
</a>
may migrate
chunks across shards to ensure a more even distribution of chunks.
</p>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/aggregation/bottom/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$bottom (aggregation accumulator)
<a class="headerlink leafygreen-ui-1kepx47" href="#-bottom--aggregation-accumulator-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-bottom--aggregation-accumulator-">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#restrictions" target="_self">
<span>
Restrictions
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="group">
<dt>
<code class="leafygreen-ui-1l06pbn">
$bottom
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-group-grp.-bottom" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-group-grp.-bottom">
</div>
</a>
</dt>
<dd>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
5.2
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
Returns the bottom element within a group according to the specified
sort order.
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n $bottom:\n {\n sortBy: { <field1>: <sort>, <field2>: <sort> ... },\n output: <expression>\n }\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $bottom:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> sortBy: { <field1>: <sort order>, <field2>: <sort order> ... },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> output: <expression></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:15%"/>
<col style="width:15%"/>
<col style="width:70%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Necessity
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
sortBy
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Required
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Specifies the order of results, with syntax similar to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/sort/#mongodb-pipeline-pipe.-sort">
<code class="leafygreen-ui-1l06pbn">
$sort
</code>
.
</a>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
output
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Required
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Represents the output for each element in the group
and can be any expression.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
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<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Null and Missing Values
<a class="headerlink leafygreen-ui-1kepx47" href="#null-and-missing-values" title="Permalink to this heading">
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<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="null-and-missing-values">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Consider the following aggregation that returns the bottom
document from a group of scores:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
$bottom
</code>
does not filter out null values.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
$bottom
</code>
converts missing values to null.
</p>
</li>
</ul>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.aggregate( [\n {\n $documents: [\n { playerId: \"PlayerA\", gameId: \"G1\", score: 1 },\n { playerId: \"PlayerB\", gameId: \"G1\", score: 2 },\n { playerId: \"PlayerC\", gameId: \"G1\", score: 3 },\n { playerId: \"PlayerD\", gameId: \"G1\"},\n { playerId: \"PlayerE\", gameId: \"G1\", score: null }\n ]\n },\n {\n $group:\n {\n _id: \"$gameId\",\n playerId:\n {\n $bottom:\n {\n output: [ \"$playerId\", \"$score\" ],\n sortBy: { \"score\": -1 }\n }\n }\n }\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$documents</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">playerId</span>: <span class="lg-highlight-string">"PlayerA"</span>, <span class="lg-highlight-attr">gameId</span>: <span class="lg-highlight-string">"G1"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">1</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">playerId</span>: <span class="lg-highlight-string">"PlayerB"</span>, <span class="lg-highlight-attr">gameId</span>: <span class="lg-highlight-string">"G1"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">2</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">playerId</span>: <span class="lg-highlight-string">"PlayerC"</span>, <span class="lg-highlight-attr">gameId</span>: <span class="lg-highlight-string">"G1"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">3</span> }<!-- -->,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">playerId</span>: <span class="lg-highlight-string">"PlayerD"</span>, <span class="lg-highlight-attr">gameId</span>: <span class="lg-highlight-string">"G1"</span>}<!-- -->,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">playerId</span>: <span class="lg-highlight-string">"PlayerE"</span>, <span class="lg-highlight-attr">gameId</span>: <span class="lg-highlight-string">"G1"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-literal">null</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$group</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-string">"$gameId"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">playerId</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$bottom</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">output</span>: <!-- -->[ <span class="lg-highlight-string">"$playerId"</span>, <span class="lg-highlight-string">"$score"</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">sortBy</span>: <!-- -->{ <span class="lg-highlight-string">"score"</span>: <!-- -->-<span class="lg-highlight-number">1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
In this example:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/documents/#mongodb-pipeline-pipe.-documents">
<code class="leafygreen-ui-1l06pbn">
$documents
</code>
</a>
creates the literal documents that contain
player scores.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
groups the documents by
<code class="leafygreen-ui-1l06pbn">
gameId
</code>
. This
example has only one
<code class="leafygreen-ui-1l06pbn">
gameId
</code>
,
<code class="leafygreen-ui-1l06pbn">
G1
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
PlayerD
</code>
has a missing score and
<code class="leafygreen-ui-1l06pbn">
PlayerE
</code>
has a
null
<code class="leafygreen-ui-1l06pbn">
score
</code>
. These values are both considered as null.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
playerId
</code>
and
<code class="leafygreen-ui-1l06pbn">
score
</code>
fields are specified as
<code class="leafygreen-ui-1l06pbn">
output : ["$playerId"," $score"]
</code>
and returned as array values.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Specify the sort order with
<code class="leafygreen-ui-1l06pbn">
sortBy: { "score": -1 }
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
PlayerD
</code>
and
<code class="leafygreen-ui-1l06pbn">
PlayerE
</code>
tied for the bottom element.
<code class="leafygreen-ui-1l06pbn">
PlayerD
</code>
is returned as the bottom
<code class="leafygreen-ui-1l06pbn">
score
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
To have more deterministic tie breaking behavior for multiple null
values, add more fields to
<code class="leafygreen-ui-1l06pbn">
sortBy
</code>
.
</p>
</li>
</ul>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n _id: 'G1',\n playerId: [ 'PlayerD', null ]\n }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-string">'G1'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">playerId</span>: <!-- -->[ <span class="lg-highlight-string">'PlayerD'</span>, <span class="lg-highlight-literal">null</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Restrictions
<a class="headerlink leafygreen-ui-1kepx47" href="#restrictions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="restrictions">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Window Function and Aggregation Expression Support
<a class="headerlink leafygreen-ui-1kepx47" href="#window-function-and-aggregation-expression-support" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="window-function-and-aggregation-expression-support">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
$bottom
</code>
is not supported as a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
aggregation expression
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
$bottom
</code>
is supported as a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#mongodb-pipeline-pipe.-setWindowFields">
<code class="leafygreen-ui-1l06pbn">
window operator
</code>
.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Memory Limit Considerations
<a class="headerlink leafygreen-ui-1kepx47" href="#memory-limit-considerations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="memory-limit-considerations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Aggregation pipelines which call
<code class="leafygreen-ui-1l06pbn">
$bottom
</code>
are subject to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/aggregation-pipeline-limits/#std-label-agg-memory-restrictions">
100 MB limit
</a>
. If this
limit is exceeded for an individual group, the aggregation fails
with an error.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Consider a
<code class="leafygreen-ui-1l06pbn">
gamescores
</code>
collection with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.gamescores.insertMany([\n { playerId: \"PlayerA\", gameId: \"G1\", score: 31 },\n { playerId: \"PlayerB\", gameId: \"G1\", score: 33 },\n { playerId: \"PlayerC\", gameId: \"G1\", score: 99 },\n { playerId: \"PlayerD\", gameId: \"G1\", score: 1 },\n { playerId: \"PlayerA\", gameId: \"G2\", score: 10 },\n { playerId: \"PlayerB\", gameId: \"G2\", score: 14 },\n { playerId: \"PlayerC\", gameId: \"G2\", score: 66 },\n { playerId: \"PlayerD\", gameId: \"G2\", score: 80 }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">gamescores</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">playerId</span>: <span class="lg-highlight-string">"PlayerA"</span>, <span class="lg-highlight-attr">gameId</span>: <span class="lg-highlight-string">"G1"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">31</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">playerId</span>: <span class="lg-highlight-string">"PlayerB"</span>, <span class="lg-highlight-attr">gameId</span>: <span class="lg-highlight-string">"G1"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">33</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">playerId</span>: <span class="lg-highlight-string">"PlayerC"</span>, <span class="lg-highlight-attr">gameId</span>: <span class="lg-highlight-string">"G1"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">99</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">playerId</span>: <span class="lg-highlight-string">"PlayerD"</span>, <span class="lg-highlight-attr">gameId</span>: <span class="lg-highlight-string">"G1"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">1</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">playerId</span>: <span class="lg-highlight-string">"PlayerA"</span>, <span class="lg-highlight-attr">gameId</span>: <span class="lg-highlight-string">"G2"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">10</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">playerId</span>: <span class="lg-highlight-string">"PlayerB"</span>, <span class="lg-highlight-attr">gameId</span>: <span class="lg-highlight-string">"G2"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">14</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">playerId</span>: <span class="lg-highlight-string">"PlayerC"</span>, <span class="lg-highlight-attr">gameId</span>: <span class="lg-highlight-string">"G2"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">66</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">playerId</span>: <span class="lg-highlight-string">"PlayerD"</span>, <span class="lg-highlight-attr">gameId</span>: <span class="lg-highlight-string">"G2"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">80</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Find the Bottom
<code class="leafygreen-ui-1l06pbn">
Score
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#find-the-bottom-score" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="find-the-bottom-score">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
You can use the
<code class="leafygreen-ui-1l06pbn">
$bottom
</code>
accumulator to find the bottom score in a
single game.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.gamescores.aggregate( [\n {\n $match : { gameId : \"G1\" }\n },\n {\n $group:\n {\n _id: \"$gameId\",\n playerId:\n {\n $bottom:\n {\n output: [ \"$playerId\", \"$score\" ],\n sortBy: { \"score\": -1 }\n }\n }\n }\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">gamescores</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->$match<!-- --> <!-- -->: <!-- -->{ <!-- -->gameId <!-- -->: <span class="lg-highlight-string">"G1"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$group</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-string">"$gameId"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">playerId</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$bottom</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">output</span>: <!-- -->[ <span class="lg-highlight-string">"$playerId"</span>, <span class="lg-highlight-string">"$score"</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">sortBy</span>: <!-- -->{ <span class="lg-highlight-string">"score"</span>: <!-- -->-<span class="lg-highlight-number">1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The example pipeline:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Uses
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/match/#mongodb-pipeline-pipe.-match">
<code class="leafygreen-ui-1l06pbn">
$match
</code>
</a>
to filter the results on a single
<code class="leafygreen-ui-1l06pbn">
gameId
</code>
.
In this case,
<code class="leafygreen-ui-1l06pbn">
G1
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Uses
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
to group the results by
<code class="leafygreen-ui-1l06pbn">
gameId
</code>
. In this
case,
<code class="leafygreen-ui-1l06pbn">
G1
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Specifies the fields that are output for
<code class="leafygreen-ui-1l06pbn">
$bottom
</code>
with
<code class="leafygreen-ui-1l06pbn">
output : ["$playerId"," $score"]
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Uses
<code class="leafygreen-ui-1l06pbn">
sortBy: { "score": -1 }
</code>
to sort the scores in descending order.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Uses
<code class="leafygreen-ui-1l06pbn">
$bottom
</code>
to return the bottom score for the game.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following results:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[ { _id: 'G1', playerId: [ 'PlayerD', 1 ] } ]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[ <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-string">'G1'</span>, <span class="lg-highlight-attr">playerId</span>: <!-- -->[ <span class="lg-highlight-string">'PlayerD'</span>, <span class="lg-highlight-number">1</span> ] } ]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Finding the Bottom
<code class="leafygreen-ui-1l06pbn">
Score
</code>
Across Multiple Games
<a class="headerlink leafygreen-ui-1kepx47" href="#finding-the-bottom-score-across-multiple-games" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="finding-the-bottom-score-across-multiple-games">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
You can use the
<code class="leafygreen-ui-1l06pbn">
$bottom
</code>
accumulator to find the bottom
<code class="leafygreen-ui-1l06pbn">
score
</code>
in each game.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.gamescores.aggregate( [\n {\n $group:\n { _id: \"$gameId\", playerId:\n {\n $bottom:\n {\n output: [ \"$playerId\", \"$score\" ],\n sortBy: { \"score\": -1 }\n }\n }\n }\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">gamescores</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$group</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-string">"$gameId"</span>, <span class="lg-highlight-attr">playerId</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$bottom</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">output</span>: <!-- -->[ <span class="lg-highlight-string">"$playerId"</span>, <span class="lg-highlight-string">"$score"</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">sortBy</span>: <!-- -->{ <span class="lg-highlight-string">"score"</span>: <!-- -->-<span class="lg-highlight-number">1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The example pipeline:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Uses
<code class="leafygreen-ui-1l06pbn">
$group
</code>
to group the results by
<code class="leafygreen-ui-1l06pbn">
gameId
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Uses
<code class="leafygreen-ui-1l06pbn">
$bottom
</code>
to return the bottom
<code class="leafygreen-ui-1l06pbn">
score
</code>
for each game.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Specifies the fields that are output for
<code class="leafygreen-ui-1l06pbn">
$bottom
</code>
with
<code class="leafygreen-ui-1l06pbn">
output : ["$playerId", "$score"]
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Uses
<code class="leafygreen-ui-1l06pbn">
sortBy: { "score": -1 }
</code>
to sort the scores in descending order.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following results:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n { _id: 'G2', playerId: [ 'PlayerA', 10 ] },\n { _id: 'G1', playerId: [ 'PlayerD', 1 ] }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-string">'G2'</span>, <span class="lg-highlight-attr">playerId</span>: <!-- -->[ <span class="lg-highlight-string">'PlayerA'</span>, <span class="lg-highlight-number">10</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-string">'G1'</span>, <span class="lg-highlight-attr">playerId</span>: <!-- -->[ <span class="lg-highlight-string">'PlayerD'</span>, <span class="lg-highlight-number">1</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/data-modeling/data-consistency/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Data Consistency
<a class="headerlink leafygreen-ui-1kepx47" href="#data-consistency" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="data-consistency">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#use-cases" target="_self">
<span>
Use Cases
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#tasks" target="_self">
<span>
Tasks
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#details" target="_self">
<span>
Details
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#data-staleness" target="_self">
<span>
Data Staleness
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#referential-integrity" target="_self">
<span>
Referential Integrity
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#learn-more" target="_self">
<span>
Learn More
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
MongoDB gives you the flexibility to normalize or duplicate your data to
optimize your application. If you duplicate data in your schema, you
must decide how to keep duplicated data consistent across multiple
collections. Some applications require duplicated data to be made
consistent immediately, whereas other applications can tolerate reading
stale data.
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Use Cases
<a class="headerlink leafygreen-ui-1kepx47" href="#use-cases" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="use-cases">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
There are multiple ways to enforce data consistency in your
application:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:20%"/>
<col style="width:10%"/>
<col style="width:20%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Method
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Performance Impact
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Use Case
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions">
Transactions
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Updates to multiple collections occur in a single atomic
operation.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Potentially high, due to read contention
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Your application must always return up-to-date data, and
can tolerate potential negative performance impact during
periods of heavy reads.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/data-modeling/concepts/embedding-vs-references/#std-label-data-modeling-embedding">
Embed related data
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Modify the application schema to embed related data in a
single collection.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Low to moderate, depending on document size and indexes
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Your application always reads and updates the related data
at the same time. This solution simplifies your schema and
prevents the need for
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lookup/#mongodb-pipeline-pipe.-lookup">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
</a>
operations.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/app-services/triggers/database-triggers/" target="_self">
<span>
Atlas Database Triggers
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
When an update occurs in one collection, triggers automatically
update another collection.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Low to moderate, with potential delays in processing triggered
events
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Your application can tolerate reading slightly stale data. Users
can potentially see outdated data if they run a query immediately
after an update, but before the trigger finishes updating the
second collection.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
The best way to enforce data consistency depends on your
application. To learn more about the benefits and implementation
for each approach, refer to the corresponding documentation pages.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Tasks
<a class="headerlink leafygreen-ui-1kepx47" href="#tasks" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="tasks">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To enforce data consistency in your application, see the following
pages:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/data-modeling/enforce-consistency/transactions/#std-label-enforce-consistency-transactions">
Enforce Data Consistency with Transactions
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/data-modeling/enforce-consistency/embed-data/#std-label-enforce-consistency-embedding">
Enforce Data Consistency with Embedding
</a>
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Details
<a class="headerlink leafygreen-ui-1kepx47" href="#details" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="details">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following factors can affect how you enforce data consistency.
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Data Staleness
<a class="headerlink leafygreen-ui-1kepx47" href="#data-staleness" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="data-staleness">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Consider how important it is that your application returns the most
up-to-date data. Some applications can return data that is minutes or
hours stale with no impact to the user.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, in an e-commerce application, a user needs to know
immediately whether or not an item is available. This information is
ideally kept as consistent as possible, even if it requires frequent
updates.
</p>
<p class="leafygreen-ui-1kp3ins">
In contrast, analytic queries are typically expected to read slightly
stale data. It is not critical to keep analytic data completely
consistent.
</p>
<p class="leafygreen-ui-1kp3ins">
Your application's tolerance for stale data affects how to best keep
data consistent. Frequently updating data in multiple collections
reduces the risk that a user reads stale data. However, frequent updates
can negatively impact your application's performance. When you enforce
data consistency, balance user needs with performance impact.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Referential Integrity
<a class="headerlink leafygreen-ui-1kepx47" href="#referential-integrity" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="referential-integrity">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Referential integrity ensures that when an object is deleted, all
references to that object are also deleted.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, an application has a
<code class="leafygreen-ui-1l06pbn">
products
</code>
collection and a
<code class="leafygreen-ui-1l06pbn">
warehouse
</code>
collection that contains references to the
<code class="leafygreen-ui-1l06pbn">
products
</code>
collection. When a product is deleted from the
<code class="leafygreen-ui-1l06pbn">
products
</code>
collection,
the corresponding reference in the
<code class="leafygreen-ui-1l06pbn">
warehouse
</code>
collection should also
be deleted.
</p>
<p class="leafygreen-ui-1kp3ins">
If your schema requires referential integrity, incorporate logic into
your application to keep references consistent. At minimum, your
application logic should prevent errors when attempting to query a
reference that does not exist.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Learn More
<a class="headerlink leafygreen-ui-1kepx47" href="#learn-more" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="learn-more">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/schema-validation/#std-label-schema-validation-overview">
Schema Validation
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/model-data-for-atomic-operations/#std-label-data-modeling-atomic-operation">
Model Data for Atomic Operations
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions-production-consideration/#std-label-production-considerations">
Production Considerations for Transactions
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/sh.startBalancer/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
sh.startBalancer()
<a class="headerlink leafygreen-ui-1kepx47" href="#sh.startbalancer--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sh.startbalancer--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
sh.startBalancer(timeout, interval)
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-sh.startBalancer" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-sh.startBalancer">
</div>
</a>
</dt>
<dd>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
6.1
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
Starts the balancer in a sharded cluster.
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0.3, automatic chunk splitting is not performed.
This is because of balancing policy improvements. Auto-splitting commands
still exist, but do not perform an operation.
</p>
<p class="leafygreen-ui-1kp3ins">
In MongoDB versions earlier than 6.1,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-sh.startBalancer" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
sh.startBalancer()
</code>
</span>
</a>
also enables auto-splitting for the sharded cluster.
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
mongosh Method
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This page documents a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
method. This is
<em>
not
</em>
the documentation for database commands or language-specific drivers,
such as Node.js.
</p>
<p class="leafygreen-ui-1kp3ins">
For the database command, see the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/balancerStart/#mongodb-dbcommand-dbcmd.balancerStart">
<code class="leafygreen-ui-1l06pbn">
balancerStart
</code>
</a>
command
<!-- -->
.
</p>
<p class="leafygreen-ui-1kp3ins">
For MongoDB API drivers, refer to the language-specific
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
MongoDB driver documentation
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The method can take the following options:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Parameter
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
timeout
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. Time limit for enabling the balancer.
</p>
<p class="leafygreen-ui-1kp3ins">
Defaults to 60000 milliseconds.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
interval
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Optional. The frequency (in milliseconds) at which to check if a balancing
round has started.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
You can only run
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-sh.startBalancer" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
sh.startBalancer()
</code>
</span>
</a>
on a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
instance.
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-sh.startBalancer" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
sh.startBalancer()
</code>
</span>
</a>
errors
if run on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instance.
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
shell method
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-sh.startBalancer" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
sh.startBalancer()
</code>
</span>
</a>
is a wrapper around the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/balancerStart/#mongodb-dbcommand-dbcmd.balancerStart">
<code class="leafygreen-ui-1l06pbn">
balancerStart
</code>
</a>
command. As such,
the method does not wait for balancing to start.
</p>
<p class="leafygreen-ui-1kp3ins">
In earlier versions, the method waited for the balancing to start.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.enableBalancing/#mongodb-method-sh.enableBalancing">
<code class="leafygreen-ui-1l06pbn">
sh.enableBalancing()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.disableBalancing/#mongodb-method-sh.disableBalancing">
<code class="leafygreen-ui-1l06pbn">
sh.disableBalancing()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.getBalancerState/#mongodb-method-sh.getBalancerState">
<code class="leafygreen-ui-1l06pbn">
sh.getBalancerState()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.isBalancerRunning/#mongodb-method-sh.isBalancerRunning">
<code class="leafygreen-ui-1l06pbn">
sh.isBalancerRunning()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.setBalancerState/#mongodb-method-sh.setBalancerState">
<code class="leafygreen-ui-1l06pbn">
sh.setBalancerState()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.stopBalancer/#mongodb-method-sh.stopBalancer">
<code class="leafygreen-ui-1l06pbn">
sh.stopBalancer()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.waitForBalancer/#mongodb-method-sh.waitForBalancer">
<code class="leafygreen-ui-1l06pbn">
sh.waitForBalancer()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.waitForBalancerOff/#mongodb-method-sh.waitForBalancerOff">
<code class="leafygreen-ui-1l06pbn">
sh.waitForBalancerOff()
</code>
</a>
</p>
</li>
</ul>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/db.collection.isCapped/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
db.collection.isCapped()
<a class="headerlink leafygreen-ui-1kepx47" href="#db.collection.iscapped--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="db.collection.iscapped--">
</div>
</a>
</h1>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
db.collection.isCapped()
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-db.collection.isCapped" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-db.collection.isCapped">
</div>
</a>
</dt>
<dd>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
mongosh Method
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This page documents a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
method. This is
<em>
not
</em>
the documentation for database commands or language-specific drivers,
such as Node.js.
</p>
<p class="leafygreen-ui-1kp3ins">
For the database command, see the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collStats/#mongodb-data-collStats.capped">
<code class="leafygreen-ui-1l06pbn">
capped
</code>
</a>
field returned by the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collStats/#mongodb-dbcommand-dbcmd.collStats">
<code class="leafygreen-ui-1l06pbn">
collStats
</code>
</a>
command
<!-- -->
.
</p>
<p class="leafygreen-ui-1kp3ins">
For MongoDB API drivers, refer to the language-specific
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
MongoDB driver documentation
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<table class="css-11h39yh e1nex8bq0">
<colgroup>
<col class="field-name"/>
<col class="field-body"/>
</colgroup>
<tbody>
<tr class="css-x8snli">
<th>
Returns
<!-- -->
:
</th>
<td>
Returns
<code class="leafygreen-ui-1l06pbn">
true
</code>
if the collection is a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-capped-collection">
capped collection
</a>
, otherwise returns
<code class="leafygreen-ui-1l06pbn">
false
</code>
.
</td>
</tr>
</tbody>
</table>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/capped-collections/">
Capped Collections
</a>
</p>
</div>
</div>
</dd>
</dl>
</section>
|
https://www.mongodb.com/docs/manual/tutorial/evaluate-operation-performance/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Analyze Query Performance
<a class="headerlink leafygreen-ui-1kepx47" href="#analyze-query-performance" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="analyze-query-performance">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#identify-slow-queries" target="_self">
<span>
Identify Slow Queries
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#performance-overview" target="_self">
<span>
Performance Overview
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#analyze-a-slow-query" target="_self">
<span>
Analyze a Slow Query
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#perform-advanced-query-analysis" target="_self">
<span>
Perform Advanced Query Analysis
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
MongoDB provides several ways to examine the performance of your
workload, allowing you to understand query performance and identify
long-running queries. Understanding query performance helps you build
effective indexes and ensure your application runs critical queries
efficiently.
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Identify Slow Queries
<a class="headerlink leafygreen-ui-1kepx47" href="#identify-slow-queries" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="identify-slow-queries">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Use the following methods to identify slow queries that occur on your
deployment.
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Performance Overview
<a class="headerlink leafygreen-ui-1kepx47" href="#performance-overview" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="performance-overview">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following methods provide overviews of your deployment's
performance. Use these methods to determine if there are performance
issues that need to be addressed:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:10%"/>
<col style="width:20%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Method
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Availability
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Use the Atlas Performance Advisor
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
M10+ Atlas clusters
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The Atlas Performance Advisor monitors slow queries and suggests
new indexes to improve performance. For more information, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/performance-advisor/#std-label-performance-advisor" target="_self">
<span>
Monitor and Improve Slow Queries
<!-- -->
.
</span>
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Check ongoing operations in Atlas
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
M10+ Atlas clusters
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
You can use the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/real-time-performance-panel/#std-label-real-time-metrics-status-tab" target="_self">
<span>
Atlas Real-Time Performance Panel
</span>
</a>
(RTPP) to see current network
traffic, database operations, and hardware statistics.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Check ongoing operations locally
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Atlas clusters and self-hosted deployments
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/currentOp/#mongodb-pipeline-pipe.-currentOp">
<code class="leafygreen-ui-1l06pbn">
$currentOp
</code>
</a>
aggregation stage returns information
on active operations and cursors. Use
<code class="leafygreen-ui-1l06pbn">
$currentOp
</code>
to identify
long-running or stuck operations that may be negatively impacting
performance.
</p>
<p class="leafygreen-ui-1kp3ins">
You can also use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/top/#mongodb-dbcommand-dbcmd.top">
<code class="leafygreen-ui-1l06pbn">
top
</code>
</a>
command to get additional
operation count and latency statistics..
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Check server metrics
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Atlas clusters and self-hosted deployments
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
For Atlas clusters, you can
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/monitor-cluster-metrics/#std-label-monitor-cluster-metrics" target="_self">
<span>
view cluster metrics
</span>
</a>
to identify performance issues.
</p>
<p class="leafygreen-ui-1kp3ins">
For self-hosted deployments, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/serverStatus/#mongodb-dbcommand-dbcmd.serverStatus">
<code class="leafygreen-ui-1l06pbn">
serverStatus
</code>
</a>
command provides metrics that can indicate poor performance and
anomalies for query execution.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
View common query shapes
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Atlas clusters and self-hosted deployments
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/queryStats/#mongodb-pipeline-pipe.-queryStats">
<code class="leafygreen-ui-1l06pbn">
$queryStats
</code>
</a>
aggregation stage returns information
about common
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-shapes/#std-label-query-shapes">
query shapes
</a>
.
<code class="leafygreen-ui-1l06pbn">
$queryStats
</code>
provides a holistic
view of the kinds of queries being run on your deployment.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
View index statistics
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Atlas clusters and self-hosted deployments
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/indexStats/#mongodb-pipeline-pipe.-indexStats">
<code class="leafygreen-ui-1l06pbn">
$indexStats
</code>
</a>
aggregation stage returns information
about your collection's indexes and how often individual indexes
are used. Use
<code class="leafygreen-ui-1l06pbn">
$indexStats
</code>
to identify unused indexes that can
be removed to improve write performance.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Analyze a Slow Query
<a class="headerlink leafygreen-ui-1kepx47" href="#analyze-a-slow-query" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="analyze-a-slow-query">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Use these methods to analyze a slow query and determine the cause of
poor performance:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:10%"/>
<col style="width:20%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Method
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Availability
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Use the Atlas Query Profiler
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
M10+ Atlas clusters
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The Atlas Query Profiler shows long-running operations and
performance statistics. For more information, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/tutorial/profile-database/#std-label-profile-database" target="_self">
<span>
Monitor Query Performance
<!-- -->
.
</span>
</a>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Enable the Database Profiler
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Atlas clusters and self-hosted deployments
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
When enabled, the database profiler stores information about slow
queries in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection.
</p>
<p class="leafygreen-ui-1kp3ins">
For more information, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/manage-the-database-profiler/#std-label-database-profiler">
Database Profiler
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
View slow queries in the diagnostic log
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Atlas clusters and self-hosted deployments
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
MongoDB logs queries that exceed the slow operation threshold
(default 100 milliseconds) in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/log-messages/#std-label-log-messages-ref">
diagnostic logs
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
Check the diagnostic logs to identify problematic queries and see
which queries would benefit from indexes.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
View explain results
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Atlas clusters and self-hosted deployments
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Query explain results show information on the query plan and
execution statistics. You can use explain results to determine
the following information about a query:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The amount of time a query took to execute
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Whether the query used an index
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The number of documents and index keys scanned to fulfill a
query
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
To view explain results, use the following methods:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.explain/#mongodb-method-db.collection.explain">
<code class="leafygreen-ui-1l06pbn">
db.collection.explain()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.explain/#mongodb-method-cursor.explain">
<code class="leafygreen-ui-1l06pbn">
explain()
</code>
</a>
cursor method
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
To learn about explain results output, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#std-label-explain-results">
Explain Results
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/analyze-query-plan/#std-label-interpret-explain-plan">
Interpret Explain Plan Results
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Perform Advanced Query Analysis
<a class="headerlink leafygreen-ui-1kepx47" href="#perform-advanced-query-analysis" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="perform-advanced-query-analysis">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following methods are suited for deeper investigation of problematic
queries, and can provide fine-grained performance insights:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:10%"/>
<col style="width:20%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Method
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Availability
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
View plan cache statistics
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Atlas clusters and self-hosted deployments
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/planCacheStats/#mongodb-pipeline-pipe.-planCacheStats">
<code class="leafygreen-ui-1l06pbn">
$planCacheStats
</code>
</a>
aggregation stage returns
information about a collection's
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-plans/#std-label-query-plans-query-optimization">
plan cache
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The plan cache contains query plans that the query planner uses
to efficiently complete queries. Generally, the plan cache should
contain entries for your most commonly-run queries.
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/clustered-collections/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Clustered Collections
<a class="headerlink leafygreen-ui-1kepx47" href="#clustered-collections" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="clustered-collections">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#benefits" target="_self">
<span>
Benefits
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#limitations" target="_self">
<span>
Limitations
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#set-your-own-clustered-index-key-values" target="_self">
<span>
Set Your Own Clustered Index Key Values
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
5.3
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
Clustered collections store indexed documents in the same
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/wiredtiger/#std-label-storage-wiredtiger">
WiredTiger
</a>
file as the index specification.
Storing the collection's documents and index in the same file provides
benefits for storage and performance compared to regular indexes.
</p>
<p class="leafygreen-ui-1kp3ins">
Clustered collections are created with a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.createCollection/#std-label-db.createCollection.clusteredIndex">
clustered index
</a>
. The clustered index specifies the
order in which documents are stored.
</p>
<p class="leafygreen-ui-1kp3ins">
To create a clustered collection, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-clustered-collections-examples" target="_self">
<span>
Examples
<!-- -->
.
</span>
</a>
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
Backward-Incompatible Feature
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
You must drop clustered collections before you can downgrade to
a version of MongoDB earlier than 5.3.
</p>
</div>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Benefits
<a class="headerlink leafygreen-ui-1kepx47" href="#benefits" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="benefits">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Clustered collections have the following benefits compared to
non-clustered collections:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Faster queries on clustered collections without needing a secondary
index, such as queries with range scans and equality comparisons on
the clustered index key.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Clustered collections have a lower storage size, which improves
performance for queries and bulk inserts.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Clustered collections can eliminate the need for a secondary
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-properties/#std-label-ttl-index">
TTL
(Time To Live) index
<!-- -->
.
</a>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A clustered index is also a TTL index if you specify the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.createCollection/#std-label-db.createCollection.expireAfterSeconds">
expireAfterSeconds
</a>
field.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
To be used as a TTL index, the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field must be a supported
date type. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-ttl/#std-label-index-feature-ttl">
TTL Indexes
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If you use a clustered index as a TTL index, it improves document
delete performance and reduces the clustered collection storage
size.
</p>
</li>
</ul>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Clustered collections have additional performance improvements for
inserts, updates, deletes, and queries.
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
All collections have an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/indexes/#std-label-index-type-id">
_id index
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A non-clustered collection stores the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
index separately from
the documents. This requires two writes for inserts, updates, and
deletes, and two reads for queries.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A clustered collection stores the index and the documents together
in
<code class="leafygreen-ui-1l06pbn">
_id
</code>
value order. This requires one write for inserts,
updates, and deletes, and one read for queries.
</p>
</li>
</ul>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Clustered collections store documents ordered by the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.createCollection/#std-label-db.createCollection.clusteredIndex">
clustered
index
</a>
key value. The clustered
index key must be
<code class="leafygreen-ui-1l06pbn">
{ _id: 1 }
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
You can only have one clustered index in a collection because the
documents can be stored in only one order. Only collections with a
clustered index store the data in sorted order.
</p>
<p class="leafygreen-ui-1kp3ins">
You can have a clustered index and add
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-secondary-index">
secondary indexes
</a>
to a clustered collection. Clustered indexes differ
from secondary indexes:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A clustered index can only be created when you create the collection.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The clustered index keys are stored with the collection. The
collection size returned by the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collStats/#mongodb-dbcommand-dbcmd.collStats">
<code class="leafygreen-ui-1l06pbn">
collStats
</code>
</a>
command
includes the clustered index size.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0.7, if a usable clustered index exists, the MongoDB
query planner evaluates the clustered index against secondary indexes in
the query planning process. When a query uses a clustered index, MongoDB
performs a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-bounded-collection-scan">
bounded collection scan
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
Prior to MongoDB 6.0.7, if a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-secondary-index">
secondary index
</a>
existed on a clustered collection and the secondary index was usable by
your query, the query planner selected the secondary index instead of the
clustered index by default. In MongoDB 6.1 and prior, to use the
clustered index, you must provide a hint because the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-plans/">
query
optimizer
</a>
does not automatically select the
clustered index.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Limitations
<a class="headerlink leafygreen-ui-1kepx47" href="#limitations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="limitations">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Clustered collection limitations:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The clustered index key must be
<code class="leafygreen-ui-1l06pbn">
{ _id: 1 }
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You cannot transform a non-clustered collection to a clustered
collection, or the reverse. Instead, you can:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Read documents from one collection and write them to another
collection using an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/aggregation/#std-label-aggregation-pipeline-intro">
aggregation pipeline
</a>
with an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/out/#mongodb-pipeline-pipe.-out">
<code class="leafygreen-ui-1l06pbn">
$out
</code>
</a>
stage or
a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/merge/#mongodb-pipeline-pipe.-merge">
<code class="leafygreen-ui-1l06pbn">
$merge
</code>
</a>
stage.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Export collection data with
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/database-tools/mongodump/#mongodb-binary-bin.mongodump" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongodump
</code>
</span>
</a>
and import the
data into another collection with
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/database-tools/mongorestore/#mongodb-binary-bin.mongorestore" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongorestore
</code>
.
</span>
</a>
</p>
</li>
</ul>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You cannot hide a clustered index. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-hidden/">
Hidden indexes
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If there are secondary indexes for the clustered collection, the
collection has a larger storage size. This is because secondary
indexes on a clustered collection with large clustered index keys may
have a larger storage size than secondary indexes on a non-clustered
collection.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Clustered collections may not be
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/capped-collections/#std-label-manual-capped-collection">
capped collections
<!-- -->
.
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-clustered-collections-clustered-index-key-values">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Set Your Own Clustered Index Key Values
<a class="headerlink leafygreen-ui-1kepx47" href="#set-your-own-clustered-index-key-values" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="set-your-own-clustered-index-key-values">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
By default, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.createCollection/#std-label-db.createCollection.clusteredIndex">
clustered index
</a>
key values are the unique document
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-objectid">
object identifiers
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
You can set your own clustered index key values. Your key:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Must contain unique values.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Must be immutable.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Should contain sequentially increasing values. This is not a
requirement but improves insert performance.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Should be as small in size as possible.
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A clustered index supports keys up to 8 MB in size, but a much
smaller clustered index key is best.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A large clustered index key causes the clustered collection to
increase in size and secondary indexes are also larger. This reduces
the performance and storage benefits of the clustered collection.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Secondary indexes on clustered collections with large clustered
index keys may use more space compared to secondary indexes on
non-clustered collections.
</p>
</li>
</ul>
</li>
</ul>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Randomly generated key values may decrease a clustered collection's
performance.
</p>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-clustered-collections-examples">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This section shows clustered collection examples.
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
Create
</code>
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#create-example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="create-example">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/create/#mongodb-dbcommand-dbcmd.create">
<code class="leafygreen-ui-1l06pbn">
create
</code>
</a>
example adds a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-clustered-collections" target="_self">
<span>
clustered
collection
</span>
</a>
named
<code class="leafygreen-ui-1l06pbn">
products
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand( {\n create: \"products\",\n clusteredIndex: { \"key\": { _id: 1 }, \"unique\": true, \"name\": \"products clustered key\" }\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">create</span>: <span class="lg-highlight-string">"products"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">clusteredIndex</span>: <!-- -->{ <span class="lg-highlight-string">"key"</span>: <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span> }<!-- -->, <span class="lg-highlight-string">"unique"</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-string">"name"</span>: <span class="lg-highlight-string">"products clustered key"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
In the example,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/create/#std-label-create.clusteredIndex">
clusteredIndex
</a>
specifies:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"key": { _id: 1 }
</code>
, which sets the clustered index key to the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"unique": true
</code>
, which indicates the clustered index key value must
be unique.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"name": "products clustered key"
</code>
, which sets the clustered index name.
</p>
</li>
</ul>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
db.createCollection
</code>
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#db.createcollection-example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="db.createcollection-example">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.createCollection/#mongodb-method-db.createCollection">
<code class="leafygreen-ui-1l06pbn">
db.createCollection()
</code>
</a>
example adds a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-clustered-collections" target="_self">
<span>
clustered collection
</span>
</a>
named
<code class="leafygreen-ui-1l06pbn">
stocks
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.createCollection(\n \"stocks\",\n { clusteredIndex: { \"key\": { _id: 1 }, \"unique\": true, \"name\": \"stocks clustered key\" } }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">createCollection</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"stocks"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">clusteredIndex</span>: <!-- -->{ <span class="lg-highlight-string">"key"</span>: <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span> }<!-- -->, <span class="lg-highlight-string">"unique"</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-string">"name"</span>: <span class="lg-highlight-string">"stocks clustered key"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
In the example,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.createCollection/#std-label-db.createCollection.clusteredIndex">
clusteredIndex
</a>
specifies:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"key": { _id: 1 }
</code>
, which sets the clustered index key to the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"unique": true
</code>
, which indicates the clustered index key value must
be unique.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"name": "stocks clustered key"
</code>
, which sets the clustered index name.
</p>
</li>
</ul>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Date Clustered Index Key Example
<a class="headerlink leafygreen-ui-1kepx47" href="#date-clustered-index-key-example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="date-clustered-index-key-example">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/create/#mongodb-dbcommand-dbcmd.create">
<code class="leafygreen-ui-1l06pbn">
create
</code>
</a>
example adds a clustered collection
named
<code class="leafygreen-ui-1l06pbn">
orders
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.createCollection(\n \"orders\",\n { clusteredIndex: { \"key\": { _id: 1 }, \"unique\": true, \"name\": \"orders clustered key\" } }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">createCollection</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"orders"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">clusteredIndex</span>: <!-- -->{ <span class="lg-highlight-string">"key"</span>: <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span> }<!-- -->, <span class="lg-highlight-string">"unique"</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-string">"name"</span>: <span class="lg-highlight-string">"orders clustered key"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
In the example,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.createCollection/#std-label-db.createCollection.clusteredIndex">
clusteredIndex
</a>
specifies:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"key": { _id: 1 }
</code>
, which sets the clustered index key to the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"unique": true
</code>
, which indicates the clustered index key value must
be unique.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"name": "orders clustered key"
</code>
, which sets the clustered index name.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
The following example adds documents to the
<code class="leafygreen-ui-1l06pbn">
orders
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.orders.insertMany( [\n { _id: ISODate( \"2022-03-18T12:45:20Z\" ), \"quantity\": 50, \"totalOrderPrice\": 500 },\n { _id: ISODate( \"2022-03-18T12:47:00Z\" ), \"quantity\": 5, \"totalOrderPrice\": 50 },\n { _id: ISODate( \"2022-03-18T12:50:00Z\" ), \"quantity\": 1, \"totalOrderPrice\": 10 }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">orders</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>( <span class="lg-highlight-string">"2022-03-18T12:45:20Z"</span> )<!-- -->, <span class="lg-highlight-string">"quantity"</span>: <span class="lg-highlight-number">50</span>, <span class="lg-highlight-string">"totalOrderPrice"</span>: <span class="lg-highlight-number">500</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>( <span class="lg-highlight-string">"2022-03-18T12:47:00Z"</span> )<!-- -->, <span class="lg-highlight-string">"quantity"</span>: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"totalOrderPrice"</span>: <span class="lg-highlight-number">50</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>( <span class="lg-highlight-string">"2022-03-18T12:50:00Z"</span> )<!-- -->, <span class="lg-highlight-string">"quantity"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"totalOrderPrice"</span>: <span class="lg-highlight-number">10</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
_id
</code>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/create/#std-label-create.clusteredIndex">
clusteredIndex
</a>
key stores the
order date.
</p>
<p class="leafygreen-ui-1kp3ins">
If you use the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field in a range query, performance is improved.
For example, the following query uses
<code class="leafygreen-ui-1l06pbn">
_id
</code>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/gt/#mongodb-expression-exp.-gt">
<code class="leafygreen-ui-1l06pbn">
$gt
</code>
</a>
to
return the orders where the order date is greater than the supplied
date:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.orders.find( { _id: { $gt: ISODate( \"2022-03-18T12:47:00.000Z\" ) } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">orders</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">_id</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>( <span class="lg-highlight-string">"2022-03-18T12:47:00.000Z"</span> ) } } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Example output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n _id: ISODate( \"2022-03-18T12:50:00.000Z\" ),\n quantity: 1,\n totalOrderPrice: 10\n }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>( <span class="lg-highlight-string">"2022-03-18T12:50:00.000Z"</span> )<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">totalOrderPrice</span>: <span class="lg-highlight-number">10</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Determine if a Collection is Clustered
<a class="headerlink leafygreen-ui-1kepx47" href="#determine-if-a-collection-is-clustered" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="determine-if-a-collection-is-clustered">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To determine if a collection is clustered, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/listCollections/#mongodb-dbcommand-dbcmd.listCollections">
<code class="leafygreen-ui-1l06pbn">
listCollections
</code>
</a>
command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand( { listCollections: 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>( <!-- -->{ <span class="lg-highlight-attr">listCollections</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For clustered collections, you will see the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/create/#std-label-create.clusteredIndex">
clusteredIndex
</a>
details in the output. For example, the
following output shows the details for the
<code class="leafygreen-ui-1l06pbn">
orders
</code>
clustered
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"...\nname: 'orders',\ntype: 'collection',\noptions: {\n clusteredIndex: {\n v: 2,\n key: { _id: 1 },\n name: 'orders clustered key',\n unique: true\n }\n},\n...","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'orders'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'collection'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-attr">options</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">clusteredIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">v</span>: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">key</span>: <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'orders clustered key'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">unique</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">...</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
v
</code>
is the index version.
</p>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/aggregation/listSearchIndexes/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$listSearchIndexes (aggregation)
<a class="headerlink leafygreen-ui-1kepx47" href="#-listsearchindexes--aggregation-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-listsearchindexes--aggregation-">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#command-fields" target="_self">
<span>
Command Fields
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#access-control" target="_self">
<span>
Access Control
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#output" target="_self">
<span>
Output
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#index-status-details" target="_self">
<span>
Index Status Details
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#synonym-mapping-details" target="_self">
<span>
Synonym Mapping Details
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#atlas-search-index-statuses" target="_self">
<span>
Atlas Search Index Statuses
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#errors" target="_self">
<span>
Errors
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#return-all-search-indexes" target="_self">
<span>
Return All Search Indexes
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#return-a-single-search-index-by-name" target="_self">
<span>
Return a Single Search Index by Name
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#return-a-single-search-index-by-id" target="_self">
<span>
Return a Single Search Index by id
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#learn-more" target="_self">
<span>
Learn More
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="pipeline">
<dt>
<code class="leafygreen-ui-1l06pbn">
$listSearchIndexes
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-pipeline-pipe.-listSearchIndexes" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-pipeline-pipe.-listSearchIndexes">
</div>
</a>
</dt>
<dd>
</dd>
</dl>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
7.0
</em>
:
<!-- -->
<!-- -->
(
<em>
Also available starting in 6.0.7
</em>
)
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
Returns information about existing
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/atlas-search/atlas-search-overview/#fts-indexes" target="_self">
<span>
Atlas Search indexes
</span>
</a>
on a specified
collection.
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This command can only be run on a deployment hosted on
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/" target="_self">
<span>
MongoDB Atlas
</span>
</a>
, and is
<strong>
not supported
</strong>
in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/create-database-deployment/#std-label-atlas-choose-serverless" target="_self">
<span>
serverless instances
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Command syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.<collection>.aggregate(\n [\n {\n $listSearchIndexes:\n {\n id: <indexid>,\n name: <indexname>\n }\n }\n ]\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<!-- --><<!-- -->collection<!-- -->><!-- -->.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$listSearchIndexes</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">id</span>: <<!-- -->indexId<!-- -->><!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <<!-- -->indexName<!-- -->></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Command Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#command-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="command-fields">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
$listSearchIndexes
</code>
takes either of the following fields:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Necessity
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
id
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Optional
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The id of the index to return information about.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
name
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Optional
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The name of the index to return information about.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
You cannot specify both
<code class="leafygreen-ui-1l06pbn">
id
</code>
and
<code class="leafygreen-ui-1l06pbn">
name
</code>
. If you omit both the
<code class="leafygreen-ui-1l06pbn">
id
</code>
and
<code class="leafygreen-ui-1l06pbn">
name
</code>
fields,
<code class="leafygreen-ui-1l06pbn">
$listSearchIndexes
</code>
returns information about
all Atlas Search indexes on the collection.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Access Control
<a class="headerlink leafygreen-ui-1kepx47" href="#access-control" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="access-control">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
If your deployment enforces access control, the user running
<code class="leafygreen-ui-1l06pbn">
$listSearchIndexes
</code>
must have the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-listSearchIndexes">
<code class="leafygreen-ui-1l06pbn">
listSearchIndexes
</code>
</a>
privilege
action on the database or collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n resource: {\n db : <database>,\n collection: <collection>\n },\n actions: [ \"listSearchIndexes\" ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">resource</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->db <!-- -->: <<!-- -->database<!-- -->><!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">collection</span>: <<!-- -->collection<!-- -->></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">actions</span>: <!-- -->[ <span class="lg-highlight-string">"listSearchIndexes"</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The built-in
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/built-in-roles/#mongodb-authrole-read">
<code class="leafygreen-ui-1l06pbn">
read
</code>
</a>
role provides the the
<code class="leafygreen-ui-1l06pbn">
listSearchIndexes
</code>
privilege. The following example grants the
<code class="leafygreen-ui-1l06pbn">
read
</code>
role on the
<code class="leafygreen-ui-1l06pbn">
qa
</code>
database:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.grantRolesToUser(\n \"<user>\",\n [ { role: \"read\", db: \"qa\" } ]\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">grantRolesToUser</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"<user>"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">role</span>: <span class="lg-highlight-string">"read"</span>, <span class="lg-highlight-attr">db</span>: <span class="lg-highlight-string">"qa"</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Output
<a class="headerlink leafygreen-ui-1kepx47" href="#output" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="output">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
$listSearchIndexes
</code>
returns an array of documents. Each document in the array
contains the following fields:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:10%"/>
<col style="width:20%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
id
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Unique identifier for the index.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
name
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Name of the index.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
status
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Status of the index. For more information, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-search-index-status-aggregation" target="_self">
<span>
Atlas Search Index Statuses
</span>
</a>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
queryable
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Indicates whether the index is ready to be queried.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
latestDefinitionVersion
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Describes the version of the index.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
latestDefinitionVersion.version
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Version number associated with the index definition. When you
update an index definition, the version number increments
automatically.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
latestDefinitionVersion.createdAt
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
date
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Time when the current index definition was created.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
latestDefinition
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The most recent definition for the index. For more information,
see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/createSearchIndexes/#std-label-search-index-definition-create">
Search Index Definition Syntax
<!-- -->
.
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
statusDetail
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array of documents
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Contains the status of the index on each search host
(
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
).
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
statusDetail.[n].hostname
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Hostname of the corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
statusDetail.[n].status
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Status of the index on the corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
statusDetail.[n].queryable
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Indicates whether the index is ready to be queried on the
corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
statusDetail.[n].mainIndex
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Contains status information about the active index on the
corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
For details, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-search-index-details-aggregation" target="_self">
<span>
Index Status Details
</span>
</a>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
statusDetail.[n].stagedIndex
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Contains status information about an index being built in the
background on the corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
. This field only
appears if you are building a new index to update an existing
active index.
</p>
<p class="leafygreen-ui-1kp3ins">
For details, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-search-index-details-aggregation" target="_self">
<span>
Index Status Details
</span>
</a>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
synonymMappingStatus
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Status of the index's
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/atlas-search/synonyms/#std-label-synonyms-ref" target="_self">
<span>
synonym mappings
</span>
</a>
.
This field only appears if the index has synonyms defined. Can be
one of the following values:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
BUILDING
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
FAILED
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
READY
</code>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
The returned status is a summary of the synonym mappings on each
individual
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
synonymMappingStatusDetail
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array of documents
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Contains the status of the index's synonym mappings on each
search host (
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
). This field (and its subfields) only
appear if the index has synonyms defined.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
synonymMappingStatusDetail.[n].status
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Status for the corresponding synonym mapping across all
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
processes.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
synonymMappingStatusDetail.[n].queryable
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Indicates whether the corresponding synonym mapping can support
queries across all
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
processes.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
message
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Describes an error for the synonym mapping, if applicable. Only
appears if the
<code class="leafygreen-ui-1l06pbn">
status
</code>
for this synonym mapping is
<code class="leafygreen-ui-1l06pbn">
FAILED
</code>
.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-search-index-details-aggregation">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Index Status Details
<a class="headerlink leafygreen-ui-1kepx47" href="#index-status-details" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="index-status-details">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following table describes the embedded fields of the following
documents:
-
<code class="leafygreen-ui-1l06pbn">
statusDetail.[mongot].mainIndex
</code>
-
<code class="leafygreen-ui-1l06pbn">
statusDetail.[mongot].stagedIndex
</code>
</p>
<p class="leafygreen-ui-1kp3ins">
The fields describe the index status on a specific
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:10%"/>
<col style="width:30%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
status
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The state of the index generation on the corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
queryable
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Indicates whether the index generation is ready to be queried on
the corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
synonymMappingStatus
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The state of the index generation's synonym mappings on the
corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
. Only present if the index has synonyms
defined.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
synonymMappingStatusDetails
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Contains the status of the index's synonym mappings on the
corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
. This field (and its subfields) only
appear if the index has synonyms defined.
</p>
<p class="leafygreen-ui-1kp3ins">
For more information, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-search-mapping-details-aggregation" target="_self">
<span>
Synonym Mapping Details
</span>
</a>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
definitionVersion
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Describes the index definition version that this index generation
is being built with.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
definitionVersion.version
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Version number that the index generation is using on the
corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
. When you update an index definition,
the updated index builds with an incremented version number.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
definitionVersion.createdAt
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
date
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Time when the index definition was created.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
definition
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The definition that this index is being built with.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-search-mapping-details-aggregation">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Synonym Mapping Details
<a class="headerlink leafygreen-ui-1kepx47" href="#synonym-mapping-details" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="synonym-mapping-details">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following table describes the embedded fields of the following
objects:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
statusDetail.mainIndex.synonymMappingStatusDetails.<synonymMapping>
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
statusDetail.stagedIndex.synonymMappingStatusDetails<synonymMapping>
</code>
</p>
</li>
</ul>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:10%"/>
<col style="width:30%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
status
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Status for the synonym mapping across on the corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
process.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
queryable
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Indicates whether the synonym mapping can support queries on the
corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
process.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
message
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Describes an error for the synonym mapping, if applicable. Only
appears if the
<code class="leafygreen-ui-1l06pbn">
status
</code>
for this synonym mapping is
<code class="leafygreen-ui-1l06pbn">
FAILED
</code>
.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-search-index-status-aggregation">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Atlas Search Index Statuses
<a class="headerlink leafygreen-ui-1kepx47" href="#atlas-search-index-statuses" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="atlas-search-index-statuses">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
status
</code>
field in the
<code class="leafygreen-ui-1l06pbn">
$listSearchIndexes
</code>
output can be one of the
following:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:30%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Status
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
BUILDING
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The following scenarios can cause an index to be in the
<code class="leafygreen-ui-1l06pbn">
BUILDING
</code>
state:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Atlas is building the index or re-building the index after an
edit.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Atlas Search cannot keep up with indexing changes to the
collection. In this case, Atlas rebuilds the index in the
background.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
When the index is in the
<code class="leafygreen-ui-1l06pbn">
BUILDING
</code>
state:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
For a new index, Atlas Search cannot use the index for queries
until the index build is complete.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
For an existing index, Atlas Search uses the old index
definition for queries until the index rebuild is complete.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
An index in the
<code class="leafygreen-ui-1l06pbn">
BUILDING
</code>
state may be queryable or
non-queryable.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
DOES_NOT_EXIST
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The index does not exist.
</p>
<p class="leafygreen-ui-1kp3ins">
An index in the
<code class="leafygreen-ui-1l06pbn">
DOES_NOT_EXIST
</code>
state is always non-queryable.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
DELETING
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Atlas is deleting the index.
</p>
<p class="leafygreen-ui-1kp3ins">
An index in the
<code class="leafygreen-ui-1l06pbn">
DELETING
</code>
state is always non-queryable.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
FAILED
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The index build failed. Indexes can enter the
<code class="leafygreen-ui-1l06pbn">
FAILED
</code>
state
due to an invalid index definition.
</p>
<p class="leafygreen-ui-1kp3ins">
An index in the
<code class="leafygreen-ui-1l06pbn">
FAILED
</code>
state may be queryable or
non-queryable.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
PENDING
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Atlas has not yet started building the index.
</p>
<p class="leafygreen-ui-1kp3ins">
An index in the
<code class="leafygreen-ui-1l06pbn">
PENDING
</code>
state is always non-queryable.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
READY
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The index is ready and can support queries.
</p>
<p class="leafygreen-ui-1kp3ins">
An index in the
<code class="leafygreen-ui-1l06pbn">
READY
</code>
state is always queryable.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
STALE
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The index is queryable but has stopped replicating data from the
indexed collection. Searches on the index may return out-of-date
data.
</p>
<p class="leafygreen-ui-1kp3ins">
Indexes can enter the
<code class="leafygreen-ui-1l06pbn">
STALE
</code>
state due to replication errors.
</p>
<p class="leafygreen-ui-1kp3ins">
An index in the
<code class="leafygreen-ui-1l06pbn">
STALE
</code>
state is always queryable.
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Errors
<a class="headerlink leafygreen-ui-1kepx47" href="#errors" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="errors">
</div>
</a>
</h3>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
7.1
</em>
:
<!-- -->
This command throws an error when not executed on Atlas.
</p>
<div class="css-1f5771r">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.names.aggregate( [\n { $listSearchIndexes: { } }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">names</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$listSearchIndexes</span>: <!-- -->{ <!-- -->} }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<div class="css-9st569 efa38qy0" style="--border-color:#E8EDEB">
<button aria-disabled="false" class="lg-ui-button-0000 leafygreen-ui-hix6y6" data-lgid="lg-button" role="button" type="button">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg alt="" aria-hidden="true" class="leafygreen-ui-hjnzs9" fill="none" height="16" role="presentation" viewbox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg">
<path clip-rule="evenodd" d="M14.364 10.778a1 1 0 0 0 0-1.414l-4.95-4.95-.707-.707a1 1 0 0 0-1.414 0l-.707.707-4.95 4.95a1 1 0 0 0 0 1.414l.707.707a1 1 0 0 0 1.414 0L8 7.243l4.243 4.242a1 1 0 0 0 1.414 0l.707-.707Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
HIDE OUTPUT
</div>
</button>
</div>
<div class="leafygreen-ui-1oteowz">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"MongoServerError: PlanExecutor error during aggregation :: caused by :: Search index commands are only supported with Atlas."}
</script>
<div class="css-1sax7hu e11q6jfk0" style="--code-container-border:initial;--code-pre-border:none">
<div class="leafygreen-ui-1fyvhqe">
<div class="leafygreen-ui-1ij019s">
<pre class="leafygreen-ui-1qhgg7e" tabindex="0"><code class="lg-highlight-hljs-dark none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">MongoServerError: PlanExecutor error during aggregation :: caused by :: Search index commands are only supported with Atlas.</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
In previous releases, this command returns an empty result when not executed
on Atlas.
</p>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
These examples demonstrate how to:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-listSearchIndexes-examples-return-all" target="_self">
<span>
Return All Search Indexes
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-listSearchIndexes-examples-return-by-name" target="_self">
<span>
Return a Single Search Index by Name
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-listSearchIndexes-examples-return-by-id" target="_self">
<span>
Return a Single Search Index by id
</span>
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-listSearchIndexes-examples-return-all">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Return All Search Indexes
<a class="headerlink leafygreen-ui-1kepx47" href="#return-all-search-indexes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="return-all-search-indexes">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following example returns all Atlas Search indexes on the
<code class="leafygreen-ui-1l06pbn">
movies
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.movies.aggregate(\n [\n {\n $listSearchIndexes: { }\n }\n ]\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">movies</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$listSearchIndexes</span>: <!-- -->{ <!-- -->}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Sample output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n id: '6524096020da840844a4c4a7',\n name: 'default',\n status: 'BUILDING',\n queryable: true,\n latestDefinitionVersion: {\n version: 2,\n createdAt: ISODate(\"2023-10-09T14:51:57.355Z\")\n },\n latestDefinition: {\n mappings: { dynamic: true },\n storedSource: { include: [ 'awards.text' ] }\n },\n statusDetail: [\n {\n hostname: 'atlas-n1cm1j-shard-00-02',\n status: 'BUILDING',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:08:32.000Z\")\n },\n definition: { mappings: { dynamic: true, fields: {} } }\n },\n stagedIndex: {\n status: 'PENDING',\n queryable: false,\n definitionVersion: {\n version: 1,\n createdAt: ISODate(\"2023-10-09T14:51:29.000Z\")\n },\n definition: {\n mappings: { dynamic: true, fields: {} },\n storedSource: true\n }\n }\n },\n {\n hostname: 'atlas-n1cm1j-shard-00-01',\n status: 'BUILDING',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:08:32.000Z\")\n },\n definition: { mappings: { dynamic: true, fields: {} } }\n },\n stagedIndex: {\n status: 'PENDING',\n queryable: false,\n definitionVersion: {\n version: 1,\n createdAt: ISODate(\"2023-10-09T14:51:29.000Z\")\n },\n definition: {\n mappings: { dynamic: true, fields: {} },\n storedSource: true\n }\n }\n },\n {\n hostname: 'atlas-n1cm1j-shard-00-00',\n status: 'BUILDING',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:08:32.000Z\")\n },\n definition: { mappings: { dynamic: true, fields: {} } }\n }\n }\n ]\n },\n {\n id: '65240be420da840844a4d077',\n name: 'synonym_mappings',\n status: 'READY',\n queryable: true,\n latestDefinitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.305Z\")\n },\n latestDefinition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: { type: 'string' }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ],\n statusDetail: [\n {\n hostname: 'atlas-n1cm1j-shard-00-02',\n status: 'READY',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.000Z\")\n },\n definition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: {\n type: 'string',\n indexOptions: 'offsets',\n store: true,\n norms: 'include'\n }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ]\n }\n },\n {\n hostname: 'atlas-n1cm1j-shard-00-01',\n status: 'READY',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.000Z\")\n },\n definition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: {\n type: 'string',\n indexOptions: 'offsets',\n store: true,\n norms: 'include'\n }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ]\n }\n },\n {\n hostname: 'atlas-n1cm1j-shard-00-00',\n status: 'READY',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.000Z\")\n },\n definition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: {\n type: 'string',\n indexOptions: 'offsets',\n store: true,\n norms: 'include'\n }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ]\n }\n }\n ]\n }\n]","programmingLanguage":"JavaScript"}
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<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">id</span>: <span class="lg-highlight-string">'6524096020da840844a4c4a7'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'default'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'BUILDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">latestDefinitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:51:57.355Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">latestDefinition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">storedSource</span>: <!-- -->{ <span class="lg-highlight-attr">include</span>: <!-- -->[ <span class="lg-highlight-string">'awards.text'</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">statusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-02'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'BUILDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:08:32.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{ <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">stagedIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'PENDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">false</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:51:29.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">storedSource</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-01'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'BUILDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:08:32.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{ <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">stagedIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'PENDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">false</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:51:29.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">storedSource</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-00'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'BUILDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:08:32.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{ <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">id</span>: <span class="lg-highlight-string">'65240be420da840844a4d077'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mappings'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">latestDefinitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.305Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">latestDefinition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{ <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">statusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-02'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">indexOptions</span>: <span class="lg-highlight-string">'offsets'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">store</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">norms</span>: <span class="lg-highlight-string">'include'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-01'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">indexOptions</span>: <span class="lg-highlight-string">'offsets'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">store</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">norms</span>: <span class="lg-highlight-string">'include'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-00'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">indexOptions</span>: <span class="lg-highlight-string">'offsets'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">store</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">norms</span>: <span class="lg-highlight-string">'include'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-listSearchIndexes-examples-return-by-name">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Return a Single Search Index by Name
<a class="headerlink leafygreen-ui-1kepx47" href="#return-a-single-search-index-by-name" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="return-a-single-search-index-by-name">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following example returns the index named
<code class="leafygreen-ui-1l06pbn">
synonym-mappings
</code>
on
the
<code class="leafygreen-ui-1l06pbn">
movies
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.movies.aggregate(\n [\n {\n $listSearchIndexes:\n {\n name: \"synonym-mappings\"\n }\n }\n ]\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">movies</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$listSearchIndexes</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"synonym-mappings"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Sample output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n id: '65240be420da840844a4d077',\n name: 'synonym_mappings',\n status: 'READY',\n queryable: true,\n latestDefinitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.305Z\")\n },\n latestDefinition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: { type: 'string' }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ],\n statusDetail: [\n {\n hostname: 'atlas-n1cm1j-shard-00-02',\n status: 'READY',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.000Z\")\n },\n definition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: {\n type: 'string',\n indexOptions: 'offsets',\n store: true,\n norms: 'include'\n }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ]\n }\n },\n {\n hostname: 'atlas-n1cm1j-shard-00-01',\n status: 'READY',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.000Z\")\n },\n definition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: {\n type: 'string',\n indexOptions: 'offsets',\n store: true,\n norms: 'include'\n }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ]\n }\n },\n {\n hostname: 'atlas-n1cm1j-shard-00-00',\n status: 'READY',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.000Z\")\n },\n definition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: {\n type: 'string',\n indexOptions: 'offsets',\n store: true,\n norms: 'include'\n }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ]\n }\n }\n ]\n }\n]","programmingLanguage":"JavaScript"}
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<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">id</span>: <span class="lg-highlight-string">'65240be420da840844a4d077'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mappings'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">latestDefinitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.305Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">latestDefinition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{ <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">statusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-02'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">indexOptions</span>: <span class="lg-highlight-string">'offsets'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">store</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">norms</span>: <span class="lg-highlight-string">'include'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-01'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">indexOptions</span>: <span class="lg-highlight-string">'offsets'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">store</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">norms</span>: <span class="lg-highlight-string">'include'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-00'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">indexOptions</span>: <span class="lg-highlight-string">'offsets'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">store</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">norms</span>: <span class="lg-highlight-string">'include'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-listSearchIndexes-examples-return-by-id">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Return a Single Search Index by id
<a class="headerlink leafygreen-ui-1kepx47" href="#return-a-single-search-index-by-id" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="return-a-single-search-index-by-id">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following example returns the search index with the provided
<code class="leafygreen-ui-1l06pbn">
id
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.movies.aggregate(\n [\n {\n $listSearchIndexes:\n {\n id: \"6524096020da840844a4c4a7\"\n }\n }\n ]\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">movies</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$listSearchIndexes</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">id</span>: <span class="lg-highlight-string">"6524096020da840844a4c4a7"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Sample output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n id: '6524096020da840844a4c4a7',\n name: 'default',\n status: 'BUILDING',\n queryable: true,\n latestDefinitionVersion: {\n version: 2,\n createdAt: ISODate(\"2023-10-09T14:51:57.355Z\")\n },\n latestDefinition: {\n mappings: { dynamic: true },\n storedSource: { include: [ 'awards.text' ] }\n },\n statusDetail: [\n {\n hostname: 'atlas-n1cm1j-shard-00-02',\n status: 'BUILDING',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:08:32.000Z\")\n },\n definition: { mappings: { dynamic: true, fields: {} } }\n },\n stagedIndex: {\n status: 'PENDING',\n queryable: false,\n definitionVersion: {\n version: 1,\n createdAt: ISODate(\"2023-10-09T14:51:29.000Z\")\n },\n definition: {\n mappings: { dynamic: true, fields: {} },\n storedSource: true\n }\n }\n },\n {\n hostname: 'atlas-n1cm1j-shard-00-01',\n status: 'BUILDING',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:08:32.000Z\")\n },\n definition: { mappings: { dynamic: true, fields: {} } }\n },\n stagedIndex: {\n status: 'PENDING',\n queryable: false,\n definitionVersion: {\n version: 1,\n createdAt: ISODate(\"2023-10-09T14:51:29.000Z\")\n },\n definition: {\n mappings: { dynamic: true, fields: {} },\n storedSource: true\n }\n }\n },\n {\n hostname: 'atlas-n1cm1j-shard-00-00',\n status: 'BUILDING',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:08:32.000Z\")\n },\n definition: { mappings: { dynamic: true, fields: {} } }\n }\n }\n ]\n }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">id</span>: <span class="lg-highlight-string">'6524096020da840844a4c4a7'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'default'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'BUILDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">latestDefinitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:51:57.355Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">latestDefinition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">storedSource</span>: <!-- -->{ <span class="lg-highlight-attr">include</span>: <!-- -->[ <span class="lg-highlight-string">'awards.text'</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">statusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-02'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'BUILDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:08:32.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{ <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">stagedIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'PENDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">false</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:51:29.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">storedSource</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-01'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'BUILDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:08:32.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{ <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">stagedIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'PENDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">false</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:51:29.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">storedSource</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-00'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'BUILDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:08:32.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{ <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Learn More
<a class="headerlink leafygreen-ui-1kepx47" href="#learn-more" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="learn-more">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To use a
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
method to view Atlas Search indexes, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.getSearchIndexes/#mongodb-method-db.collection.getSearchIndexes">
<code class="leafygreen-ui-1l06pbn">
db.collection.getSearchIndexes()
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
To create Atlas Search indexes, see:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.createSearchIndex/#mongodb-method-db.collection.createSearchIndex">
<code class="leafygreen-ui-1l06pbn">
db.collection.createSearchIndex()
</code>
</a>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
method
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/createSearchIndexes/#mongodb-dbcommand-dbcmd.createSearchIndexes">
<code class="leafygreen-ui-1l06pbn">
createSearchIndexes
</code>
</a>
database command
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/queryable-encryption/reference/supported-operations/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Supported Operations for Queryable Encryption
<a class="headerlink leafygreen-ui-1kepx47" href="#supported-operations-for-queryable-encryption" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="supported-operations-for-queryable-encryption">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#operations-using-bindata" target="_self">
<span>
Operations Using
<code class="css-1kekw28 e1wawog0">
BinData
</code>
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#supported-and-unsupported-bson-types" target="_self">
<span>
Supported and Unsupported BSON Types
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#crud" target="_self">
<span>
CRUD
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#supported-read-and-write-commands" target="_self">
<span>
Supported Read and Write Commands
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#supported-query-operators" target="_self">
<span>
Supported Query Operators
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#unsupported-queries" target="_self">
<span>
Unsupported Queries
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#supported-update-operators" target="_self">
<span>
Supported Update Operators
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#replacement-style-updates" target="_self">
<span>
Replacement-style Updates
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#unsupported-insert-operations" target="_self">
<span>
Unsupported Insert Operations
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#unsupported-aggregation-stages" target="_self">
<span>
Unsupported Aggregation Stages
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#supported-aggregation-stages" target="_self">
<span>
Supported Aggregation Stages
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#-lookup-and--graphlookup-behavior" target="_self">
<span>
<code class="css-1kekw28 e1wawog0">
$lookup
</code>
and
<code class="css-1kekw28 e1wawog0">
$graphLookup
</code>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#supported-aggregation-expressions" target="_self">
<span>
Supported Aggregation Expressions
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#unsupported-field-types" target="_self">
<span>
Unsupported Field Types
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
This page documents the specific data types, commands, query operators, update
operators, aggregation stages, and aggregation expressions supported for
Queryable Encryption compatible drivers. It outlines the behavior for operations using
automatic encryption, and operations using explicit encryption.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
Enterprise Feature
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Automatic encryption is available in MongoDB Enterprise and MongoDB Atlas
</p>
</div>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Operations Using
<code class="leafygreen-ui-1l06pbn">
BinData
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#operations-using-bindata" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="operations-using-bindata">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
MongoDB stores Queryable Encryption encrypted fields as a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json-v1/#mongodb-bsontype-data_binary">
<code class="leafygreen-ui-1l06pbn">
BinData
</code>
</a>
blob. Read and write operations issued against the encrypted
<code class="leafygreen-ui-1l06pbn">
BinData
</code>
value
may have unexpected or incorrect behavior as compared to issuing that same
operation against the decrypted value. Certain operations have strict BSON type
support where issuing them against a
<code class="leafygreen-ui-1l06pbn">
BinData
</code>
value returns an error.
</p>
<p class="leafygreen-ui-1kp3ins">
Official drivers compatible with Queryable Encryption parse read and write
operations for operators or expressions that don't support
<code class="leafygreen-ui-1l06pbn">
BinData
</code>
values.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-qe-commands-supported-bson-types">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Supported and Unsupported BSON Types
<a class="headerlink leafygreen-ui-1kepx47" href="#supported-and-unsupported-bson-types" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="supported-and-unsupported-bson-types">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Queryable Encryption supports equality queries against all
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-bson-types">
BSON types
</a>
except for the following:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
double
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
decimal128
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
object
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
array
</code>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Queryable Encryption supports range queries against the following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-bson-types">
BSON types
<!-- -->
:
</a>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
int
</code>
: 32-bit integer
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
long
</code>
: 64-bit integer
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
double
</code>
: Double (IEEE 754 Binary64)
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
decimal
</code>
: Decimal (IEEE 754 Decimal128)
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
date
</code>
: UTC DateTime (Int64)
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
CRUD
<a class="headerlink leafygreen-ui-1kepx47" href="#crud" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="crud">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Queryable Encryption doesn't support multi-document update or delete operations.
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.updateMany/#mongodb-method-db.collection.updateMany">
<code class="leafygreen-ui-1l06pbn">
db.collection.updateMany()
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.bulkWrite/#mongodb-method-db.collection.bulkWrite">
<code class="leafygreen-ui-1l06pbn">
db.collection.bulkWrite()
</code>
</a>
with more than one update or delete operation aren't supported.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Queryable Encryption limits
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.findAndModify/#mongodb-method-db.collection.findAndModify">
<code class="leafygreen-ui-1l06pbn">
db.collection.findAndModify()
</code>
</a>
arguments.
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
fields
</code>
is not allowed
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
new
</code>
must be false
</p>
</li>
</ul>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
When performing an upsert operation, any encrypted fields in the
filter are excluded from the insert.
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-qe-commands-supported-automatic-encryption">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Supported Read and Write Commands
<a class="headerlink leafygreen-ui-1kepx47" href="#supported-read-and-write-commands" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="supported-read-and-write-commands">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Queryable Encryption compatible drivers support automatic encryption with the
following commands:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/aggregate/#mongodb-dbcommand-dbcmd.aggregate">
<code class="leafygreen-ui-1l06pbn">
aggregate
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/count/#mongodb-dbcommand-dbcmd.count">
<code class="leafygreen-ui-1l06pbn">
count
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/delete/#mongodb-dbcommand-dbcmd.delete">
<code class="leafygreen-ui-1l06pbn">
delete
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/explain/#mongodb-dbcommand-dbcmd.explain">
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/find/#mongodb-dbcommand-dbcmd.find">
<code class="leafygreen-ui-1l06pbn">
find
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/findAndModify/#mongodb-dbcommand-dbcmd.findAndModify">
<code class="leafygreen-ui-1l06pbn">
findAndModify
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/insert/#mongodb-dbcommand-dbcmd.insert">
<code class="leafygreen-ui-1l06pbn">
insert
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/update/#mongodb-dbcommand-dbcmd.update">
<code class="leafygreen-ui-1l06pbn">
update
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For any supported command, the drivers return an error if
the command uses an unsupported operator, aggregation stage, or aggregation
expression. For a complete list of the supported operators, stages, and
expressions, see the following sections:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-qe-supported-query-operators" target="_self">
<span>
Supported Query Operators
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-qe-supported-update-operators" target="_self">
<span>
Supported Update Operators
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-qe-supported-aggregation-stages" target="_self">
<span>
Supported Aggregation Stages
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-qe-supported-aggregation-expressions" target="_self">
<span>
Supported Aggregation Expressions
</span>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
The following commands do not require automatic encryption. Official drivers
configured for automatic encryption pass these commands directly to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
:
</a>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/getMore/#mongodb-dbcommand-dbcmd.getMore">
<code class="leafygreen-ui-1l06pbn">
getMore
</code>
</a>
<a class="footnote-reference header-buffer" href="#footnote-1" id="ref-id1">
[
<!-- -->
1
<!-- -->
]
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/authenticate/#mongodb-dbcommand-dbcmd.authenticate">
<code class="leafygreen-ui-1l06pbn">
authenticate
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/hello/#mongodb-dbcommand-dbcmd.hello">
<code class="leafygreen-ui-1l06pbn">
hello
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/logout/#mongodb-dbcommand-dbcmd.logout">
<code class="leafygreen-ui-1l06pbn">
logout
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/abortTransaction/#mongodb-dbcommand-dbcmd.abortTransaction">
<code class="leafygreen-ui-1l06pbn">
abortTransaction
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/commitTransaction/#mongodb-dbcommand-dbcmd.commitTransaction">
<code class="leafygreen-ui-1l06pbn">
commitTransaction
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/endSessions/#mongodb-dbcommand-dbcmd.endSessions">
<code class="leafygreen-ui-1l06pbn">
endSessions
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/startSession/#mongodb-dbcommand-dbcmd.startSession">
<code class="leafygreen-ui-1l06pbn">
startSession
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/create/#mongodb-dbcommand-dbcmd.create">
<code class="leafygreen-ui-1l06pbn">
create
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/createIndexes/#mongodb-dbcommand-dbcmd.createIndexes">
<code class="leafygreen-ui-1l06pbn">
createIndexes
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/drop/#mongodb-dbcommand-dbcmd.drop">
<code class="leafygreen-ui-1l06pbn">
drop
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/dropDatabase/#mongodb-dbcommand-dbcmd.dropDatabase">
<code class="leafygreen-ui-1l06pbn">
dropDatabase
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/dropIndexes/#mongodb-dbcommand-dbcmd.dropIndexes">
<code class="leafygreen-ui-1l06pbn">
dropIndexes
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/killCursors/#mongodb-dbcommand-dbcmd.killCursors">
<code class="leafygreen-ui-1l06pbn">
killCursors
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/listCollections/#mongodb-dbcommand-dbcmd.listCollections">
<code class="leafygreen-ui-1l06pbn">
listCollections
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/listDatabases/#mongodb-dbcommand-dbcmd.listDatabases">
<code class="leafygreen-ui-1l06pbn">
listDatabases
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/listIndexes/#mongodb-dbcommand-dbcmd.listIndexes">
<code class="leafygreen-ui-1l06pbn">
listIndexes
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/renameCollection/#mongodb-dbcommand-dbcmd.renameCollection">
<code class="leafygreen-ui-1l06pbn">
renameCollection
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/ping/#mongodb-dbcommand-dbcmd.ping">
<code class="leafygreen-ui-1l06pbn">
ping
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Issuing any other command through a compatible driver configured for automatic
encryption returns an error.
</p>
<table class="header-buffer leafygreen-ui-rbqgrl" frame="void" id="footnote-1" rules="none">
<colgroup>
<col/>
</colgroup>
<tbody valign="top">
<tr>
<td class="leafygreen-ui-17r2xs0">
[
<a href="#ref-id1">
1
</a>
]
</td>
<td class="leafygreen-ui-17r2xs0">
<!-- -->
While automatic encryption does not encrypt the getMore command, the response
to the command may contain encrypted field values.
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
Applications configured with the correct Queryable Encryption options automatically decrypt
those values.
</li>
<li class="leafygreen-ui-d7p7b6">
Applications without the correct encryption options see the encrypted values.
</li>
</ul>
</td>
</tr>
</tbody>
</table>
<span class="leafygreen-ui-1qnjd6d" id="std-label-qe-supported-query-operators">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Supported Query Operators
<a class="headerlink leafygreen-ui-1kepx47" href="#supported-query-operators" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="supported-query-operators">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Drivers configured for automatic encryption support a limited set of query
operators when issued against an encrypted queryable field.
</p>
<p class="leafygreen-ui-1kp3ins">
Querying non-encrypted fields or encrypted fields with a supported query
type returns encrypted data that is then decrypted at the client.
</p>
<p class="leafygreen-ui-1kp3ins">
Queryable Encryption currently supports
<code class="leafygreen-ui-1l06pbn">
none
</code>
,
<code class="leafygreen-ui-1l06pbn">
equality
</code>
, and
<code class="leafygreen-ui-1l06pbn">
range
</code>
query types. If
the query type is unspecified, it defaults to
<code class="leafygreen-ui-1l06pbn">
none
</code>
. If the query type is
<code class="leafygreen-ui-1l06pbn">
none
</code>
, the field is encrypted and clients can't query it.
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
Comparison Support
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Comparison of an encrypted field to a plaintext value is supported.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{$expr: {$eq: [\"$encrypted1\", \"plaintext_value\"]}}","programmingLanguage":"JSON"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light json leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-punctuation">{</span>$expr<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span>$eq<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">[</span><span class="lg-highlight-string">"$encrypted1"</span><span class="lg-highlight-punctuation">,</span> <span class="lg-highlight-string">"plaintext_value"</span><span class="lg-highlight-punctuation">]</span><span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">}</span></td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Comparison of one encrypted field to another encrypted field will fail.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{$expr: {$eq: [\"$encrypted1\", \"$encrypted2\"]}}","programmingLanguage":"JSON"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light json leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-punctuation">{</span>$expr<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span>$eq<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">[</span><span class="lg-highlight-string">"$encrypted1"</span><span class="lg-highlight-punctuation">,</span> <span class="lg-highlight-string">"$encrypted2"</span><span class="lg-highlight-punctuation">]</span><span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">}</span></td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Fields configured for
<code class="leafygreen-ui-1l06pbn">
queryType: "equality"
</code>
support the following expressions:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/eq/#mongodb-query-op.-eq">
<code class="leafygreen-ui-1l06pbn">
$eq
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/ne/#mongodb-query-op.-ne">
<code class="leafygreen-ui-1l06pbn">
$ne
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/in/#mongodb-query-op.-in">
<code class="leafygreen-ui-1l06pbn">
$in
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/nin/#mongodb-query-op.-nin">
<code class="leafygreen-ui-1l06pbn">
$nin
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/and/#mongodb-query-op.-and">
<code class="leafygreen-ui-1l06pbn">
$and
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/or/#mongodb-query-op.-or">
<code class="leafygreen-ui-1l06pbn">
$or
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/not/#mongodb-query-op.-not">
<code class="leafygreen-ui-1l06pbn">
$not
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/nor/#mongodb-query-op.-nor">
<code class="leafygreen-ui-1l06pbn">
$nor
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/expr/#mongodb-query-op.-expr">
<code class="leafygreen-ui-1l06pbn">
$expr
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/exists/#mongodb-query-op.-exists">
<code class="leafygreen-ui-1l06pbn">
$exists
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Fields configured for
<code class="leafygreen-ui-1l06pbn">
queryType: "range"
</code>
support the following expressions:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/lt/#mongodb-query-op.-lt">
<code class="leafygreen-ui-1l06pbn">
$lt
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/lte/#mongodb-query-op.-lte">
<code class="leafygreen-ui-1l06pbn">
$lte
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/gt/#mongodb-query-op.-gt">
<code class="leafygreen-ui-1l06pbn">
$gt
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/gte/#mongodb-query-op.-gte">
<code class="leafygreen-ui-1l06pbn">
$gte
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/and/#mongodb-query-op.-and">
<code class="leafygreen-ui-1l06pbn">
$and
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/exists/#mongodb-query-op.-exists">
<code class="leafygreen-ui-1l06pbn">
$exists
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Queries specifying any other query operator against an
encrypted field return an error.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-qe-query-unsupported">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Unsupported Queries
<a class="headerlink leafygreen-ui-1kepx47" href="#unsupported-queries" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="unsupported-queries">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Queries that compare an encrypted field to
<code class="leafygreen-ui-1l06pbn">
null
</code>
or a regular expression
always throw an error, even if using a supported query operator.
</p>
<p class="leafygreen-ui-1kp3ins">
When using a MongoClient configured for Queryable Encryption, the following query
operators throw an error, even if issued against an unencrypted field:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/text/#mongodb-query-op.-text">
<code class="leafygreen-ui-1l06pbn">
$text
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/where/#mongodb-query-op.-where">
<code class="leafygreen-ui-1l06pbn">
$where
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/jsonSchema/#mongodb-query-op.-jsonSchema">
<code class="leafygreen-ui-1l06pbn">
$jsonSchema
</code>
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-qe-supported-update-operators">
</span>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Supported Update Operators
<a class="headerlink leafygreen-ui-1kepx47" href="#supported-update-operators" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="supported-update-operators">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Drivers configured for automatic encryption support the following update operators
when issued against encrypted fields:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/set/#mongodb-update-up.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/unset/#mongodb-update-up.-unset">
<code class="leafygreen-ui-1l06pbn">
$unset
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Updates specifying any other update operator against an encrypted field
return an error.
</p>
<p class="leafygreen-ui-1kp3ins">
Update operations with the following behavior throw an error, even if
using a supported operator:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The update operation produces an array inside of an encrypted path.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The update operation uses aggregation expression syntax.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For update operations specifying a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/update/#std-label-update-command-q">
query filter
</a>
on encrypted fields, the query filter must use only
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/csfle/reference/supported-operations/#std-label-csfle-supported-query-operators">
supported operators
</a>
on those fields.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Replacement-style Updates
<a class="headerlink leafygreen-ui-1kepx47" href="#replacement-style-updates" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="replacement-style-updates">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Replacement-style updates are supported, however, if the replacement document
contains a
<code class="leafygreen-ui-1l06pbn">
Timestamp(0,0)
</code>
inside a top-level encrypted field,
Queryable Encryption will error. The
<code class="leafygreen-ui-1l06pbn">
(0,0)
</code>
value indicates that the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
should generate the Timestamp.
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
cannot generate encrypted fields.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-qe-supported-insert-operation">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Unsupported Insert Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#unsupported-insert-operations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="unsupported-insert-operations">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Compatible drivers configured for automatic encryption do not support insert
commands with the following behavior:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Inserting a document with
<code class="leafygreen-ui-1l06pbn">
Timestamp(0,0)
</code>
associated to an encrypted field.
The
<code class="leafygreen-ui-1l06pbn">
(0,0)
</code>
value indicates that the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
should
generate the Timestamp. Since the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
cannot generate
encrypted fields, the resulting timestamp would be unencrypted.
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-qe-unsupported-aggregation-stages">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Unsupported Aggregation Stages
<a class="headerlink leafygreen-ui-1kepx47" href="#unsupported-aggregation-stages" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="unsupported-aggregation-stages">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Automatic encryption will not support aggregation stages that read from or
write to additional collections. These stages are:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/out/#mongodb-pipeline-pipe.-out">
<code class="leafygreen-ui-1l06pbn">
$out
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/merge/#mongodb-pipeline-pipe.-merge">
<code class="leafygreen-ui-1l06pbn">
$merge
</code>
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-qe-supported-aggregation-stages">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Supported Aggregation Stages
<a class="headerlink leafygreen-ui-1kepx47" href="#supported-aggregation-stages" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="supported-aggregation-stages">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Compatible drivers configured for automatic encryption support the following
aggregation pipeline stages:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/addFields/#mongodb-pipeline-pipe.-addFields">
<code class="leafygreen-ui-1l06pbn">
$addFields
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/bucket/#mongodb-pipeline-pipe.-bucket">
<code class="leafygreen-ui-1l06pbn">
$bucket
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/bucketAuto/#mongodb-pipeline-pipe.-bucketAuto">
<code class="leafygreen-ui-1l06pbn">
$bucketAuto
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/collStats/#mongodb-pipeline-pipe.-collStats">
<code class="leafygreen-ui-1l06pbn">
$collStats
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/count/#mongodb-pipeline-pipe.-count">
<code class="leafygreen-ui-1l06pbn">
$count
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/geoNear/#mongodb-pipeline-pipe.-geoNear">
<code class="leafygreen-ui-1l06pbn">
$geoNear
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
on unencrypted fields
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/indexStats/#mongodb-pipeline-pipe.-indexStats">
<code class="leafygreen-ui-1l06pbn">
$indexStats
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/limit/#mongodb-pipeline-pipe.-limit">
<code class="leafygreen-ui-1l06pbn">
$limit
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lookup/#mongodb-pipeline-pipe.-lookup">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/graphLookup/#mongodb-pipeline-pipe.-graphLookup">
<code class="leafygreen-ui-1l06pbn">
$graphLookup
</code>
</a>
(For usage
requirements, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/csfle/reference/supported-operations/#std-label-csfle-lookup-graphLookup-behavior">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
and
<code class="leafygreen-ui-1l06pbn">
$graphLookup
</code>
Behavior
<!-- -->
)
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/match/#mongodb-pipeline-pipe.-match">
<code class="leafygreen-ui-1l06pbn">
$match
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/project/#mongodb-pipeline-pipe.-project">
<code class="leafygreen-ui-1l06pbn">
$project
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/redact/#mongodb-pipeline-pipe.-redact">
<code class="leafygreen-ui-1l06pbn">
$redact
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/replaceRoot/#mongodb-pipeline-pipe.-replaceRoot">
<code class="leafygreen-ui-1l06pbn">
$replaceRoot
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/sample/#mongodb-pipeline-pipe.-sample">
<code class="leafygreen-ui-1l06pbn">
$sample
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/skip/#mongodb-pipeline-pipe.-skip">
<code class="leafygreen-ui-1l06pbn">
$skip
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/sort/#mongodb-pipeline-pipe.-sort">
<code class="leafygreen-ui-1l06pbn">
$sort
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/sortByCount/#mongodb-pipeline-pipe.-sortByCount">
<code class="leafygreen-ui-1l06pbn">
$sortByCount
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/unwind/#mongodb-pipeline-pipe.-unwind">
<code class="leafygreen-ui-1l06pbn">
$unwind
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Aggregation pipelines operating on collections configured for automatic
encryption that specify any other stage return an error.
</p>
<p class="leafygreen-ui-1kp3ins">
For each supported pipeline stage, MongoDB tracks fields that
<em>
must
</em>
be
encrypted as they pass through the supported pipelines and marks them
for encryption.
</p>
<p class="leafygreen-ui-1kp3ins">
Each supported stage must specify only supported
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-qe-supported-query-operators" target="_self">
<span>
query operators
</span>
</a>
and
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-qe-supported-aggregation-expressions" target="_self">
<span>
aggregation expressions
<!-- -->
.
</span>
</a>
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-qe-csfle-lookup-graphLookup-behavior">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
and
<code class="leafygreen-ui-1l06pbn">
$graphLookup
</code>
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#-lookup-and--graphlookup-behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-lookup-and--graphlookup-behavior">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Automatic encryption supports the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lookup/#mongodb-pipeline-pipe.-lookup">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/graphLookup/#mongodb-pipeline-pipe.-graphLookup">
<code class="leafygreen-ui-1l06pbn">
$graphLookup
</code>
</a>
<em>
only if
</em>
the
<code class="leafygreen-ui-1l06pbn">
from
</code>
collection matches the
collection the aggregation runs against.
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
and
<code class="leafygreen-ui-1l06pbn">
$graphLookup
</code>
stages that reference a different
<code class="leafygreen-ui-1l06pbn">
from
</code>
collection return an error.
</p>
<p class="leafygreen-ui-1kp3ins">
Automatic encryption does not support "connectionless" aggregation metadata
sources, which read metadata that doesn't pertain to a particular
collection, such as:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/currentOp/#mongodb-pipeline-pipe.-currentOp">
<code class="leafygreen-ui-1l06pbn">
$currentOp
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/changeStreams/#std-label-changeStreams">
Change Streams
</a>
for watching a database or the whole cluster
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/listSessions/#mongodb-pipeline-pipe.-listSessions">
<code class="leafygreen-ui-1l06pbn">
$listSessions
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/listLocalSessions/#mongodb-pipeline-pipe.-listLocalSessions">
<code class="leafygreen-ui-1l06pbn">
$listLocalSessions
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Automatic encryption does not support the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/planCacheStats/#mongodb-pipeline-pipe.-planCacheStats">
<code class="leafygreen-ui-1l06pbn">
$planCacheStats
</code>
</a>
stage
as the result may contain sensitive information.
</p>
<p class="leafygreen-ui-1kp3ins">
You cannot perform a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lookup/#mongodb-pipeline-pipe.-lookup">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
</a>
from a Queryable Encryption-enabled
<code class="leafygreen-ui-1l06pbn">
MongoClient
</code>
on unencrypted collections.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-qe-supported-aggregation-expressions">
</span>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Supported Aggregation Expressions
<a class="headerlink leafygreen-ui-1kepx47" href="#supported-aggregation-expressions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="supported-aggregation-expressions">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Compatible drivers configured for automatic encryption support the following
expressions against any equality query type encrypted fields:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/cond/#mongodb-expression-exp.-cond">
<code class="leafygreen-ui-1l06pbn">
$cond
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/eq/#mongodb-expression-exp.-eq">
<code class="leafygreen-ui-1l06pbn">
$eq
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/ifNull/#mongodb-expression-exp.-ifNull">
<code class="leafygreen-ui-1l06pbn">
$ifNull
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/in/#mongodb-expression-exp.-in">
<code class="leafygreen-ui-1l06pbn">
$in
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/let/#mongodb-expression-exp.-let">
<code class="leafygreen-ui-1l06pbn">
$let
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/literal/#mongodb-expression-exp.-literal">
<code class="leafygreen-ui-1l06pbn">
$literal
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/ne/#mongodb-expression-exp.-ne">
<code class="leafygreen-ui-1l06pbn">
$ne
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/switch/#mongodb-expression-exp.-switch">
<code class="leafygreen-ui-1l06pbn">
$switch
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
All other aggregation expressions return an error if issued against
encrypted fields.
</p>
<p class="leafygreen-ui-1kp3ins">
Aggregation stages with the following behavior return an error,
even if using a supported aggregation expression:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:30%"/>
<col style="width:60%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Expressions
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Rejected Behavior
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Example
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/cond/#mongodb-expression-exp.-cond">
<code class="leafygreen-ui-1l06pbn">
$cond
</code>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/switch/#mongodb-expression-exp.-switch">
<code class="leafygreen-ui-1l06pbn">
$switch
</code>
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The expression specifies a field whose encryption properties
cannot be known until runtime
<em>
and
</em>
a subsequent aggregation
stage includes an expression referencing that field.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"$addFields : {\n \"valueWithUnknownEncryption\" : {\n $cond : {\n if : { \"$encryptedField\" : \"value\" },\n then : \"$encryptedField\",\n else: \"unencryptedValue\"\n }\n }\n},\n{\n $match : {\n \"valueWithUnknownEncryption\" : \"someNewValue\"\n }\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$addFields<!-- --> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"valueWithUnknownEncryption"</span> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->$cond<!-- --> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">if</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"$encryptedField"</span> <!-- -->: <span class="lg-highlight-string">"value"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->then <!-- -->: <span class="lg-highlight-string">"$encryptedField"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">else</span>: <span class="lg-highlight-string">"unencryptedValue"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->$match<!-- --> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"valueWithUnknownEncryption"</span> <!-- -->: <span class="lg-highlight-string">"someNewValue"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/eq/#mongodb-expression-exp.-eq">
<code class="leafygreen-ui-1l06pbn">
$eq
</code>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/ne/#mongodb-expression-exp.-ne">
<code class="leafygreen-ui-1l06pbn">
$ne
</code>
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The expression creates a new field that references an
encrypted field
<em>
and
</em>
operates on that new field in the same
expression.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n $eq : [\n {\"newField\" : \"$encryptedField\"},\n {\"newField\" : \"value\"\n ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->$eq<!-- --> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{<span class="lg-highlight-string">"newField"</span> <!-- -->: <span class="lg-highlight-string">"$encryptedField"</span>}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{<span class="lg-highlight-string">"newField"</span> <!-- -->: <span class="lg-highlight-string">"value"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/eq/#mongodb-expression-exp.-eq">
<code class="leafygreen-ui-1l06pbn">
$eq
</code>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/ne/#mongodb-expression-exp.-ne">
<code class="leafygreen-ui-1l06pbn">
$ne
</code>
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The expression references the prefix of an encrypted field
within the comparison expression.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $eq : [ \"$prefixOfEncryptedField\" , \"value\"] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1agdxuk" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->$eq<!-- --> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"$prefixOfEncryptedField"</span> <!-- -->, <span class="lg-highlight-string">"value"</span>] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/eq/#mongodb-expression-exp.-eq">
<code class="leafygreen-ui-1l06pbn">
$eq
</code>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/ne/#mongodb-expression-exp.-ne">
<code class="leafygreen-ui-1l06pbn">
$ne
</code>
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The result of the expression is compared to an encrypted field.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n $eq : [\n \"$encryptedField\" ,\n { $ne : [ \"field\", \"value\" ] }\n ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->$eq<!-- --> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"$encryptedField"</span> <!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->$ne<!-- --> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"field"</span>, <span class="lg-highlight-string">"value"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/let/#mongodb-expression-exp.-let">
<code class="leafygreen-ui-1l06pbn">
$let
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The expression binds a variable to an encrypted
field or attempts to rebind
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/aggregation-variables/#mongodb-variable-variable.CURRENT">
<code class="leafygreen-ui-1l06pbn">
$$CURRENT
</code>
.
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n $let: {\n \"vars\" : {\n \"newVariable\" : \"$encryptedField\"\n }\n }\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$let</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"vars"</span> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"newVariable"</span> <!-- -->: <span class="lg-highlight-string">"$encryptedField"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/in/#mongodb-expression-exp.-in">
<code class="leafygreen-ui-1l06pbn">
$in
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The first argument to the expression
<em>
is
</em>
an encrypted field,
<em>
and
</em>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The second argument to the expression is
<em>
not
</em>
an array literal
</p>
<p class="leafygreen-ui-1kp3ins">
<em>
-OR-
</em>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The second argument to the expression is an encrypted field.
</p>
</li>
</ul>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n $in : [\n \"$encryptedField\" ,\n \"$otherEncryptedField\"\n ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->$in<!-- --> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"$encryptedField"</span> <!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"$otherEncryptedField"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Unsupported Field Types
<a class="headerlink leafygreen-ui-1kepx47" href="#unsupported-field-types" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="unsupported-field-types">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Drivers configured for automatic encryption do
<em>
not
</em>
support any
read or write operation that requires encrypting the following value
types:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-MaxKey">
<code class="leafygreen-ui-1l06pbn">
MaxKey
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-MinKey">
<code class="leafygreen-ui-1l06pbn">
MinKey
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
null
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
undefined
</code>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Queryable Encryption does not adequately hide the type information for these values.
</p>
<p class="leafygreen-ui-1kp3ins">
Queryable Encryption does not support automatic encryption on fields within an array of
documents.
</p>
<p class="leafygreen-ui-1kp3ins">
Queryable Encryption does not support read or write operations on an
encrypted field where the operation compares the encrypted field to the
following value types:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
array
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
decimal128
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
double
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
object
</code>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/Mongo.getDBNames/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Mongo.getDBNames()
<a class="headerlink leafygreen-ui-1kepx47" href="#mongo.getdbnames--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongo.getdbnames--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#description" target="_self">
<span>
Description
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Description
<a class="headerlink leafygreen-ui-1kepx47" href="#description" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="description">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
Mongo.getDBNames()
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-Mongo.getDBNames" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-Mongo.getDBNames">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Returns a list of available databases.
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-Mongo.getDBNames" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
Mongo.getDBNames()
</code>
</span>
</a>
calls the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/listDatabases/#mongodb-dbcommand-dbcmd.listDatabases">
<code class="leafygreen-ui-1l06pbn">
listDatabases
</code>
</a>
command.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-Mongo.getDBNames" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
Mongo.getDBNames()
</code>
</span>
</a>
method doesn't take any parameters.
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
List Databases
<a class="headerlink leafygreen-ui-1kepx47" href="#list-databases" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="list-databases">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
List the available databases for the current MongoDB instance:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.getMongo().getDBNames()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">getMongo</span>(<!-- -->).<span class="lg-highlight-title lg-highlight-function">getDBNames</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.getMongo/#mongodb-method-db.getMongo">
<code class="leafygreen-ui-1l06pbn">
db.getMongo()
</code>
</a>
method creates a connection to the
instance.
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-Mongo.getDBNames" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
Mongo.getDBNames()
</code>
</span>
</a>
returns:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[ 'admin', 'config', 'local', 'test' ]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[ <span class="lg-highlight-string">'admin'</span>, <span class="lg-highlight-string">'config'</span>, <span class="lg-highlight-string">'local'</span>, <span class="lg-highlight-string">'test'</span> ]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Map Database List to Another Method
<a class="headerlink leafygreen-ui-1kepx47" href="#map-database-list-to-another-method" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="map-database-list-to-another-method">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-Mongo.getDBNames" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
Mongo.getDBNames()
</code>
</span>
</a>
to get a list of collections:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.getMongo().getDBNames().map(\n name => db.getSiblingDB( name ).getCollectionNames()\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">getMongo</span>(<!-- -->).<span class="lg-highlight-title lg-highlight-function">getDBNames</span>(<!-- -->).<span class="lg-highlight-title lg-highlight-function">map</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">name</span><span class="lg-highlight-function"> =></span> <!-- -->db.<span class="lg-highlight-title lg-highlight-function">getSiblingDB</span>( <!-- -->name ).<span class="lg-highlight-title lg-highlight-function">getCollectionNames</span>(<!-- -->)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Example output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n [ 'system.users', 'system.keys', 'system.version' ],\n [\n 'settings',\n 'tenantMigrationRecipients',\n 'system.sessions',\n 'transactions',\n 'external_validation_keys',\n 'image_collection',\n 'tenantMigrationDonors',\n 'system.indexBuilds'\n ],\n [\n 'replset.minvalid',\n 'system.views',\n 'oplog.rs',\n 'replset.initialSyncId',\n 'startup_log',\n 'system.replset',\n 'system.rollback.id',\n 'replset.oplogTruncateAfterPoint',\n 'replset.election',\n 'system.tenantMigration.oplogView'\n ],\n [\n 'feedback',\n 'inventory',\n 'engineers',\n 'clothes'\n ]\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[ <span class="lg-highlight-string">'system.users'</span>, <span class="lg-highlight-string">'system.keys'</span>, <span class="lg-highlight-string">'system.version'</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'settings'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'tenantMigrationRecipients'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'system.sessions'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'transactions'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'external_validation_keys'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'image_collection'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'tenantMigrationDonors'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'system.indexBuilds'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'replset.minvalid'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'system.views'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'oplog.rs'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'replset.initialSyncId'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'startup_log'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'system.replset'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'system.rollback.id'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'replset.oplogTruncateAfterPoint'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'replset.election'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'system.tenantMigration.oplogView'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'feedback'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'inventory'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'engineers'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'clothes'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-Mongo.getDBNames" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
Mongo.getDBNames()
</code>
</span>
</a>
returns a list of databases.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
map
</code>
defines a function that iterates over the list of databases.
Each iteration of
<code class="leafygreen-ui-1l06pbn">
map
</code>
:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
assigns a database to the
<code class="leafygreen-ui-1l06pbn">
name
</code>
variable,
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
connects to the database currently stored in
<code class="leafygreen-ui-1l06pbn">
name
</code>
using
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.getSiblingDB/#mongodb-method-db.getSiblingDB">
<code class="leafygreen-ui-1l06pbn">
db.getSiblingDB()
</code>
,
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
returns the collections in the current database using
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.getCollectionNames/#mongodb-method-db.getCollectionNames">
<code class="leafygreen-ui-1l06pbn">
db.getCollectionNames()
</code>
.
</a>
</p>
</li>
</ul>
</li>
</ul>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/command/abortReshardCollection/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
abortReshardCollection
<a class="headerlink leafygreen-ui-1kepx47" href="#abortreshardcollection" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="abortreshardcollection">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="dbcommand">
<dt>
<code class="leafygreen-ui-1l06pbn">
abortReshardCollection
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-dbcommand-dbcmd.abortReshardCollection" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-dbcommand-dbcmd.abortReshardCollection">
</div>
</a>
</dt>
<dd>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
During a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-reshard-a-collection/#std-label-sharding-resharding">
resharding operation
</a>
, you can
abort the operation with the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.abortReshardCollection" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
abortReshardCollection
</code>
</span>
</a>
command.
</p>
<p class="leafygreen-ui-1kp3ins">
You can abort a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-reshard-a-collection/#std-label-sharding-resharding">
resharding operation
</a>
at
any point until the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/reshardCollection/#std-label-resharding-commit-phase-command">
commit phase
</a>
. If the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-reshard-a-collection/#std-label-sharding-resharding">
resharding operation
</a>
has reached the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/reshardCollection/#std-label-resharding-commit-phase-command">
commit phase
</a>
before you run the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.abortReshardCollection" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
abortReshardCollection
</code>
</span>
</a>
command, the command returns an
error.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
In
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#std-program-mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
, this command can also be run through the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.abortReshardCollection/#mongodb-method-sh.abortReshardCollection">
<code class="leafygreen-ui-1l06pbn">
sh.abortReshardCollection()
</code>
</a>
helper method
<!-- -->
.
</p>
<p class="leafygreen-ui-1kp3ins">
Helper methods are convenient for
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#std-program-mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
users, but they may not
return the same level of information as database commands. In cases where
the convenience is not needed or the additional return fields are required,
use the database command.
</p>
</div>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This command is available in deployments hosted in the following environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This command is supported in all MongoDB Atlas clusters.
For information on Atlas support for all commands, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/" target="_self">
<span>
Unsupported Commands
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The command has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.adminCommand(\n {\n abortReshardCollection: \"<database>.<collection>\"\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">abortReshardCollection</span>: <span class="lg-highlight-string">"<database>.<collection>"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Abort a Resharding Operation
<a class="headerlink leafygreen-ui-1kepx47" href="#abort-a-resharding-operation" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="abort-a-resharding-operation">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following example aborts a running
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-reshard-a-collection/#std-label-sharding-resharding">
resharding operation
</a>
on the
<code class="leafygreen-ui-1l06pbn">
sales.orders
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.adminCommand({\n abortReshardCollection: \"sales.orders\"\n})","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">abortReshardCollection</span>: <span class="lg-highlight-string">"sales.orders"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">})</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-reshard-a-collection/#std-label-sharding-resharding">
Reshard a Collection
</a>
</p>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/csfle/fundamentals/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Fundamentals
<a class="headerlink leafygreen-ui-1kepx47" href="#fundamentals" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="fundamentals">
</div>
</a>
</h1>
<p class="leafygreen-ui-1kp3ins">
To learn about encryption key management, read
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/queryable-encryption/fundamentals/keys-key-vaults/#std-label-qe-reference-keys-key-vaults">
Encryption Keys and Key Vaults
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
To learn how Client-Side Field Level Encryption works and how to use it, read the following sections:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/csfle/fundamentals/automatic-encryption/#std-label-csfle-fundamentals-automatic-encryption">
Automatic Encryption
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/csfle/fundamentals/manual-encryption/#std-label-csfle-fundamentals-manual-encryption">
Explicit Encryption
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/csfle/fundamentals/create-schema/#std-label-csfle-fundamentals-create-schema">
Encryption Schemas
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/csfle/fundamentals/manage-keys/#std-label-csfle-fundamentals-manage-keys">
Encryption Key Management
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/csfle/fundamentals/encryption-algorithms/#std-label-csfle-reference-encryption-algorithms">
Fields and Encryption Types
</a>
</p>
</li>
</ul>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/aggregation/indexOfCP/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$indexOfCP (aggregation)
<a class="headerlink leafygreen-ui-1kepx47" href="#-indexofcp--aggregation-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-indexofcp--aggregation-">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="expression">
<dt>
<code class="leafygreen-ui-1l06pbn">
$indexOfCP
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-expression-exp.-indexOfCP" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-expression-exp.-indexOfCP">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Searches a string for an occurrence of a substring and returns the
UTF-8
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://www.unicode.org/glossary/#code_point" rel="noopener noreferrer">
<span>
code point
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
index (zero-based) of the first occurrence. If the
substring is not found, returns
<code class="leafygreen-ui-1l06pbn">
-1
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-indexOfCP" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$indexOfCP
</code>
</span>
</a>
has the following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-agg-quick-ref-operator-expressions">
operator
expression syntax
<!-- -->
:
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $indexOfCP: [ <string>, <substring>, <start>, <end> ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$indexOfCP</span>: <!-- -->[ <!-- --><string expression>, <substring expression>, <start>, <end> ] }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
<string>
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Can be any valid
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
as long
as it resolves to a string. For more information on expressions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
Expression Operators
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
If the string expression resolves to a value of
<code class="leafygreen-ui-1l06pbn">
null
</code>
or refers
to a field that is missing,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-indexOfCP" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$indexOfCP
</code>
</span>
</a>
returns
<code class="leafygreen-ui-1l06pbn">
null
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
If the string expression does not resolve to a string or
<code class="leafygreen-ui-1l06pbn">
null
</code>
nor refers to a missing field,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-indexOfCP" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$indexOfCP
</code>
</span>
</a>
returns an
error.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
<substring>
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Can be any valid
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
as long
as it resolves to a string. For more information on expressions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
Expression Operators
<!-- -->
.
</a>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
<start>
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. An integer, or a number that can be represented as integers (such as
2.0), that specifies the starting index position for the search. Can
be any valid
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
that
resolves to a non-negative integral number.
</p>
<p class="leafygreen-ui-1kp3ins">
If unspecified, the starting index position for the search is the
beginning of the string.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
<end>
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. An integer, or a number that can be represented as integers (such as
2.0), that specifies the ending index position for the search. Can
be any valid
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
that
resolves to a non-negative integral number. If you specify a
<code class="leafygreen-ui-1l06pbn">
<end>
</code>
index value, you should also specify a
<code class="leafygreen-ui-1l06pbn">
<start>
</code>
index
value; otherwise,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-indexOfCP" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$indexOfCP
</code>
</span>
</a>
uses the
<code class="leafygreen-ui-1l06pbn">
<end>
</code>
value
as the
<code class="leafygreen-ui-1l06pbn">
<start>
</code>
index value instead of the
<code class="leafygreen-ui-1l06pbn">
<end>
</code>
value.
</p>
<p class="leafygreen-ui-1kp3ins">
If unspecified, the ending index position for the search is the
end of the string.
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
If the
<code class="leafygreen-ui-1l06pbn">
<substring expression>
</code>
is found multiple times within the
<code class="leafygreen-ui-1l06pbn">
<string expression>
</code>
, then
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-indexOfCP" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$indexOfCP
</code>
</span>
</a>
returns the
index of the first
<code class="leafygreen-ui-1l06pbn">
<substring expression>
</code>
found from the starting
index position.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-indexOfCP" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$indexOfCP
</code>
</span>
</a>
returns
<code class="leafygreen-ui-1l06pbn">
null
</code>
:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
<string expression>
</code>
is null, or
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
<string expression>
</code>
refers to a non-existing field in the
input document.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-indexOfCP" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$indexOfCP
</code>
</span>
</a>
returns an error:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
<string expression>
</code>
is not a string and not null, or
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
<substring expression>
</code>
is null or is not a string or refers to
a nonexistent field in the input document, or
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
<start>
</code>
or
<code class="leafygreen-ui-1l06pbn">
<end>
</code>
is a negative integer (or a value that
can be represented as a negative integer, like -5.0).
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-indexOfCP" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$indexOfCP
</code>
</span>
</a>
returns
<code class="leafygreen-ui-1l06pbn">
-1
</code>
:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If the substring is not found in the
<code class="leafygreen-ui-1l06pbn">
<string expression>
</code>
, or
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
<start>
</code>
is a number greater than
<code class="leafygreen-ui-1l06pbn">
<end>
</code>
, or
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
<start>
</code>
is a number greater than the byte length of the string.
</p>
</li>
</ul>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:95%"/>
<col style="width:5%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Example
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Results
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $indexOfCP: [ "cafeteria", "e" ] }
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
3
</code>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $indexOfCP: [ "cafétéria", "é" ] }
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
3
</code>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $indexOfCP: [ "cafétéria", "e" ] }
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
-1
</code>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $indexOfCP: [ "cafétéria", "t" ] }
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
4
</code>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $indexOfCP: [ "foo.bar.fi", ".", 5 ] }
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
7
</code>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $indexOfCP: [ "vanilla", "ll", 0, 2 ] }
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
-1
</code>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $indexOfCP: [ "vanilla", "ll", -1 ] }
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Error
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $indexOfCP: [ "vanilla", "ll", 12 ] }
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
-1
</code>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $indexOfCP: [ "vanilla", "ll", 5, 2 ] }
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
-1
</code>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $indexOfCP: [ "vanilla", "nilla", 3 ] }
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
-1
</code>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $indexOfCP: [ null, "foo" ] }
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
null
</code>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Consider an
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"item\" : \"foo\" }\n{ \"_id\" : 2, \"item\" : \"fóofoo\" }\n{ \"_id\" : 3, \"item\" : \"the foo bar\" }\n{ \"_id\" : 4, \"item\" : \"hello world fóo\" }\n{ \"_id\" : 5, \"item\" : null }\n{ \"_id\" : 6, \"amount\" : 3 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"foo"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"fóofoo"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"the foo bar"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"hello world fóo"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-literal">null</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"amount"</span> <!-- -->: <span class="lg-highlight-number">3</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following operation uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-indexOfCP" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$indexOfCP
</code>
</span>
</a>
operator to
return the code point index at which the string
<code class="leafygreen-ui-1l06pbn">
foo
</code>
is located in
each
<code class="leafygreen-ui-1l06pbn">
item
</code>
string:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.aggregate(\n [\n {\n $project:\n {\n cpLocation: { $indexOfCP: [ \"$item\", \"foo\" ] },\n }\n }\n ]\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$project</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">cpLocation</span>: <!-- -->{ <span class="lg-highlight-attr">$indexOfCP</span>: <!-- -->[ <span class="lg-highlight-string">"$item"</span>, <span class="lg-highlight-string">"foo"</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following results:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"cpLocation\" : \"0\" }\n{ \"_id\" : 2, \"cpLocation\" : \"3\" }\n{ \"_id\" : 3, \"cpLocation\" : \"4\" }\n{ \"_id\" : 4, \"cpLocation\" : \"-1\" }\n{ \"_id\" : 5, \"cpLocation\" : null }\n{ \"_id\" : 6, \"cpLocation\" : null }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"cpLocation"</span> <!-- -->: <span class="lg-highlight-string">"0"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"cpLocation"</span> <!-- -->: <span class="lg-highlight-string">"3"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"cpLocation"</span> <!-- -->: <span class="lg-highlight-string">"4"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"cpLocation"</span> <!-- -->: <span class="lg-highlight-string">"-1"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"cpLocation"</span> <!-- -->: <span class="lg-highlight-literal">null</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"cpLocation"</span> <!-- -->: <span class="lg-highlight-literal">null</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/indexOfBytes/#mongodb-expression-exp.-indexOfBytes">
<code class="leafygreen-ui-1l06pbn">
$indexOfBytes
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/indexOfArray/#mongodb-expression-exp.-indexOfArray">
<code class="leafygreen-ui-1l06pbn">
$indexOfArray
</code>
</a>
</p>
</li>
</ul>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/aggregation/function/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$function (aggregation)
<a class="headerlink leafygreen-ui-1kepx47" href="#-function--aggregation-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-function--aggregation-">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#considerations" target="_self">
<span>
Considerations
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="expression">
<dt>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-expression-exp.-function" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-expression-exp.-function">
</div>
</a>
</dt>
<dd>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
Server-side JavaScript Deprecated
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 8.0, server-side JavaScript functions
(
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/accumulator/#mongodb-group-grp.-accumulator">
<code class="leafygreen-ui-1l06pbn">
$accumulator
</code>
</a>
,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/where/#mongodb-query-op.-where">
<code class="leafygreen-ui-1l06pbn">
$where
</code>
</a>
) are
deprecated. MongoDB logs a warning when you run these functions.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Defines a custom aggregation function or expression in JavaScript.
</p>
<p class="leafygreen-ui-1kp3ins">
You can use the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
operator to define custom
functions to implement behavior not supported by the MongoDB Query
Language. See also
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/accumulator/#mongodb-group-grp.-accumulator">
<code class="leafygreen-ui-1l06pbn">
$accumulator
</code>
.
</a>
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Executing JavaScript inside an aggregation expression may
decrease performance. Only use the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
operator if the provided
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation-pipeline/#std-label-aggregation-pipeline-operator-reference">
pipeline operators
</a>
cannot fulfill your
application's needs.
</p>
</div>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
operator has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n $function: {\n body: <code>,\n args: <array>,\n lang: \"js\"\n }\n}</code>","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$function</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">body</span>: <<!-- -->code<!-- -->><!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">args</span>: <span class="lg-highlight-tag lg-highlight-xml"><</span><span class="lg-highlight-name lg-highlight-tag lg-highlight-xml">array</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">expression</span><span class="lg-highlight-tag lg-highlight-xml">></span><span class="lg-highlight-xml">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-xml"> lang: "js"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-xml"> }</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-xml">}</span></td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-function-body" target="_self">
<span>
body
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
String or Code
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-function-body">
</span>
<p class="leafygreen-ui-1kp3ins">
The function definition. You can specify the function
definition as either BSON type Code or String. See also
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-function-lang" target="_self">
<span>
lang
<!-- -->
.
</span>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
function(arg1, arg2, ...) { ... }
</code>
</p>
<p class="leafygreen-ui-1kp3ins">
or
</p>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"function(arg1, arg2, ...) { ... }"
</code>
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-function-args" target="_self">
<span>
args
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-function-args">
</span>
<p class="leafygreen-ui-1kp3ins">
Arguments passed to the function
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-function-body" target="_self">
<span>
body
</span>
</a>
.
If the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-function-body" target="_self">
<span>
body
</span>
</a>
function does not take an
argument, you can specify an empty array
<code class="leafygreen-ui-1l06pbn">
[ ]
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
The array elements can be any BSON type, including Code. See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-function-example-where-alternative" target="_self">
<span>
Example 2: Alternative to
<code class="leafygreen-ui-1l06pbn">
$where
</code>
.
</span>
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-function-lang" target="_self">
<span>
lang
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
String
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-function-lang">
</span>
<p class="leafygreen-ui-1kp3ins">
The language used in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-function-body" target="_self">
<span>
body
</span>
</a>
. You
must specify
<code class="leafygreen-ui-1l06pbn">
lang: "js"
</code>
.
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Considerations
<a class="headerlink leafygreen-ui-1kepx47" href="#considerations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="considerations">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Schema Validation Restriction
<a class="headerlink leafygreen-ui-1kepx47" href="#schema-validation-restriction" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="schema-validation-restriction">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
You cannot use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
as part of a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/schema-validation/specify-query-expression-rules/#std-label-schema-validation-query-expression">
schema
validation
</a>
query predicate.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Javascript Enablement
<a class="headerlink leafygreen-ui-1kepx47" href="#javascript-enablement" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="javascript-enablement">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
, you must have server-side scripting
enabled (default).
</p>
<p class="leafygreen-ui-1kp3ins">
If you do not use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
(or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/accumulator/#mongodb-group-grp.-accumulator">
<code class="leafygreen-ui-1l06pbn">
$accumulator
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/where/#mongodb-query-op.-where">
<code class="leafygreen-ui-1l06pbn">
$where
</code>
</a>
, or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/mapReduce/#mongodb-dbcommand-dbcmd.mapReduce">
<code class="leafygreen-ui-1l06pbn">
mapReduce
</code>
</a>
), disable server-side
scripting:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
For a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instance, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-security.javascriptEnabled">
<code class="leafygreen-ui-1l06pbn">
security.javascriptEnabled
</code>
</a>
configuration option or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--noscripting">
<code class="leafygreen-ui-1l06pbn">
--noscripting
</code>
</a>
command-line option.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
For a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
instance, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-security.javascriptEnabled">
<code class="leafygreen-ui-1l06pbn">
security.javascriptEnabled
</code>
</a>
configuration option or the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-option-mongos.--noscripting">
<code class="leafygreen-ui-1l06pbn">
--noscripting
</code>
</a>
command-line option.
</p>
<div class="line-block">
<div class="line">
In earlier versions, MongoDB does not allow JavaScript execution on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
instances.
</div>
</div>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
See also
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/security-checklist/#std-label-security-checklist-javascript">
➤
<!-- -->
Run MongoDB with Secure Configuration Options
<!-- -->
.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Alternative to
<code class="leafygreen-ui-1l06pbn">
$where
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#alternative-to--where" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="alternative-to--where">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The query operator
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/where/#mongodb-query-op.-where">
<code class="leafygreen-ui-1l06pbn">
$where
</code>
</a>
can also be used to specify
JavaScript expression. However:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/expr/#mongodb-query-op.-expr">
<code class="leafygreen-ui-1l06pbn">
$expr
</code>
</a>
operator allows the use of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
aggregation expressions
</a>
within the
query language.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/accumulator/#mongodb-group-grp.-accumulator">
<code class="leafygreen-ui-1l06pbn">
$accumulator
</code>
</a>
allows users to define
custom aggregation expressions in JavaScript if the provided pipeline
operators cannot fulfill your application's needs.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Given the available aggregation operators:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The use of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/expr/#mongodb-query-op.-expr">
<code class="leafygreen-ui-1l06pbn">
$expr
</code>
</a>
with aggregation operators that do not use
JavaScript (i.e. non-
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
and
non-
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/accumulator/#mongodb-group-grp.-accumulator">
<code class="leafygreen-ui-1l06pbn">
$accumulator
</code>
</a>
operators) is faster than
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/where/#mongodb-query-op.-where">
<code class="leafygreen-ui-1l06pbn">
$where
</code>
</a>
because it does not execute JavaScript and should be preferred if
possible.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
However, if you must create custom expressions,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
is preferred over
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/where/#mongodb-query-op.-where">
<code class="leafygreen-ui-1l06pbn">
$where
</code>
.
</a>
</p>
</li>
</ul>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Unsupported Array and String Functions
<a class="headerlink leafygreen-ui-1kepx47" href="#unsupported-array-and-string-functions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="unsupported-array-and-string-functions">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
MongoDB 6.0 upgrades the internal JavaScript engine used for
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/server-side-javascript/#std-label-server-side-javascript">
server-side JavaScript
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/accumulator/#mongodb-group-grp.-accumulator">
<code class="leafygreen-ui-1l06pbn">
$accumulator
</code>
</a>
,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/where/#mongodb-query-op.-where">
<code class="leafygreen-ui-1l06pbn">
$where
</code>
</a>
expressions and from MozJS-60 to MozJS-91. Several deprecated,
non-standard array and string functions that existed in MozJS-60 are
removed in MozJS-91.
</p>
<p class="leafygreen-ui-1kp3ins">
For the complete list of removed array and string functions, see the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-compatibility/#std-label-6.0-js-engine-change">
6.0 compatibility notes
<!-- -->
.
</a>
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Example 1: Usage Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example-1--usage-example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example-1--usage-example">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Create a sample collection named
<code class="leafygreen-ui-1l06pbn">
players
</code>
with the following
documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.players.insertMany([\n { _id: 1, name: \"Miss Cheevous\", scores: [ 10, 5, 10 ] },\n { _id: 2, name: \"Miss Ann Thrope\", scores: [ 10, 10, 10 ] },\n { _id: 3, name: \"Mrs. Eppie Delta \", scores: [ 9, 8, 8 ] }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">players</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"Miss Cheevous"</span>, <span class="lg-highlight-attr">scores</span>: <!-- -->[ <span class="lg-highlight-number">10</span>, <span class="lg-highlight-number">5</span>, <span class="lg-highlight-number">10</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"Miss Ann Thrope"</span>, <span class="lg-highlight-attr">scores</span>: <!-- -->[ <span class="lg-highlight-number">10</span>, <span class="lg-highlight-number">10</span>, <span class="lg-highlight-number">10</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"Mrs. Eppie Delta "</span>, <span class="lg-highlight-attr">scores</span>: <!-- -->[ <span class="lg-highlight-number">9</span>, <span class="lg-highlight-number">8</span>, <span class="lg-highlight-number">8</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following aggregation operation uses
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/addFields/#mongodb-pipeline-pipe.-addFields">
<code class="leafygreen-ui-1l06pbn">
$addFields
</code>
</a>
to
add new fields to each document:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
isFound
</code>
whose value is determined by the custom
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
expression that checks whether the MD5
hash of the name is equal to a specified hash.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
message
</code>
whose value is determined by the custom
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
expression that format a string message
using a template.
</p>
</li>
</ul>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.players.aggregate( [\n { $addFields:\n {\n isFound:\n { $function:\n {\n body: function(name) {\n return hex_md5(name) == \"15b0a220baa16331e8d80e15367677ad\"\n },\n args: [ \"$name\" ],\n lang: \"js\"\n }\n },\n message:\n { $function:\n {\n body: function(name, scores) {\n let total = Array.sum(scores);\n return `Hello ${name}. Your total score is ${total}.`\n },\n args: [ \"$name\", \"$scores\"],\n lang: \"js\"\n }\n }\n }\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">players</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addFields</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">isFound</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$function</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">body</span>: <span class="lg-highlight-keyword lg-highlight-function">function</span>(<span class="lg-highlight-params">name</span>)<!-- --> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">return</span> <span class="lg-highlight-title lg-highlight-function">hex_md5</span>(<!-- -->name) <!-- -->== <span class="lg-highlight-string">"15b0a220baa16331e8d80e15367677ad"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">args</span>: <!-- -->[ <span class="lg-highlight-string">"$name"</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">lang</span>: <span class="lg-highlight-string">"js"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">message</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$function</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">body</span>: <span class="lg-highlight-keyword lg-highlight-function">function</span>(<span class="lg-highlight-params">name, scores</span>)<!-- --> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">let</span> total <!-- -->= <span class="lg-highlight-title lg-highlight-class">Array</span>.<span class="lg-highlight-title lg-highlight-function">sum</span>(<!-- -->scores)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">return</span> <span class="lg-highlight-string">`Hello </span><span class="lg-highlight-subst lg-highlight-string">${name}</span><span class="lg-highlight-string">. Your total score is </span><span class="lg-highlight-subst lg-highlight-string">${total}</span><span class="lg-highlight-string">.`</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">args</span>: <!-- -->[ <span class="lg-highlight-string">"$name"</span>, <span class="lg-highlight-string">"$scores"</span>]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">lang</span>: <span class="lg-highlight-string">"js"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"name\" : \"Miss Cheevous\", \"scores\" : [ 10, 5, 10 ], \"isFound\" : false, \"message\" : \"Hello Miss Cheevous. Your total score is 25.\" }\n{ \"_id\" : 2, \"name\" : \"Miss Ann Thrope\", \"scores\" : [ 10, 10, 10 ], \"isFound\" : true, \"message\" : \"Hello Miss Ann Thrope. Your total score is 30.\" }\n{ \"_id\" : 3, \"name\" : \"Mrs. Eppie Delta \", \"scores\" : [ 9, 8, 8 ], \"isFound\" : false, \"message\" : \"Hello Mrs. Eppie Delta . Your total score is 25.\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"name"</span> <!-- -->: <span class="lg-highlight-string">"Miss Cheevous"</span>, <span class="lg-highlight-string">"scores"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">10</span>, <span class="lg-highlight-number">5</span>, <span class="lg-highlight-number">10</span> ]<!-- -->, <span class="lg-highlight-string">"isFound"</span> <!-- -->: <span class="lg-highlight-literal">false</span>, <span class="lg-highlight-string">"message"</span> <!-- -->: <span class="lg-highlight-string">"Hello Miss Cheevous. Your total score is 25."</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"name"</span> <!-- -->: <span class="lg-highlight-string">"Miss Ann Thrope"</span>, <span class="lg-highlight-string">"scores"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">10</span>, <span class="lg-highlight-number">10</span>, <span class="lg-highlight-number">10</span> ]<!-- -->, <span class="lg-highlight-string">"isFound"</span> <!-- -->: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-string">"message"</span> <!-- -->: <span class="lg-highlight-string">"Hello Miss Ann Thrope. Your total score is 30."</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"name"</span> <!-- -->: <span class="lg-highlight-string">"Mrs. Eppie Delta "</span>, <span class="lg-highlight-string">"scores"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">9</span>, <span class="lg-highlight-number">8</span>, <span class="lg-highlight-number">8</span> ]<!-- -->, <span class="lg-highlight-string">"isFound"</span> <!-- -->: <span class="lg-highlight-literal">false</span>, <span class="lg-highlight-string">"message"</span> <!-- -->: <span class="lg-highlight-string">"Hello Mrs. Eppie Delta . Your total score is 25."</span> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-function-example-where-alternative">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Example 2: Alternative to
<code class="leafygreen-ui-1l06pbn">
$where
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#example-2--alternative-to--where" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example-2--alternative-to--where">
</div>
</a>
</h3>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
Aggregation Alternatives Preferred over $where
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/expr/#mongodb-query-op.-expr">
<code class="leafygreen-ui-1l06pbn">
$expr
</code>
</a>
operator allows the use of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
aggregation expressions
</a>
within the
query language. And the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/accumulator/#mongodb-group-grp.-accumulator">
<code class="leafygreen-ui-1l06pbn">
$accumulator
</code>
</a>
allows users to define custom aggregation expressions in JavaScript if the
provided pipeline operators cannot fulfill your application's needs.
</p>
<p class="leafygreen-ui-1kp3ins">
Given the available aggregation operators:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The use of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/expr/#mongodb-query-op.-expr">
<code class="leafygreen-ui-1l06pbn">
$expr
</code>
</a>
with aggregation operators that do not
use JavaScript (i.e. non-
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
and
non-
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/accumulator/#mongodb-group-grp.-accumulator">
<code class="leafygreen-ui-1l06pbn">
$accumulator
</code>
</a>
operators) is faster than
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/where/#mongodb-query-op.-where">
<code class="leafygreen-ui-1l06pbn">
$where
</code>
</a>
because it does not execute JavaScript and should
be preferred if possible.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
However, if you must create custom expressions,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
is preferred over
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/where/#mongodb-query-op.-where">
<code class="leafygreen-ui-1l06pbn">
$where
</code>
.
</a>
</p>
</li>
</ul>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
As an alternative to a query that uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/where/#mongodb-query-op.-where">
<code class="leafygreen-ui-1l06pbn">
$where
</code>
</a>
operator,
you can use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/expr/#mongodb-query-op.-expr">
<code class="leafygreen-ui-1l06pbn">
$expr
</code>
</a>
and
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</span>
</a>
. For example,
consider the following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/where/#mongodb-query-op.-where">
<code class="leafygreen-ui-1l06pbn">
$where
</code>
</a>
example.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.players.find( { $where: function() {\n return (hex_md5(this.name) == \"15b0a220baa16331e8d80e15367677ad\")\n} } );","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">players</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">$where</span>: <span class="lg-highlight-keyword lg-highlight-function">function</span>(<!-- -->)<!-- --> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">return</span> <!-- -->(<span class="lg-highlight-title lg-highlight-function">hex_md5</span>(<span class="lg-highlight-variable lg-highlight-language">this</span>.<span class="lg-highlight-property">name</span>) <!-- -->== <span class="lg-highlight-string">"15b0a220baa16331e8d80e15367677ad"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} } )<!-- -->;</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
db.collection.find()
</code>
</a>
operation returns the following document:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 2, \"name\" : \"Miss Ann Thrope\", \"scores\" : [ 10, 10, 10 ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1agdxuk" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"name"</span> <!-- -->: <span class="lg-highlight-string">"Miss Ann Thrope"</span>, <span class="lg-highlight-string">"scores"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">10</span>, <span class="lg-highlight-number">10</span>, <span class="lg-highlight-number">10</span> ] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The example can be expressed using
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/expr/#mongodb-query-op.-expr">
<code class="leafygreen-ui-1l06pbn">
$expr
</code>
</a>
and
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-function" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$function
</code>
:
</span>
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.players.find( {$expr: { $function: {\n body: function(name) { return hex_md5(name) == \"15b0a220baa16331e8d80e15367677ad\"; },\n args: [ \"$name\" ],\n lang: \"js\"\n} } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">players</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{<span class="lg-highlight-attr">$expr</span>: <!-- -->{ <span class="lg-highlight-attr">$function</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">body</span>: <span class="lg-highlight-keyword lg-highlight-function">function</span>(<span class="lg-highlight-params">name</span>)<!-- --> <!-- -->{ <span class="lg-highlight-keyword">return</span> <span class="lg-highlight-title lg-highlight-function">hex_md5</span>(<!-- -->name) <!-- -->== <span class="lg-highlight-string">"15b0a220baa16331e8d80e15367677ad"</span>; <!-- -->}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">args</span>: <!-- -->[ <span class="lg-highlight-string">"$name"</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">lang</span>: <span class="lg-highlight-string">"js"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">} } } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/update/addToSet/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$addToSet
<a class="headerlink leafygreen-ui-1kepx47" href="#-addtoset" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-addtoset">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="update">
<dt>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-update-up.-addToSet" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-update-up.-addToSet">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
operator adds a value to an array unless the value
is already present, in which case
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
does nothing to that
array.
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can use
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
for deployments hosted in the following
environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
operator has the form:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $addToSet: { <field1>: <value1>, ... } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$addToSet</span>: <!-- -->{ <<!-- -->field1<!-- -->><!-- -->: <<!-- -->value1<!-- -->><!-- -->,<!-- --> <!-- -->...<!-- --> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To specify a
<code class="leafygreen-ui-1l06pbn">
<field>
</code>
in an embedded document or in an array, use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/document/#std-label-document-dot-notation">
dot notation
<!-- -->
.
</a>
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0, update operators process document fields with
string-based names in lexicographic order. Fields with numeric names are
processed in numeric order. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/#std-label-update-operators-processing-order">
Update Operators Behavior
</a>
for details.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
only ensures that there are no duplicate items
<em>
added
</em>
to the set and does not affect existing duplicate elements.
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
does not guarantee a particular ordering of
elements in the modified set.
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
no longer raises an
error when you use an update operator like
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
with an empty operand expression (
<code class="leafygreen-ui-1l06pbn">
{ }
</code>
). An empty update results
in no changes and no
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-oplog">
oplog
</a>
entry is created (meaning that the
operation is a no-op).
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Missing Field
<a class="headerlink leafygreen-ui-1kepx47" href="#missing-field" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="missing-field">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If you use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
on a field that is absent from the
document to update,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
creates the array field with
the specified value as its element.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Field is Not an Array
<a class="headerlink leafygreen-ui-1kepx47" href="#field-is-not-an-array" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="field-is-not-an-array">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If you use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
on a field that is
<strong>
not
</strong>
an array, the
operation will fail.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, create the
<code class="leafygreen-ui-1l06pbn">
pigments
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.pigments.insertOne( { _id: 1, colors: \"blue, green, red\" } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">pigments</span>.<span class="lg-highlight-title lg-highlight-function">insertOne</span>( <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">colors</span>: <span class="lg-highlight-string">"blue, green, red"</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
colors
</code>
field is not an array. The following
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
operation fails:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.pigments.updateOne(\n { _id: 1 },\n { $addToSet: { colors: \"mauve\" } }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">pigments</span>.<span class="lg-highlight-title lg-highlight-function">updateOne</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addToSet</span>: <!-- -->{ <span class="lg-highlight-attr">colors</span>: <span class="lg-highlight-string">"mauve"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Value to Add is An Array
<a class="headerlink leafygreen-ui-1kepx47" href="#value-to-add-is-an-array" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="value-to-add-is-an-array">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If the value is an array,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
appends the whole array
as a
<em>
single
</em>
element.
</p>
<p class="leafygreen-ui-1kp3ins">
Create the
<code class="leafygreen-ui-1l06pbn">
alphabet
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.alphabet.insertOne( { _id: 1, letters: [\"a\", \"b\"] } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">alphabet</span>.<span class="lg-highlight-title lg-highlight-function">insertOne</span>( <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">letters</span>: <!-- -->[<span class="lg-highlight-string">"a"</span>, <span class="lg-highlight-string">"b"</span>] } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following operation appends the array
<code class="leafygreen-ui-1l06pbn">
[ "c", "d" ]
</code>
to the
<code class="leafygreen-ui-1l06pbn">
letters
</code>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.alphabet.updateOne(\n { _id: 1 },\n { $addToSet: { letters: [ \"c\", \"d\" ] } }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">alphabet</span>.<span class="lg-highlight-title lg-highlight-function">updateOne</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addToSet</span>: <!-- -->{ <span class="lg-highlight-attr">letters</span>: <!-- -->[ <span class="lg-highlight-string">"c"</span>, <span class="lg-highlight-string">"d"</span> ] } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The array
<code class="leafygreen-ui-1l06pbn">
[ "c", "d" ]
</code>
is added as a single element:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ _id: 1, letters: [ 'a', 'b', [ 'c', 'd' ] ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">letters</span>: <!-- -->[ <span class="lg-highlight-string">'a'</span>, <span class="lg-highlight-string">'b'</span>, <!-- -->[ <span class="lg-highlight-string">'c'</span>, <span class="lg-highlight-string">'d'</span> ] ] }</td></tr></tbody></table></code></pre>
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
To add each element of the value
<strong>
separately
</strong>
, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/each/#mongodb-update-up.-each">
<code class="leafygreen-ui-1l06pbn">
$each
</code>
</a>
modifier with
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
. See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-addToSet-modifiers" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$each
</code>
Modifier
</span>
</a>
for details.
</p>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Value to Add is a Document
<a class="headerlink leafygreen-ui-1kepx47" href="#value-to-add-is-a-document" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="value-to-add-is-a-document">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If the value is a document, MongoDB determines that the document is a
duplicate if an existing document in the array matches the to-be-added
document exactly; i.e. the existing document has the exact same fields
and values
<em>
and
</em>
the fields are in the same order. As such, field order
matters and you cannot specify that MongoDB compare only a subset of
the fields in the document to determine whether the document is a
duplicate of an existing array element.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.insertOne(\n { _id: 1, item: \"polarizing_filter\", tags: [ \"electronics\", \"camera\" ] }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">insertOne</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"polarizing_filter"</span>, <span class="lg-highlight-attr">tags</span>: <!-- -->[ <span class="lg-highlight-string">"electronics"</span>, <span class="lg-highlight-string">"camera"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Add to Array
<a class="headerlink leafygreen-ui-1kepx47" href="#add-to-array" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="add-to-array">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following operation adds the element
<code class="leafygreen-ui-1l06pbn">
"accessories"
</code>
to the
<code class="leafygreen-ui-1l06pbn">
tags
</code>
array since
<code class="leafygreen-ui-1l06pbn">
"accessories"
</code>
does not exist in the array:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.updateOne(\n { _id: 1 },\n { $addToSet: { tags: \"accessories\" } }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">updateOne</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addToSet</span>: <!-- -->{ <span class="lg-highlight-attr">tags</span>: <span class="lg-highlight-string">"accessories"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Value Already Exists
<a class="headerlink leafygreen-ui-1kepx47" href="#value-already-exists" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="value-already-exists">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
operation has no effect because
<code class="leafygreen-ui-1l06pbn">
"camera"
</code>
is already an element of the
<code class="leafygreen-ui-1l06pbn">
tags
</code>
array:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.updateOne(\n { _id: 1 },\n { $addToSet: { tags: \"camera\" } }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">updateOne</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addToSet</span>: <!-- -->{ <span class="lg-highlight-attr">tags</span>: <span class="lg-highlight-string">"camera"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-addToSet-modifiers">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
$each
</code>
Modifier
<a class="headerlink leafygreen-ui-1kepx47" href="#-each-modifier" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-each-modifier">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
You can use the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
operator with the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/each/#mongodb-update-up.-each">
<code class="leafygreen-ui-1l06pbn">
$each
</code>
</a>
modifier. The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/each/#mongodb-update-up.-each">
<code class="leafygreen-ui-1l06pbn">
$each
</code>
</a>
modifier allows the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
operator to add multiple values to the array
field.
</p>
<p class="leafygreen-ui-1kp3ins">
A collection
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
has the following document:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ _id: 2, item: \"cable\", tags: [ \"electronics\", \"supplies\" ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"cable"</span>, <span class="lg-highlight-attr">tags</span>: <!-- -->[ <span class="lg-highlight-string">"electronics"</span>, <span class="lg-highlight-string">"supplies"</span> ] }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Then the following operation uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
operator
with the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/each/#mongodb-update-up.-each">
<code class="leafygreen-ui-1l06pbn">
$each
</code>
</a>
modifier to add multiple elements to the
<code class="leafygreen-ui-1l06pbn">
tags
</code>
array:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.updateOne(\n { _id: 2 },\n { $addToSet: { tags: { $each: [ \"camera\", \"electronics\", \"accessories\" ] } } }\n )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">updateOne</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addToSet</span>: <!-- -->{ <span class="lg-highlight-attr">tags</span>: <!-- -->{ <span class="lg-highlight-attr">$each</span>: <!-- -->[ <span class="lg-highlight-string">"camera"</span>, <span class="lg-highlight-string">"electronics"</span>, <span class="lg-highlight-string">"accessories"</span> ] } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation only adds
<code class="leafygreen-ui-1l06pbn">
"camera"
</code>
and
<code class="leafygreen-ui-1l06pbn">
"accessories"
</code>
to the
<code class="leafygreen-ui-1l06pbn">
tags
</code>
array.
<code class="leafygreen-ui-1l06pbn">
"electronics"
</code>
was already in the array:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n _id: 2,\n item: \"cable\",\n tags: [ \"electronics\", \"supplies\", \"camera\", \"accessories\" ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"cable"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">tags</span>: <!-- -->[ <span class="lg-highlight-string">"electronics"</span>, <span class="lg-highlight-string">"supplies"</span>, <span class="lg-highlight-string">"camera"</span>, <span class="lg-highlight-string">"accessories"</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
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<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.updateMany/#mongodb-method-db.collection.updateMany">
<code class="leafygreen-ui-1l06pbn">
db.collection.updateMany()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.findAndModify/#mongodb-method-db.collection.findAndModify">
<code class="leafygreen-ui-1l06pbn">
db.collection.findAndModify()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/push/#mongodb-update-up.-push">
<code class="leafygreen-ui-1l06pbn">
$push
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/pull/#mongodb-update-up.-pull">
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
</a>
</p>
</li>
</ul>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/db.collection.deleteOne/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
db.collection.deleteOne()
<a class="headerlink leafygreen-ui-1kepx47" href="#db.collection.deleteone--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="db.collection.deleteone--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<div class="leafygreen-ui-147elvs">
<p class="leafygreen-ui-1ronz74">
MongoDB with drivers
</p>
<div class="leafygreen-ui-18k5rfm">
<p class="leafygreen-ui-1kp3ins">
This page documents a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
method. To see the equivalent
method in a MongoDB driver, see the corresponding page for your
programming language:
</p>
</div>
<div class="leafygreen-ui-zgrwqu notranslate">
<a class="leafygreen-ui-v22cck" href="https://www.mongodb.com/docs/drivers/csharp/current/usage-examples/deleteOne/" target="_self">
<svg class="leafygreen-ui-x3zji3" fill="none" height="24" viewbox="0 0 28 29" width="24" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_1351_59964)">
<g clip-path="url(#clip1_1351_59964)">
<path d="M25.7709 9.2495C25.7709 8.79827 25.678 8.39408 25.4827 8.04627C25.2874 7.70785 25.0084 7.42586 24.627 7.20025C21.465 5.35781 18.2937 3.51538 15.1317 1.67295C14.2761 1.17474 13.4484 1.19354 12.6021 1.70115C11.3466 2.45316 5.04112 6.10042 3.15321 7.20025C2.3813 7.65142 2 8.34705 2 9.24005C2 12.9531 2 16.6568 2 20.3698C2 20.8117 2.093 21.2064 2.279 21.5449C2.4743 21.8927 2.7626 22.1841 3.15321 22.4191C5.03182 23.5189 11.3373 27.1662 12.6021 27.9182C13.4484 28.4258 14.2761 28.4446 15.1317 27.9463C18.2937 26.1039 21.465 24.2615 24.627 22.4191C25.0177 22.1935 25.306 21.9021 25.5012 21.5449C25.6873 21.2064 25.7803 20.8117 25.7803 20.3698C25.7709 20.3698 25.7709 12.9531 25.7709 9.2495Z" fill="#A179DC">
</path>
<path d="M13.9227 14.7673L2.27905 21.5449C2.47435 21.8927 2.76265 22.1841 3.15326 22.4191C5.03187 23.5189 11.3373 27.1662 12.6021 27.9182C13.4484 28.4258 14.2762 28.4445 15.1317 27.9463C18.2938 26.1039 21.4651 24.2615 24.6271 22.4191C25.0177 22.1935 25.306 21.9021 25.5013 21.5449L13.9227 14.7673Z" fill="#280068">
</path>
<path d="M25.7711 9.24949C25.7711 8.79827 25.6781 8.39408 25.4828 8.04626L13.9229 14.7768L25.4921 21.5543C25.6781 21.2159 25.7711 20.8211 25.7711 20.3793C25.7711 20.3699 25.7711 12.9531 25.7711 9.24949Z" fill="#390091">
</path>
<path d="M20.7771 12.2387V13.5078H22.0325V12.2387H22.6557V13.5078H23.9111V14.1376H22.6557V15.4066H23.9111V16.0364H22.6557V17.3054H22.0325V16.0364H20.7771V17.3054H20.1539V16.0364H18.8984V15.4066H20.1539V14.1376H18.8984V13.5078H20.1539V12.2387H20.7771ZM22.0325 14.1376H20.7771V15.4066H22.0325V14.1376Z" fill="white">
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<path d="M13.9508 5.87482C17.2151 5.87482 20.0702 7.67022 21.6047 10.3399L21.5861 10.3117L17.7452 12.5489C16.9919 11.2517 15.5969 10.3775 14.0066 10.3587H13.9601C11.5328 10.3587 9.56116 12.3515 9.56116 14.805C9.56116 15.604 9.77503 16.3654 10.1377 17.014C10.9004 18.3488 12.3232 19.2512 13.9601 19.2512C15.6062 19.2512 17.0384 18.3394 17.7917 16.9858L17.7731 17.014L21.614 19.2606C20.0981 21.9021 17.2895 23.6975 14.0531 23.7257H13.9508C10.6679 23.7257 7.81274 21.9209 6.28753 19.2418C5.54353 17.9352 5.11572 16.4124 5.11572 14.7956C5.11572 9.87931 9.06825 5.87482 13.9508 5.87482Z" fill="white">
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<defs>
<clippath id="clip0_1351_59964">
<rect fill="white" height="28" transform="translate(0 0.809265)" width="28">
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<clippath id="clip1_1351_59964">
<rect fill="white" height="27" transform="translate(2 1.30966)" width="24">
</rect>
</clippath>
</defs>
</svg>
<span>
C#
</span>
</a>
<a class="leafygreen-ui-v22cck" href="https://www.mongodb.com/docs/drivers/java/sync/current/usage-examples/deleteOne/" target="_self">
<svg class="leafygreen-ui-x3zji3" fill="none" height="24" viewbox="0 0 30 41" width="24" xmlns="http://www.w3.org/2000/svg">
<path d="M10.0921 30.7949C10.0921 30.7949 8.57608 31.6793 11.166 31.9636C14.2929 32.311 15.9037 32.2794 19.3464 31.6161C19.3464 31.6161 20.2623 32.1846 21.5257 32.6901C13.7876 35.9748 4.02791 32.5005 10.0921 30.7949Z" fill="#0074BD">
</path>
<path d="M9.14539 26.4678C9.14539 26.4678 7.43985 27.7312 10.0298 27.9838C13.3778 28.3312 15.9992 28.3628 20.579 27.4785C20.579 27.4785 21.2107 28.1101 22.1898 28.4576C12.8724 31.2054 2.44949 28.6787 9.14539 26.4678Z" fill="#0074BD">
</path>
<path d="M17.1039 19.1398C18.9989 21.3191 16.5985 23.3089 16.5985 23.3089C16.5985 23.3089 21.431 20.8138 19.2201 17.6869C17.1355 14.7811 15.5563 13.3282 24.1788 8.33789C24.1473 8.33789 10.6607 11.6858 17.1039 19.1398Z" fill="#EA2D2E">
</path>
<path d="M27.3377 33.9845C27.3377 33.9845 28.4431 34.9004 26.1059 35.6269C21.6525 36.985 7.53417 37.3957 3.61769 35.6901C2.19639 35.0899 4.84949 34.2372 5.67069 34.0477C6.52347 33.8582 7.02884 33.8898 7.02884 33.8898C5.44961 32.7843 -3.10981 36.0691 2.67016 36.9851C18.4308 39.5433 31.4121 35.8164 27.3377 33.9845Z" fill="#0074BD">
</path>
<path d="M10.8194 21.983C10.8194 21.983 3.6497 23.6885 8.2926 24.3203C10.2509 24.5729 14.1357 24.5097 17.7995 24.2255C20.7685 23.9728 23.7375 23.4359 23.7375 23.4359C23.7375 23.4359 22.6951 23.8781 21.9372 24.415C14.6411 26.3416 0.585992 25.4257 4.62881 23.4675C8.00839 21.7935 10.8194 21.983 10.8194 21.983Z" fill="#0074BD">
</path>
<path d="M23.6745 29.1846C31.0969 25.3313 27.6542 21.6359 25.2538 22.1413C24.6537 22.2676 24.401 22.3623 24.401 22.3623C24.401 22.3623 24.6221 22.0149 25.0327 21.8886C29.7703 20.2146 33.4025 26.7842 23.5166 29.4057C23.5482 29.3741 23.6429 29.2794 23.6745 29.1846Z" fill="#0074BD">
</path>
<path d="M19.2206 0.25293C19.2206 0.25293 23.3266 4.35891 15.3357 10.6758C8.92404 15.7293 13.8828 18.6351 15.3357 21.9199C11.6087 18.5403 8.86088 15.5714 10.6928 12.792C13.3775 8.74919 20.863 6.79093 19.2206 0.25293Z" fill="#EA2D2E">
</path>
<path d="M11.5455 39.6068C18.6521 40.049 29.5803 39.3541 29.833 35.9746C29.833 35.9746 29.3276 37.238 23.9583 38.2487C17.894 39.3858 10.4085 39.2594 5.95508 38.533C5.95508 38.5646 6.87103 39.3225 11.5455 39.6068Z" fill="#0074BD">
</path>
</svg>
<span>
Java Sync
</span>
</a>
<a class="leafygreen-ui-v22cck" href="https://www.mongodb.com/docs/drivers/node/current/usage-examples/deleteOne/" target="_self">
<svg class="leafygreen-ui-x3zji3" fill="none" height="24" viewbox="0 0 30 30" width="24" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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<g mask="url(#mask0_2131_12968)">
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</mask>
<g mask="url(#mask1_2131_12968)">
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</path>
<path d="M15.6643 22.2362C14.4775 22.2362 14.2334 21.6946 14.2334 21.2343C14.2334 21.1936 14.2673 21.153 14.3147 21.153H14.6674C14.7081 21.153 14.742 21.1801 14.742 21.2207C14.7963 21.5795 14.9522 21.7555 15.671 21.7555C16.2407 21.7555 16.4847 21.6269 16.4847 21.3223C16.4847 21.1462 16.4169 21.0177 15.5286 20.9297C14.7895 20.8552 14.3284 20.6928 14.3284 20.1038C14.3284 19.5555 14.7895 19.2305 15.5625 19.2305C16.4305 19.2305 16.8577 19.5284 16.912 20.1782C16.912 20.1986 16.9052 20.2189 16.8916 20.2392C16.8781 20.2527 16.8577 20.2663 16.8374 20.2663H16.4779C16.4441 20.2663 16.4101 20.2392 16.4034 20.2053C16.322 19.833 16.1118 19.7111 15.5557 19.7111C14.9319 19.7111 14.8573 19.9278 14.8573 20.0902C14.8573 20.2866 14.9454 20.3475 15.7863 20.4558C16.6204 20.5641 17.0137 20.7198 17.0137 21.302C17.0137 21.8977 16.5187 22.2362 15.6643 22.2362Z" fill="black">
</path>
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Node.js
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PyMongo
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C++
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Go
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<a class="leafygreen-ui-18cpm0b" href="https://www.mongodb.com/docs/languages/java/reactive-streams-driver/current/write/write-delete-documents/#delete-one-document" target="_self">
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Java RS
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Kotlin Coroutine
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Kotlin Sync
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PHP
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</svg>
<span>
Mongoid
</span>
</a>
<a class="leafygreen-ui-18cpm0b" href="https://www.mongodb.com/docs/drivers/rust/current/fundamentals/crud/write-operations/delete/" target="_self">
<svg class="leafygreen-ui-x3zji3" height="24" viewbox="0 0 30 30" width="24" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_5454_14623)">
<path d="M15.2561 3.08398C8.56014 3.08398 3.11035 8.53634 3.11035 15.2297C3.11035 21.9231 8.56271 27.3755 15.2561 27.3755C21.9495 27.3755 27.4019 21.9231 27.4019 15.2297C27.4019 8.53634 21.9495 3.08398 15.2561 3.08398ZM15.2381 4.16315C15.4458 4.16853 15.6432 4.25509 15.7881 4.40437C15.9331 4.55365 16.0142 4.75384 16.0141 4.96225C16.0141 5.17418 15.9299 5.37744 15.7801 5.5273C15.6302 5.67715 15.4269 5.76134 15.215 5.76134C15.0031 5.76134 14.7998 5.67715 14.65 5.5273C14.5001 5.37744 14.4159 5.17418 14.4159 4.96225C14.4159 4.85533 14.4373 4.7495 14.4789 4.65101C14.5205 4.55252 14.5814 4.46338 14.6581 4.38887C14.7347 4.31435 14.8256 4.25598 14.9252 4.21721C15.0249 4.17844 15.1313 4.16006 15.2381 4.16315ZM17.0676 5.47871C18.4704 5.74146 19.7992 6.30644 20.9617 7.13439C22.1242 7.96235 23.0926 9.03345 23.7995 10.2733L22.8565 12.4008C22.6947 12.7682 22.8617 13.1999 23.2265 13.3643L25.0406 14.1686C25.0968 14.7356 25.1037 15.3065 25.0611 15.8747H24.0513C23.9511 15.8747 23.91 15.9415 23.91 16.0391V16.5016C23.91 17.5911 23.2959 17.83 22.7563 17.8891C22.2424 17.9482 21.6746 17.6733 21.6026 17.3598C21.2994 15.6563 20.7958 15.294 19.9993 14.6645C20.9885 14.0375 22.0163 13.11 22.0163 11.8715C22.0163 10.5328 21.099 9.69002 20.4747 9.27634C19.5959 8.69822 18.6247 8.5826 18.3626 8.5826H7.93063C9.37312 6.97114 11.3066 5.88021 13.4318 5.47871L14.6626 6.76857C14.9401 7.05891 15.4 7.07176 15.6903 6.79169L17.0676 5.47871ZM5.71063 11.3936C5.91853 11.3996 6.11589 11.4864 6.26079 11.6356C6.40568 11.7849 6.48669 11.9847 6.4866 12.1927C6.4866 12.4046 6.40241 12.6079 6.25255 12.7577C6.10269 12.9076 5.89944 12.9918 5.6875 12.9918C5.47557 12.9918 5.27232 12.9076 5.12246 12.7577C4.9726 12.6079 4.88841 12.4046 4.88841 12.1927C4.88836 12.0858 4.90977 11.9799 4.95137 11.8814C4.99297 11.7829 5.0539 11.6938 5.13057 11.6193C5.20724 11.5448 5.29809 11.4864 5.39772 11.4476C5.49736 11.4089 5.60376 11.3905 5.71063 11.3936ZM24.7631 11.4295C24.971 11.4356 25.1683 11.5224 25.3132 11.6716C25.4581 11.8208 25.5391 12.0206 25.539 12.2286C25.539 12.4406 25.4548 12.6438 25.305 12.7937C25.1551 12.9435 24.9519 13.0277 24.7399 13.0277C24.528 13.0277 24.3247 12.9435 24.1749 12.7937C24.025 12.6438 23.9408 12.4406 23.9408 12.2286C23.9408 12.1217 23.9622 12.0159 24.0038 11.9174C24.0454 11.8189 24.1063 11.7298 24.183 11.6553C24.2597 11.5807 24.3505 11.5224 24.4502 11.4836C24.5498 11.4448 24.6562 11.4264 24.7631 11.4295ZM7.21632 11.558H8.60896V17.8377H5.79799C5.45083 16.6186 5.34264 15.3439 5.47938 14.0838L7.20091 13.3181C7.56834 13.1536 7.73535 12.7245 7.57091 12.3571L7.21632 11.558ZM13.0284 11.6248H16.3456C16.5177 11.6248 17.5558 11.8227 17.5558 12.6012C17.5558 13.2461 16.7592 13.4774 16.104 13.4774H13.0258L13.0284 11.6248ZM13.0284 16.1368H15.5696C15.8008 16.1368 16.8106 16.2036 17.1318 17.4934C17.232 17.8891 17.4556 19.179 17.6072 19.5927C17.7588 20.0552 18.3729 20.9802 19.0281 20.9802H23.1751C22.8972 21.3524 22.5933 21.7044 22.2656 22.0336L20.5774 21.6713C20.1843 21.5866 19.7963 21.8384 19.7115 22.2315L19.3107 24.102C18.0217 24.6859 16.622 24.9848 15.2069 24.9781C13.7919 24.9714 12.395 24.6595 11.1116 24.0635L10.7108 22.1929C10.626 21.7998 10.2406 21.548 9.84743 21.6328L8.19528 21.9874C7.88869 21.6711 7.6037 21.3346 7.34223 20.9802H15.3769C15.4668 20.9802 15.5285 20.9647 15.5285 20.88V18.0381C15.5285 17.9559 15.4668 17.9379 15.3769 17.9379H13.0258L13.0284 16.1368ZM9.3207 22.6452C9.5286 22.6512 9.72596 22.738 9.87085 22.8872C10.0157 23.0364 10.0968 23.2363 10.0967 23.4443C10.0967 23.6562 10.0125 23.8594 9.86262 24.0093C9.71276 24.1592 9.50951 24.2434 9.29757 24.2434C9.08564 24.2434 8.88239 24.1592 8.73253 24.0093C8.58267 23.8594 8.49848 23.6562 8.49848 23.4443C8.49843 23.3373 8.51984 23.2315 8.56144 23.133C8.60303 23.0345 8.66397 22.9454 8.74064 22.8709C8.81731 22.7964 8.90815 22.738 9.00779 22.6992C9.10743 22.6605 9.21383 22.6421 9.3207 22.6452ZM21.153 22.6811C21.3609 22.6872 21.5583 22.774 21.7031 22.9232C21.848 23.0724 21.929 23.2722 21.929 23.4802C21.929 23.6922 21.8448 23.8954 21.6949 24.0453C21.5451 24.1951 21.3418 24.2793 21.1299 24.2793C20.9179 24.2793 20.7147 24.1951 20.5648 24.0453C20.415 23.8954 20.3308 23.6922 20.3308 23.4802C20.3307 23.3733 20.3521 23.2675 20.3937 23.169C20.4353 23.0705 20.4963 22.9814 20.5729 22.9068C20.6496 22.8323 20.7404 22.774 20.8401 22.7352C20.9397 22.6964 21.0461 22.678 21.153 22.6811Z" fill="black">
</path>
<path clip-rule="evenodd" d="M26.7232 15.2304C26.7232 18.2717 25.515 21.1885 23.3645 23.3391C21.2139 25.4896 18.2971 26.6978 15.2558 26.6978C12.2144 26.6978 9.29761 25.4896 7.14705 23.3391C4.99649 21.1885 3.78832 18.2717 3.78832 15.2304C3.78832 12.189 4.99649 9.27222 7.14705 7.12166C9.29761 4.9711 12.2144 3.76293 15.2558 3.76293C18.2971 3.76293 21.2139 4.9711 23.3645 7.12166C25.515 9.27222 26.7232 12.189 26.7232 15.2304ZM26.5073 14.1229L28.2957 15.2304L26.5073 16.3378L28.0439 17.7741L26.0757 18.5115L27.3039 20.2202L25.2252 20.5594L26.0988 22.4762L23.9944 22.4017L24.4775 24.4521L22.4271 23.969L22.5016 26.0734L20.5848 25.1998L20.2456 27.2785L18.5369 26.0503L17.7995 28.0185L16.3632 26.482L15.2558 28.2703L14.1483 26.482L12.712 28.0185L11.9746 26.0503L10.2659 27.2785L9.92672 25.1998L8.00992 26.0734L8.08443 23.969L6.03401 24.4521L6.51707 22.4017L4.4127 22.4762L5.28631 20.5594L3.20763 20.2202L4.43582 18.5115L2.46763 17.7741L4.00415 16.3378L2.21582 15.2304L4.00415 14.1229L2.46763 12.6866L4.43582 11.9492L3.20763 10.2405L5.28631 9.90133L4.4127 7.98453L6.51707 8.05904L6.03401 6.00862L8.08443 6.49168L8.00992 4.3873L9.92672 5.26092L10.2659 3.18223L11.9746 4.41043L12.712 2.44224L14.1483 3.97876L15.2558 2.19043L16.3632 3.97876L17.7995 2.44224L18.5369 4.41043L20.2456 3.18223L20.5848 5.26092L22.5016 4.3873L22.4271 6.49168L24.4775 6.00862L23.9944 8.05904L26.0988 7.98453L25.2252 9.90133L27.3039 10.2405L26.0757 11.9492L28.0439 12.6866L26.5073 14.1229Z" fill="black" fill-rule="evenodd" stroke-linecap="round" stroke-linejoin="round">
</path>
</g>
<defs>
<clippath id="clip0_5454_14623">
<rect fill="black" height="30" width="30">
</rect>
</clippath>
</defs>
</svg>
<span>
Rust
</span>
</a>
<a class="leafygreen-ui-18cpm0b" href="https://www.mongodb.com/docs/languages/scala/scala-driver/current/get-started/quickstart/#delete-documents" target="_self">
<svg class="leafygreen-ui-x3zji3" height="24" viewbox="0 0 70 70" width="24" xmlns="http://www.w3.org/2000/svg">
<defs>
<lineargradient id=":R3ltlqcmqn9:aaa" x1=".006%" x2="96.837%" y1="49.998%" y2="49.998%">
<stop offset="0%" stop-color="#CD413F">
</stop>
<stop offset="75.091%" stop-color="#CD4543">
</stop>
<stop offset="100%" stop-color="#D04543">
</stop>
</lineargradient>
</defs>
<g fill="none" fill-rule="nonzero">
<path d="M13 39v5c0 .843 17.73 2.255 29.28 5 5.582-1.327 9.72-2.966 9.72-5v-5c0-2.034-4.138-3.673-9.72-5C30.73 36.745 13 38.157 13 39M13 20v5c0 .843 17.73 2.255 29.28 5 5.582-1.327 9.72-2.966 9.72-5v-5c0-2.034-4.138-3.673-9.72-5C30.73 17.745 13 19.157 13 20" fill="#731818">
</path>
<g fill="url(#:R3ltlqcmqn9:aaa)" transform="translate(13)">
<path d="M0 29.53v14.766c0-1.232 39-3.692 39-9.844V19.686c0 6.152-39 8.612-39 9.844M0 9.843V24.61c0-1.231 39-3.691 39-9.843V0C39 6.152 0 8.612 0 9.843M0 49.216v14.766c0-1.231 39-3.691 39-9.843V39.373c0 6.151-39 8.612-39 9.843">
</path>
</g>
</g>
</svg>
<span>
Scala
</span>
</a>
</div>
<button class="leafygreen-ui-ki2t97">
Show all
<svg aria-label="Chevron Down Icon" class="" fill="none" height="16" role="img" viewbox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg">
<path clip-rule="evenodd" d="M1.636 5.364a1 1 0 0 0 0 1.414l4.95 4.95.707.707a1 1 0 0 0 1.414 0l.707-.707 4.95-4.95a1 1 0 0 0 0-1.414l-.707-.707a1 1 0 0 0-1.414 0L8 8.899 3.757 4.657a1 1 0 0 0-1.414 0l-.707.707Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</button>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
db.collection.deleteOne()
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-db.collection.deleteOne" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-db.collection.deleteOne">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Removes a single document from a collection.
</p>
<table class="css-11h39yh e1nex8bq0">
<colgroup>
<col class="field-name"/>
<col class="field-body"/>
</colgroup>
<tbody>
<tr class="css-x8snli">
<th>
Returns
<!-- -->
:
</th>
<td>
A document containing:
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A boolean
<code class="leafygreen-ui-1l06pbn">
acknowledged
</code>
as
<code class="leafygreen-ui-1l06pbn">
true
</code>
if the operation ran with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-write-concern">
write concern
</a>
or
<code class="leafygreen-ui-1l06pbn">
false
</code>
if write concern was disabled
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
deletedCount
</code>
containing the number of deleted documents
</p>
</li>
</ul>
</td>
</tr>
</tbody>
</table>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can use
<code class="leafygreen-ui-1l06pbn">
db.collection.deleteOne()
</code>
for deployments hosted in the following
environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.collection.deleteOne" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
deleteOne()
</code>
</span>
</a>
method has the following form:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.collection.deleteOne(\n <filter>,\n {\n writeConcern: <document>,\n collation: <document>,\n hint: <document|string>\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">collection</span>.<span class="lg-highlight-title lg-highlight-function">deleteOne</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <<!-- -->filter<!-- -->><!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">writeConcern</span>: <<span class="lg-highlight-variable lg-highlight-language">document</span>><!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">collation</span>: <<span class="lg-highlight-variable lg-highlight-language">document</span>><!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hint</span>: <span class="lg-highlight-xml"><document|string></span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-xml"> }</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-xml">)</span></td></tr></tbody></table></code></pre>
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</svg>
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</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.collection.deleteOne" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
deleteOne()
</code>
</span>
</a>
method takes the following
parameters:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Parameter
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-deleteOne-filter" target="_self">
<span>
filter
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-deleteOne-filter">
</span>
<p class="leafygreen-ui-1kp3ins">
Specifies deletion criteria using
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/">
query operators
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
Specify an empty document
<code class="leafygreen-ui-1l06pbn">
{ }
</code>
to delete the first document returned in
the collection.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-deleteOne-wc" target="_self">
<span>
writeConcern
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-deleteOne-wc">
</span>
<p class="leafygreen-ui-1kp3ins">
Optional. A document expressing the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/">
write concern
</a>
. Omit to use the default write concern.
</p>
<p class="leafygreen-ui-1kp3ins">
Do not explicitly set the write concern for the operation if run in
a transaction. To use write concern with transactions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions-write-concern">
Transactions and Write Concern
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-deleteOne-collation" target="_self">
<span>
collation
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-deleteOne-collation">
</span>
<p class="leafygreen-ui-1kp3ins">
Optional.
</p>
<p class="leafygreen-ui-1kp3ins">
Specifies the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/collation/#std-label-collation">
collation
</a>
to use for the operation.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/collation/#std-label-collation">
Collation
</a>
allows users to specify
language-specific rules for string comparison, such as rules for
lettercase and accent marks.
</p>
<p class="leafygreen-ui-1kp3ins">
The collation option has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"collation: {\n locale: <string>,\n caseLevel: <boolean>,\n caseFirst: <string>,\n strength: <int>,\n numericOrdering: <boolean>,\n alternate: <string>,\n maxVariable: <string>,\n backwards: <boolean>\n}"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">collation: {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> locale: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> caseLevel: <boolean>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> caseFirst: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> strength: <int>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> numericOrdering: <boolean>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> alternate: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> maxVariable: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> backwards: <boolean></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
When specifying collation, the
<code class="leafygreen-ui-1l06pbn">
locale
</code>
field is mandatory; all
other collation fields are optional. For descriptions of the fields,
see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/collation/#std-label-collation-document-fields">
Collation Document
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
If the collation is unspecified but the collection has a
default collation (see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.createCollection/#mongodb-method-db.createCollection">
<code class="leafygreen-ui-1l06pbn">
db.createCollection()
</code>
</a>
), the
operation uses the collation specified for the collection.
</p>
<p class="leafygreen-ui-1kp3ins">
If no collation is specified for the collection or for the
operations, MongoDB uses the simple binary comparison used in prior
versions for string comparisons.
</p>
<p class="leafygreen-ui-1kp3ins">
You cannot specify multiple collations for an operation. For
example, you cannot specify different collations per field, or if
performing a find with a sort, you cannot use one collation for the
find and another for the sort.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-deleteOne-hint" target="_self">
<span>
hint
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-deleteOne-hint">
</span>
<p class="leafygreen-ui-1kp3ins">
Optional. A document or string that specifies the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/indexes/#std-label-indexes">
index
</a>
to use to support the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-deleteOne-filter" target="_self">
<span>
query predicate
<!-- -->
.
</span>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The option can take an index specification document or the
index name string.
</p>
<p class="leafygreen-ui-1kp3ins">
If you specify an index that does not exist, the operation
errors.
</p>
<p class="leafygreen-ui-1kp3ins">
For an example, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-ex-deleteOne-hint" target="_self">
<span>
Specify
<code class="leafygreen-ui-1l06pbn">
hint
</code>
for Delete Operations
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<span class="leafygreen-ui-1qnjd6d" id="std-label-deleteOne-deletion-order">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Deletion Order
<a class="headerlink leafygreen-ui-1kepx47" href="#deletion-order" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="deletion-order">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.collection.deleteOne" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
db.collection.deleteOne()
</code>
</span>
</a>
deletes the first document that matches
the filter. Use a field that is part of a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-unique-index">
unique index
</a>
such as
<code class="leafygreen-ui-1l06pbn">
_id
</code>
for precise deletions.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Sharded Collections
<a class="headerlink leafygreen-ui-1kepx47" href="#sharded-collections" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sharded-collections">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.collection.deleteOne" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
db.collection.deleteOne()
</code>
</span>
</a>
on a sharded collection:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If you only target one shard, you can use a partial shard key in the query specification or,
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If you set
<code class="leafygreen-ui-1l06pbn">
limit: 1
</code>
, you do not need to provide the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-shard-key">
shard key
</a>
or
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field in the query specification.
</p>
</li>
</ul>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Transactions
<a class="headerlink leafygreen-ui-1kepx47" href="#transactions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="transactions">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.collection.deleteOne" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
db.collection.deleteOne()
</code>
</span>
</a>
can be used inside
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions">
distributed transactions
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
Do not explicitly set the write concern for the operation if run in
a transaction. To use write concern with transactions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions-write-concern">
Transactions and Write Concern
<!-- -->
.
</a>
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
In most cases, a distributed transaction incurs a greater
performance cost over single document writes, and the
availability of distributed transactions should not be a
replacement for effective schema design. For many scenarios, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/data-modeling/concepts/embedding-vs-references/#std-label-data-modeling-embedding">
denormalized data model (embedded documents and arrays)
</a>
will continue to be optimal for your
data and use cases. That is, for many scenarios, modeling your data
appropriately will minimize the need for distributed
transactions.
</p>
<p class="leafygreen-ui-1kp3ins">
For additional transactions usage considerations
(such as runtime limit and oplog size limit), see also
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions-production-consideration/#std-label-production-considerations">
Production Considerations
<!-- -->
.
</a>
</p>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Oplog Entries
<a class="headerlink leafygreen-ui-1kepx47" href="#oplog-entries" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="oplog-entries">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If a
<code class="leafygreen-ui-1l06pbn">
db.collection.deleteOne()
</code>
operation successfully deletes a
document, the operation adds an entry on the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-oplog">
oplog
</a>
(operations
log). If the operation fails or does not find a document to delete, the
operation does not add an entry on the oplog.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<span class="leafygreen-ui-1qnjd6d" id="std-label-deleteOne-example-delete-single-document">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Delete a Single Document
<a class="headerlink leafygreen-ui-1kepx47" href="#delete-a-single-document" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="delete-a-single-document">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
orders
</code>
collection has documents with the following structure:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.orders.insertOne(\n {\n _id: ObjectId(\"563237a41a4d68582c2509da\"),\n stock: \"Brent Crude Futures\",\n qty: 250,\n type: \"buy-limit\",\n limit: 48.90,\n creationts: ISODate(\"2015-11-01T12:30:15Z\"),\n expiryts: ISODate(\"2015-11-01T12:35:15Z\"),\n client: \"Crude Traders Inc.\"\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">orders</span>.<span class="lg-highlight-title lg-highlight-function">insertOne</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"563237a41a4d68582c2509da"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">stock</span>: <span class="lg-highlight-string">"Brent Crude Futures"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">250</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"buy-limit"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">limit</span>: <span class="lg-highlight-number">48.90</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">creationts</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2015-11-01T12:30:15Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">expiryts</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2015-11-01T12:35:15Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">client</span>: <span class="lg-highlight-string">"Crude Traders Inc."</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following operation deletes the order with
<code class="leafygreen-ui-1l06pbn">
_id:
ObjectId("563237a41a4d68582c2509da")
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"try {\n db.orders.deleteOne( { _id: ObjectId(\"563237a41a4d68582c2509da\") } );\n} catch (e) {\n print(e);\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">try</span> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->db.<span class="lg-highlight-property">orders</span>.<span class="lg-highlight-title lg-highlight-function">deleteOne</span>( <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"563237a41a4d68582c2509da"</span>) } )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} <span class="lg-highlight-keyword">catch</span> <!-- -->(<!-- -->e) <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-function">print</span>(<!-- -->e)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ acknowledged: true, deletedCount: 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">acknowledged</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">deletedCount</span>: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following operation deletes the first document with
<code class="leafygreen-ui-1l06pbn">
expiryts
</code>
greater
than
<code class="leafygreen-ui-1l06pbn">
ISODate("2015-11-01T12:40:15Z")
</code>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"try {\n db.orders.deleteOne( { expiryts: { $lt: ISODate(\"2015-11-01T12:40:15Z\") } } );\n} catch (e) {\n print(e);\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">try</span> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->db.<span class="lg-highlight-property">orders</span>.<span class="lg-highlight-title lg-highlight-function">deleteOne</span>( <!-- -->{ <span class="lg-highlight-attr">expiryts</span>: <!-- -->{ <span class="lg-highlight-attr">$lt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2015-11-01T12:40:15Z"</span>) } } )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} <span class="lg-highlight-keyword">catch</span> <!-- -->(<!-- -->e) <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-function">print</span>(<!-- -->e)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ acknowledged: true, deletedCount: 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">acknowledged</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">deletedCount</span>: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
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</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-deleteOne-example-update-with-write-concern">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
deleteOne() with Write Concern
<a class="headerlink leafygreen-ui-1kepx47" href="#deleteone---with-write-concern" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="deleteone---with-write-concern">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Given a three member replica set, the following operation specifies a
<code class="leafygreen-ui-1l06pbn">
w
</code>
of
<code class="leafygreen-ui-1l06pbn">
majority
</code>
,
<code class="leafygreen-ui-1l06pbn">
wtimeout
</code>
of
<code class="leafygreen-ui-1l06pbn">
100
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"try {\n db.orders.deleteOne(\n { _id: ObjectId(\"563237a41a4d68582c2509da\") },\n { w: \"majority\", wtimeout: 100 }\n );\n} catch (e) {\n print (e);\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">try</span> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->db.<span class="lg-highlight-property">orders</span>.<span class="lg-highlight-title lg-highlight-function">deleteOne</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"563237a41a4d68582c2509da"</span>) }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-string">"majority"</span>, <span class="lg-highlight-attr">wtimeout</span>: <span class="lg-highlight-number">100</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} <span class="lg-highlight-keyword">catch</span> <!-- -->(<!-- -->e) <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->print <!-- -->(<!-- -->e)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
If the acknowledgment takes longer than the
<code class="leafygreen-ui-1l06pbn">
wtimeout
</code>
limit, the following
exception is thrown:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"WriteConcernError({\n code: 64,\n errmsg: \"waiting for replication timed out\",\n errInfo: {\n wtimeout: true,\n writeConcern: {\n w: \"majority\",\n wtimeout: 100,\n provenance: \"getLastErrorDefaults\"\n }\n }\n})","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">WriteConcernError</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">code</span>: <span class="lg-highlight-number">64</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">errmsg</span>: <span class="lg-highlight-string">"waiting for replication timed out"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">errInfo</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">wtimeout</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">writeConcern</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-string">"majority"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">wtimeout</span>: <span class="lg-highlight-number">100</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">provenance</span>: <span class="lg-highlight-string">"getLastErrorDefaults"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">})</td></tr></tbody></table></code></pre>
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</div>
</div>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/WriteResult/#mongodb-data-WriteResult.writeConcernError">
<code class="leafygreen-ui-1l06pbn">
WriteResult.writeConcernError
</code>
</a>
</p>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Specify Collation
<a class="headerlink leafygreen-ui-1kepx47" href="#specify-collation" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="specify-collation">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/collation/#std-label-collation">
Collation
</a>
allows users to specify
language-specific rules for string comparison, such as rules for
lettercase and accent marks.
</p>
<p class="leafygreen-ui-1kp3ins">
A collection
<code class="leafygreen-ui-1l06pbn">
restaurants
</code>
has the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.restaurants.insertMany( [\n { _id: 1, category: \"café\", status: \"A\" },\n { _id: 2, category: \"cafe\", status: \"a\" },\n { _id: 3, category: \"cafE\", status: \"a\" }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">restaurants</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">category</span>: <span class="lg-highlight-string">"café"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">category</span>: <span class="lg-highlight-string">"cafe"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"a"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">category</span>: <span class="lg-highlight-string">"cafE"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"a"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following operation includes the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/collation/#std-label-collation">
collation
</a>
option:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.restaurants.deleteOne(\n { category: \"cafe\", status: \"A\" },\n { collation: { locale: \"fr\", strength: 1 } }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">restaurants</span>.<span class="lg-highlight-title lg-highlight-function">deleteOne</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">category</span>: <span class="lg-highlight-string">"cafe"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">collation</span>: <!-- -->{ <span class="lg-highlight-attr">locale</span>: <span class="lg-highlight-string">"fr"</span>, <span class="lg-highlight-attr">strength</span>: <span class="lg-highlight-number">1</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-ex-deleteOne-hint">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Specify
<code class="leafygreen-ui-1l06pbn">
hint
</code>
for Delete Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#specify-hint-for-delete-operations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="specify-hint-for-delete-operations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
In
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
, create a
<code class="leafygreen-ui-1l06pbn">
students
</code>
collection
with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.members.insertMany( [\n { _id: 1, student: \"Richard\", grade: \"F\", points: 0 },\n { _id: 2, student: \"Jane\", grade: \"A\", points: 60 },\n { _id: 3, student: \"Adam\", grade: \"F\", points: 0 },\n { _id: 4, student: \"Ronan\", grade: \"D\", points: 20 },\n { _id: 5, student: \"Noah\", grade: \"F\", points: 0 },\n { _id: 6, student: \"Henry\", grade: \"A\", points: 86 }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">members</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">student</span>: <span class="lg-highlight-string">"Richard"</span>, <span class="lg-highlight-attr">grade</span>: <span class="lg-highlight-string">"F"</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">0</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">student</span>: <span class="lg-highlight-string">"Jane"</span>, <span class="lg-highlight-attr">grade</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">60</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">student</span>: <span class="lg-highlight-string">"Adam"</span>, <span class="lg-highlight-attr">grade</span>: <span class="lg-highlight-string">"F"</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">0</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-attr">student</span>: <span class="lg-highlight-string">"Ronan"</span>, <span class="lg-highlight-attr">grade</span>: <span class="lg-highlight-string">"D"</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">20</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-attr">student</span>: <span class="lg-highlight-string">"Noah"</span>, <span class="lg-highlight-attr">grade</span>: <span class="lg-highlight-string">"F"</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">0</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-attr">student</span>: <span class="lg-highlight-string">"Henry"</span>, <span class="lg-highlight-attr">grade</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">86</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Create the following index on the collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.members.createIndex( { grade: 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">members</span>.<span class="lg-highlight-title lg-highlight-function">createIndex</span>( <!-- -->{ <span class="lg-highlight-attr">grade</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following delete operation explicitly hints to use the index
<code class="leafygreen-ui-1l06pbn">
{ grade: 1 }
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.members.deleteOne(\n { points: { $lte: 20 }, grade: \"F\" },\n { hint: { grade: 1 } }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">members</span>.<span class="lg-highlight-title lg-highlight-function">deleteOne</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">points</span>: <!-- -->{ <span class="lg-highlight-attr">$lte</span>: <span class="lg-highlight-number">20</span> }<!-- -->, <span class="lg-highlight-attr">grade</span>: <span class="lg-highlight-string">"F"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">hint</span>: <!-- -->{ <span class="lg-highlight-attr">grade</span>: <span class="lg-highlight-number">1</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If you specify an index that does not exist, the operation errors.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The delete command returns the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ acknowledged: true, deletedCount: 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">acknowledged</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">deletedCount</span>: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To view the indexes used, you can use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/indexStats/#mongodb-pipeline-pipe.-indexStats">
<code class="leafygreen-ui-1l06pbn">
$indexStats
</code>
</a>
pipeline:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.members.aggregate( [ { $indexStats: { } }, { $sort: { name: 1 } } ] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">members</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">$indexStats</span>: <!-- -->{ <!-- -->} }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">$sort</span>: <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-number">1</span> } } ] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
accesses.ops
</code>
field in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/indexStats/#mongodb-pipeline-pipe.-indexStats">
<code class="leafygreen-ui-1l06pbn">
$indexStats
</code>
</a>
output
indicates the number of operations that used the index.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
To delete multiple documents, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.deleteMany/#mongodb-method-db.collection.deleteMany">
<code class="leafygreen-ui-1l06pbn">
db.collection.deleteMany()
</code>
</a>
</p>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/change-events/dropIndexes/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
dropIndexes
<a class="headerlink leafygreen-ui-1kepx47" href="#dropindexes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="dropindexes">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#synopsis" target="_self">
<span>
Synopsis
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#descriptions" target="_self">
<span>
Descriptions
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Synopsis
<a class="headerlink leafygreen-ui-1kepx47" href="#synopsis" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="synopsis">
</div>
</a>
</h2>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
dropIndexes
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-dropIndexes" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-dropIndexes">
</div>
</a>
</dt>
<dd>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
A
<code class="leafygreen-ui-1l06pbn">
dropIndexes
</code>
event occurs when an index is dropped from the collection and
the change stream has the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/change-events/#std-label-change-streams-expanded-events">
showExpandedEvents
</a>
option set to
<code class="leafygreen-ui-1l06pbn">
true
</code>
.
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Descriptions
<a class="headerlink leafygreen-ui-1kepx47" href="#descriptions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="descriptions">
</div>
</a>
</h2>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:60%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
_id
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--id">
</span>
<p class="leafygreen-ui-1kp3ins">
A
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-BSON">
BSON
</a>
object which serves as an identifier for the
change stream event. This value is used as the
<code class="leafygreen-ui-1l06pbn">
resumeToken
</code>
for the
<code class="leafygreen-ui-1l06pbn">
resumeAfter
</code>
parameter when resuming a change stream.
The
<code class="leafygreen-ui-1l06pbn">
_id
</code>
object has the following form:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_data\" : <bindata|hex>\n}"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> "_data" : <BinData|hex string></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
_data
</code>
type depends on the MongoDB versions
and, in some cases, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/setFeatureCompatibilityVersion/#std-label-view-fcv">
feature compatibility version (fCV)
</a>
at the time of the change stream's
opening or resumption. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/changeStreams/#std-label-change-stream-resume-token">
Resume Tokens
</a>
for the
full list of
<code class="leafygreen-ui-1l06pbn">
_data
</code>
types.
</p>
<p class="leafygreen-ui-1kp3ins">
For an example of resuming a change stream by
<code class="leafygreen-ui-1l06pbn">
resumeToken
</code>
, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/changeStreams/#std-label-change-stream-resume">
Resume a Change Stream
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
clusterTime
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Timestamp
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--clusterTime">
</span>
<p class="leafygreen-ui-1kp3ins">
The timestamp from the oplog entry associated with the event.
</p>
<p class="leafygreen-ui-1kp3ins">
Change stream event notifications associated with a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions">
multi-document transaction
</a>
all have the same
<code class="leafygreen-ui-1l06pbn">
clusterTime
</code>
value: the time when the transaction
was committed.
</p>
<p class="leafygreen-ui-1kp3ins">
Events with the same
<code class="leafygreen-ui-1l06pbn">
clusterTime
</code>
may not all relate to the same transaction.
Some events don't relate to a transaction at all. Starting in MongoDB 8.0,
this may be true for events on any deployment. In previous versions, this
behavior was possible only for events on a sharded cluster.
</p>
<p class="leafygreen-ui-1kp3ins">
To identify events for a single transaction, you can use the
combination of
<code class="leafygreen-ui-1l06pbn">
lsid
</code>
and
<code class="leafygreen-ui-1l06pbn">
txnNumber
</code>
in the change stream
event document.
</p>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
8.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
collectionUUID
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
UUID
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--collectionUUID">
</span>
<p class="leafygreen-ui-1kp3ins">
<span class="leafygreen-ui-vm4wms" tabindex="0">
UUID
</span>
identifying the collection
where the change occurred.
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
lsid
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--lsid">
</span>
<p class="leafygreen-ui-1kp3ins">
The identifier for the session associated with the transaction.
</p>
<p class="leafygreen-ui-1kp3ins">
Only present if the operation is part of a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/">
multi-document
transaction
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ns
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--ns">
</span>
<p class="leafygreen-ui-1kp3ins">
The namespace (database and or collection) affected by the event.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ns.db
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--ns.db">
</span>
<p class="leafygreen-ui-1kp3ins">
The name of the database where the event occurred.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ns.coll
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--ns.coll">
</span>
<p class="leafygreen-ui-1kp3ins">
The name of the collection where the event occurred.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
operationDescription
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--operationDescription">
</span>
<p class="leafygreen-ui-1kp3ins">
Additional information on the change operation.
</p>
<p class="leafygreen-ui-1kp3ins">
This document and its subfields only appears when the change stream uses
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/change-events/#std-label-change-streams-expanded-events">
expanded events
<!-- -->
.
</a>
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<code class="leafygreen-ui-1l06pbn">
operationDescription.
</code>
</div>
<div class="line">
<code class="leafygreen-ui-1l06pbn">
indexes
</code>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
An array of documents listing the indexes that were dropped
by the operation.
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
operationType
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--operationType">
</span>
<p class="leafygreen-ui-1kp3ins">
The type of operation that the change notification reports.
</p>
<p class="leafygreen-ui-1kp3ins">
Returns a value of
<code class="leafygreen-ui-1l06pbn">
dropIndexes
</code>
for these change events.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
txnNumber
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
NumberLong
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--txnNumber">
</span>
<p class="leafygreen-ui-1kp3ins">
Together with the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label--idref--lsid" target="_self">
<span>
lsid
</span>
</a>
, a number that helps uniquely
identify a transction.
</p>
<p class="leafygreen-ui-1kp3ins">
Only present if the operation is part of a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/">
multi-document
transaction
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
wallTime
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-ISODate">
ISODate
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--wallTime">
</span>
<p class="leafygreen-ui-1kp3ins">
The server date and time of the database operation.
<code class="leafygreen-ui-1l06pbn">
wallTime
</code>
differs from
<code class="leafygreen-ui-1l06pbn">
clusterTime
</code>
in that
<code class="leafygreen-ui-1l06pbn">
clusterTime
</code>
is a timestamp
taken from the oplog entry associated with the database operation
event.
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following example shows a
<code class="leafygreen-ui-1l06pbn">
dropIndexes
</code>
event:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\": { <resumetoken> },\n \"operationType\": \"dropIndexes\",\n \"clusterTime\": <timestamp>\n \"collectionUUID\": <uuid>,\n \"wallTime\": <isodate>,\n \"ns\": {\n \"db\": \"test\",\n \"coll\": \"authors\" },\n \"operationDescription\": {\n \"indexes\": [\n { \"v\": 2, \"key\": { \"name\": 1 }, \"name\": \"name_1\" }\n ]\n }\n}","programmingLanguage":"JSON"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light json leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"_id"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span> <ResumeToken> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"operationType"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"dropIndexes"</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"clusterTime"</span><span class="lg-highlight-punctuation">:</span> <Timestamp></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"collectionUUID"</span><span class="lg-highlight-punctuation">:</span> <uuid><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"wallTime"</span><span class="lg-highlight-punctuation">:</span> <isodate><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"ns"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"db"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"test"</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"coll"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"authors"</span> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"operationDescription"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"indexes"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">[</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">{</span> <span class="lg-highlight-attr">"v"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-number">2</span><span class="lg-highlight-punctuation">,</span> <span class="lg-highlight-attr">"key"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span> <span class="lg-highlight-attr">"name"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-number">1</span> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span> <span class="lg-highlight-attr">"name"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"name_1"</span> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">]</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-punctuation">}</span></td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/indexes/index-types/index-wildcard/create-wildcard-index-single-field/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Create a Wildcard Index on a Single Field
<a class="headerlink leafygreen-ui-1kepx47" href="#create-a-wildcard-index-on-a-single-field" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="create-a-wildcard-index-on-a-single-field">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#about-this-task" target="_self">
<span>
About this Task
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#before-you-begin" target="_self">
<span>
Before You Begin
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#procedure" target="_self">
<span>
Procedure
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#results" target="_self">
<span>
Results
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#learn-more" target="_self">
<span>
Learn More
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
Wildcard indexes on a single field support queries on any subfield of
the indexed field. Use wildcard indexes to support queries on field
names that you don't know in advance or vary between documents.
</p>
<p class="leafygreen-ui-1kp3ins">
To create a wildcard index on a single field, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.createIndex/#mongodb-method-db.collection.createIndex">
<code class="leafygreen-ui-1l06pbn">
db.collection.createIndex()
</code>
</a>
method and include the wildcard
specifier (
<code class="leafygreen-ui-1l06pbn">
$**
</code>
) in the index key:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.collection.createIndex( { \"<field>.$**\": <sortorder> } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">collection</span>.<span class="lg-highlight-title lg-highlight-function">createIndex</span>( <!-- -->{ <span class="lg-highlight-string">"<field>.$**"</span>: <<!-- -->sortOrder<!-- -->> <!-- -->} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
About this Task
<a class="headerlink leafygreen-ui-1kepx47" href="#about-this-task" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="about-this-task">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Only use wildcard indexes when the fields you want to index are unknown
or may change. Wildcard indexes don't perform as well as targeted
indexes on specific fields. If your collection contains arbitrary field
names that prevent targeted indexes, consider remodeling your schema to
have consistent field names. To learn more about targeted indexes, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/data-modeling/schema-design-process/create-indexes/#std-label-create-indexes-to-support-queries">
Create Indexes to Support Your Queries
<!-- -->
.
</a>
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Before You Begin
<a class="headerlink leafygreen-ui-1kepx47" href="#before-you-begin" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="before-you-begin">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Create a
<code class="leafygreen-ui-1l06pbn">
products
</code>
collection that contains the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.products.insertMany( [\n {\n \"product_name\" : \"Spy Coat\",\n \"attributes\" : {\n \"material\" : [ \"Tweed\", \"Wool\", \"Leather\" ],\n \"size\" : {\n \"length\" : 72,\n \"units\" : \"inches\"\n }\n }\n },\n {\n \"product_name\" : \"Spy Pen\",\n \"attributes\" : {\n \"colors\" : [ \"Blue\", \"Black\" ],\n \"secret_feature\" : {\n \"name\" : \"laser\",\n \"power\" : \"1000\",\n \"units\" : \"watts\",\n }\n }\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">products</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"product_name"</span> <!-- -->: <span class="lg-highlight-string">"Spy Coat"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"attributes"</span> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"material"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"Tweed"</span>, <span class="lg-highlight-string">"Wool"</span>, <span class="lg-highlight-string">"Leather"</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"length"</span> <!-- -->: <span class="lg-highlight-number">72</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"units"</span> <!-- -->: <span class="lg-highlight-string">"inches"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"product_name"</span> <!-- -->: <span class="lg-highlight-string">"Spy Pen"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"attributes"</span> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"colors"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"Blue"</span>, <span class="lg-highlight-string">"Black"</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"secret_feature"</span> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"name"</span> <!-- -->: <span class="lg-highlight-string">"laser"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"power"</span> <!-- -->: <span class="lg-highlight-string">"1000"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"units"</span> <!-- -->: <span class="lg-highlight-string">"watts"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Procedure
<a class="headerlink leafygreen-ui-1kepx47" href="#procedure" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="procedure">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following operation creates a wildcard index on the
<code class="leafygreen-ui-1l06pbn">
attributes
</code>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.products.createIndex( { \"attributes.$**\" : 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">products</span>.<span class="lg-highlight-title lg-highlight-function">createIndex</span>( <!-- -->{ <span class="lg-highlight-string">"attributes.$**"</span> <!-- -->: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Results
<a class="headerlink leafygreen-ui-1kepx47" href="#results" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="results">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The wildcard index supports single-field queries on
<code class="leafygreen-ui-1l06pbn">
attributes
</code>
or
its embedded fields. For example, the index supports the following
queries:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Query:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.products.find( { \"attributes.size.length\" : { $gt : 60 } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">products</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-string">"attributes.size.length"</span> <!-- -->: <!-- -->{ <!-- -->$gt<!-- --> <!-- -->: <span class="lg-highlight-number">60</span> } } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n _id: ObjectId(\"63472196b1fac2ee2e957ef6\"),\n product_name: 'Spy Coat',\n attributes: {\n material: [ 'Tweed', 'Wool', 'Leather' ],\n size: { length: 72, units: 'inches' }\n }\n }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"63472196b1fac2ee2e957ef6"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">product_name</span>: <span class="lg-highlight-string">'Spy Coat'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">attributes</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">material</span>: <!-- -->[ <span class="lg-highlight-string">'Tweed'</span>, <span class="lg-highlight-string">'Wool'</span>, <span class="lg-highlight-string">'Leather'</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">length</span>: <span class="lg-highlight-number">72</span>, <span class="lg-highlight-attr">units</span>: <span class="lg-highlight-string">'inches'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Query:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.products.find( { \"attributes.material\" : \"Leather\" } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">products</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-string">"attributes.material"</span> <!-- -->: <span class="lg-highlight-string">"Leather"</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n _id: ObjectId(\"63472196b1fac2ee2e957ef6\"),\n product_name: 'Spy Coat',\n attributes: {\n material: [ 'Tweed', 'Wool', 'Leather' ],\n size: { length: 72, units: 'inches' }\n }\n }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"63472196b1fac2ee2e957ef6"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">product_name</span>: <span class="lg-highlight-string">'Spy Coat'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">attributes</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">material</span>: <!-- -->[ <span class="lg-highlight-string">'Tweed'</span>, <span class="lg-highlight-string">'Wool'</span>, <span class="lg-highlight-string">'Leather'</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">length</span>: <span class="lg-highlight-number">72</span>, <span class="lg-highlight-attr">units</span>: <span class="lg-highlight-string">'inches'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Query:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.products.find(\n { \"attributes.secret_feature.name\" : \"laser\" },\n { \"_id\": 0, \"product_name\": 1, \"attributes.colors\": 1 }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">products</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"attributes.secret_feature.name"</span> <!-- -->: <span class="lg-highlight-string">"laser"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span>: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"product_name"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"attributes.colors"</span>: <span class="lg-highlight-number">1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n product_name: 'Spy Pen',\n attributes: { colors: [ 'Blue', 'Black' ] }\n }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">product_name</span>: <span class="lg-highlight-string">'Spy Pen'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">attributes</span>: <!-- -->{ <span class="lg-highlight-attr">colors</span>: <!-- -->[ <span class="lg-highlight-string">'Blue'</span>, <span class="lg-highlight-string">'Black'</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Wildcard indexes have specific behavior when the indexed field contains
an embedded object (for example,
<code class="leafygreen-ui-1l06pbn">
attributes.secret_feature
</code>
). For
more information, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-wildcard/reference/embedded-object-behavior/#std-label-wildcard-index-embedded-object-behavior">
Wildcard Indexes on Embedded Objects and Arrays
<!-- -->
.
</a>
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Learn More
<a class="headerlink leafygreen-ui-1kepx47" href="#learn-more" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="learn-more">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To learn more about behaviors and use cases for wildcard indexes, see:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-wildcard/create-wildcard-index-all-fields/#std-label-create-wildcard-index-all-fields">
Create a Wildcard Index on All Fields
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-wildcard/create-wildcard-index-multiple-fields/#std-label-create-wildcard-index-multiple-fields">
Include or Exclude Fields in a Wildcard Index
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-wildcard/index-wildcard-compound/#std-label-wildcard-index-compound">
Compound Wildcard Indexes
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-wildcard/reference/restrictions/#std-label-wildcard-index-restrictions">
Wildcard Index Restrictions
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/tutorial/measure-index-use/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Measure Index Use
<a class="headerlink leafygreen-ui-1kepx47" href="#measure-index-use" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="measure-index-use">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#get-index-access-information-with--indexstats" target="_self">
<span>
Get Index Access Information with
<code class="css-1kekw28 e1wawog0">
$indexStats
</code>
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#return-query-plan-with-explain--" target="_self">
<span>
Return Query Plan with
<code class="css-1kekw28 e1wawog0">
explain()
</code>
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#control-index-use-with-hint--" target="_self">
<span>
Control Index Use with
<code class="css-1kekw28 e1wawog0">
hint()
</code>
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#index-metrics" target="_self">
<span>
Index Metrics
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Get Index Access Information with
<code class="leafygreen-ui-1l06pbn">
$indexStats
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#get-index-access-information-with--indexstats" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="get-index-access-information-with--indexstats">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/indexStats/#mongodb-pipeline-pipe.-indexStats">
<code class="leafygreen-ui-1l06pbn">
$indexStats
</code>
</a>
aggregation stage to get statistics
regarding the use of each index for a collection. For example, the
following aggregation operation returns statistics on the index use on
the
<code class="leafygreen-ui-1l06pbn">
orders
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.orders.aggregate( [ { $indexStats: { } } ] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">orders</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">$indexStats</span>: <!-- -->{ <!-- -->} } ] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/indexStats/#mongodb-pipeline-pipe.-indexStats">
<code class="leafygreen-ui-1l06pbn">
$indexStats
</code>
</a>
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Return Query Plan with
<code class="leafygreen-ui-1l06pbn">
explain()
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#return-query-plan-with-explain--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="return-query-plan-with-explain--">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.explain/#mongodb-method-db.collection.explain">
<code class="leafygreen-ui-1l06pbn">
db.collection.explain()
</code>
</a>
or the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.explain/#mongodb-method-cursor.explain">
<code class="leafygreen-ui-1l06pbn">
cursor.explain()
</code>
</a>
method in
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.explain/#std-label-explain-method-executionStats">
executionStats
</a>
mode to return statistics about the
query process, including the index used, the number of documents
scanned, and the time the query takes to process in milliseconds.
</p>
<p class="leafygreen-ui-1kp3ins">
Run
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.explain/#mongodb-method-db.collection.explain">
<code class="leafygreen-ui-1l06pbn">
db.collection.explain()
</code>
</a>
or the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.explain/#mongodb-method-cursor.explain">
<code class="leafygreen-ui-1l06pbn">
cursor.explain()
</code>
</a>
method in
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.explain/#std-label-explain-method-allPlansExecution">
allPlansExecution
</a>
mode to view partial execution statistics collected during plan
selection.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-plans/#std-label-plan-cache-key">
planCacheKey
</a>
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Control Index Use with
<code class="leafygreen-ui-1l06pbn">
hint()
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#control-index-use-with-hint--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="control-index-use-with-hint--">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To
<em>
force
</em>
MongoDB to use a particular index for a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
db.collection.find()
</code>
</a>
operation, specify the index with the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.hint/#mongodb-method-cursor.hint">
<code class="leafygreen-ui-1l06pbn">
hint()
</code>
</a>
method. Append the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.hint/#mongodb-method-cursor.hint">
<code class="leafygreen-ui-1l06pbn">
hint()
</code>
</a>
method to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
find()
</code>
</a>
method. Consider the
following example:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.people.find(\n { name: \"John Doe\", zipcode: { $gt: \"63000\" } }\n).hint( { zipcode: 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">people</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"John Doe"</span>, <span class="lg-highlight-attr">zipcode</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-string">"63000"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">).<span class="lg-highlight-title lg-highlight-function">hint</span>( <!-- -->{ <span class="lg-highlight-attr">zipcode</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To view the execution statistics for a specific index, append to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
db.collection.find()
</code>
</a>
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.hint/#mongodb-method-cursor.hint">
<code class="leafygreen-ui-1l06pbn">
hint()
</code>
</a>
method
followed by
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.explain/#mongodb-method-cursor.explain">
<code class="leafygreen-ui-1l06pbn">
cursor.explain()
</code>
</a>
, e.g.:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.people.find(\n { name: \"John Doe\", zipcode: { $gt: \"63000\" } }\n).hint( { zipcode: 1 } ).explain(\"executionStats\")","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">people</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"John Doe"</span>, <span class="lg-highlight-attr">zipcode</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-string">"63000"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">).<span class="lg-highlight-title lg-highlight-function">hint</span>( <!-- -->{ <span class="lg-highlight-attr">zipcode</span>: <span class="lg-highlight-number">1</span> } ).<span class="lg-highlight-title lg-highlight-function">explain</span>(<span class="lg-highlight-string">"executionStats"</span>)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Or, append
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.hint/#mongodb-method-cursor.hint">
<code class="leafygreen-ui-1l06pbn">
hint()
</code>
</a>
method to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.explain/#mongodb-method-db.collection.explain">
<code class="leafygreen-ui-1l06pbn">
db.collection.explain().find()
</code>
:
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.people.explain(\"executionStats\").find(\n { name: \"John Doe\", zipcode: { $gt: \"63000\" } }\n).hint( { zipcode: 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">people</span>.<span class="lg-highlight-title lg-highlight-function">explain</span>(<span class="lg-highlight-string">"executionStats"</span>).<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"John Doe"</span>, <span class="lg-highlight-attr">zipcode</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-string">"63000"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">).<span class="lg-highlight-title lg-highlight-function">hint</span>( <!-- -->{ <span class="lg-highlight-attr">zipcode</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Specify the
<code class="leafygreen-ui-1l06pbn">
$natural
</code>
operator to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.hint/#mongodb-method-cursor.hint">
<code class="leafygreen-ui-1l06pbn">
hint()
</code>
</a>
method to prevent MongoDB from using
<em>
any
</em>
index:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.people.find(\n { name: \"John Doe\", zipcode: { $gt: \"63000\" } }\n).hint( { $natural: 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">people</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"John Doe"</span>, <span class="lg-highlight-attr">zipcode</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-string">"63000"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">).<span class="lg-highlight-title lg-highlight-function">hint</span>( <!-- -->{ <span class="lg-highlight-attr">$natural</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Index Metrics
<a class="headerlink leafygreen-ui-1kepx47" href="#index-metrics" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="index-metrics">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
In addition to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/indexStats/#mongodb-pipeline-pipe.-indexStats">
<code class="leafygreen-ui-1l06pbn">
$indexStats
</code>
</a>
aggregation stage, MongoDB
provides various index statistics that you may want to consider when
analyzing index use for your database:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
In the output of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/serverStatus/#mongodb-dbcommand-dbcmd.serverStatus">
<code class="leafygreen-ui-1l06pbn">
serverStatus
</code>
:
</a>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/serverStatus/#mongodb-serverstatus-serverstatus.metrics.queryExecutor.scanned">
<code class="leafygreen-ui-1l06pbn">
metrics.queryExecutor.scanned
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/serverStatus/#mongodb-serverstatus-serverstatus.metrics.operation.scanAndOrder">
<code class="leafygreen-ui-1l06pbn">
metrics.operation.scanAndOrder
</code>
</a>
</p>
</li>
</ul>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
In the output of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collStats/#mongodb-dbcommand-dbcmd.collStats">
<code class="leafygreen-ui-1l06pbn">
collStats
</code>
:
</a>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collStats/#mongodb-data-collStats.totalIndexSize">
<code class="leafygreen-ui-1l06pbn">
totalIndexSize
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collStats/#mongodb-data-collStats.indexSizes">
<code class="leafygreen-ui-1l06pbn">
indexSizes
</code>
</a>
</p>
</li>
</ul>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
In the output of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/dbStats/#mongodb-dbcommand-dbcmd.dbStats">
<code class="leafygreen-ui-1l06pbn">
dbStats
</code>
:
</a>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/dbStats/#mongodb-data-dbStats.indexes">
<code class="leafygreen-ui-1l06pbn">
dbStats.indexes
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/dbStats/#mongodb-data-dbStats.indexSize">
<code class="leafygreen-ui-1l06pbn">
dbStats.indexSize
</code>
</a>
</p>
</li>
</ul>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/indexes/index-types/geospatial/2d/query/proximity-flat-surface/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Query for Locations Near a Point on a Flat Surface
<a class="headerlink leafygreen-ui-1kepx47" href="#query-for-locations-near-a-point-on-a-flat-surface" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="query-for-locations-near-a-point-on-a-flat-surface">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#about-this-task" target="_self">
<span>
About this Task
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#before-you-begin" target="_self">
<span>
Before you Begin
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#procedure" target="_self">
<span>
Procedure
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#learn-more" target="_self">
<span>
Learn More
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
You can query for location data that appears near a specified point on a
flat surface.
</p>
<p class="leafygreen-ui-1kp3ins">
To query for location data near a specified point, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/near/#mongodb-query-op.-near">
<code class="leafygreen-ui-1l06pbn">
$near
</code>
</a>
operator:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.<collection>.find( {\n <location> : {\n $near : [ <longitude>, <latitude> ],\n $maxDistance : <distance>\n }\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<!-- --><<!-- -->collection<!-- -->><!-- -->.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- --><location field> : {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $near : [ <longitude>, <latitude> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $maxDistance : <distance in meters></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
About this Task
<a class="headerlink leafygreen-ui-1kepx47" href="#about-this-task" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="about-this-task">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
When specifying coordinate pairs in the
<code class="leafygreen-ui-1l06pbn">
$near
</code>
operator, list the
<strong>
longitude
</strong>
first, and then
<strong>
latitude
</strong>
.
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Valid longitude values are between
<code class="leafygreen-ui-1l06pbn">
-180
</code>
and
<code class="leafygreen-ui-1l06pbn">
180
</code>
, both
inclusive.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Valid latitude values are between
<code class="leafygreen-ui-1l06pbn">
-90
</code>
and
<code class="leafygreen-ui-1l06pbn">
90
</code>
, both
inclusive.
</p>
</li>
</ul>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Specify distance in the
<code class="leafygreen-ui-1l06pbn">
$maxDistance
</code>
field in
<strong>
meters
</strong>
.
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Before you Begin
<a class="headerlink leafygreen-ui-1kepx47" href="#before-you-begin" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="before-you-begin">
</div>
</a>
</h2>
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Create the
<code class="leafygreen-ui-1l06pbn">
contacts
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.contacts.insertMany( [\n {\n name: \"Evander Otylia\",\n phone: \"202-555-0193\",\n address: [ 55.5, 42.3 ]\n },\n {\n name: \"Georgine Lestaw\",\n phone: \"714-555-0107\",\n address: [ -74, 44.74 ]\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">contacts</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"Evander Otylia"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">phone</span>: <span class="lg-highlight-string">"202-555-0193"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">address</span>: <!-- -->[ <span class="lg-highlight-number">55.5</span>, <span class="lg-highlight-number">42.3</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"Georgine Lestaw"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">phone</span>: <span class="lg-highlight-string">"714-555-0107"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">address</span>: <!-- -->[ <!-- -->-<span class="lg-highlight-number">74</span>, <span class="lg-highlight-number">44.74</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
address
</code>
field contains
<a class="leafygreen-ui-tqgtui" href="/docs/manual/geospatial-queries/#std-label-geospatial-legacy">
legacy coordinate pairs
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
To query for location data with the
<code class="leafygreen-ui-1l06pbn">
$near
</code>
operator, you must create
a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-geospatial/#std-label-geospatial-index">
geospatial index
</a>
on the field that contains
the location data.
</p>
<p class="leafygreen-ui-1kp3ins">
Create a 2d index on the
<code class="leafygreen-ui-1l06pbn">
address
</code>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.contacts.createIndex( { address: \"2d\" } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">contacts</span>.<span class="lg-highlight-title lg-highlight-function">createIndex</span>( <!-- -->{ <span class="lg-highlight-attr">address</span>: <span class="lg-highlight-string">"2d"</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
</ol>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Procedure
<a class="headerlink leafygreen-ui-1kepx47" href="#procedure" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="procedure">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Use
<code class="leafygreen-ui-1l06pbn">
$near
</code>
to query the collection. The following
<code class="leafygreen-ui-1l06pbn">
$near
</code>
query
returns documents that have an
<code class="leafygreen-ui-1l06pbn">
address
</code>
field within 50 meters of the
coordinate pair
<code class="leafygreen-ui-1l06pbn">
[ -73.92, 40.78 ]
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.contacts.find( {\n address: {\n $near: [ -73.92, 40.78 ],\n $maxDistance : 50\n }\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">contacts</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">address</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$near</span>: <!-- -->[ <!-- -->-<span class="lg-highlight-number">73.92</span>, <span class="lg-highlight-number">40.78</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->$maxDistance<!-- --> <!-- -->: <span class="lg-highlight-number">50</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n _id: ObjectId(\"640a3dd9c639b6f094b00e89\"),\n name: 'Georgine Lestaw',\n phone: '714-555-0107',\n address: [ -74, 44.74 ]\n }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"640a3dd9c639b6f094b00e89"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'Georgine Lestaw'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">phone</span>: <span class="lg-highlight-string">'714-555-0107'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">address</span>: <!-- -->[ <!-- -->-<span class="lg-highlight-number">74</span>, <span class="lg-highlight-number">44.74</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Results are sorted by distance from the queried point, from nearest to
farthest.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Learn More
<a class="headerlink leafygreen-ui-1kepx47" href="#learn-more" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="learn-more">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/near/#mongodb-query-op.-near">
<code class="leafygreen-ui-1l06pbn">
$near
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/geoNear/#mongodb-pipeline-pipe.-geoNear">
<code class="leafygreen-ui-1l06pbn">
$geoNear
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/restrictions/#std-label-geospatial-restrictions">
Geospatial Index Restrictions
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
To perform proximity queries on a spherical surface, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2dsphere/query/proximity-to-geojson/#std-label-2dsphere-query-geojson-proximity">
Query for Locations Near a Point on a Sphere
<!-- -->
.
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/tutorial/project-fields-from-query-results/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Project Fields to Return from Query
<a class="headerlink leafygreen-ui-1kepx47" href="#project-fields-to-return-from-query" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="project-fields-to-return-from-query">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#return-all-fields-in-matching-documents" target="_self">
<span>
Return All Fields in Matching Documents
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#return-the-specified-fields-and-the-_id-field-only" target="_self">
<span>
Return the Specified Fields and the
<code class="css-1kekw28 e1wawog0">
_id
</code>
Field Only
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#suppress-_id-field" target="_self">
<span>
Suppress
<code class="css-1kekw28 e1wawog0">
_id
</code>
Field
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#return-all-but-the-excluded-fields" target="_self">
<span>
Return All But the Excluded Fields
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#return-specific-fields-in-embedded-documents" target="_self">
<span>
Return Specific Fields in Embedded Documents
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#suppress-specific-fields-in-embedded-documents" target="_self">
<span>
Suppress Specific Fields in Embedded Documents
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#projection-on-embedded-documents-in-an-array" target="_self">
<span>
Projection on Embedded Documents in an Array
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#project-specific-array-elements-in-the-returned-array" target="_self">
<span>
Project Specific Array Elements in the Returned Array
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#project-fields-with-aggregation-expressions" target="_self">
<span>
Project Fields with Aggregation Expressions
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#project-fields-to-return-from-a-query-with-mongodb-atlas" target="_self">
<span>
Project Fields to Return from a Query with MongoDB Atlas
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#additional-considerations" target="_self">
<span>
Additional Considerations
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
You can query embedded documents in MongoDB by using the following
methods:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Your programming language's driver.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/" target="_self">
<span>
MongoDB Atlas UI
</span>
</a>
. To learn more, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-project-fields-atlas-ui" target="_self">
<span>
Project Fields to Return from a Query with MongoDB Atlas
</span>
</a>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/compass/current/" target="_self">
<span>
MongoDB Compass
<!-- -->
.
</span>
</a>
</p>
</li>
</ul>
<hr class="css-1unva0n e4ru7ww0"/>
<p class="leafygreen-ui-1kp3ins">
➤
<!-- -->
Use the
<strong>
Select your language
</strong>
drop-down menu in the
upper-right to set the language of the following examples or select
MongoDB Compass.
</p>
<hr class="css-1unva0n e4ru7ww0"/>
<p class="leafygreen-ui-1kp3ins">
By default, queries in MongoDB return all fields in matching documents.
To limit the amount of data that MongoDB sends to applications, you can
include a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-projection">
projection
</a>
document to specify or restrict fields to
return.
</p>
<div aria-hidden="true">
</div>
<div class="leafygreen-ui-f2qztv" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-4">
<div aria-label="Tabs to describe usage of drivers" aria-orientation="horizontal" class="leafygreen-ui-m8p1vb lg-ui-tab-list-0000" data-lgid="lg-tabs-tab_list" role="tablist">
<button aria-controls="_vv6oie1rx" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_4ep28h8cs" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
MongoDB Shell
</div>
</button>
<button aria-controls="_tgd3atfc4" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_azymtxbng" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Compass
</div>
</button>
<button aria-controls="_692lf2ygp" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_zirm59b5d" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
C
</div>
</button>
<button aria-controls="_ej76w9wsb" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_0bz3uc5pt" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
C#
</div>
</button>
<button aria-controls="_9lio9lhk3" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_n87izd5pi" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Go
</div>
</button>
<button aria-controls="_5cpca90gf" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_djevtkxn8" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Java (Async)
</div>
</button>
<button aria-controls="_euo35eosu" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_314vw1enw" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Java (Sync)
</div>
</button>
<button aria-controls="_rtrq82hl5" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_35s26xk76" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Kotlin (Coroutine)
</div>
</button>
<button aria-controls="_wa8iqctjm" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_6jdmhth7e" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Motor
</div>
</button>
<button aria-controls="_ads7gahpt" aria-selected="true" class="leafygreen-ui-1l773z1" data-text="" id="_49nx8ujvb" name="" role="tab" tabindex="0">
<div class="leafygreen-ui-1nxuzmg">
Node.js
</div>
</button>
<button aria-controls="_xof731czz" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_kbgi49zog" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Perl
</div>
</button>
<button aria-controls="_ypda3mn02" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_6klak34ev" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
PHP
</div>
</button>
<button aria-controls="_i3t1a83cr" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_uhgva3tca" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Python
</div>
</button>
<button aria-controls="_2n3s3gy61" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_e8l0dfgb7" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Ruby
</div>
</button>
<button aria-controls="_ettdag32j" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_q9ak61dtt" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Scala
</div>
</button>
</div>
<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
</div>
</div>
<div class="lg-ui-tab-panels-0000" data-lgid="lg-tabs-tab_panels">
<div>
<div aria-labelledby="_5umszpv7b" class="leafygreen-ui-38lglc" id="_mxhjxpfzp" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
using the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
db.collection.find()
</code>
</a>
method in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
.
</span>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_jhpc3oibc" class="leafygreen-ui-38lglc" id="_sjfgzkvfz" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
using
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/compass/current/#std-label-compass-index" target="_self">
<span>
MongoDB Compass
<!-- -->
.
</span>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_xzrdgx1uj" class="leafygreen-ui-38lglc" id="_fnqwnffr2" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
using
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongoc.org/libmongoc/current/mongoc_collection_find_with_opts.html" rel="noopener noreferrer">
<span>
mongoc_collection_find_with_opts
<!-- -->
.
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_xh85fhkja" class="leafygreen-ui-38lglc" id="_z18yh49uq" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
using the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-csharp-driver/2.10/apidocs/html/M_MongoDB_Driver_MongoCollection_1_Find.htm" rel="noopener noreferrer">
<span>
MongoCollection.Find()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-csharp-driver/" rel="noopener noreferrer">
<span>
MongoDB C# Driver
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
.
</p>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_ajo6udqcr" class="leafygreen-ui-38lglc" id="_y4pvqcsrp" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
using the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://godoc.org/github.com/mongodb/mongo-go-driver/mongo#Collection.Find" rel="noopener noreferrer">
<span>
Collection.Find
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
function in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://github.com/mongodb/mongo-go-driver/" rel="noopener noreferrer">
<span>
MongoDB Go Driver
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
.
</p>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_xi7rf1n6n" class="leafygreen-ui-38lglc" id="_mnxllts3m" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
using the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver-reactivestreams/1.6/javadoc/com/mongodb/reactivestreams/client/MongoCollection.html#find()" rel="noopener noreferrer">
<span>
com.mongodb.reactivestreams.client.MongoCollection.find
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method in the MongoDB
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver-reactivestreams/1.6/" rel="noopener noreferrer">
<span>
Java Reactive Streams Driver
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
.
</p>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_qefrpfmh1" class="leafygreen-ui-38lglc" id="_4oxj7z8qi" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
using the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/MongoCollection.html#find--" rel="noopener noreferrer">
<span>
com.mongodb.client.MongoCollection.find
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method in the MongoDB
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/driver/" rel="noopener noreferrer">
<span>
Java Synchronous Driver
<!-- -->
.
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The driver provides
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Filters.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Filters
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
helper methods to facilitate the creation of filter
documents. The examples on this page use these methods to
create the filter documents.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_769gl9btt" class="leafygreen-ui-38lglc" id="_frlmnz87l" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
by using the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-mongo-collection/find.html" rel="noopener noreferrer">
<span>
MongoCollection.find()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method in the MongoDB
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/kotlin/coroutine/current/" target="_self">
<span>
Kotlin Coroutine Driver
<!-- -->
.
</span>
</a>
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The driver provides
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-core/com/mongodb/client/model/Filters.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Filters
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
helper methods to facilitate the creation of filter
documents. The examples on this page use these methods to
create the filter documents.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_chkz4p8n3" class="leafygreen-ui-38lglc" id="_sjvlecdrx" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
using the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://motor.readthedocs.io/en/stable/api-asyncio/asyncio_motor_collection.html#motor.motor_asyncio.AsyncIOMotorCollection.find" rel="noopener noreferrer">
<span>
<code class="leafygreen-ui-1l06pbn">
motor.motor_asyncio.AsyncIOMotorCollection.find
</code>
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://motor.readthedocs.io/en/stable/" rel="noopener noreferrer">
<span>
Motor
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
driver.
</p>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_h2o1hplqb" class="" id="_0hzgfliee" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
using the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/node-mongodb-native/3.6/api/Collection.html#find" rel="noopener noreferrer">
<span>
Collection.find()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method in
the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/node-mongodb-native/3.6/" rel="noopener noreferrer">
<span>
MongoDB Node.js Driver
<!-- -->
.
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_0ohmtrgjf" class="leafygreen-ui-38lglc" id="_7ew34b27a" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
using the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://metacpan.org/pod/MongoDB::Collection#find" rel="noopener noreferrer">
<span>
MongoDB::Collection::find()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method
in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://metacpan.org/release/MongoDB" rel="noopener noreferrer">
<span>
MongoDB Perl Driver
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
.
</p>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_jxbsxc6jb" class="leafygreen-ui-38lglc" id="_k3q2flep0" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
using the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/php-library/upcoming/reference/method/MongoDBCollection-find/#mongodb-phpmethod-phpmethod.MongoDB-Collection--find--" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
MongoDB\\Collection::find()
</code>
</span>
</a>
method in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/php-libraries/" target="_self">
<span>
MongoDB PHP Library
</span>
</a>
.
</p>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_b8jtwckcb" class="leafygreen-ui-38lglc" id="_8vjjdzygw" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
using the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://pymongo.readthedocs.io/en/stable/api/pymongo/collection.html#pymongo.collection.Collection.find" rel="noopener noreferrer">
<span>
<code class="leafygreen-ui-1l06pbn">
pymongo.collection.Collection.find
</code>
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/languages/python/pymongo-driver/current/" target="_self">
<span>
PyMongo
</span>
</a>
Python driver.
</p>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_behscgcrs" class="leafygreen-ui-38lglc" id="_c9m8i70qn" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
using the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://api.mongodb.com/ruby/current/Mongo/Collection.html#find-instance_method" target="_self">
<span>
Mongo::Collection#find()
</span>
</a>
method in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/ruby-driver/current/" target="_self">
<span>
MongoDB Ruby Driver
<!-- -->
.
</span>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_m2im2ic6z" class="leafygreen-ui-38lglc" id="_7z3lxbhwo" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
This page provides examples of
<!-- -->
query operations with projection
<!-- -->
using the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-scala-driver/2.9/scaladoc/org/mongodb/scala/MongoCollection.html#find[C](filter:org.mongodb.scala.bson.conversions.Bson)(implicite:org.mongodb.scala.bson.DefaultHelper.DefaultsTo[C,TResult],implicitct:scala.reflect.ClassTag[C]):org.mongodb.scala.FindObservable[C]" rel="noopener noreferrer">
<span>
collection.find()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
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</path>
</svg>
</a>
method
in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-scala-driver/" rel="noopener noreferrer">
<span>
MongoDB Scala Driver
</span>
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</path>
</svg>
</a>
.
</p>
<p class="leafygreen-ui-1kp3ins">
The examples on this page use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Connect to a
test database in your MongoDB instance then create the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection:
</p>
</div>
</div>
</div>
</div>
</div>
<div aria-hidden="true">
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Compass
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C#
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Java (Async)
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Java (Sync)
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Kotlin (Coroutine)
</div>
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Motor
</div>
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Perl
</div>
</button>
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PHP
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Python
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Ruby
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Scala
</div>
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</div>
</div>
</div>
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<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.insertMany( [\n { item: \"journal\", status: \"A\", size: { h: 14, w: 21, uom: \"cm\" }, instock: [ { warehouse: \"A\", qty: 5 } ] },\n { item: \"notebook\", status: \"A\", size: { h: 8.5, w: 11, uom: \"in\" }, instock: [ { warehouse: \"C\", qty: 5 } ] },\n { item: \"paper\", status: \"D\", size: { h: 8.5, w: 11, uom: \"in\" }, instock: [ { warehouse: \"A\", qty: 60 } ] },\n { item: \"planner\", status: \"D\", size: { h: 22.85, w: 30, uom: \"cm\" }, instock: [ { warehouse: \"A\", qty: 40 } ] },\n { item: \"postcard\", status: \"A\", size: { h: 10, w: 15.25, uom: \"cm\" }, instock: [ { warehouse: \"B\", qty: 15 }, { warehouse: \"C\", qty: 35 } ] }\n]);","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"journal"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">14</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">21</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">"cm"</span> }<!-- -->, <span class="lg-highlight-attr">instock</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">5</span> } ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"notebook"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">11</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">"in"</span> }<!-- -->, <span class="lg-highlight-attr">instock</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">"C"</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">5</span> } ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"paper"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"D"</span>, <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">11</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">"in"</span> }<!-- -->, <span class="lg-highlight-attr">instock</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">60</span> } ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"planner"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"D"</span>, <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">22.85</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">30</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">"cm"</span> }<!-- -->, <span class="lg-highlight-attr">instock</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">40</span> } ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"postcard"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">15.25</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">"cm"</span> }<!-- -->, <span class="lg-highlight-attr">instock</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">"B"</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">15</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">"C"</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">35</span> } ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])<!-- -->;</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
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<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"journal"</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"size"</span>: <!-- -->{ <span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">14</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">21</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"cm"</span> }<!-- -->, <span class="lg-highlight-string">"instock"</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">5</span> } ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"notebook"</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"size"</span>: <!-- -->{ <span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">11</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"in"</span> }<!-- -->, <span class="lg-highlight-string">"instock"</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"C"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">5</span> } ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"paper"</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"D"</span>, <span class="lg-highlight-string">"size"</span>: <!-- -->{ <span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">11</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"in"</span> }<!-- -->, <span class="lg-highlight-string">"instock"</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">60</span> } ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"planner"</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"D"</span>, <span class="lg-highlight-string">"size"</span>: <!-- -->{ <span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">22.85</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">30</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"cm"</span> }<!-- -->, <span class="lg-highlight-string">"instock"</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">40</span> } ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"postcard"</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"size"</span>: <!-- -->{ <span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">15.25</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"cm"</span> }<!-- -->, <span class="lg-highlight-string">"instock"</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"B"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">15</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"C"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">35</span> } ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
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For instructions on inserting documents in MongoDB Compass,
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Insert Documents
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"mongoc_collection_t *collection;\nmongoc_bulk_operation_t *bulk;\nbson_t *doc;\nbool r;\nbson_error_t error;\nbson_t reply;\n\ncollection = mongoc_database_get_collection (db, \"inventory\");\nbulk = mongoc_collection_create_bulk_operation_with_opts (collection, NULL);\ndoc = BCON_NEW (\n \"item\", BCON_UTF8 (\"journal\"),\n \"status\", BCON_UTF8 (\"A\"),\n \"size\", \"{\",\n \"h\", BCON_DOUBLE (14),\n \"w\", BCON_DOUBLE (21),\n \"uom\", BCON_UTF8 (\"cm\"),\n \"}\",\n \"instock\", \"[\",\n \"{\",\n \"warehouse\", BCON_UTF8 (\"A\"),\n \"qty\", BCON_INT64 (5),\n \"}\",\n \"]\");\n\nr = mongoc_bulk_operation_insert_with_opts (bulk, doc, NULL, &error);\nbson_destroy (doc);\nif (!r) {\n MONGOC_ERROR (\"%s\\n\", error.message);\n goto done;\n}\n\ndoc = BCON_NEW (\n \"item\", BCON_UTF8 (\"notebook\"),\n \"status\", BCON_UTF8 (\"A\"),\n \"size\", \"{\",\n \"h\", BCON_DOUBLE (8.5),\n \"w\", BCON_DOUBLE (11),\n \"uom\", BCON_UTF8 (\"in\"),\n \"}\",\n \"instock\", \"[\",\n \"{\",\n \"warehouse\", BCON_UTF8 (\"C\"),\n \"qty\", BCON_INT64 (5),\n \"}\",\n \"]\");\n\nr = mongoc_bulk_operation_insert_with_opts (bulk, doc, NULL, &error);\nbson_destroy (doc);\nif (!r) {\n MONGOC_ERROR (\"%s\\n\", error.message);\n goto done;\n}\n\ndoc = BCON_NEW (\n \"item\", BCON_UTF8 (\"paper\"),\n \"status\", BCON_UTF8 (\"D\"),\n \"size\", \"{\",\n \"h\", BCON_DOUBLE (8.5),\n \"w\", BCON_DOUBLE (11),\n \"uom\", BCON_UTF8 (\"in\"),\n \"}\",\n \"instock\", \"[\",\n \"{\",\n \"warehouse\", BCON_UTF8 (\"A\"),\n \"qty\", BCON_INT64 (60),\n \"}\",\n \"]\");\n\nr = mongoc_bulk_operation_insert_with_opts (bulk, doc, NULL, &error);\nbson_destroy (doc);\nif (!r) {\n MONGOC_ERROR (\"%s\\n\", error.message);\n goto done;\n}\n\ndoc = BCON_NEW (\n \"item\", BCON_UTF8 (\"planner\"),\n \"status\", BCON_UTF8 (\"D\"),\n \"size\", \"{\",\n \"h\", BCON_DOUBLE (22.85),\n \"w\", BCON_DOUBLE (30),\n \"uom\", BCON_UTF8 (\"cm\"),\n \"}\",\n \"instock\", \"[\",\n \"{\",\n \"warehouse\", BCON_UTF8 (\"A\"),\n \"qty\", BCON_INT64 (40),\n \"}\",\n \"]\");\n\nr = mongoc_bulk_operation_insert_with_opts (bulk, doc, NULL, &error);\nbson_destroy (doc);\nif (!r) {\n MONGOC_ERROR (\"%s\\n\", error.message);\n goto done;\n}\n\ndoc = BCON_NEW (\n \"item\", BCON_UTF8 (\"postcard\"),\n \"status\", BCON_UTF8 (\"A\"),\n \"size\", \"{\",\n \"h\", BCON_DOUBLE (10),\n \"w\", BCON_DOUBLE (15.25),\n \"uom\", BCON_UTF8 (\"cm\"),\n \"}\",\n \"instock\", \"[\",\n \"{\",\n \"warehouse\", BCON_UTF8 (\"B\"),\n \"qty\", BCON_INT64 (15),\n \"}\",\"{\",\n \"warehouse\", BCON_UTF8 (\"C\"),\n \"qty\", BCON_INT64 (35),\n \"}\",\n \"]\");\n\nr = mongoc_bulk_operation_insert_with_opts (bulk, doc, NULL, &error);\nbson_destroy (doc);\nif (!r) {\n MONGOC_ERROR (\"%s\\n\", error.message);\n goto done;\n}\n\n/* \"reply\" is initialized on success or error */\nr = (bool) mongoc_bulk_operation_execute (bulk, &reply, &error);\nif (!r) {\n MONGOC_ERROR (\"%s\\n\", error.message);\n}","programmingLanguage":"C"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_bulk_operation_t *bulk;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *doc;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bool r;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_error_t error;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t reply;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bulk <!-- -->= <!-- -->mongoc_collection_create_bulk_operation_with_opts (collection<!-- -->, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">doc <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"journal"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"A"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"h"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_DOUBLE</span> (<!-- --><span class="lg-highlight-number">14</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"w"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_DOUBLE</span> (<!-- --><span class="lg-highlight-number">21</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"uom"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"cm"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"}"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"["</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"warehouse"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"A"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"qty"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">5</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"}"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"]"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">r <!-- -->= <!-- -->mongoc_bulk_operation_insert_with_opts (bulk<!-- -->, doc, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>, &error);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_destroy <!-- -->(<!-- -->doc);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">if</span> <!-- -->(<!-- -->!r) {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- --><span class="lg-highlight-variable lg-highlight-constant">MONGOC_ERROR</span> (<span class="lg-highlight-string">"%s</span><!-- --><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">"</span>, error.<span class="lg-highlight-property">message</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> goto done;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">doc <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"notebook"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"A"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"h"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_DOUBLE</span> (<!-- --><span class="lg-highlight-number">8.5</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"w"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_DOUBLE</span> (<!-- --><span class="lg-highlight-number">11</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"uom"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"in"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"}"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"["</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"warehouse"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"C"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"qty"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">5</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"}"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"]"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">r <!-- -->= <!-- -->mongoc_bulk_operation_insert_with_opts (bulk<!-- -->, doc, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>, &error);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_destroy <!-- -->(<!-- -->doc);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">if</span> <!-- -->(<!-- -->!r) {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- --><span class="lg-highlight-variable lg-highlight-constant">MONGOC_ERROR</span> (<span class="lg-highlight-string">"%s</span><!-- --><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">"</span>, error.<span class="lg-highlight-property">message</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> goto done;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">doc <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"paper"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"D"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"h"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_DOUBLE</span> (<!-- --><span class="lg-highlight-number">8.5</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"w"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_DOUBLE</span> (<!-- --><span class="lg-highlight-number">11</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"uom"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"in"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"}"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"["</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"warehouse"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"A"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"qty"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">60</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"}"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"]"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">r <!-- -->= <!-- -->mongoc_bulk_operation_insert_with_opts (bulk<!-- -->, doc, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>, &error);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_destroy <!-- -->(<!-- -->doc);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">if</span> <!-- -->(<!-- -->!r) {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- --><span class="lg-highlight-variable lg-highlight-constant">MONGOC_ERROR</span> (<span class="lg-highlight-string">"%s</span><!-- --><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">"</span>, error.<span class="lg-highlight-property">message</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> goto done;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">doc <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"planner"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"D"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"h"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_DOUBLE</span> (<!-- --><span class="lg-highlight-number">22.85</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"w"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_DOUBLE</span> (<!-- --><span class="lg-highlight-number">30</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"uom"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"cm"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"}"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"["</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"warehouse"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"A"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"qty"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">40</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"}"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"]"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">r <!-- -->= <!-- -->mongoc_bulk_operation_insert_with_opts (bulk<!-- -->, doc, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>, &error);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_destroy <!-- -->(<!-- -->doc);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">if</span> <!-- -->(<!-- -->!r) {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- --><span class="lg-highlight-variable lg-highlight-constant">MONGOC_ERROR</span> (<span class="lg-highlight-string">"%s</span><!-- --><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">"</span>, error.<span class="lg-highlight-property">message</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> goto done;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">doc <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"postcard"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"A"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"h"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_DOUBLE</span> (<!-- --><span class="lg-highlight-number">10</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"w"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_DOUBLE</span> (<!-- --><span class="lg-highlight-number">15.25</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"uom"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"cm"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"}"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"["</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"warehouse"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"B"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"qty"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">15</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"}"</span>,<span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"warehouse"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> (<!-- --><span class="lg-highlight-string">"C"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"qty"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">35</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"}"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"]"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">r <!-- -->= <!-- -->mongoc_bulk_operation_insert_with_opts (bulk<!-- -->, doc, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>, &error);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_destroy <!-- -->(<!-- -->doc);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">if</span> <!-- -->(<!-- -->!r) {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- --><span class="lg-highlight-variable lg-highlight-constant">MONGOC_ERROR</span> (<span class="lg-highlight-string">"%s</span><!-- --><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">"</span>, error.<span class="lg-highlight-property">message</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> goto done;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">/* "reply"</span><span class="lg-highlight-comment"> is initialized on </span><span class="lg-highlight-comment">success or error */</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">r <!-- -->= <!-- -->(bool) mongoc_bulk_operation_execute (<!-- -->bulk<!-- -->, <!-- -->&reply, &error);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">if</span> <!-- -->(<!-- -->!r) {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- --><span class="lg-highlight-variable lg-highlight-constant">MONGOC_ERROR</span> (<span class="lg-highlight-string">"%s</span><!-- --><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">"</span>, error.<span class="lg-highlight-property">message</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-50-menu" aria-describedby="select-50-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-51" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> documents = <span class="lg-highlight-keyword">new</span>[]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"journal"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span> { { <span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">14</span> }, { <span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">21</span> }, { <span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"cm"</span> } } },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonArray</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span> { { <span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"A"</span> }, { <span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">5</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"notebook"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span> { { <span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">8.5</span> }, { <span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">11</span> }, { <span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"in"</span> } } },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonArray</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span> { { <span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"C"</span> }, { <span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">5</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"paper"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"D"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span> { { <span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">8.5</span> }, { <span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">11</span> }, { <span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"in"</span> } } },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonArray</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span> { { <span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"A"</span> }, { <span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">60</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"planner"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"D"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span> { { <span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">22.85</span> }, { <span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">30</span> }, { <span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"cm"</span> } } },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonArray</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span> { { <span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"A"</span> }, { <span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">40</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"postcard"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span> { { <span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">10</span> }, { <span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">15.25</span> }, { <span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"cm"</span> } } },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonArray</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span> { { <span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"B"</span> }, { <span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">15</span> } },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">BsonDocument</span> { { <span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"C"</span> }, { <span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">35</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">};</td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection.<span class="lg-highlight-title lg-highlight-class">InsertMany</span>(documents);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">docs <!-- -->:<!-- -->= []interface{}{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"journal"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"size"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">14</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">21</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"cm"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">A</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">5</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"notebook"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"size"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">8.5</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">11</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"in"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">A</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"EC"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">5</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"paper"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"D"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"size"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">8.5</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">11</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"in"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">A</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">60</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"planner"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"D"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"size"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">22.85</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">30</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"cm"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">A</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">40</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"postcard"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"size"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">10</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">15.25</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"cm"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">A</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"B"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">15</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"EC"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">35</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">result<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">InsertMany</span>(context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(), docs)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">Publisher</span><<span class="lg-highlight-title lg-highlight-class">Success</span>> insertManyPublisher = collection.<span class="lg-highlight-title lg-highlight-function">insertMany</span>(<span class="lg-highlight-title lg-highlight-function">asList</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>.<span class="lg-highlight-title lg-highlight-function">parse</span>(<span class="lg-highlight-string">"{ item: 'journal', status: 'A', size: { h: 14, w: 21, uom: 'cm' }, instock: [ { warehouse: 'A', qty: 5 }]}"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>.<span class="lg-highlight-title lg-highlight-function">parse</span>(<span class="lg-highlight-string">"{ item: 'notebook', status: 'A', size: { h: 8.5, w: 11, uom: 'in' }, instock: [ { warehouse: 'C', qty: 5}]}"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>.<span class="lg-highlight-title lg-highlight-function">parse</span>(<span class="lg-highlight-string">"{ item: 'paper', status: 'D', size: { h: 8.5, w: 11, uom: 'in' }, instock: [ { warehouse: 'A', qty: 60 }]}"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>.<span class="lg-highlight-title lg-highlight-function">parse</span>(<span class="lg-highlight-string">"{ item: 'planner', status: 'D', size: { h: 22.85, w: 30, uom: 'cm' }, instock: [ { warehouse: 'A', qty: 40}]}"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>.<span class="lg-highlight-title lg-highlight-function">parse</span>(<span class="lg-highlight-string">"{ item: 'postcard', status: 'A', size: { h: 10, w: 15.25, uom: 'cm' }, "</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> + <span class="lg-highlight-string">"instock: [ { warehouse: 'B', qty: 15 }, { warehouse: 'C', qty: 35 } ] }"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">));</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">collection.<span class="lg-highlight-title lg-highlight-function">insertMany</span>(<span class="lg-highlight-title lg-highlight-function">asList</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>.<span class="lg-highlight-title lg-highlight-function">parse</span>(<span class="lg-highlight-string">"{ item: 'journal', status: 'A', size: { h: 14, w: 21, uom: 'cm' }, instock: [ { warehouse: 'A', qty: 5 }]}"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>.<span class="lg-highlight-title lg-highlight-function">parse</span>(<span class="lg-highlight-string">"{ item: 'notebook', status: 'A', size: { h: 8.5, w: 11, uom: 'in' }, instock: [ { warehouse: 'C', qty: 5}]}"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>.<span class="lg-highlight-title lg-highlight-function">parse</span>(<span class="lg-highlight-string">"{ item: 'paper', status: 'D', size: { h: 8.5, w: 11, uom: 'in' }, instock: [ { warehouse: 'A', qty: 60 }]}"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>.<span class="lg-highlight-title lg-highlight-function">parse</span>(<span class="lg-highlight-string">"{ item: 'planner', status: 'D', size: { h: 22.85, w: 30, uom: 'cm' }, instock: [ { warehouse: 'A', qty: 40}]}"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>.<span class="lg-highlight-title lg-highlight-function">parse</span>(<span class="lg-highlight-string">"{ item: 'postcard', status: 'A', size: { h: 10, w: 15.25, uom: 'cm' }, "</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> + <span class="lg-highlight-string">"instock: [ { warehouse: 'B', qty: 15 }, { warehouse: 'C', qty: 35 } ] }"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">));</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">collection.<span class="lg-highlight-title lg-highlight-function">insertMany</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-function">listOf</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"journal"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">14</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">21</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"cm"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-title lg-highlight-function">listOf</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"A"</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">5</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> )),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"notebook"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">8.5</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">11</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"in"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-title lg-highlight-function">listOf</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"C"</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">5</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> )),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"paper"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"D"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">8.5</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">11</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"in"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-title lg-highlight-function">listOf</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"A"</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">60</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> )),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"planner"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"D"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">22.85</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">30</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"cm"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-title lg-highlight-function">listOf</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"A"</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">40</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> )),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"postcard"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"size"</span>, <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"h"</span>, <span class="lg-highlight-number">10</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"w"</span>, <span class="lg-highlight-number">15.25</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"uom"</span>, <span class="lg-highlight-string">"cm"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-title lg-highlight-function">listOf</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"B"</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">15</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">"warehouse"</span>, <span class="lg-highlight-string">"C"</span>).<span class="lg-highlight-title lg-highlight-function">append</span>(<span class="lg-highlight-string">"qty"</span>, <span class="lg-highlight-number">35</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> )),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> )</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">await</span> db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">insert_many</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"journal"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>: {<span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">14</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">21</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"cm"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>: [{<span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">5</span>}],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"notebook"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>: {<span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">11</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"in"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>: [{<span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"C"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">5</span>}],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"paper"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"D"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>: {<span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">11</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"in"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>: [{<span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">60</span>}],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"planner"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"D"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>: {<span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">22.85</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">30</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"cm"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>: [{<span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">40</span>}],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"postcard"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>: {<span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">15.25</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"cm"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>: [{<span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"B"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">15</span>}, {<span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"C"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">35</span>}],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">await</span> db.<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>).<span class="lg-highlight-title lg-highlight-function">insertMany</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'journal'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">14</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">21</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">'cm'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">instock</span>: <!-- -->[<!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">'A'</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">5</span> }]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'notebook'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">11</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">'in'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">instock</span>: <!-- -->[<!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">'C'</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">5</span> }]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'paper'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'D'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">11</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">'in'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">instock</span>: <!-- -->[<!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">'A'</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">60</span> }]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'planner'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'D'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">22.85</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">30</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">'cm'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">instock</span>: <!-- -->[<!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">'A'</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">40</span> }]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'postcard'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">15.25</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">'cm'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">instock</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">'B'</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">15</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">'C'</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">35</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">insert_many</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"journal"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">status</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">size</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">h</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">14</span>, <span class="lg-highlight-params lg-highlight-function">w</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">21</span>, <span class="lg-highlight-params lg-highlight-function">uom</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"cm"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->[ { <span class="lg-highlight-params lg-highlight-function">warehouse</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-params lg-highlight-function">qty</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">5</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"notebook"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">status</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">size</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">h</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-params lg-highlight-function">w</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">11</span>, <span class="lg-highlight-params lg-highlight-function">uom</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"in"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->[ { <span class="lg-highlight-params lg-highlight-function">warehouse</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"C"</span>, <span class="lg-highlight-params lg-highlight-function">qty</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">5</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"paper"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">status</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"D"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">size</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">h</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-params lg-highlight-function">w</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">11</span>, <span class="lg-highlight-params lg-highlight-function">uom</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"in"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->[ { <span class="lg-highlight-params lg-highlight-function">warehouse</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-params lg-highlight-function">qty</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">60</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"planner"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">status</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"D"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">size</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">h</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">22.85</span>, <span class="lg-highlight-params lg-highlight-function">w</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">30</span>, <span class="lg-highlight-params lg-highlight-function">uom</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"cm"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->[ { <span class="lg-highlight-params lg-highlight-function">warehouse</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-params lg-highlight-function">qty</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">40</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"postcard"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">status</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">size</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">h</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">10</span>, <span class="lg-highlight-params lg-highlight-function">w</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">15.25</span>, <span class="lg-highlight-params lg-highlight-function">uom</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"cm"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">warehouse</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"B"</span>, <span class="lg-highlight-params lg-highlight-function">qty</span><span class="lg-highlight-function"> =></span> <!-- --><span class="lg-highlight-number">15</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">warehouse</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"C"</span>, <span class="lg-highlight-params lg-highlight-function">qty</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">35</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$insertManyResult = $db->inventory-><span class="lg-highlight-title lg-highlight-function">insertMany</span>([</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-string">'journal'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'size'</span> => [<span class="lg-highlight-string">'h'</span> => <span class="lg-highlight-number">14</span>, <span class="lg-highlight-string">'w'</span> => <span class="lg-highlight-number">21</span>, <span class="lg-highlight-string">'uom'</span> => <span class="lg-highlight-string">'cm'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> => [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'warehouse'</span> => <span class="lg-highlight-string">'A'</span>, <span class="lg-highlight-string">'qty'</span> => <span class="lg-highlight-number">5</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-string">'notebook'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'size'</span> => [<span class="lg-highlight-string">'h'</span> => <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-string">'w'</span> => <span class="lg-highlight-number">11</span>, <span class="lg-highlight-string">'uom'</span> => <span class="lg-highlight-string">'in'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> => [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'warehouse'</span> => <span class="lg-highlight-string">'C'</span>, <span class="lg-highlight-string">'qty'</span> => <span class="lg-highlight-number">5</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-string">'paper'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'D'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'size'</span> => [<span class="lg-highlight-string">'h'</span> => <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-string">'w'</span> => <span class="lg-highlight-number">11</span>, <span class="lg-highlight-string">'uom'</span> => <span class="lg-highlight-string">'in'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> => [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'warehouse'</span> => <span class="lg-highlight-string">'A'</span>, <span class="lg-highlight-string">'qty'</span> => <span class="lg-highlight-number">60</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-string">'planner'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'D'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'size'</span> => [<span class="lg-highlight-string">'h'</span> => <span class="lg-highlight-number">22.85</span>, <span class="lg-highlight-string">'w'</span> => <span class="lg-highlight-number">30</span>, <span class="lg-highlight-string">'uom'</span> => <span class="lg-highlight-string">'cm'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span 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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">insert_many</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"journal"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>: {<span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">14</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">21</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"cm"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>: [{<span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">5</span>}],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"notebook"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>: {<span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">11</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"in"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>: [{<span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"C"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">5</span>}],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"paper"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"D"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>: {<span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">11</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"in"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>: [{<span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">60</span>}],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"planner"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"D"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>: {<span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">22.85</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">30</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"cm"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>: [{<span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">40</span>}],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"postcard"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"size"</span>: {<span class="lg-highlight-string">"h"</span>: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-string">"w"</span>: <span class="lg-highlight-number">15.25</span>, <span class="lg-highlight-string">"uom"</span>: <span class="lg-highlight-string">"cm"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"instock"</span>: [{<span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"B"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">15</span>}, {<span class="lg-highlight-string">"warehouse"</span>: <span class="lg-highlight-string">"C"</span>, <span class="lg-highlight-string">"qty"</span>: <span class="lg-highlight-number">35</span>}],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">insert_many</span>(<!-- -->[<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'journal'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">14</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">21</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">'cm'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">instock</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">'A'</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">5</span> }] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'notebook'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">11</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">'in'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">instock</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">'C'</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">5</span> }] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'paper'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'D'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">8.5</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">11</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">'in'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">instock</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">'A'</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">60</span> }] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'planner'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'D'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">22.85</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">30</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">'cm'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">instock</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">'A'</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">40</span> }] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'postcard'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">size</span>: <!-- -->{ <span class="lg-highlight-attr">h</span>: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">15.25</span>, <span class="lg-highlight-attr">uom</span>: <span class="lg-highlight-string">'cm'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">instock</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">'B'</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">15</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">warehouse</span>: <span class="lg-highlight-string">'C'</span>, <span class="lg-highlight-attr">qty</span>: <span class="lg-highlight-number">35</span> }] }])</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">collection.<span class="lg-highlight-title lg-highlight-function">insertMany</span>(<span class="lg-highlight-title lg-highlight-class">Seq</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">""</span><span class="lg-highlight-string">"{ item: "</span>journal<span class="lg-highlight-string">", status: "</span>A<span class="lg-highlight-string">", size: { h: 14, w: 21, uom: "</span>cm<span class="lg-highlight-string">" }, instock: [ { warehouse: "</span>A<span class="lg-highlight-string">", qty: 5 } ] }"</span><span class="lg-highlight-string">""</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">""</span><span class="lg-highlight-string">"{ item: "</span>notebook<span class="lg-highlight-string">", status: "</span>A<span class="lg-highlight-string">", size: { h: 8.5, w: 11, uom: "</span><span class="lg-highlight-keyword">in</span><span class="lg-highlight-string">" }, instock: [ { warehouse: "</span>C<span class="lg-highlight-string">", qty: 5 } ] }"</span><span class="lg-highlight-string">""</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">""</span><span class="lg-highlight-string">"{ item: "</span>paper<span class="lg-highlight-string">", status: "</span>D<span class="lg-highlight-string">", size: { h: 8.5, w: 11, uom: "</span><span class="lg-highlight-keyword">in</span><span class="lg-highlight-string">" }, instock: [ { warehouse: "</span>A<span class="lg-highlight-string">", qty: 60 } ] }"</span><span class="lg-highlight-string">""</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">""</span><span class="lg-highlight-string">"{ item: "</span>planner<span class="lg-highlight-string">", status: "</span>D<span class="lg-highlight-string">", size: { h: 22.85, w: 30, uom: "</span>cm<span class="lg-highlight-string">" }, instock: [ { warehouse: "</span>A<span class="lg-highlight-string">", qty: 40 } ] }"</span><span class="lg-highlight-string">""</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-class">Document</span>(<span class="lg-highlight-string">""</span><span class="lg-highlight-string">"{ item: "</span>postcard<span class="lg-highlight-string">", status: "</span>A<span class="lg-highlight-string">", size: { h: 10, w: 15.25, uom: "</span>cm<span class="lg-highlight-string">" },</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string"> instock: [ { warehouse: "</span>B<span class="lg-highlight-string">", qty: 15 }, { warehouse: "</span>C<span class="lg-highlight-string">", qty: 35 } ] }"</span><span class="lg-highlight-string">""</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">)).<span class="lg-highlight-title lg-highlight-function">execute</span>()</td></tr></tbody></table></code></pre>
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</div>
</div>
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</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Return All Fields in Matching Documents
<a class="headerlink leafygreen-ui-1kepx47" href="#return-all-fields-in-matching-documents" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="return-all-fields-in-matching-documents">
</div>
</a>
</h2>
<div aria-hidden="true">
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Java (Async)
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Java (Sync)
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Kotlin (Coroutine)
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Node.js
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Perl
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PHP
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Scala
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<div class="lg-ui-tab-panels-0000" data-lgid="lg-tabs-tab_panels">
<div>
<div aria-labelledby="_3c9sigkep" class="leafygreen-ui-38lglc" id="_zll49oe40" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
If you do not specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-projection">
projection
</a>
document, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
db.collection.find()
</code>
</a>
method returns all fields in the
matching documents.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_emdpwzju8" class="leafygreen-ui-38lglc" id="_ac5zv4aqw" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
If you do not specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-projection">
projection
</a>
document, Compass
returns all fields in the matching documents.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_rs76k8a52" class="leafygreen-ui-38lglc" id="_ep0xnxmk4" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
If you do not specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-projection">
projection
</a>
filter, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-csharp-driver/2.10/apidocs/html/M_MongoDB_Driver_MongoCollection_1_Find.htm" rel="noopener noreferrer">
<span>
MongoCollection.Find()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method returns all fields in the matching documents.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_a2gz7q8vg" class="leafygreen-ui-38lglc" id="_1bxmp55yp" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
If you do not specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-projection">
projection
</a>
, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver-reactivestreams/1.6/javadoc/com/mongodb/reactivestreams/client/MongoCollection.html#find(org.bson.conversions.Bson)" rel="noopener noreferrer">
<span>
com.mongodb.reactivestreams.client.MongoCollection.find
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method returns all fields in the matching documents.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_t6xqufytl" class="leafygreen-ui-38lglc" id="_8xlorp0fd" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
If you do not specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-projection">
projection
</a>
, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/MongoCollection.html#find--" rel="noopener noreferrer">
<span>
com.mongodb.client.MongoCollection.find
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method returns all
fields in the matching documents.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_o58at1rfx" class="leafygreen-ui-38lglc" id="_lszz6wl7z" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
If you do not specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-projection">
projection
</a>
document, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-mongo-collection/find.html" rel="noopener noreferrer">
<span>
MongoCollection.find()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method returns all
fields in the matching documents.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_62ie9k3ah" class="" id="_66eflnwtm" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
If you do not specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-projection">
projection
</a>
document, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/node-mongodb-native/3.6/api/Collection.html#find" rel="noopener noreferrer">
<span>
find()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method yields all
fields in the matching documents.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_y84yxwl1b" class="leafygreen-ui-38lglc" id="_yoxn231d6" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
If you do not specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-projection">
projection
</a>
document, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://metacpan.org/pod/MongoDB::Collection#find" rel="noopener noreferrer">
<span>
find()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method returns all fields in the matching documents.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_uao7h8hf3" class="leafygreen-ui-38lglc" id="_ish5p07eb" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
If you do not specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-projection">
projection
</a>
document, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/php-library/upcoming/reference/method/MongoDBCollection-find/#mongodb-phpmethod-phpmethod.MongoDB-Collection--find--" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
find()
</code>
</span>
</a>
method returns all fields in the matching documents.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_pe892frb7" class="leafygreen-ui-38lglc" id="_jdiokuq0l" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
If you do not specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-projection">
projection
</a>
document, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://pymongo.readthedocs.io/en/stable/api/pymongo/collection.html#pymongo.collection.Collection.find" rel="noopener noreferrer">
<span>
<code class="leafygreen-ui-1l06pbn">
find
</code>
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method returns
all fields in the matching documents.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_m9aev5jov" class="leafygreen-ui-38lglc" id="_2x6krn2xn" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
If you do not specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-projection">
projection
</a>
document, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://api.mongodb.com/ruby/current/Mongo/Collection.html#find-instance_method" target="_self">
<span>
find()
</span>
</a>
method returns all fields in the matching documents.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_179ya9pk2" class="leafygreen-ui-38lglc" id="_k7jjvv1m3" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
If you do not specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-projection">
projection
</a>
, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-scala-driver/2.9/scaladoc/org/mongodb/scala/MongoCollection.html#find[C](filter:org.mongodb.scala.bson.conversions.Bson)(implicite:org.mongodb.scala.bson.DefaultHelper.DefaultsTo[C,TResult],implicitct:scala.reflect.ClassTag[C]):org.mongodb.scala.FindObservable[C]" rel="noopener noreferrer">
<span>
collection.find()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method returns all fields in the matching documents.
</p>
</div>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following example returns all fields from all documents in the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection where the
<code class="leafygreen-ui-1l06pbn">
status
</code>
equals
<code class="leafygreen-ui-1l06pbn">
"A"
</code>
:
</p>
<div aria-hidden="true">
</div>
<div class="leafygreen-ui-f2qztv" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-8">
<div aria-label="Tabs to describe usage of drivers" aria-orientation="horizontal" class="leafygreen-ui-m8p1vb lg-ui-tab-list-0000" data-lgid="lg-tabs-tab_list" role="tablist">
<button aria-controls="_dlimzr1u9" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_x1l5jjbsp" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
MongoDB Shell
</div>
</button>
<button aria-controls="_dlphn2vpr" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_79oxe30qj" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Compass
</div>
</button>
<button aria-controls="_y5om1x4q4" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_ccml8hwo1" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
C
</div>
</button>
<button aria-controls="_2k43jnb8g" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_osj2svk1m" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
C#
</div>
</button>
<button aria-controls="_jwogvju0e" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_ploppvwwd" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Go
</div>
</button>
<button aria-controls="_idqii29id" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_433affy8n" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Java (Async)
</div>
</button>
<button aria-controls="_vktzj0msx" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_55c8tul0z" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Java (Sync)
</div>
</button>
<button aria-controls="_edhwfyusy" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_u4uw5lbak" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Kotlin (Coroutine)
</div>
</button>
<button aria-controls="_acu1jlsal" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_2n4imf0u0" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Motor
</div>
</button>
<button aria-controls="_vpn4xkmed" aria-selected="true" class="leafygreen-ui-1l773z1" data-text="" id="_1kva37kcl" name="" role="tab" tabindex="0">
<div class="leafygreen-ui-1nxuzmg">
Node.js
</div>
</button>
<button aria-controls="_fwjtvt2hk" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_xr2up5ei3" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Perl
</div>
</button>
<button aria-controls="_h7agtgjr3" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_njx7pd7hp" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
PHP
</div>
</button>
<button aria-controls="_nimy36wsc" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_d573w6krl" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Python
</div>
</button>
<button aria-controls="_k7v0strvy" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_gqd302etp" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Ruby
</div>
</button>
<button aria-controls="_k4fx2h99r" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_78lvr9lel" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Scala
</div>
</button>
</div>
<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
</div>
</div>
<div class="lg-ui-tab-panels-0000" data-lgid="lg-tabs-tab_panels">
<div>
<div aria-labelledby="_gjhqrby95" class="leafygreen-ui-38lglc" id="_8fwvuxk6w" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-89-menu" aria-describedby="select-89-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-90" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
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</mask>
<g mask="url(#mask1_2131_12968)">
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Node.js
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<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
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field:
</p>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection, filter<!-- -->, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-title lg-highlight-class">Find</span>(filter).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{{<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>}},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">FindPublisher</span><<span class="lg-highlight-title lg-highlight-class">Document</span>> findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>));</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>({<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>})</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db.<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>).<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">})<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> } );</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"var findObservable = collection.find(equal(\"status\", \"A\"))","programmingLanguage":"Scala"}
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr></tbody></table></code></pre>
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The operation corresponds to the following SQL statement:
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"SELECT * from inventory WHERE status = \"A\"","programmingLanguage":"SQL"}
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light sql leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">SELECT</span> <span class="lg-highlight-operator">*</span> <span class="lg-highlight-keyword">from</span> inventory <span class="lg-highlight-keyword">WHERE</span> status <span class="lg-highlight-operator">=</span> <!-- -->"A"</td></tr></tbody></table></code></pre>
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</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Return the Specified Fields and the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
Field Only
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</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
A projection can explicitly include several fields by setting the
<code class="leafygreen-ui-1l06pbn">
<field>
</code>
to
<code class="leafygreen-ui-1l06pbn">
1
</code>
in the projection document. The following
operation returns all documents that match the query. In the result
set, only the
<code class="leafygreen-ui-1l06pbn">
item
</code>
,
<code class="leafygreen-ui-1l06pbn">
status
</code>
and, by default, the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
fields
return in the matching documents.
</p>
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Kotlin (Coroutine)
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Motor
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Perl
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PHP
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Python
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<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1 } )","programmingLanguage":"JavaScript"}
</script>
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div>
<div aria-labelledby="_f4zvkc8a8" class="leafygreen-ui-38lglc" id="_nhlw8oqtt" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-138-menu" aria-describedby="select-138-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-139" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask1_2131_12968)">
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</path>
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</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
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</stop>
<stop offset="0.4016" stop-color="#52A044">
</stop>
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</stop>
<stop offset="0.9081" stop-color="#6ABF4B">
</stop>
</lineargradient>
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</stop>
<stop offset="0.2871" stop-color="#64B749">
</stop>
<stop offset="0.5984" stop-color="#52A044">
</stop>
<stop offset="0.8624" stop-color="#3F873F">
</stop>
</lineargradient>
<clippath id="clip0_2131_12968">
<rect fill="white" height="18.427" transform="translate(0 6)" width="30">
</rect>
</clippath>
</defs>
</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1 }","programmingLanguage":"JavaScript"}
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>), <!-- --><span class="lg-highlight-string">"}"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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</path>
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</g>
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<stop offset="1" stop-color="#3DAE2B">
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</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1at:paint1" x1="10.6159" x2="17.9826" y1="14.2811" y2="8.83932">
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Be sure to also clean up any open resources by calling the
following methods, as appropriate:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongoc.org/libbson/current/bson_destroy.html" rel="noopener noreferrer">
<span>
bson_destroy
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongoc.org/libmongoc/current/mongoc_bulk_operation_destroy.html" rel="noopener noreferrer">
<span>
mongoc_bulk_operation_destroy
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongoc.org/libmongoc/current/mongoc_collection_destroy" rel="noopener noreferrer">
<span>
mongoc_collection_destroy
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongoc.org/libmongoc/current/mongoc_cursor_destroy.html" rel="noopener noreferrer">
<span>
mongoc_cursor_destroy
<!-- -->
,
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"\nprojection := bson.D{\n\t{\"item\", 1},\n\t{\"status\", 1},\n}\n\ncursor, err := coll.Find(\n\tcontext.TODO(),\n\tbson.D{\n\t\t{\"status\", \"A\"},\n\t},\n\toptions.Find().SetProjection(projection),\n)\n","programmingLanguage":"Golang"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/FindIterable.html#projection-org.bson.conversions.Bson-" rel="noopener noreferrer">
<span>
com.mongodb.client.FindIterable.projection
</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
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</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\")).projection(include(\"item\", \"status\"));","programmingLanguage":"Java"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>));</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\")).projection(include(\"item\", \"status\"))","programmingLanguage":"Kotlin"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span> })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"cursor = db.inventory.find({\"status\": \"A\"}, {\"item\": 1, \"status\": 1})","programmingLanguage":"Python"}
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>({<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>})</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span> })</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>))</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
</path>
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</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
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<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1b9:paint2)">
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<div class="leafygreen-ui-obh8q1">
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Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
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</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
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</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation corresponds to the following SQL statement:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"SELECT _id, item, status from inventory WHERE status = \"A\"","programmingLanguage":"SQL"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light sql leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">SELECT</span> _id, item, status <span class="lg-highlight-keyword">from</span> inventory <span class="lg-highlight-keyword">WHERE</span> status <span class="lg-highlight-operator">=</span> <!-- -->"A"</td></tr></tbody></table></code></pre>
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<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Suppress
<code class="leafygreen-ui-1l06pbn">
_id
</code>
Field
<a class="headerlink leafygreen-ui-1kepx47" href="#suppress-_id-field" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="suppress-_id-field">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can remove the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field from the results by setting it to
<code class="leafygreen-ui-1l06pbn">
0
</code>
in the projection, as in the following example:
</p>
<div aria-hidden="true">
</div>
<div class="leafygreen-ui-f2qztv" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-12">
<div aria-label="Tabs to describe usage of drivers" aria-orientation="horizontal" class="leafygreen-ui-m8p1vb lg-ui-tab-list-0000" data-lgid="lg-tabs-tab_list" role="tablist">
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<div class="leafygreen-ui-1nxuzmg">
MongoDB Shell
</div>
</button>
<button aria-controls="_48yeugzj4" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_ne8rpvn5q" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Compass
</div>
</button>
<button aria-controls="_fb592p132" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_54cly7qjq" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
C
</div>
</button>
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C#
</div>
</button>
<button aria-controls="_gxjvndkk3" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_uwh24sf5f" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Go
</div>
</button>
<button aria-controls="_yxa9cd7fg" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_lkymyi02t" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Java (Async)
</div>
</button>
<button aria-controls="_qtpafze7f" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_y5wxxtj05" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Java (Sync)
</div>
</button>
<button aria-controls="_8ikh7rma0" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_1ct27wp8d" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Kotlin (Coroutine)
</div>
</button>
<button aria-controls="_7ad0fu5uz" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_vbbh9hq2v" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Motor
</div>
</button>
<button aria-controls="_ln5yg21y8" aria-selected="true" class="leafygreen-ui-1l773z1" data-text="" id="_rqiydzws4" name="" role="tab" tabindex="0">
<div class="leafygreen-ui-1nxuzmg">
Node.js
</div>
</button>
<button aria-controls="_g3naut5ch" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_tpqbevfos" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Perl
</div>
</button>
<button aria-controls="_9zhkepjux" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_1fm8h12yy" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
PHP
</div>
</button>
<button aria-controls="_gilqssase" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_i4h97tzpn" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Python
</div>
</button>
<button aria-controls="_pdx9tbj11" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_obt4mhv6l" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Ruby
</div>
</button>
<button aria-controls="_347k6t8fl" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_b27g5b3mb" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Scala
</div>
</button>
</div>
<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
</div>
</div>
<div class="lg-ui-tab-panels-0000" data-lgid="lg-tabs-tab_panels">
<div>
<div aria-labelledby="_c40a6343k" class="leafygreen-ui-38lglc" id="_2e083v5h2" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, _id: 0 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">0</span> } )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-184-menu" aria-describedby="select-184-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-185" type="button" value="Node.js">
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</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
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<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-187-menu" aria-describedby="select-187-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-188" type="button" value="Node.js">
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</lineargradient>
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<rect fill="white" height="18.427" transform="translate(0 6)" width="30">
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</defs>
</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, _id: 0 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">0</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-190-menu" aria-describedby="select-190-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-191" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask1_2131_12968)">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"_id"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">0</span>), <!-- --><span class="lg-highlight-string">"}"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Exclude</span>(<span class="lg-highlight-string">"_id"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"_id"</span>, <span class="lg-highlight-number">0</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findPublisher = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), excludeId()));","programmingLanguage":"Java"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">excludeId</span>()));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/FindIterable.html#projection-org.bson.conversions.Bson-" rel="noopener noreferrer">
<span>
com.mongodb.client.FindIterable.projection
</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
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class to create the
projection documents.
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<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">excludeId</span>()));</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">excludeId</span>()))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">0</span> })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'_id'</span> => <span class="lg-highlight-number">0</span>]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"cursor = db.inventory.find({\"status\": \"A\"}, {\"item\": 1, \"status\": 1, \"_id\": 0})","programmingLanguage":"Python"}
</script>
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<div class="leafygreen-ui-196mwvg">
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>({<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"_id"</span>: <span class="lg-highlight-number">0</span>})</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"client[:inventory].find({ status: 'A' },\n projection: { item: 1, status: 1, _id: 0 })","programmingLanguage":"Ruby"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">0</span> })</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">excludeId</span>()))</td></tr></tbody></table></code></pre>
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<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1bp:paint2)">
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Node.js
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</div>
</div>
</div>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation corresponds to the following SQL statement:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"SELECT item, status from inventory WHERE status = \"A\"","programmingLanguage":"SQL"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light sql leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">SELECT</span> item, status <span class="lg-highlight-keyword">from</span> inventory <span class="lg-highlight-keyword">WHERE</span> status <span class="lg-highlight-operator">=</span> <!-- -->"A"</td></tr></tbody></table></code></pre>
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</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
With the exception of the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field, you cannot combine inclusion
and exclusion statements in projection documents.
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Return All But the Excluded Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#return-all-but-the-excluded-fields" title="Permalink to this heading">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="return-all-but-the-excluded-fields">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Instead of listing the fields to return in the matching document, you
can use a projection to exclude specific fields. The following example
which returns all fields except for the
<code class="leafygreen-ui-1l06pbn">
status
</code>
and the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
fields in the matching documents:
</p>
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MongoDB Shell
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Compass
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Java (Sync)
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Kotlin (Coroutine)
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Motor
</div>
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Node.js
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Perl
</div>
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PHP
</div>
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Python
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Ruby
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Scala
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<div>
<div aria-labelledby="_fab8yv128" class="leafygreen-ui-38lglc" id="_7ehvtqtoy" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { status: 0, instock: 0 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-attr">instock</span>: <span class="lg-highlight-number">0</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-233-menu" aria-describedby="select-233-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-234" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div>
<div aria-labelledby="_61htzcm6m" class="leafygreen-ui-38lglc" id="_ssyd3yi1t" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-236-menu" aria-describedby="select-236-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-237" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
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</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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<g mask="url(#mask1_2131_12968)">
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</lineargradient>
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</stop>
<stop offset="0.4016" stop-color="#52A044">
</stop>
<stop offset="0.7129" stop-color="#64B749">
</stop>
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</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1br:paint2" x1="7.69907" x2="14.4172" y1="13.8874" y2="13.8874">
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</stop>
<stop offset="0.2871" stop-color="#64B749">
</stop>
<stop offset="0.5984" stop-color="#52A044">
</stop>
<stop offset="0.8624" stop-color="#3F873F">
</stop>
</lineargradient>
<clippath id="clip0_2131_12968">
<rect fill="white" height="18.427" transform="translate(0 6)" width="30">
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</clippath>
</defs>
</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: 0, instock: 0 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-attr">instock</span>: <span class="lg-highlight-number">0</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-239-menu" aria-describedby="select-239-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-240" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask1_2131_12968)">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">0</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">0</span>), <!-- --><span class="lg-highlight-string">"}"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Exclude</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Exclude</span>(<span class="lg-highlight-string">"instock"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">0</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-number">0</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">exclude</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/FindIterable.html#projection-org.bson.conversions.Bson-" rel="noopener noreferrer">
<span>
com.mongodb.client.FindIterable.projection
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
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<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\")).projection(exclude(\"item\", \"status\"));","programmingLanguage":"Java"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">exclude</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>));</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\")).projection(exclude(\"item\", \"status\"))","programmingLanguage":"Kotlin"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">exclude</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>))</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"cursor = db.inventory.find({\"status\": \"A\"}, {\"status\": 0, \"instock\": 0})","programmingLanguage":"Python"}
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>({<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"instock"</span>: <span class="lg-highlight-number">0</span>})</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-attr">instock</span>: <span class="lg-highlight-number">0</span> })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-attr">instock</span>: <span class="lg-highlight-number">0</span> })</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findObservable = collection.find(equal(\"status\", \"A\")).projection(exclude(\"item\", \"status\"))","programmingLanguage":"Scala"}
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">exclude</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>))</td></tr></tbody></table></code></pre>
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</path>
<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
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<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
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<path clip-rule="evenodd" d="M26.7521 13.1654C26.7724 13.1519 26.7996 13.1519 26.8199 13.1654L27.3692 13.4836C27.3895 13.4971 27.4031 13.5174 27.4031 13.5445V14.1809C27.4031 14.2079 27.3895 14.2282 27.3692 14.2418L26.8199 14.5599C26.7996 14.5735 26.7724 14.5735 26.7521 14.5599L26.2028 14.2418C26.1825 14.2282 26.1689 14.2079 26.1689 14.1809V13.5445C26.1689 13.5174 26.1825 13.4971 26.2028 13.4836L26.7521 13.1654Z" fill="#5FA04E" fill-rule="evenodd">
</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1c9:paint2)">
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</g>
</g>
</g>
<defs>
<lineargradient gradientunits="userSpaceOnUse" id=":r1c9:paint0" x1="12.2396" x2="9.61385" y1="11.4775" y2="16.8331">
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<stop offset="0.3296" stop-color="#3F8B3D">
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</lineargradient>
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</lineargradient>
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
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</button>
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</div>
</div>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
With the exception of the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field, you cannot combine inclusion
and exclusion statements in projection documents.
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Return Specific Fields in Embedded Documents
<a class="headerlink leafygreen-ui-1kepx47" href="#return-specific-fields-in-embedded-documents" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="return-specific-fields-in-embedded-documents">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can return specific fields in an embedded document. Use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/document/#std-label-document-dot-notation">
dot notation
</a>
to refer to the embedded
field and set to
<code class="leafygreen-ui-1l06pbn">
1
</code>
in the projection document.
</p>
<p class="leafygreen-ui-1kp3ins">
The following example returns:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field (returned by default),
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
item
</code>
field,
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
status
</code>
field,
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
uom
</code>
field in the
<code class="leafygreen-ui-1l06pbn">
size
</code>
document.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
uom
</code>
field remains embedded in the
<code class="leafygreen-ui-1l06pbn">
size
</code>
document.
</p>
<div aria-hidden="true">
</div>
<div class="leafygreen-ui-f2qztv" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-16">
<div aria-label="Tabs to describe usage of drivers" aria-orientation="horizontal" class="leafygreen-ui-m8p1vb lg-ui-tab-list-0000" data-lgid="lg-tabs-tab_list" role="tablist">
<button aria-controls="_al5r3rq93" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_4yhqsgb11" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
MongoDB Shell
</div>
</button>
<button aria-controls="_cp74ni91v" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_jaejy3bsw" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Compass
</div>
</button>
<button aria-controls="_4d6ldbl0a" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_v9f3jqium" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
C
</div>
</button>
<button aria-controls="_z7ob59k2p" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_71f5if9ty" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
C#
</div>
</button>
<button aria-controls="_i0r96osqa" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_18j9vkv6f" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Go
</div>
</button>
<button aria-controls="_m51tuoqmf" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_9drufdnsx" name="" role="tab" tabindex="-1">
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Java (Async)
</div>
</button>
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<div class="leafygreen-ui-1nxuzmg">
Java (Sync)
</div>
</button>
<button aria-controls="_plpiigzzx" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_lhsr7ytj9" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Kotlin (Coroutine)
</div>
</button>
<button aria-controls="_dyw29h2t7" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_7x3fag0g0" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Motor
</div>
</button>
<button aria-controls="_i9nv6v8qe" aria-selected="true" class="leafygreen-ui-1l773z1" data-text="" id="_pak5embgo" name="" role="tab" tabindex="0">
<div class="leafygreen-ui-1nxuzmg">
Node.js
</div>
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Perl
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PHP
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Python
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Ruby
</div>
</button>
<button aria-controls="_uzjabed8z" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_c31xg9f1f" name="" role="tab" tabindex="-1">
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Scala
</div>
</button>
</div>
<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
</div>
</div>
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<div>
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<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find(\n { status: \"A\" },\n { item: 1, status: 1, \"size.uom\": 1 }\n)","programmingLanguage":"JavaScript"}
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<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"size.uom"</span>: <span class="lg-highlight-number">1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
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<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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<div aria-labelledby="_33p0dd1ge" class="leafygreen-ui-38lglc" id="_4n40lelyk" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
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</stop>
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</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, \"size.uom\": 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"size.uom"</span>: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-287-menu" aria-describedby="select-287-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-288" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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</path>
</mask>
<g mask="url(#mask1_2131_12968)">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"size.uom"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>), <!-- --><span class="lg-highlight-string">"}"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"size.uom"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"size.uom"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"size.uom"</span>));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/FindIterable.html#projection-org.bson.conversions.Bson-" rel="noopener noreferrer">
<span>
com.mongodb.client.FindIterable.projection
</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
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com.mongodb.client.model.Projections
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<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
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</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\")).projection(include(\"item\", \"status\", \"size.uom\"));","programmingLanguage":"Java"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"size.uom"</span>));</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\")).projection(include(\"item\", \"status\", \"size.uom\"))","programmingLanguage":"Kotlin"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"size.uom"</span>))</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"cursor = db.inventory.find({\"status\": \"A\"}, {\"item\": 1, \"status\": 1, \"size.uom\": 1})","programmingLanguage":"Python"}
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>({<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"size.uom"</span>: <span class="lg-highlight-number">1</span>})</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'size.uom'</span>: <span class="lg-highlight-number">1</span> })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><span class="lg-highlight-function"> =></span> <!-- --><!-- --><span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"size.uom"</span> => <span class="lg-highlight-number">1</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{ <span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'size.uom'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span> })</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"size.uom"</span>))</td></tr></tbody></table></code></pre>
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<button aria-controls="select-326-menu" aria-describedby="select-326-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-327" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
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<path d="M19.5706 18.9597C19.5706 19.244 19.3333 19.481 19.0485 19.481C18.7636 19.481 18.5264 19.2507 18.5264 18.9597C18.5264 18.6618 18.7704 18.4385 19.0485 18.4385C19.3265 18.4385 19.5706 18.6686 19.5706 18.9597ZM18.6077 18.9597C18.6077 19.2034 18.8044 19.3997 19.0417 19.3997C19.2859 19.3997 19.4825 19.1967 19.4825 18.9597C19.4825 18.716 19.2859 18.5264 19.0417 18.5264C18.8111 18.5264 18.6077 18.716 18.6077 18.9597ZM18.8519 18.6686H19.0553C19.1231 18.6686 19.2587 18.6686 19.2587 18.8243C19.2587 18.9326 19.1909 18.9529 19.1502 18.9664C19.2316 18.9732 19.2384 19.0274 19.2451 19.1019C19.2519 19.1493 19.2587 19.2304 19.2722 19.2575H19.1502C19.1502 19.2304 19.1298 19.0815 19.1298 19.0748C19.1231 19.0409 19.1095 19.0274 19.0688 19.0274H18.9672V19.2643H18.8519V18.6686ZM18.9603 18.9258H19.0485C19.1231 18.9258 19.1366 18.8716 19.1366 18.8446C19.1366 18.7634 19.0824 18.7634 19.0485 18.7634H18.9535V18.9258H18.9603Z" fill="black">
</path>
<path clip-rule="evenodd" d="M6.43536 12.1766C6.43536 12.0548 6.36754 11.9397 6.25904 11.8788L3.39059 10.2202C3.34313 10.1932 3.28887 10.1796 3.23463 10.1729C3.22785 10.1729 3.20751 10.1729 3.20751 10.1729C3.15325 10.1729 3.09901 10.1932 3.05154 10.2202L0.176311 11.872C0.067812 11.9329 0 12.048 0 12.1766L0.00678119 16.6174C0.00678119 16.6783 0.0406871 16.7393 0.0949364 16.7663C0.149187 16.8002 0.216998 16.8002 0.264466 16.7663L1.97332 15.7915C2.08183 15.7306 2.14964 15.6155 2.14964 15.4936V13.4154C2.14964 13.2936 2.21745 13.1785 2.32595 13.1176L3.05154 12.6979C3.10579 12.664 3.16682 12.6505 3.22785 12.6505C3.28887 12.6505 3.34991 12.664 3.39738 12.6979L4.12297 13.1176C4.23147 13.1785 4.29927 13.2936 4.29927 13.4154V15.4936C4.29927 15.6155 4.36709 15.7306 4.47559 15.7915L6.17089 16.7663C6.22513 16.8002 6.29295 16.8002 6.3472 16.7663C6.40144 16.7393 6.43536 16.6783 6.43536 16.6174V12.1766Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M26.7521 13.1654C26.7724 13.1519 26.7996 13.1519 26.8199 13.1654L27.3692 13.4836C27.3895 13.4971 27.4031 13.5174 27.4031 13.5445V14.1809C27.4031 14.2079 27.3895 14.2282 27.3692 14.2418L26.8199 14.5599C26.7996 14.5735 26.7724 14.5735 26.7521 14.5599L26.2028 14.2418C26.1825 14.2282 26.1689 14.2079 26.1689 14.1809V13.5445C26.1689 13.5174 26.1825 13.4971 26.2028 13.4836L26.7521 13.1654Z" fill="#5FA04E" fill-rule="evenodd">
</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1cp:paint2)">
</path>
</g>
</g>
</g>
<defs>
<lineargradient gradientunits="userSpaceOnUse" id=":r1cp:paint0" x1="12.2396" x2="9.61385" y1="11.4775" y2="16.8331">
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</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
You can also specify embedded fields using the nested form. For example,
<code class="leafygreen-ui-1l06pbn">
{ item: 1, status: 1, size: { uom: 1 } }
</code>
.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Suppress Specific Fields in Embedded Documents
<a class="headerlink leafygreen-ui-1kepx47" href="#suppress-specific-fields-in-embedded-documents" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="suppress-specific-fields-in-embedded-documents">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can suppress specific fields in an embedded document. Use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/document/#std-label-document-dot-notation">
dot notation
</a>
to refer to the embedded
field in the projection document and set to
<code class="leafygreen-ui-1l06pbn">
0
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
The following example specifies a projection to exclude the
<code class="leafygreen-ui-1l06pbn">
uom
</code>
field inside the
<code class="leafygreen-ui-1l06pbn">
size
</code>
document. All other fields are returned in
the matching documents:
</p>
<div aria-hidden="true">
</div>
<div class="leafygreen-ui-f2qztv" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-18">
<div aria-label="Tabs to describe usage of drivers" aria-orientation="horizontal" class="leafygreen-ui-m8p1vb lg-ui-tab-list-0000" data-lgid="lg-tabs-tab_list" role="tablist">
<button aria-controls="_edo30b8sb" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_ii6bjcjcm" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
MongoDB Shell
</div>
</button>
<button aria-controls="_5dnag2wem" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_n2naytmb2" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Compass
</div>
</button>
<button aria-controls="_topg9vhmv" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_tn765aian" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
C
</div>
</button>
<button aria-controls="_gg5zaccjs" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_o0rg7wwhy" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
C#
</div>
</button>
<button aria-controls="_og6esex7s" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_g5rreeckc" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Go
</div>
</button>
<button aria-controls="_qa9futtx1" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_wl2ccog04" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Java (Async)
</div>
</button>
<button aria-controls="_tk65ol413" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_jnk9w0ata" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Java (Sync)
</div>
</button>
<button aria-controls="_p0ofimcjh" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_cozefej60" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Kotlin (Coroutine)
</div>
</button>
<button aria-controls="_7wmqq4zvd" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_eadq0y3cr" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Motor
</div>
</button>
<button aria-controls="_bsabynr9v" aria-selected="true" class="leafygreen-ui-1l773z1" data-text="" id="_4v11gu1ak" name="" role="tab" tabindex="0">
<div class="leafygreen-ui-1nxuzmg">
Node.js
</div>
</button>
<button aria-controls="_t5dxnba0j" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_w4mjln119" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Perl
</div>
</button>
<button aria-controls="_95oww5s8p" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_wjlp6vu7z" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
PHP
</div>
</button>
<button aria-controls="_btuq1w5qx" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_lq04lh9gr" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Python
</div>
</button>
<button aria-controls="_j3381wljd" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_muc2lsqxq" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Ruby
</div>
</button>
<button aria-controls="_7g5nycdwf" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_5pinfa7eu" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Scala
</div>
</button>
</div>
<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
</div>
</div>
<div class="lg-ui-tab-panels-0000" data-lgid="lg-tabs-tab_panels">
<div>
<div aria-labelledby="_66l9zfco0" class="leafygreen-ui-38lglc" id="_mo1ggp0cy" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find(\n { status: \"A\" },\n { \"size.uom\": 0 }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"size.uom"</span>: <span class="lg-highlight-number">0</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-329-menu" aria-describedby="select-329-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-330" type="button" value="Node.js">
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
</div>
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</div>
</div>
</div>
<div>
<div aria-labelledby="_fsl1tm80i" class="leafygreen-ui-38lglc" id="_tpbpj7v2l" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-332-menu" aria-describedby="select-332-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-333" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
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</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"size.uom\": 0 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"size.uom"</span>: <span class="lg-highlight-number">0</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-335-menu" aria-describedby="select-335-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-336" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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</mask>
<g mask="url(#mask1_2131_12968)">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"size.uom"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> <!-- -->(<span class="lg-highlight-number">0</span>), <span class="lg-highlight-string">"}"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Exclude</span>(<span class="lg-highlight-string">"size.uom"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"size.uom"</span>, <span class="lg-highlight-number">0</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findPublisher = collection.find(eq(\"status\", \"A\")).projection(exclude(\"size.uom\"));","programmingLanguage":"Java"}
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">exclude</span>(<span class="lg-highlight-string">"size.uom"</span>));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
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</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\")).projection(exclude(\"size.uom\"));","programmingLanguage":"Java"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">exclude</span>(<span class="lg-highlight-string">"size.uom"</span>));</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\")).projection(exclude(\"size.uom\"))","programmingLanguage":"Kotlin"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">exclude</span>(<span class="lg-highlight-string">"size.uom"</span>))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>({<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"size.uom"</span>: <span class="lg-highlight-number">0</span>})</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-string">'size.uom'</span>: <span class="lg-highlight-number">0</span> })<!-- -->;</td></tr></tbody></table></code></pre>
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<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"cursor = db.inventory.find({\"status\": \"A\"}, {\"size.uom\": 0})","programmingLanguage":"Python"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>({<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"size.uom"</span>: <span class="lg-highlight-number">0</span>})</td></tr></tbody></table></code></pre>
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<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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<div>
<div aria-labelledby="_dg5j4qj5m" class="leafygreen-ui-38lglc" id="_uw7iyignv" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"client[:inventory].find({ status: 'A' },\n projection: { 'size.uom' => 0 })","programmingLanguage":"Ruby"}
</script>
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<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{ <span class="lg-highlight-string">'size.uom'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">0</span> })</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
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<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
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</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1d9:paint2)">
</path>
</g>
</g>
</g>
<defs>
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</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
You can also specify embedded fields using the nested form. For example,
<code class="leafygreen-ui-1l06pbn">
{ size: { uom: 0 } }
</code>
.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Projection on Embedded Documents in an Array
<a class="headerlink leafygreen-ui-1kepx47" href="#projection-on-embedded-documents-in-an-array" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="projection-on-embedded-documents-in-an-array">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/document/#std-label-document-dot-notation">
dot notation
</a>
to project specific
fields inside documents embedded in an array.
</p>
<p class="leafygreen-ui-1kp3ins">
The following example specifies a projection to return:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field (returned by default),
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
item
</code>
field,
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
status
</code>
field,
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
qty
</code>
field in the documents embedded in the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
array.
</p>
</li>
</ul>
<div aria-hidden="true">
</div>
<div class="leafygreen-ui-f2qztv" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-20">
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<div class="leafygreen-ui-1nxuzmg">
MongoDB Shell
</div>
</button>
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<div class="leafygreen-ui-1nxuzmg">
Compass
</div>
</button>
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C
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C#
</div>
</button>
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Go
</div>
</button>
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Java (Async)
</div>
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Java (Sync)
</div>
</button>
<button aria-controls="_hoo6anej6" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_qm5g38p0i" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Kotlin (Coroutine)
</div>
</button>
<button aria-controls="_zg9wfbq3j" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_5f9xaf1dt" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Motor
</div>
</button>
<button aria-controls="_w8v5jquj9" aria-selected="true" class="leafygreen-ui-1l773z1" data-text="" id="_6gxkfc398" name="" role="tab" tabindex="0">
<div class="leafygreen-ui-1nxuzmg">
Node.js
</div>
</button>
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<div class="leafygreen-ui-1nxuzmg">
Perl
</div>
</button>
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PHP
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</button>
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Python
</div>
</button>
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<div class="leafygreen-ui-1nxuzmg">
Ruby
</div>
</button>
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<div class="leafygreen-ui-1nxuzmg">
Scala
</div>
</button>
</div>
<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
</div>
</div>
<div class="lg-ui-tab-panels-0000" data-lgid="lg-tabs-tab_panels">
<div>
<div aria-labelledby="_7nz6iaq4r" class="leafygreen-ui-38lglc" id="_8em4hwwbi" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, \"instock.qty\": 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock.qty"</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-377-menu" aria-describedby="select-377-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-378" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
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</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div>
<div aria-labelledby="_bb6duhhfp" class="leafygreen-ui-38lglc" id="_eptjjtsqg" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-380-menu" aria-describedby="select-380-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-381" type="button" value="Node.js">
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</stop>
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</lineargradient>
<clippath id="clip0_2131_12968">
<rect fill="white" height="18.427" transform="translate(0 6)" width="30">
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</clippath>
</defs>
</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, \"instock.qty\": 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock.qty"</span>: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-383-menu" aria-describedby="select-383-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-384" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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</path>
</mask>
<g mask="url(#mask1_2131_12968)">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock.qty"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>), <!-- --><span class="lg-highlight-string">"}"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"instock.qty"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock.qty"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"instock.qty"</span>));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/FindIterable.html#projection-org.bson.conversions.Bson-" rel="noopener noreferrer">
<span>
com.mongodb.client.FindIterable.projection
</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
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com.mongodb.client.model.Projections
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<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
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</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\")).projection(include(\"item\", \"status\", \"instock.qty\"));","programmingLanguage":"Java"}
</script>
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<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"instock.qty"</span>));</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\")).projection(include(\"item\", \"status\", \"instock.qty\"))","programmingLanguage":"Kotlin"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"instock.qty"</span>))</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"cursor = db.inventory.find({\"status\": \"A\"}, {\"item\": 1, \"status\": 1, \"instock.qty\": 1})","programmingLanguage":"Python"}
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>({<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock.qty"</span>: <span class="lg-highlight-number">1</span>})</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock.qty'</span>: <span class="lg-highlight-number">1</span> })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <!-- --><span class="lg-highlight-string">"instock.qty"</span> =<!-- -->> <span class="lg-highlight-number">1</span> } } );</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{<span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock.qty'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span> })</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findObservable = collection.find(equal(\"status\", \"A\")).projection(include(\"item\", \"status\", \"instock.qty\"))","programmingLanguage":"Scala"}
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>)).<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"instock.qty"</span>))</td></tr></tbody></table></code></pre>
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Project Specific Array Elements in the Returned Array
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For fields that contain arrays, MongoDB provides the following
projection operators for manipulating arrays:
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following example uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
projection operator
to return the last element in the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
array:
</p>
<div aria-hidden="true">
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<div>
<div aria-labelledby="_t12cmp3eq" class="leafygreen-ui-38lglc" id="_2duw40re4" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, instock: { $slice: -1 } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } } )</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div>
<div aria-labelledby="_g0mk8wc63" class="leafygreen-ui-38lglc" id="_glq58k5ey" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-428-menu" aria-describedby="select-428-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-429" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask1_2131_12968)">
<path d="M14.8241 24.3823C14.7224 24.3823 14.6274 24.3552 14.5393 24.3078L13.6374 23.7731C13.5018 23.6986 13.5696 23.6715 13.6103 23.658C13.7934 23.597 13.8273 23.5835 14.0172 23.4751C14.0375 23.4616 14.0646 23.4684 14.085 23.4819L14.7767 23.8949C14.8038 23.9084 14.8377 23.9084 14.858 23.8949L17.5637 22.3311C17.5909 22.3176 17.6044 22.2905 17.6044 22.2567V19.136C17.6044 19.1021 17.5909 19.075 17.5637 19.0615L14.858 17.5045C14.8309 17.4909 14.797 17.4909 14.7767 17.5045L12.071 19.0615C12.0439 19.075 12.0302 19.1089 12.0302 19.136V22.2567C12.0302 22.2838 12.0439 22.3176 12.071 22.3311L12.8101 22.7576C13.2102 22.9607 13.4611 22.7237 13.4611 22.4868V19.4067C13.4611 19.3661 13.495 19.3255 13.5425 19.3255H13.8884C13.929 19.3255 13.9697 19.3593 13.9697 19.4067V22.4868C13.9697 23.0217 13.6781 23.333 13.1695 23.333C13.0136 23.333 12.8915 23.333 12.5457 23.1638L11.8336 22.7576C11.6574 22.6561 11.5488 22.4665 11.5488 22.2635V19.1427C11.5488 18.9396 11.6574 18.7501 11.8336 18.6485L14.5393 17.0848C14.7089 16.99 14.9394 16.99 15.109 17.0848L17.8146 18.6485C17.9909 18.7501 18.0995 18.9396 18.0995 19.1427V22.2635C18.0995 22.4665 17.9909 22.6561 17.8146 22.7576L15.109 24.3214C15.0276 24.3552 14.9259 24.3823 14.8241 24.3823Z" fill="black">
</path>
<path d="M15.6643 22.2362C14.4775 22.2362 14.2334 21.6946 14.2334 21.2343C14.2334 21.1936 14.2673 21.153 14.3147 21.153H14.6674C14.7081 21.153 14.742 21.1801 14.742 21.2207C14.7963 21.5795 14.9522 21.7555 15.671 21.7555C16.2407 21.7555 16.4847 21.6269 16.4847 21.3223C16.4847 21.1462 16.4169 21.0177 15.5286 20.9297C14.7895 20.8552 14.3284 20.6928 14.3284 20.1038C14.3284 19.5555 14.7895 19.2305 15.5625 19.2305C16.4305 19.2305 16.8577 19.5284 16.912 20.1782C16.912 20.1986 16.9052 20.2189 16.8916 20.2392C16.8781 20.2527 16.8577 20.2663 16.8374 20.2663H16.4779C16.4441 20.2663 16.4101 20.2392 16.4034 20.2053C16.322 19.833 16.1118 19.7111 15.5557 19.7111C14.9319 19.7111 14.8573 19.9278 14.8573 20.0902C14.8573 20.2866 14.9454 20.3475 15.7863 20.4558C16.6204 20.5641 17.0137 20.7198 17.0137 21.302C17.0137 21.8977 16.5187 22.2362 15.6643 22.2362Z" fill="black">
</path>
<path d="M19.5706 18.9597C19.5706 19.244 19.3333 19.481 19.0485 19.481C18.7636 19.481 18.5264 19.2507 18.5264 18.9597C18.5264 18.6618 18.7704 18.4385 19.0485 18.4385C19.3265 18.4385 19.5706 18.6686 19.5706 18.9597ZM18.6077 18.9597C18.6077 19.2034 18.8044 19.3997 19.0417 19.3997C19.2859 19.3997 19.4825 19.1967 19.4825 18.9597C19.4825 18.716 19.2859 18.5264 19.0417 18.5264C18.8111 18.5264 18.6077 18.716 18.6077 18.9597ZM18.8519 18.6686H19.0553C19.1231 18.6686 19.2587 18.6686 19.2587 18.8243C19.2587 18.9326 19.1909 18.9529 19.1502 18.9664C19.2316 18.9732 19.2384 19.0274 19.2451 19.1019C19.2519 19.1493 19.2587 19.2304 19.2722 19.2575H19.1502C19.1502 19.2304 19.1298 19.0815 19.1298 19.0748C19.1231 19.0409 19.1095 19.0274 19.0688 19.0274H18.9672V19.2643H18.8519V18.6686ZM18.9603 18.9258H19.0485C19.1231 18.9258 19.1366 18.8716 19.1366 18.8446C19.1366 18.7634 19.0824 18.7634 19.0485 18.7634H18.9535V18.9258H18.9603Z" fill="black">
</path>
<path clip-rule="evenodd" d="M6.43536 12.1766C6.43536 12.0548 6.36754 11.9397 6.25904 11.8788L3.39059 10.2202C3.34313 10.1932 3.28887 10.1796 3.23463 10.1729C3.22785 10.1729 3.20751 10.1729 3.20751 10.1729C3.15325 10.1729 3.09901 10.1932 3.05154 10.2202L0.176311 11.872C0.067812 11.9329 0 12.048 0 12.1766L0.00678119 16.6174C0.00678119 16.6783 0.0406871 16.7393 0.0949364 16.7663C0.149187 16.8002 0.216998 16.8002 0.264466 16.7663L1.97332 15.7915C2.08183 15.7306 2.14964 15.6155 2.14964 15.4936V13.4154C2.14964 13.2936 2.21745 13.1785 2.32595 13.1176L3.05154 12.6979C3.10579 12.664 3.16682 12.6505 3.22785 12.6505C3.28887 12.6505 3.34991 12.664 3.39738 12.6979L4.12297 13.1176C4.23147 13.1785 4.29927 13.2936 4.29927 13.4154V15.4936C4.29927 15.6155 4.36709 15.7306 4.47559 15.7915L6.17089 16.7663C6.22513 16.8002 6.29295 16.8002 6.3472 16.7663C6.40144 16.7393 6.43536 16.6783 6.43536 16.6174V12.1766Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M26.7521 13.1654C26.7724 13.1519 26.7996 13.1519 26.8199 13.1654L27.3692 13.4836C27.3895 13.4971 27.4031 13.5174 27.4031 13.5445V14.1809C27.4031 14.2079 27.3895 14.2282 27.3692 14.2418L26.8199 14.5599C26.7996 14.5735 26.7724 14.5735 26.7521 14.5599L26.2028 14.2418C26.1825 14.2282 26.1689 14.2079 26.1689 14.1809V13.5445C26.1689 13.5174 26.1825 13.4971 26.2028 13.4836L26.7521 13.1654Z" fill="#5FA04E" fill-rule="evenodd">
</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1dr:paint2)">
</path>
</g>
</g>
</g>
<defs>
<lineargradient gradientunits="userSpaceOnUse" id=":r1dr:paint0" x1="12.2396" x2="9.61385" y1="11.4775" y2="16.8331">
<stop stop-color="#3F873F">
</stop>
<stop offset="0.3296" stop-color="#3F8B3D">
</stop>
<stop offset="0.6367" stop-color="#3E9638">
</stop>
<stop offset="0.9341" stop-color="#3DA92E">
</stop>
<stop offset="1" stop-color="#3DAE2B">
</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1dr:paint1" x1="10.6159" x2="17.9826" y1="14.2811" y2="8.83932">
<stop offset="0.1376" stop-color="#3F873F">
</stop>
<stop offset="0.4016" stop-color="#52A044">
</stop>
<stop offset="0.7129" stop-color="#64B749">
</stop>
<stop offset="0.9081" stop-color="#6ABF4B">
</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1dr:paint2" x1="7.69907" x2="14.4172" y1="13.8874" y2="13.8874">
<stop offset="0.0919165" stop-color="#6ABF4B">
</stop>
<stop offset="0.2871" stop-color="#64B749">
</stop>
<stop offset="0.5984" stop-color="#52A044">
</stop>
<stop offset="0.8624" stop-color="#3F873F">
</stop>
</lineargradient>
<clippath id="clip0_2131_12968">
<rect fill="white" height="18.427" transform="translate(0 6)" width="30">
</rect>
</clippath>
</defs>
</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, instock: { $slice: -1 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-431-menu" aria-describedby="select-431-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-432" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"$slice"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- -->-<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"}"</span>, <span class="lg-highlight-string">"}"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"$slice"</span>, -<span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/FindIterable.html#projection-org.bson.conversions.Bson-" rel="noopener noreferrer">
<span>
com.mongodb.client.FindIterable.projection
</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
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<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
</script>
<div class="css-16lmvu9">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-find-flow/projection.html" rel="noopener noreferrer">
<span>
FindFlow.projection()
</span>
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</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find()
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-core/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
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class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Kotlin"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->{ <!-- --><span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock'</span> => [<span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span>]]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock"</span>: {<span class="lg-highlight-string">"$slice"</span>: -<span class="lg-highlight-number">1</span>}}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{<span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> <!-- -->=<!-- -->> <!-- -->{ <span class="lg-highlight-string">'$slice'</span> <!-- -->=<!-- -->> <!-- -->-<span class="lg-highlight-number">1</span> } })</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findObservable = collection.find(equal(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Scala"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
</a>
are the
<em>
only
</em>
operators that you can use to project specific elements
to include in the returned array. For instance, you
<em>
cannot
</em>
project specific array elements using the array index; e.g.
<code class="leafygreen-ui-1l06pbn">
{ "instock.0": 1 }
</code>
projection does
<em>
not
</em>
project the array
with the first element.
</p>
</div>
</div>
</div>
<div>
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<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
For fields that contain arrays, MongoDB provides the following
projection operators for manipulating arrays:
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following example uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
projection operator
to return the last element in the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
array:
</p>
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<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, instock: { $slice: -1 } } )","programmingLanguage":"JavaScript"}
</script>
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<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } } )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
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</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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<div>
<div aria-labelledby="_sn7tcd9mt" class="leafygreen-ui-38lglc" id="_wpetuiqo0" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-476-menu" aria-describedby="select-476-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-477" type="button" value="Node.js">
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, instock: { $slice: -1 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-479-menu" aria-describedby="select-479-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-480" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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</mask>
<g mask="url(#mask1_2131_12968)">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"$slice"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- -->-<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"}"</span>, <span class="lg-highlight-string">"}"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"$slice"</span>, -<span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findPublisher = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
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</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-494-menu" aria-describedby="select-494-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-495" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
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<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
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<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
</path>
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</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1eh:paint2)">
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</svg>
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Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
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<p class="leafygreen-ui-1kp3ins">
To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-find-flow/projection.html" rel="noopener noreferrer">
<span>
FindFlow.projection()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
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</path>
</svg>
</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find()
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-core/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
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</path>
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</path>
</svg>
</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Kotlin"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock"</span>: {<span class="lg-highlight-string">"$slice"</span>: -<span class="lg-highlight-number">1</span>}}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->{ <!-- --><span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock'</span> => [<span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span>]]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{<span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> <!-- -->=<!-- -->> <!-- -->{ <span class="lg-highlight-string">'$slice'</span> <!-- -->=<!-- -->> <!-- -->-<span class="lg-highlight-number">1</span> } })</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findObservable = collection.find(equal(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Scala"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<p class="leafygreen-ui-1kp3ins">
For fields that contain arrays, MongoDB provides the following
projection operators for manipulating arrays:
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following example uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
projection operator
to return the last element in the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
array:
</p>
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<div aria-labelledby="_h7m0hizlp" class="leafygreen-ui-38lglc" id="_uf2av9ot2" role="tabpanel">
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<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, instock: { $slice: -1 } } )","programmingLanguage":"JavaScript"}
</script>
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } } )</td></tr></tbody></table></code></pre>
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<div aria-labelledby="_1aqg04o1e" class="leafygreen-ui-38lglc" id="_0hmkghi3s" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-524-menu" aria-describedby="select-524-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-525" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask1_2131_12968)">
<path d="M14.8241 24.3823C14.7224 24.3823 14.6274 24.3552 14.5393 24.3078L13.6374 23.7731C13.5018 23.6986 13.5696 23.6715 13.6103 23.658C13.7934 23.597 13.8273 23.5835 14.0172 23.4751C14.0375 23.4616 14.0646 23.4684 14.085 23.4819L14.7767 23.8949C14.8038 23.9084 14.8377 23.9084 14.858 23.8949L17.5637 22.3311C17.5909 22.3176 17.6044 22.2905 17.6044 22.2567V19.136C17.6044 19.1021 17.5909 19.075 17.5637 19.0615L14.858 17.5045C14.8309 17.4909 14.797 17.4909 14.7767 17.5045L12.071 19.0615C12.0439 19.075 12.0302 19.1089 12.0302 19.136V22.2567C12.0302 22.2838 12.0439 22.3176 12.071 22.3311L12.8101 22.7576C13.2102 22.9607 13.4611 22.7237 13.4611 22.4868V19.4067C13.4611 19.3661 13.495 19.3255 13.5425 19.3255H13.8884C13.929 19.3255 13.9697 19.3593 13.9697 19.4067V22.4868C13.9697 23.0217 13.6781 23.333 13.1695 23.333C13.0136 23.333 12.8915 23.333 12.5457 23.1638L11.8336 22.7576C11.6574 22.6561 11.5488 22.4665 11.5488 22.2635V19.1427C11.5488 18.9396 11.6574 18.7501 11.8336 18.6485L14.5393 17.0848C14.7089 16.99 14.9394 16.99 15.109 17.0848L17.8146 18.6485C17.9909 18.7501 18.0995 18.9396 18.0995 19.1427V22.2635C18.0995 22.4665 17.9909 22.6561 17.8146 22.7576L15.109 24.3214C15.0276 24.3552 14.9259 24.3823 14.8241 24.3823Z" fill="black">
</path>
<path d="M15.6643 22.2362C14.4775 22.2362 14.2334 21.6946 14.2334 21.2343C14.2334 21.1936 14.2673 21.153 14.3147 21.153H14.6674C14.7081 21.153 14.742 21.1801 14.742 21.2207C14.7963 21.5795 14.9522 21.7555 15.671 21.7555C16.2407 21.7555 16.4847 21.6269 16.4847 21.3223C16.4847 21.1462 16.4169 21.0177 15.5286 20.9297C14.7895 20.8552 14.3284 20.6928 14.3284 20.1038C14.3284 19.5555 14.7895 19.2305 15.5625 19.2305C16.4305 19.2305 16.8577 19.5284 16.912 20.1782C16.912 20.1986 16.9052 20.2189 16.8916 20.2392C16.8781 20.2527 16.8577 20.2663 16.8374 20.2663H16.4779C16.4441 20.2663 16.4101 20.2392 16.4034 20.2053C16.322 19.833 16.1118 19.7111 15.5557 19.7111C14.9319 19.7111 14.8573 19.9278 14.8573 20.0902C14.8573 20.2866 14.9454 20.3475 15.7863 20.4558C16.6204 20.5641 17.0137 20.7198 17.0137 21.302C17.0137 21.8977 16.5187 22.2362 15.6643 22.2362Z" fill="black">
</path>
<path d="M19.5706 18.9597C19.5706 19.244 19.3333 19.481 19.0485 19.481C18.7636 19.481 18.5264 19.2507 18.5264 18.9597C18.5264 18.6618 18.7704 18.4385 19.0485 18.4385C19.3265 18.4385 19.5706 18.6686 19.5706 18.9597ZM18.6077 18.9597C18.6077 19.2034 18.8044 19.3997 19.0417 19.3997C19.2859 19.3997 19.4825 19.1967 19.4825 18.9597C19.4825 18.716 19.2859 18.5264 19.0417 18.5264C18.8111 18.5264 18.6077 18.716 18.6077 18.9597ZM18.8519 18.6686H19.0553C19.1231 18.6686 19.2587 18.6686 19.2587 18.8243C19.2587 18.9326 19.1909 18.9529 19.1502 18.9664C19.2316 18.9732 19.2384 19.0274 19.2451 19.1019C19.2519 19.1493 19.2587 19.2304 19.2722 19.2575H19.1502C19.1502 19.2304 19.1298 19.0815 19.1298 19.0748C19.1231 19.0409 19.1095 19.0274 19.0688 19.0274H18.9672V19.2643H18.8519V18.6686ZM18.9603 18.9258H19.0485C19.1231 18.9258 19.1366 18.8716 19.1366 18.8446C19.1366 18.7634 19.0824 18.7634 19.0485 18.7634H18.9535V18.9258H18.9603Z" fill="black">
</path>
<path clip-rule="evenodd" d="M6.43536 12.1766C6.43536 12.0548 6.36754 11.9397 6.25904 11.8788L3.39059 10.2202C3.34313 10.1932 3.28887 10.1796 3.23463 10.1729C3.22785 10.1729 3.20751 10.1729 3.20751 10.1729C3.15325 10.1729 3.09901 10.1932 3.05154 10.2202L0.176311 11.872C0.067812 11.9329 0 12.048 0 12.1766L0.00678119 16.6174C0.00678119 16.6783 0.0406871 16.7393 0.0949364 16.7663C0.149187 16.8002 0.216998 16.8002 0.264466 16.7663L1.97332 15.7915C2.08183 15.7306 2.14964 15.6155 2.14964 15.4936V13.4154C2.14964 13.2936 2.21745 13.1785 2.32595 13.1176L3.05154 12.6979C3.10579 12.664 3.16682 12.6505 3.22785 12.6505C3.28887 12.6505 3.34991 12.664 3.39738 12.6979L4.12297 13.1176C4.23147 13.1785 4.29927 13.2936 4.29927 13.4154V15.4936C4.29927 15.6155 4.36709 15.7306 4.47559 15.7915L6.17089 16.7663C6.22513 16.8002 6.29295 16.8002 6.3472 16.7663C6.40144 16.7393 6.43536 16.6783 6.43536 16.6174V12.1766Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M26.7521 13.1654C26.7724 13.1519 26.7996 13.1519 26.8199 13.1654L27.3692 13.4836C27.3895 13.4971 27.4031 13.5174 27.4031 13.5445V14.1809C27.4031 14.2079 27.3895 14.2282 27.3692 14.2418L26.8199 14.5599C26.7996 14.5735 26.7724 14.5735 26.7521 14.5599L26.2028 14.2418C26.1825 14.2282 26.1689 14.2079 26.1689 14.1809V13.5445C26.1689 13.5174 26.1825 13.4971 26.2028 13.4836L26.7521 13.1654Z" fill="#5FA04E" fill-rule="evenodd">
</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1er:paint2)">
</path>
</g>
</g>
</g>
<defs>
<lineargradient gradientunits="userSpaceOnUse" id=":r1er:paint0" x1="12.2396" x2="9.61385" y1="11.4775" y2="16.8331">
<stop stop-color="#3F873F">
</stop>
<stop offset="0.3296" stop-color="#3F8B3D">
</stop>
<stop offset="0.6367" stop-color="#3E9638">
</stop>
<stop offset="0.9341" stop-color="#3DA92E">
</stop>
<stop offset="1" stop-color="#3DAE2B">
</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1er:paint1" x1="10.6159" x2="17.9826" y1="14.2811" y2="8.83932">
<stop offset="0.1376" stop-color="#3F873F">
</stop>
<stop offset="0.4016" stop-color="#52A044">
</stop>
<stop offset="0.7129" stop-color="#64B749">
</stop>
<stop offset="0.9081" stop-color="#6ABF4B">
</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1er:paint2" x1="7.69907" x2="14.4172" y1="13.8874" y2="13.8874">
<stop offset="0.0919165" stop-color="#6ABF4B">
</stop>
<stop offset="0.2871" stop-color="#64B749">
</stop>
<stop offset="0.5984" stop-color="#52A044">
</stop>
<stop offset="0.8624" stop-color="#3F873F">
</stop>
</lineargradient>
<clippath id="clip0_2131_12968">
<rect fill="white" height="18.427" transform="translate(0 6)" width="30">
</rect>
</clippath>
</defs>
</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, instock: { $slice: -1 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-527-menu" aria-describedby="select-527-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-528" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask1_2131_12968)">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"$slice"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- -->-<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"}"</span>, <span class="lg-highlight-string">"}"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"$slice"</span>, -<span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/FindIterable.html#projection-org.bson.conversions.Bson-" rel="noopener noreferrer">
<span>
com.mongodb.client.FindIterable.projection
</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
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<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-find-flow/projection.html" rel="noopener noreferrer">
<span>
FindFlow.projection()
</span>
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</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find()
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-core/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
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class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Kotlin"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->{ <!-- --><span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock'</span> => [<span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span>]]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock"</span>: {<span class="lg-highlight-string">"$slice"</span>: -<span class="lg-highlight-number">1</span>}}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{<span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> <!-- -->=<!-- -->> <!-- -->{ <span class="lg-highlight-string">'$slice'</span> <!-- -->=<!-- -->> <!-- -->-<span class="lg-highlight-number">1</span> } })</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
</a>
are the
<em>
only
</em>
operators that you can use to project specific elements
to include in the returned array.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, the following operation will not project the array
with the first element:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"Builders<bsondocument>.Projection.Include(\"instock.0\")","programmingLanguage":"C#"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">Builders<BsonDocument>.Projection.Include("instock.0")</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
For fields that contain arrays, MongoDB provides the following
projection operators for manipulating arrays:
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following example uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
projection operator
to return the last element in the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
array:
</p>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, instock: { $slice: -1 } } )","programmingLanguage":"JavaScript"}
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } } )</td></tr></tbody></table></code></pre>
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<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
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<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
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<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, instock: { $slice: -1 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-576-menu" aria-describedby="select-576-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-577" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
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<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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</mask>
<g mask="url(#mask1_2131_12968)">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"$slice"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- -->-<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"}"</span>, <span class="lg-highlight-string">"}"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"$slice"</span>, -<span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findPublisher = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
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</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-591-menu" aria-describedby="select-591-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-592" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
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<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M26.7521 13.1654C26.7724 13.1519 26.7996 13.1519 26.8199 13.1654L27.3692 13.4836C27.3895 13.4971 27.4031 13.5174 27.4031 13.5445V14.1809C27.4031 14.2079 27.3895 14.2282 27.3692 14.2418L26.8199 14.5599C26.7996 14.5735 26.7724 14.5735 26.7521 14.5599L26.2028 14.2418C26.1825 14.2282 26.1689 14.2079 26.1689 14.1809V13.5445C26.1689 13.5174 26.1825 13.4971 26.2028 13.4836L26.7521 13.1654Z" fill="#5FA04E" fill-rule="evenodd">
</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1fh:paint2)">
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</svg>
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Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
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<p class="leafygreen-ui-1kp3ins">
To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-find-flow/projection.html" rel="noopener noreferrer">
<span>
FindFlow.projection()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
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</path>
</svg>
</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find()
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-core/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
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</path>
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</path>
</svg>
</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Kotlin"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock"</span>: {<span class="lg-highlight-string">"$slice"</span>: -<span class="lg-highlight-number">1</span>}}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->{ <!-- --><span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock'</span> => [<span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span>]]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{<span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> <!-- -->=<!-- -->> <!-- -->{ <span class="lg-highlight-string">'$slice'</span> <!-- -->=<!-- -->> <!-- -->-<span class="lg-highlight-number">1</span> } })</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findObservable = collection.find(equal(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Scala"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
</a>
are the
<em>
only
</em>
operators that you can use to project specific elements
to include in the returned array. For instance, you
<em>
cannot
</em>
project specific array elements using the array index; e.g.
<code class="leafygreen-ui-1l06pbn">
include("instock.0")
</code>
projection does
<em>
not
</em>
project the array
with the first element.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_siktqhd0u" class="leafygreen-ui-38lglc" id="_b42y0lk73" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
For fields that contain arrays, MongoDB provides the following
projection operators for manipulating arrays:
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following example uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
projection operator
to return the last element in the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
array:
</p>
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<div aria-labelledby="_hrzoju680" class="leafygreen-ui-38lglc" id="_w0yjvc8fe" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, instock: { $slice: -1 } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } } )</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div>
<div aria-labelledby="_r99fgvb6t" class="leafygreen-ui-38lglc" id="_7m8zzdb9h" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-621-menu" aria-describedby="select-621-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-622" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask1_2131_12968)">
<path d="M14.8241 24.3823C14.7224 24.3823 14.6274 24.3552 14.5393 24.3078L13.6374 23.7731C13.5018 23.6986 13.5696 23.6715 13.6103 23.658C13.7934 23.597 13.8273 23.5835 14.0172 23.4751C14.0375 23.4616 14.0646 23.4684 14.085 23.4819L14.7767 23.8949C14.8038 23.9084 14.8377 23.9084 14.858 23.8949L17.5637 22.3311C17.5909 22.3176 17.6044 22.2905 17.6044 22.2567V19.136C17.6044 19.1021 17.5909 19.075 17.5637 19.0615L14.858 17.5045C14.8309 17.4909 14.797 17.4909 14.7767 17.5045L12.071 19.0615C12.0439 19.075 12.0302 19.1089 12.0302 19.136V22.2567C12.0302 22.2838 12.0439 22.3176 12.071 22.3311L12.8101 22.7576C13.2102 22.9607 13.4611 22.7237 13.4611 22.4868V19.4067C13.4611 19.3661 13.495 19.3255 13.5425 19.3255H13.8884C13.929 19.3255 13.9697 19.3593 13.9697 19.4067V22.4868C13.9697 23.0217 13.6781 23.333 13.1695 23.333C13.0136 23.333 12.8915 23.333 12.5457 23.1638L11.8336 22.7576C11.6574 22.6561 11.5488 22.4665 11.5488 22.2635V19.1427C11.5488 18.9396 11.6574 18.7501 11.8336 18.6485L14.5393 17.0848C14.7089 16.99 14.9394 16.99 15.109 17.0848L17.8146 18.6485C17.9909 18.7501 18.0995 18.9396 18.0995 19.1427V22.2635C18.0995 22.4665 17.9909 22.6561 17.8146 22.7576L15.109 24.3214C15.0276 24.3552 14.9259 24.3823 14.8241 24.3823Z" fill="black">
</path>
<path d="M15.6643 22.2362C14.4775 22.2362 14.2334 21.6946 14.2334 21.2343C14.2334 21.1936 14.2673 21.153 14.3147 21.153H14.6674C14.7081 21.153 14.742 21.1801 14.742 21.2207C14.7963 21.5795 14.9522 21.7555 15.671 21.7555C16.2407 21.7555 16.4847 21.6269 16.4847 21.3223C16.4847 21.1462 16.4169 21.0177 15.5286 20.9297C14.7895 20.8552 14.3284 20.6928 14.3284 20.1038C14.3284 19.5555 14.7895 19.2305 15.5625 19.2305C16.4305 19.2305 16.8577 19.5284 16.912 20.1782C16.912 20.1986 16.9052 20.2189 16.8916 20.2392C16.8781 20.2527 16.8577 20.2663 16.8374 20.2663H16.4779C16.4441 20.2663 16.4101 20.2392 16.4034 20.2053C16.322 19.833 16.1118 19.7111 15.5557 19.7111C14.9319 19.7111 14.8573 19.9278 14.8573 20.0902C14.8573 20.2866 14.9454 20.3475 15.7863 20.4558C16.6204 20.5641 17.0137 20.7198 17.0137 21.302C17.0137 21.8977 16.5187 22.2362 15.6643 22.2362Z" fill="black">
</path>
<path d="M19.5706 18.9597C19.5706 19.244 19.3333 19.481 19.0485 19.481C18.7636 19.481 18.5264 19.2507 18.5264 18.9597C18.5264 18.6618 18.7704 18.4385 19.0485 18.4385C19.3265 18.4385 19.5706 18.6686 19.5706 18.9597ZM18.6077 18.9597C18.6077 19.2034 18.8044 19.3997 19.0417 19.3997C19.2859 19.3997 19.4825 19.1967 19.4825 18.9597C19.4825 18.716 19.2859 18.5264 19.0417 18.5264C18.8111 18.5264 18.6077 18.716 18.6077 18.9597ZM18.8519 18.6686H19.0553C19.1231 18.6686 19.2587 18.6686 19.2587 18.8243C19.2587 18.9326 19.1909 18.9529 19.1502 18.9664C19.2316 18.9732 19.2384 19.0274 19.2451 19.1019C19.2519 19.1493 19.2587 19.2304 19.2722 19.2575H19.1502C19.1502 19.2304 19.1298 19.0815 19.1298 19.0748C19.1231 19.0409 19.1095 19.0274 19.0688 19.0274H18.9672V19.2643H18.8519V18.6686ZM18.9603 18.9258H19.0485C19.1231 18.9258 19.1366 18.8716 19.1366 18.8446C19.1366 18.7634 19.0824 18.7634 19.0485 18.7634H18.9535V18.9258H18.9603Z" fill="black">
</path>
<path clip-rule="evenodd" d="M6.43536 12.1766C6.43536 12.0548 6.36754 11.9397 6.25904 11.8788L3.39059 10.2202C3.34313 10.1932 3.28887 10.1796 3.23463 10.1729C3.22785 10.1729 3.20751 10.1729 3.20751 10.1729C3.15325 10.1729 3.09901 10.1932 3.05154 10.2202L0.176311 11.872C0.067812 11.9329 0 12.048 0 12.1766L0.00678119 16.6174C0.00678119 16.6783 0.0406871 16.7393 0.0949364 16.7663C0.149187 16.8002 0.216998 16.8002 0.264466 16.7663L1.97332 15.7915C2.08183 15.7306 2.14964 15.6155 2.14964 15.4936V13.4154C2.14964 13.2936 2.21745 13.1785 2.32595 13.1176L3.05154 12.6979C3.10579 12.664 3.16682 12.6505 3.22785 12.6505C3.28887 12.6505 3.34991 12.664 3.39738 12.6979L4.12297 13.1176C4.23147 13.1785 4.29927 13.2936 4.29927 13.4154V15.4936C4.29927 15.6155 4.36709 15.7306 4.47559 15.7915L6.17089 16.7663C6.22513 16.8002 6.29295 16.8002 6.3472 16.7663C6.40144 16.7393 6.43536 16.6783 6.43536 16.6174V12.1766Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M26.7521 13.1654C26.7724 13.1519 26.7996 13.1519 26.8199 13.1654L27.3692 13.4836C27.3895 13.4971 27.4031 13.5174 27.4031 13.5445V14.1809C27.4031 14.2079 27.3895 14.2282 27.3692 14.2418L26.8199 14.5599C26.7996 14.5735 26.7724 14.5735 26.7521 14.5599L26.2028 14.2418C26.1825 14.2282 26.1689 14.2079 26.1689 14.1809V13.5445C26.1689 13.5174 26.1825 13.4971 26.2028 13.4836L26.7521 13.1654Z" fill="#5FA04E" fill-rule="evenodd">
</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1fr:paint2)">
</path>
</g>
</g>
</g>
<defs>
<lineargradient gradientunits="userSpaceOnUse" id=":r1fr:paint0" x1="12.2396" x2="9.61385" y1="11.4775" y2="16.8331">
<stop stop-color="#3F873F">
</stop>
<stop offset="0.3296" stop-color="#3F8B3D">
</stop>
<stop offset="0.6367" stop-color="#3E9638">
</stop>
<stop offset="0.9341" stop-color="#3DA92E">
</stop>
<stop offset="1" stop-color="#3DAE2B">
</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1fr:paint1" x1="10.6159" x2="17.9826" y1="14.2811" y2="8.83932">
<stop offset="0.1376" stop-color="#3F873F">
</stop>
<stop offset="0.4016" stop-color="#52A044">
</stop>
<stop offset="0.7129" stop-color="#64B749">
</stop>
<stop offset="0.9081" stop-color="#6ABF4B">
</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1fr:paint2" x1="7.69907" x2="14.4172" y1="13.8874" y2="13.8874">
<stop offset="0.0919165" stop-color="#6ABF4B">
</stop>
<stop offset="0.2871" stop-color="#64B749">
</stop>
<stop offset="0.5984" stop-color="#52A044">
</stop>
<stop offset="0.8624" stop-color="#3F873F">
</stop>
</lineargradient>
<clippath id="clip0_2131_12968">
<rect fill="white" height="18.427" transform="translate(0 6)" width="30">
</rect>
</clippath>
</defs>
</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, instock: { $slice: -1 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-624-menu" aria-describedby="select-624-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-625" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"$slice"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- -->-<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"}"</span>, <span class="lg-highlight-string">"}"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"$slice"</span>, -<span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/FindIterable.html#projection-org.bson.conversions.Bson-" rel="noopener noreferrer">
<span>
com.mongodb.client.FindIterable.projection
</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
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<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-find-flow/projection.html" rel="noopener noreferrer">
<span>
FindFlow.projection()
</span>
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</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find()
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-core/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
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class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Kotlin"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->{ <!-- --><span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock'</span> => [<span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span>]]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock"</span>: {<span class="lg-highlight-string">"$slice"</span>: -<span class="lg-highlight-number">1</span>}}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{<span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> <!-- -->=<!-- -->> <!-- -->{ <span class="lg-highlight-string">'$slice'</span> <!-- -->=<!-- -->> <!-- -->-<span class="lg-highlight-number">1</span> } })</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
</a>
are the
<em>
only
</em>
operators that you can use to project specific elements
to include in the returned array. For instance, you
<em>
cannot
</em>
project specific array elements using the array index; e.g.
<code class="leafygreen-ui-1l06pbn">
include("instock.0")
</code>
projection does
<em>
not
</em>
project the array
with the first element.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_j4o3rqahy" class="leafygreen-ui-38lglc" id="_kuhl3o5pi" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
For fields that contain arrays, MongoDB provides the following
projection operators for manipulating arrays:
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following example uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
projection operator
to return the last element in the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
array:
</p>
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<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, instock: { $slice: -1 } } )","programmingLanguage":"JavaScript"}
</script>
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<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } } )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
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</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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<div>
<div aria-labelledby="_tpqv5tmtj" class="leafygreen-ui-38lglc" id="_qd48881cs" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-669-menu" aria-describedby="select-669-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-670" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, instock: { $slice: -1 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-672-menu" aria-describedby="select-672-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-673" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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</mask>
<g mask="url(#mask1_2131_12968)">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"$slice"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- -->-<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"}"</span>, <span class="lg-highlight-string">"}"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"$slice"</span>, -<span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findPublisher = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
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</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-687-menu" aria-describedby="select-687-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-688" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
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</path>
<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M26.7521 13.1654C26.7724 13.1519 26.7996 13.1519 26.8199 13.1654L27.3692 13.4836C27.3895 13.4971 27.4031 13.5174 27.4031 13.5445V14.1809C27.4031 14.2079 27.3895 14.2282 27.3692 14.2418L26.8199 14.5599C26.7996 14.5735 26.7724 14.5735 26.7521 14.5599L26.2028 14.2418C26.1825 14.2282 26.1689 14.2079 26.1689 14.1809V13.5445C26.1689 13.5174 26.1825 13.4971 26.2028 13.4836L26.7521 13.1654Z" fill="#5FA04E" fill-rule="evenodd">
</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1gh:paint2)">
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</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
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<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-find-flow/projection.html" rel="noopener noreferrer">
<span>
FindFlow.projection()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
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</path>
</svg>
</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find()
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-core/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
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</path>
</svg>
</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Kotlin"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock"</span>: {<span class="lg-highlight-string">"$slice"</span>: -<span class="lg-highlight-number">1</span>}}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->{ <!-- --><span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock'</span> => [<span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span>]]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{<span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> <!-- -->=<!-- -->> <!-- -->{ <span class="lg-highlight-string">'$slice'</span> <!-- -->=<!-- -->> <!-- -->-<span class="lg-highlight-number">1</span> } })</td></tr></tbody></table></code></pre>
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<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findObservable = collection.find(equal(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Scala"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
</a>
are the
<em>
only
</em>
operators that you can use to project specific elements
to include in the returned array. For instance, you
<em>
cannot
</em>
project specific array elements using the array index; e.g.
<code class="leafygreen-ui-1l06pbn">
include("instock.0")
</code>
projection does
<em>
not
</em>
project the array
with the first element.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_ng9q9shy1" class="leafygreen-ui-38lglc" id="_brcobwfeb" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
For fields that contain arrays, MongoDB provides the following
projection operators for manipulating arrays:
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following example uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
projection operator
to return the last element in the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
array:
</p>
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<div aria-labelledby="_hnxl1srl2" class="leafygreen-ui-38lglc" id="_6xc6gey2u" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, instock: { $slice: -1 } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } } )</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div>
<div aria-labelledby="_jdy7fi1s5" class="leafygreen-ui-38lglc" id="_66of1mtno" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-717-menu" aria-describedby="select-717-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-718" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask1_2131_12968)">
<path d="M14.8241 24.3823C14.7224 24.3823 14.6274 24.3552 14.5393 24.3078L13.6374 23.7731C13.5018 23.6986 13.5696 23.6715 13.6103 23.658C13.7934 23.597 13.8273 23.5835 14.0172 23.4751C14.0375 23.4616 14.0646 23.4684 14.085 23.4819L14.7767 23.8949C14.8038 23.9084 14.8377 23.9084 14.858 23.8949L17.5637 22.3311C17.5909 22.3176 17.6044 22.2905 17.6044 22.2567V19.136C17.6044 19.1021 17.5909 19.075 17.5637 19.0615L14.858 17.5045C14.8309 17.4909 14.797 17.4909 14.7767 17.5045L12.071 19.0615C12.0439 19.075 12.0302 19.1089 12.0302 19.136V22.2567C12.0302 22.2838 12.0439 22.3176 12.071 22.3311L12.8101 22.7576C13.2102 22.9607 13.4611 22.7237 13.4611 22.4868V19.4067C13.4611 19.3661 13.495 19.3255 13.5425 19.3255H13.8884C13.929 19.3255 13.9697 19.3593 13.9697 19.4067V22.4868C13.9697 23.0217 13.6781 23.333 13.1695 23.333C13.0136 23.333 12.8915 23.333 12.5457 23.1638L11.8336 22.7576C11.6574 22.6561 11.5488 22.4665 11.5488 22.2635V19.1427C11.5488 18.9396 11.6574 18.7501 11.8336 18.6485L14.5393 17.0848C14.7089 16.99 14.9394 16.99 15.109 17.0848L17.8146 18.6485C17.9909 18.7501 18.0995 18.9396 18.0995 19.1427V22.2635C18.0995 22.4665 17.9909 22.6561 17.8146 22.7576L15.109 24.3214C15.0276 24.3552 14.9259 24.3823 14.8241 24.3823Z" fill="black">
</path>
<path d="M15.6643 22.2362C14.4775 22.2362 14.2334 21.6946 14.2334 21.2343C14.2334 21.1936 14.2673 21.153 14.3147 21.153H14.6674C14.7081 21.153 14.742 21.1801 14.742 21.2207C14.7963 21.5795 14.9522 21.7555 15.671 21.7555C16.2407 21.7555 16.4847 21.6269 16.4847 21.3223C16.4847 21.1462 16.4169 21.0177 15.5286 20.9297C14.7895 20.8552 14.3284 20.6928 14.3284 20.1038C14.3284 19.5555 14.7895 19.2305 15.5625 19.2305C16.4305 19.2305 16.8577 19.5284 16.912 20.1782C16.912 20.1986 16.9052 20.2189 16.8916 20.2392C16.8781 20.2527 16.8577 20.2663 16.8374 20.2663H16.4779C16.4441 20.2663 16.4101 20.2392 16.4034 20.2053C16.322 19.833 16.1118 19.7111 15.5557 19.7111C14.9319 19.7111 14.8573 19.9278 14.8573 20.0902C14.8573 20.2866 14.9454 20.3475 15.7863 20.4558C16.6204 20.5641 17.0137 20.7198 17.0137 21.302C17.0137 21.8977 16.5187 22.2362 15.6643 22.2362Z" fill="black">
</path>
<path d="M19.5706 18.9597C19.5706 19.244 19.3333 19.481 19.0485 19.481C18.7636 19.481 18.5264 19.2507 18.5264 18.9597C18.5264 18.6618 18.7704 18.4385 19.0485 18.4385C19.3265 18.4385 19.5706 18.6686 19.5706 18.9597ZM18.6077 18.9597C18.6077 19.2034 18.8044 19.3997 19.0417 19.3997C19.2859 19.3997 19.4825 19.1967 19.4825 18.9597C19.4825 18.716 19.2859 18.5264 19.0417 18.5264C18.8111 18.5264 18.6077 18.716 18.6077 18.9597ZM18.8519 18.6686H19.0553C19.1231 18.6686 19.2587 18.6686 19.2587 18.8243C19.2587 18.9326 19.1909 18.9529 19.1502 18.9664C19.2316 18.9732 19.2384 19.0274 19.2451 19.1019C19.2519 19.1493 19.2587 19.2304 19.2722 19.2575H19.1502C19.1502 19.2304 19.1298 19.0815 19.1298 19.0748C19.1231 19.0409 19.1095 19.0274 19.0688 19.0274H18.9672V19.2643H18.8519V18.6686ZM18.9603 18.9258H19.0485C19.1231 18.9258 19.1366 18.8716 19.1366 18.8446C19.1366 18.7634 19.0824 18.7634 19.0485 18.7634H18.9535V18.9258H18.9603Z" fill="black">
</path>
<path clip-rule="evenodd" d="M6.43536 12.1766C6.43536 12.0548 6.36754 11.9397 6.25904 11.8788L3.39059 10.2202C3.34313 10.1932 3.28887 10.1796 3.23463 10.1729C3.22785 10.1729 3.20751 10.1729 3.20751 10.1729C3.15325 10.1729 3.09901 10.1932 3.05154 10.2202L0.176311 11.872C0.067812 11.9329 0 12.048 0 12.1766L0.00678119 16.6174C0.00678119 16.6783 0.0406871 16.7393 0.0949364 16.7663C0.149187 16.8002 0.216998 16.8002 0.264466 16.7663L1.97332 15.7915C2.08183 15.7306 2.14964 15.6155 2.14964 15.4936V13.4154C2.14964 13.2936 2.21745 13.1785 2.32595 13.1176L3.05154 12.6979C3.10579 12.664 3.16682 12.6505 3.22785 12.6505C3.28887 12.6505 3.34991 12.664 3.39738 12.6979L4.12297 13.1176C4.23147 13.1785 4.29927 13.2936 4.29927 13.4154V15.4936C4.29927 15.6155 4.36709 15.7306 4.47559 15.7915L6.17089 16.7663C6.22513 16.8002 6.29295 16.8002 6.3472 16.7663C6.40144 16.7393 6.43536 16.6783 6.43536 16.6174V12.1766Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M26.7521 13.1654C26.7724 13.1519 26.7996 13.1519 26.8199 13.1654L27.3692 13.4836C27.3895 13.4971 27.4031 13.5174 27.4031 13.5445V14.1809C27.4031 14.2079 27.3895 14.2282 27.3692 14.2418L26.8199 14.5599C26.7996 14.5735 26.7724 14.5735 26.7521 14.5599L26.2028 14.2418C26.1825 14.2282 26.1689 14.2079 26.1689 14.1809V13.5445C26.1689 13.5174 26.1825 13.4971 26.2028 13.4836L26.7521 13.1654Z" fill="#5FA04E" fill-rule="evenodd">
</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1gr:paint2)">
</path>
</g>
</g>
</g>
<defs>
<lineargradient gradientunits="userSpaceOnUse" id=":r1gr:paint0" x1="12.2396" x2="9.61385" y1="11.4775" y2="16.8331">
<stop stop-color="#3F873F">
</stop>
<stop offset="0.3296" stop-color="#3F8B3D">
</stop>
<stop offset="0.6367" stop-color="#3E9638">
</stop>
<stop offset="0.9341" stop-color="#3DA92E">
</stop>
<stop offset="1" stop-color="#3DAE2B">
</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1gr:paint1" x1="10.6159" x2="17.9826" y1="14.2811" y2="8.83932">
<stop offset="0.1376" stop-color="#3F873F">
</stop>
<stop offset="0.4016" stop-color="#52A044">
</stop>
<stop offset="0.7129" stop-color="#64B749">
</stop>
<stop offset="0.9081" stop-color="#6ABF4B">
</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1gr:paint2" x1="7.69907" x2="14.4172" y1="13.8874" y2="13.8874">
<stop offset="0.0919165" stop-color="#6ABF4B">
</stop>
<stop offset="0.2871" stop-color="#64B749">
</stop>
<stop offset="0.5984" stop-color="#52A044">
</stop>
<stop offset="0.8624" stop-color="#3F873F">
</stop>
</lineargradient>
<clippath id="clip0_2131_12968">
<rect fill="white" height="18.427" transform="translate(0 6)" width="30">
</rect>
</clippath>
</defs>
</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, instock: { $slice: -1 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-720-menu" aria-describedby="select-720-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-721" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"$slice"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- -->-<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"}"</span>, <span class="lg-highlight-string">"}"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"$slice"</span>, -<span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/FindIterable.html#projection-org.bson.conversions.Bson-" rel="noopener noreferrer">
<span>
com.mongodb.client.FindIterable.projection
</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
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<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
</script>
<div class="css-16lmvu9">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-find-flow/projection.html" rel="noopener noreferrer">
<span>
FindFlow.projection()
</span>
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</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find()
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-core/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
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class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Kotlin"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->{ <!-- --><span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock'</span> => [<span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span>]]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock"</span>: {<span class="lg-highlight-string">"$slice"</span>: -<span class="lg-highlight-number">1</span>}}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{<span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> <!-- -->=<!-- -->> <!-- -->{ <span class="lg-highlight-string">'$slice'</span> <!-- -->=<!-- -->> <!-- -->-<span class="lg-highlight-number">1</span> } })</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
</a>
are the
<em>
only
</em>
operators that you can use to project specific elements
to include in the returned array. For instance, you
<em>
cannot
</em>
project specific array elements using the array index; e.g.
<code class="leafygreen-ui-1l06pbn">
include("instock.0")
</code>
projection does
<em>
not
</em>
project the array
with the first element.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_bkm6odj74" class="" id="_erfxqzfp9" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
For fields that contain arrays, MongoDB provides the following
projection operators for manipulating arrays:
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following example uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
projection operator
to return the last element in the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
array:
</p>
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<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, instock: { $slice: -1 } } )","programmingLanguage":"JavaScript"}
</script>
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<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } } )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
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</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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<div>
<div aria-labelledby="_fuyofdncf" class="leafygreen-ui-38lglc" id="_kjxv8cbok" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-765-menu" aria-describedby="select-765-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-766" type="button" value="Node.js">
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</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, instock: { $slice: -1 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-768-menu" aria-describedby="select-768-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-769" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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</mask>
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</mask>
<g mask="url(#mask1_2131_12968)">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"$slice"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- -->-<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"}"</span>, <span class="lg-highlight-string">"}"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"$slice"</span>, -<span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findPublisher = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
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</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-783-menu" aria-describedby="select-783-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-784" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M19.5706 18.9597C19.5706 19.244 19.3333 19.481 19.0485 19.481C18.7636 19.481 18.5264 19.2507 18.5264 18.9597C18.5264 18.6618 18.7704 18.4385 19.0485 18.4385C19.3265 18.4385 19.5706 18.6686 19.5706 18.9597ZM18.6077 18.9597C18.6077 19.2034 18.8044 19.3997 19.0417 19.3997C19.2859 19.3997 19.4825 19.1967 19.4825 18.9597C19.4825 18.716 19.2859 18.5264 19.0417 18.5264C18.8111 18.5264 18.6077 18.716 18.6077 18.9597ZM18.8519 18.6686H19.0553C19.1231 18.6686 19.2587 18.6686 19.2587 18.8243C19.2587 18.9326 19.1909 18.9529 19.1502 18.9664C19.2316 18.9732 19.2384 19.0274 19.2451 19.1019C19.2519 19.1493 19.2587 19.2304 19.2722 19.2575H19.1502C19.1502 19.2304 19.1298 19.0815 19.1298 19.0748C19.1231 19.0409 19.1095 19.0274 19.0688 19.0274H18.9672V19.2643H18.8519V18.6686ZM18.9603 18.9258H19.0485C19.1231 18.9258 19.1366 18.8716 19.1366 18.8446C19.1366 18.7634 19.0824 18.7634 19.0485 18.7634H18.9535V18.9258H18.9603Z" fill="black">
</path>
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</path>
<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M26.7521 13.1654C26.7724 13.1519 26.7996 13.1519 26.8199 13.1654L27.3692 13.4836C27.3895 13.4971 27.4031 13.5174 27.4031 13.5445V14.1809C27.4031 14.2079 27.3895 14.2282 27.3692 14.2418L26.8199 14.5599C26.7996 14.5735 26.7724 14.5735 26.7521 14.5599L26.2028 14.2418C26.1825 14.2282 26.1689 14.2079 26.1689 14.1809V13.5445C26.1689 13.5174 26.1825 13.4971 26.2028 13.4836L26.7521 13.1654Z" fill="#5FA04E" fill-rule="evenodd">
</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1hh:paint2)">
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<stop offset="0.5984" stop-color="#52A044">
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</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-find-flow/projection.html" rel="noopener noreferrer">
<span>
FindFlow.projection()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
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</path>
</svg>
</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find()
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-core/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
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</path>
</svg>
</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Kotlin"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock"</span>: {<span class="lg-highlight-string">"$slice"</span>: -<span class="lg-highlight-number">1</span>}}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->{ <!-- --><span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock'</span> => [<span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span>]]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{<span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> <!-- -->=<!-- -->> <!-- -->{ <span class="lg-highlight-string">'$slice'</span> <!-- -->=<!-- -->> <!-- -->-<span class="lg-highlight-number">1</span> } })</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findObservable = collection.find(equal(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Scala"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
</a>
are the
<em>
only
</em>
operators that you can use to project specific elements
to include in the returned array. For instance, you
<em>
cannot
</em>
project specific array elements using the array index; e.g.
<code class="leafygreen-ui-1l06pbn">
{ "instock.0": 1 }
</code>
projection does
<em>
not
</em>
project the array
with the first element.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_7g8iu869j" class="leafygreen-ui-38lglc" id="_6zbpbfnip" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
For fields that contain arrays, MongoDB provides the following
projection operators for manipulating arrays:
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following example uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
projection operator
to return the last element in the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
array:
</p>
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<div aria-labelledby="_yxpwha32e" class="leafygreen-ui-38lglc" id="_f0w0qwer" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, instock: { $slice: -1 } } )","programmingLanguage":"JavaScript"}
</script>
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<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } } )</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div>
<div aria-labelledby="_qrrph15lt" class="leafygreen-ui-38lglc" id="_tq2rwkcbj" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-813-menu" aria-describedby="select-813-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-814" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask1_2131_12968)">
<path d="M14.8241 24.3823C14.7224 24.3823 14.6274 24.3552 14.5393 24.3078L13.6374 23.7731C13.5018 23.6986 13.5696 23.6715 13.6103 23.658C13.7934 23.597 13.8273 23.5835 14.0172 23.4751C14.0375 23.4616 14.0646 23.4684 14.085 23.4819L14.7767 23.8949C14.8038 23.9084 14.8377 23.9084 14.858 23.8949L17.5637 22.3311C17.5909 22.3176 17.6044 22.2905 17.6044 22.2567V19.136C17.6044 19.1021 17.5909 19.075 17.5637 19.0615L14.858 17.5045C14.8309 17.4909 14.797 17.4909 14.7767 17.5045L12.071 19.0615C12.0439 19.075 12.0302 19.1089 12.0302 19.136V22.2567C12.0302 22.2838 12.0439 22.3176 12.071 22.3311L12.8101 22.7576C13.2102 22.9607 13.4611 22.7237 13.4611 22.4868V19.4067C13.4611 19.3661 13.495 19.3255 13.5425 19.3255H13.8884C13.929 19.3255 13.9697 19.3593 13.9697 19.4067V22.4868C13.9697 23.0217 13.6781 23.333 13.1695 23.333C13.0136 23.333 12.8915 23.333 12.5457 23.1638L11.8336 22.7576C11.6574 22.6561 11.5488 22.4665 11.5488 22.2635V19.1427C11.5488 18.9396 11.6574 18.7501 11.8336 18.6485L14.5393 17.0848C14.7089 16.99 14.9394 16.99 15.109 17.0848L17.8146 18.6485C17.9909 18.7501 18.0995 18.9396 18.0995 19.1427V22.2635C18.0995 22.4665 17.9909 22.6561 17.8146 22.7576L15.109 24.3214C15.0276 24.3552 14.9259 24.3823 14.8241 24.3823Z" fill="black">
</path>
<path d="M15.6643 22.2362C14.4775 22.2362 14.2334 21.6946 14.2334 21.2343C14.2334 21.1936 14.2673 21.153 14.3147 21.153H14.6674C14.7081 21.153 14.742 21.1801 14.742 21.2207C14.7963 21.5795 14.9522 21.7555 15.671 21.7555C16.2407 21.7555 16.4847 21.6269 16.4847 21.3223C16.4847 21.1462 16.4169 21.0177 15.5286 20.9297C14.7895 20.8552 14.3284 20.6928 14.3284 20.1038C14.3284 19.5555 14.7895 19.2305 15.5625 19.2305C16.4305 19.2305 16.8577 19.5284 16.912 20.1782C16.912 20.1986 16.9052 20.2189 16.8916 20.2392C16.8781 20.2527 16.8577 20.2663 16.8374 20.2663H16.4779C16.4441 20.2663 16.4101 20.2392 16.4034 20.2053C16.322 19.833 16.1118 19.7111 15.5557 19.7111C14.9319 19.7111 14.8573 19.9278 14.8573 20.0902C14.8573 20.2866 14.9454 20.3475 15.7863 20.4558C16.6204 20.5641 17.0137 20.7198 17.0137 21.302C17.0137 21.8977 16.5187 22.2362 15.6643 22.2362Z" fill="black">
</path>
<path d="M19.5706 18.9597C19.5706 19.244 19.3333 19.481 19.0485 19.481C18.7636 19.481 18.5264 19.2507 18.5264 18.9597C18.5264 18.6618 18.7704 18.4385 19.0485 18.4385C19.3265 18.4385 19.5706 18.6686 19.5706 18.9597ZM18.6077 18.9597C18.6077 19.2034 18.8044 19.3997 19.0417 19.3997C19.2859 19.3997 19.4825 19.1967 19.4825 18.9597C19.4825 18.716 19.2859 18.5264 19.0417 18.5264C18.8111 18.5264 18.6077 18.716 18.6077 18.9597ZM18.8519 18.6686H19.0553C19.1231 18.6686 19.2587 18.6686 19.2587 18.8243C19.2587 18.9326 19.1909 18.9529 19.1502 18.9664C19.2316 18.9732 19.2384 19.0274 19.2451 19.1019C19.2519 19.1493 19.2587 19.2304 19.2722 19.2575H19.1502C19.1502 19.2304 19.1298 19.0815 19.1298 19.0748C19.1231 19.0409 19.1095 19.0274 19.0688 19.0274H18.9672V19.2643H18.8519V18.6686ZM18.9603 18.9258H19.0485C19.1231 18.9258 19.1366 18.8716 19.1366 18.8446C19.1366 18.7634 19.0824 18.7634 19.0485 18.7634H18.9535V18.9258H18.9603Z" fill="black">
</path>
<path clip-rule="evenodd" d="M6.43536 12.1766C6.43536 12.0548 6.36754 11.9397 6.25904 11.8788L3.39059 10.2202C3.34313 10.1932 3.28887 10.1796 3.23463 10.1729C3.22785 10.1729 3.20751 10.1729 3.20751 10.1729C3.15325 10.1729 3.09901 10.1932 3.05154 10.2202L0.176311 11.872C0.067812 11.9329 0 12.048 0 12.1766L0.00678119 16.6174C0.00678119 16.6783 0.0406871 16.7393 0.0949364 16.7663C0.149187 16.8002 0.216998 16.8002 0.264466 16.7663L1.97332 15.7915C2.08183 15.7306 2.14964 15.6155 2.14964 15.4936V13.4154C2.14964 13.2936 2.21745 13.1785 2.32595 13.1176L3.05154 12.6979C3.10579 12.664 3.16682 12.6505 3.22785 12.6505C3.28887 12.6505 3.34991 12.664 3.39738 12.6979L4.12297 13.1176C4.23147 13.1785 4.29927 13.2936 4.29927 13.4154V15.4936C4.29927 15.6155 4.36709 15.7306 4.47559 15.7915L6.17089 16.7663C6.22513 16.8002 6.29295 16.8002 6.3472 16.7663C6.40144 16.7393 6.43536 16.6783 6.43536 16.6174V12.1766Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M26.7521 13.1654C26.7724 13.1519 26.7996 13.1519 26.8199 13.1654L27.3692 13.4836C27.3895 13.4971 27.4031 13.5174 27.4031 13.5445V14.1809C27.4031 14.2079 27.3895 14.2282 27.3692 14.2418L26.8199 14.5599C26.7996 14.5735 26.7724 14.5735 26.7521 14.5599L26.2028 14.2418C26.1825 14.2282 26.1689 14.2079 26.1689 14.1809V13.5445C26.1689 13.5174 26.1825 13.4971 26.2028 13.4836L26.7521 13.1654Z" fill="#5FA04E" fill-rule="evenodd">
</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1hr:paint2)">
</path>
</g>
</g>
</g>
<defs>
<lineargradient gradientunits="userSpaceOnUse" id=":r1hr:paint0" x1="12.2396" x2="9.61385" y1="11.4775" y2="16.8331">
<stop stop-color="#3F873F">
</stop>
<stop offset="0.3296" stop-color="#3F8B3D">
</stop>
<stop offset="0.6367" stop-color="#3E9638">
</stop>
<stop offset="0.9341" stop-color="#3DA92E">
</stop>
<stop offset="1" stop-color="#3DAE2B">
</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1hr:paint1" x1="10.6159" x2="17.9826" y1="14.2811" y2="8.83932">
<stop offset="0.1376" stop-color="#3F873F">
</stop>
<stop offset="0.4016" stop-color="#52A044">
</stop>
<stop offset="0.7129" stop-color="#64B749">
</stop>
<stop offset="0.9081" stop-color="#6ABF4B">
</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1hr:paint2" x1="7.69907" x2="14.4172" y1="13.8874" y2="13.8874">
<stop offset="0.0919165" stop-color="#6ABF4B">
</stop>
<stop offset="0.2871" stop-color="#64B749">
</stop>
<stop offset="0.5984" stop-color="#52A044">
</stop>
<stop offset="0.8624" stop-color="#3F873F">
</stop>
</lineargradient>
<clippath id="clip0_2131_12968">
<rect fill="white" height="18.427" transform="translate(0 6)" width="30">
</rect>
</clippath>
</defs>
</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, instock: { $slice: -1 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-816-menu" aria-describedby="select-816-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-817" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"$slice"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- -->-<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"}"</span>, <span class="lg-highlight-string">"}"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"$slice"</span>, -<span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/FindIterable.html#projection-org.bson.conversions.Bson-" rel="noopener noreferrer">
<span>
com.mongodb.client.FindIterable.projection
</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
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<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
</script>
<div class="css-16lmvu9">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-find-flow/projection.html" rel="noopener noreferrer">
<span>
FindFlow.projection()
</span>
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</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find()
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-core/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
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class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Kotlin"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->{ <!-- --><span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock'</span> => [<span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span>]]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock"</span>: {<span class="lg-highlight-string">"$slice"</span>: -<span class="lg-highlight-number">1</span>}}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{<span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> <!-- -->=<!-- -->> <!-- -->{ <span class="lg-highlight-string">'$slice'</span> <!-- -->=<!-- -->> <!-- -->-<span class="lg-highlight-number">1</span> } })</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
</a>
are the
<em>
only
</em>
operators that you can use to project specific elements
to include in the returned array. For instance, you
<em>
cannot
</em>
project specific array elements using the array index; e.g.
<code class="leafygreen-ui-1l06pbn">
{ "instock.0" => 1 }
</code>
projection does
<em>
not
</em>
project the array
with the first element.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_ynktj7vb1" class="leafygreen-ui-38lglc" id="_6bwvdo7w8" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
For fields that contain arrays, MongoDB provides the following
projection operators for manipulating arrays:
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following example uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
projection operator
to return the last element in the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
array:
</p>
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</div>
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</div>
</div>
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<div>
<div aria-labelledby="_zk6rbzesg" class="leafygreen-ui-38lglc" id="_ljcpze6ph" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, instock: { $slice: -1 } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } } )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
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</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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<div>
<div aria-labelledby="_pvqpcykro" class="leafygreen-ui-38lglc" id="_lwdzwnttl" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-861-menu" aria-describedby="select-861-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-862" type="button" value="Node.js">
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</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, instock: { $slice: -1 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-864-menu" aria-describedby="select-864-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-865" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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</mask>
<g mask="url(#mask0_2131_12968)">
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</path>
</mask>
<g mask="url(#mask1_2131_12968)">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"$slice"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- -->-<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"}"</span>, <span class="lg-highlight-string">"}"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"$slice"</span>, -<span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findPublisher = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
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</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
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<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-879-menu" aria-describedby="select-879-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-880" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
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<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
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</path>
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</path>
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</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1ih:paint2)">
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Node.js
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<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
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<p class="leafygreen-ui-1kp3ins">
To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-find-flow/projection.html" rel="noopener noreferrer">
<span>
FindFlow.projection()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
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</path>
</svg>
</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find()
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-core/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
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</path>
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</path>
</svg>
</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Kotlin"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock"</span>: {<span class="lg-highlight-string">"$slice"</span>: -<span class="lg-highlight-number">1</span>}}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->{ <!-- --><span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock'</span> => [<span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span>]]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{<span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> <!-- -->=<!-- -->> <!-- -->{ <span class="lg-highlight-string">'$slice'</span> <!-- -->=<!-- -->> <!-- -->-<span class="lg-highlight-number">1</span> } })</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findObservable = collection.find(equal(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Scala"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
</a>
are the
<em>
only
</em>
operators that you can use to project specific elements
to include in the returned array. For instance, you
<em>
cannot
</em>
project specific array elements using the array index; e.g.
<code class="leafygreen-ui-1l06pbn">
[ "instock.0" => 1 ]
</code>
projection does
<em>
not
</em>
project the array
with the first element.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_s2dx44s2w" class="leafygreen-ui-38lglc" id="_1pkr28zoh" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
For fields that contain arrays, MongoDB provides the following
projection operators for manipulating arrays:
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following example uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
projection operator
to return the last element in the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
array:
</p>
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<div aria-labelledby="_3dbemex88" class="leafygreen-ui-38lglc" id="_uhur1i01d" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, instock: { $slice: -1 } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } } )</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div>
<div aria-labelledby="_ctg62svi9" class="leafygreen-ui-38lglc" id="_hdtx53gok" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-909-menu" aria-describedby="select-909-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-910" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask1_2131_12968)">
<path d="M14.8241 24.3823C14.7224 24.3823 14.6274 24.3552 14.5393 24.3078L13.6374 23.7731C13.5018 23.6986 13.5696 23.6715 13.6103 23.658C13.7934 23.597 13.8273 23.5835 14.0172 23.4751C14.0375 23.4616 14.0646 23.4684 14.085 23.4819L14.7767 23.8949C14.8038 23.9084 14.8377 23.9084 14.858 23.8949L17.5637 22.3311C17.5909 22.3176 17.6044 22.2905 17.6044 22.2567V19.136C17.6044 19.1021 17.5909 19.075 17.5637 19.0615L14.858 17.5045C14.8309 17.4909 14.797 17.4909 14.7767 17.5045L12.071 19.0615C12.0439 19.075 12.0302 19.1089 12.0302 19.136V22.2567C12.0302 22.2838 12.0439 22.3176 12.071 22.3311L12.8101 22.7576C13.2102 22.9607 13.4611 22.7237 13.4611 22.4868V19.4067C13.4611 19.3661 13.495 19.3255 13.5425 19.3255H13.8884C13.929 19.3255 13.9697 19.3593 13.9697 19.4067V22.4868C13.9697 23.0217 13.6781 23.333 13.1695 23.333C13.0136 23.333 12.8915 23.333 12.5457 23.1638L11.8336 22.7576C11.6574 22.6561 11.5488 22.4665 11.5488 22.2635V19.1427C11.5488 18.9396 11.6574 18.7501 11.8336 18.6485L14.5393 17.0848C14.7089 16.99 14.9394 16.99 15.109 17.0848L17.8146 18.6485C17.9909 18.7501 18.0995 18.9396 18.0995 19.1427V22.2635C18.0995 22.4665 17.9909 22.6561 17.8146 22.7576L15.109 24.3214C15.0276 24.3552 14.9259 24.3823 14.8241 24.3823Z" fill="black">
</path>
<path d="M15.6643 22.2362C14.4775 22.2362 14.2334 21.6946 14.2334 21.2343C14.2334 21.1936 14.2673 21.153 14.3147 21.153H14.6674C14.7081 21.153 14.742 21.1801 14.742 21.2207C14.7963 21.5795 14.9522 21.7555 15.671 21.7555C16.2407 21.7555 16.4847 21.6269 16.4847 21.3223C16.4847 21.1462 16.4169 21.0177 15.5286 20.9297C14.7895 20.8552 14.3284 20.6928 14.3284 20.1038C14.3284 19.5555 14.7895 19.2305 15.5625 19.2305C16.4305 19.2305 16.8577 19.5284 16.912 20.1782C16.912 20.1986 16.9052 20.2189 16.8916 20.2392C16.8781 20.2527 16.8577 20.2663 16.8374 20.2663H16.4779C16.4441 20.2663 16.4101 20.2392 16.4034 20.2053C16.322 19.833 16.1118 19.7111 15.5557 19.7111C14.9319 19.7111 14.8573 19.9278 14.8573 20.0902C14.8573 20.2866 14.9454 20.3475 15.7863 20.4558C16.6204 20.5641 17.0137 20.7198 17.0137 21.302C17.0137 21.8977 16.5187 22.2362 15.6643 22.2362Z" fill="black">
</path>
<path d="M19.5706 18.9597C19.5706 19.244 19.3333 19.481 19.0485 19.481C18.7636 19.481 18.5264 19.2507 18.5264 18.9597C18.5264 18.6618 18.7704 18.4385 19.0485 18.4385C19.3265 18.4385 19.5706 18.6686 19.5706 18.9597ZM18.6077 18.9597C18.6077 19.2034 18.8044 19.3997 19.0417 19.3997C19.2859 19.3997 19.4825 19.1967 19.4825 18.9597C19.4825 18.716 19.2859 18.5264 19.0417 18.5264C18.8111 18.5264 18.6077 18.716 18.6077 18.9597ZM18.8519 18.6686H19.0553C19.1231 18.6686 19.2587 18.6686 19.2587 18.8243C19.2587 18.9326 19.1909 18.9529 19.1502 18.9664C19.2316 18.9732 19.2384 19.0274 19.2451 19.1019C19.2519 19.1493 19.2587 19.2304 19.2722 19.2575H19.1502C19.1502 19.2304 19.1298 19.0815 19.1298 19.0748C19.1231 19.0409 19.1095 19.0274 19.0688 19.0274H18.9672V19.2643H18.8519V18.6686ZM18.9603 18.9258H19.0485C19.1231 18.9258 19.1366 18.8716 19.1366 18.8446C19.1366 18.7634 19.0824 18.7634 19.0485 18.7634H18.9535V18.9258H18.9603Z" fill="black">
</path>
<path clip-rule="evenodd" d="M6.43536 12.1766C6.43536 12.0548 6.36754 11.9397 6.25904 11.8788L3.39059 10.2202C3.34313 10.1932 3.28887 10.1796 3.23463 10.1729C3.22785 10.1729 3.20751 10.1729 3.20751 10.1729C3.15325 10.1729 3.09901 10.1932 3.05154 10.2202L0.176311 11.872C0.067812 11.9329 0 12.048 0 12.1766L0.00678119 16.6174C0.00678119 16.6783 0.0406871 16.7393 0.0949364 16.7663C0.149187 16.8002 0.216998 16.8002 0.264466 16.7663L1.97332 15.7915C2.08183 15.7306 2.14964 15.6155 2.14964 15.4936V13.4154C2.14964 13.2936 2.21745 13.1785 2.32595 13.1176L3.05154 12.6979C3.10579 12.664 3.16682 12.6505 3.22785 12.6505C3.28887 12.6505 3.34991 12.664 3.39738 12.6979L4.12297 13.1176C4.23147 13.1785 4.29927 13.2936 4.29927 13.4154V15.4936C4.29927 15.6155 4.36709 15.7306 4.47559 15.7915L6.17089 16.7663C6.22513 16.8002 6.29295 16.8002 6.3472 16.7663C6.40144 16.7393 6.43536 16.6783 6.43536 16.6174V12.1766Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M26.7521 13.1654C26.7724 13.1519 26.7996 13.1519 26.8199 13.1654L27.3692 13.4836C27.3895 13.4971 27.4031 13.5174 27.4031 13.5445V14.1809C27.4031 14.2079 27.3895 14.2282 27.3692 14.2418L26.8199 14.5599C26.7996 14.5735 26.7724 14.5735 26.7521 14.5599L26.2028 14.2418C26.1825 14.2282 26.1689 14.2079 26.1689 14.1809V13.5445C26.1689 13.5174 26.1825 13.4971 26.2028 13.4836L26.7521 13.1654Z" fill="#5FA04E" fill-rule="evenodd">
</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1ir:paint2)">
</path>
</g>
</g>
</g>
<defs>
<lineargradient gradientunits="userSpaceOnUse" id=":r1ir:paint0" x1="12.2396" x2="9.61385" y1="11.4775" y2="16.8331">
<stop stop-color="#3F873F">
</stop>
<stop offset="0.3296" stop-color="#3F8B3D">
</stop>
<stop offset="0.6367" stop-color="#3E9638">
</stop>
<stop offset="0.9341" stop-color="#3DA92E">
</stop>
<stop offset="1" stop-color="#3DAE2B">
</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1ir:paint1" x1="10.6159" x2="17.9826" y1="14.2811" y2="8.83932">
<stop offset="0.1376" stop-color="#3F873F">
</stop>
<stop offset="0.4016" stop-color="#52A044">
</stop>
<stop offset="0.7129" stop-color="#64B749">
</stop>
<stop offset="0.9081" stop-color="#6ABF4B">
</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1ir:paint2" x1="7.69907" x2="14.4172" y1="13.8874" y2="13.8874">
<stop offset="0.0919165" stop-color="#6ABF4B">
</stop>
<stop offset="0.2871" stop-color="#64B749">
</stop>
<stop offset="0.5984" stop-color="#52A044">
</stop>
<stop offset="0.8624" stop-color="#3F873F">
</stop>
</lineargradient>
<clippath id="clip0_2131_12968">
<rect fill="white" height="18.427" transform="translate(0 6)" width="30">
</rect>
</clippath>
</defs>
</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, instock: { $slice: -1 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-912-menu" aria-describedby="select-912-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-913" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"$slice"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- -->-<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"}"</span>, <span class="lg-highlight-string">"}"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"$slice"</span>, -<span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/FindIterable.html#projection-org.bson.conversions.Bson-" rel="noopener noreferrer">
<span>
com.mongodb.client.FindIterable.projection
</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
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<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-find-flow/projection.html" rel="noopener noreferrer">
<span>
FindFlow.projection()
</span>
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</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find()
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-core/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
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class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Kotlin"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->{ <!-- --><span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock'</span> => [<span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span>]]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock"</span>: {<span class="lg-highlight-string">"$slice"</span>: -<span class="lg-highlight-number">1</span>}}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{<span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> <!-- -->=<!-- -->> <!-- -->{ <span class="lg-highlight-string">'$slice'</span> <!-- -->=<!-- -->> <!-- -->-<span class="lg-highlight-number">1</span> } })</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
</a>
are the
<em>
only
</em>
operators that you can use to project specific elements
to include in the returned array. For instance, you
<em>
cannot
</em>
project specific array elements using the array index; e.g.
<code class="leafygreen-ui-1l06pbn">
{ "instock.0": 1 }
</code>
projection does
<em>
not
</em>
project the array
with the first element.
</p>
</div>
</div>
</div>
<div>
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<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
For fields that contain arrays, MongoDB provides the following
projection operators for manipulating arrays:
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following example uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
projection operator
to return the last element in the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
array:
</p>
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<div>
<div aria-labelledby="_ikequxwko" class="leafygreen-ui-38lglc" id="_xpbxbjemr" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, instock: { $slice: -1 } } )","programmingLanguage":"JavaScript"}
</script>
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<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } } )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
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</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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<div aria-labelledby="_y6tjagcqz" class="leafygreen-ui-38lglc" id="_8x0e7eqkb" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-957-menu" aria-describedby="select-957-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-958" type="button" value="Node.js">
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</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, instock: { $slice: -1 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-960-menu" aria-describedby="select-960-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-961" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
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</mask>
<g mask="url(#mask0_2131_12968)">
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</path>
</mask>
<g mask="url(#mask1_2131_12968)">
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"$slice"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- -->-<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"}"</span>, <span class="lg-highlight-string">"}"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"$slice"</span>, -<span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findPublisher = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
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</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-975-menu" aria-describedby="select-975-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-976" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
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</path>
<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
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</path>
<path clip-rule="evenodd" d="M26.7521 13.1654C26.7724 13.1519 26.7996 13.1519 26.8199 13.1654L27.3692 13.4836C27.3895 13.4971 27.4031 13.5174 27.4031 13.5445V14.1809C27.4031 14.2079 27.3895 14.2282 27.3692 14.2418L26.8199 14.5599C26.7996 14.5735 26.7724 14.5735 26.7521 14.5599L26.2028 14.2418C26.1825 14.2282 26.1689 14.2079 26.1689 14.1809V13.5445C26.1689 13.5174 26.1825 13.4971 26.2028 13.4836L26.7521 13.1654Z" fill="#5FA04E" fill-rule="evenodd">
</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1jh:paint2)">
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<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
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<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-find-flow/projection.html" rel="noopener noreferrer">
<span>
FindFlow.projection()
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
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</path>
</svg>
</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find()
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-core/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
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</path>
</svg>
</a>
class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Kotlin"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock"</span>: {<span class="lg-highlight-string">"$slice"</span>: -<span class="lg-highlight-number">1</span>}}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->{ <!-- --><span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock'</span> => [<span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span>]]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{<span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> <!-- -->=<!-- -->> <!-- -->{ <span class="lg-highlight-string">'$slice'</span> <!-- -->=<!-- -->> <!-- -->-<span class="lg-highlight-number">1</span> } })</td></tr></tbody></table></code></pre>
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<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findObservable = collection.find(equal(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Scala"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
</a>
are the
<em>
only
</em>
operators that you can use to project specific elements
to include in the returned array. For instance, you
<em>
cannot
</em>
project specific array elements using the array index; e.g.
<code class="leafygreen-ui-1l06pbn">
{ "instock.0" => 1 }
</code>
projection does
<em>
not
</em>
project the array
with the first element.
</p>
</div>
</div>
</div>
<div>
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<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
For fields that contain arrays, MongoDB provides the following
projection operators for manipulating arrays:
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following example uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
projection operator
to return the last element in the
<code class="leafygreen-ui-1l06pbn">
instock
</code>
array:
</p>
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<div class="leafygreen-ui-1sg2lsz">
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</div>
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<div aria-labelledby="_7vz0ttsc0" class="leafygreen-ui-38lglc" id="_8wqtuwftn" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { status: \"A\" }, { item: 1, status: 1, instock: { $slice: -1 } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } } )</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<div>
<div aria-labelledby="_idy201zd8" class="leafygreen-ui-38lglc" id="_t48era31u" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Filter
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ status: \"A\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-1005-menu" aria-describedby="select-1005-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-1006" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask1_2131_12968)">
<path d="M14.8241 24.3823C14.7224 24.3823 14.6274 24.3552 14.5393 24.3078L13.6374 23.7731C13.5018 23.6986 13.5696 23.6715 13.6103 23.658C13.7934 23.597 13.8273 23.5835 14.0172 23.4751C14.0375 23.4616 14.0646 23.4684 14.085 23.4819L14.7767 23.8949C14.8038 23.9084 14.8377 23.9084 14.858 23.8949L17.5637 22.3311C17.5909 22.3176 17.6044 22.2905 17.6044 22.2567V19.136C17.6044 19.1021 17.5909 19.075 17.5637 19.0615L14.858 17.5045C14.8309 17.4909 14.797 17.4909 14.7767 17.5045L12.071 19.0615C12.0439 19.075 12.0302 19.1089 12.0302 19.136V22.2567C12.0302 22.2838 12.0439 22.3176 12.071 22.3311L12.8101 22.7576C13.2102 22.9607 13.4611 22.7237 13.4611 22.4868V19.4067C13.4611 19.3661 13.495 19.3255 13.5425 19.3255H13.8884C13.929 19.3255 13.9697 19.3593 13.9697 19.4067V22.4868C13.9697 23.0217 13.6781 23.333 13.1695 23.333C13.0136 23.333 12.8915 23.333 12.5457 23.1638L11.8336 22.7576C11.6574 22.6561 11.5488 22.4665 11.5488 22.2635V19.1427C11.5488 18.9396 11.6574 18.7501 11.8336 18.6485L14.5393 17.0848C14.7089 16.99 14.9394 16.99 15.109 17.0848L17.8146 18.6485C17.9909 18.7501 18.0995 18.9396 18.0995 19.1427V22.2635C18.0995 22.4665 17.9909 22.6561 17.8146 22.7576L15.109 24.3214C15.0276 24.3552 14.9259 24.3823 14.8241 24.3823Z" fill="black">
</path>
<path d="M15.6643 22.2362C14.4775 22.2362 14.2334 21.6946 14.2334 21.2343C14.2334 21.1936 14.2673 21.153 14.3147 21.153H14.6674C14.7081 21.153 14.742 21.1801 14.742 21.2207C14.7963 21.5795 14.9522 21.7555 15.671 21.7555C16.2407 21.7555 16.4847 21.6269 16.4847 21.3223C16.4847 21.1462 16.4169 21.0177 15.5286 20.9297C14.7895 20.8552 14.3284 20.6928 14.3284 20.1038C14.3284 19.5555 14.7895 19.2305 15.5625 19.2305C16.4305 19.2305 16.8577 19.5284 16.912 20.1782C16.912 20.1986 16.9052 20.2189 16.8916 20.2392C16.8781 20.2527 16.8577 20.2663 16.8374 20.2663H16.4779C16.4441 20.2663 16.4101 20.2392 16.4034 20.2053C16.322 19.833 16.1118 19.7111 15.5557 19.7111C14.9319 19.7111 14.8573 19.9278 14.8573 20.0902C14.8573 20.2866 14.9454 20.3475 15.7863 20.4558C16.6204 20.5641 17.0137 20.7198 17.0137 21.302C17.0137 21.8977 16.5187 22.2362 15.6643 22.2362Z" fill="black">
</path>
<path d="M19.5706 18.9597C19.5706 19.244 19.3333 19.481 19.0485 19.481C18.7636 19.481 18.5264 19.2507 18.5264 18.9597C18.5264 18.6618 18.7704 18.4385 19.0485 18.4385C19.3265 18.4385 19.5706 18.6686 19.5706 18.9597ZM18.6077 18.9597C18.6077 19.2034 18.8044 19.3997 19.0417 19.3997C19.2859 19.3997 19.4825 19.1967 19.4825 18.9597C19.4825 18.716 19.2859 18.5264 19.0417 18.5264C18.8111 18.5264 18.6077 18.716 18.6077 18.9597ZM18.8519 18.6686H19.0553C19.1231 18.6686 19.2587 18.6686 19.2587 18.8243C19.2587 18.9326 19.1909 18.9529 19.1502 18.9664C19.2316 18.9732 19.2384 19.0274 19.2451 19.1019C19.2519 19.1493 19.2587 19.2304 19.2722 19.2575H19.1502C19.1502 19.2304 19.1298 19.0815 19.1298 19.0748C19.1231 19.0409 19.1095 19.0274 19.0688 19.0274H18.9672V19.2643H18.8519V18.6686ZM18.9603 18.9258H19.0485C19.1231 18.9258 19.1366 18.8716 19.1366 18.8446C19.1366 18.7634 19.0824 18.7634 19.0485 18.7634H18.9535V18.9258H18.9603Z" fill="black">
</path>
<path clip-rule="evenodd" d="M6.43536 12.1766C6.43536 12.0548 6.36754 11.9397 6.25904 11.8788L3.39059 10.2202C3.34313 10.1932 3.28887 10.1796 3.23463 10.1729C3.22785 10.1729 3.20751 10.1729 3.20751 10.1729C3.15325 10.1729 3.09901 10.1932 3.05154 10.2202L0.176311 11.872C0.067812 11.9329 0 12.048 0 12.1766L0.00678119 16.6174C0.00678119 16.6783 0.0406871 16.7393 0.0949364 16.7663C0.149187 16.8002 0.216998 16.8002 0.264466 16.7663L1.97332 15.7915C2.08183 15.7306 2.14964 15.6155 2.14964 15.4936V13.4154C2.14964 13.2936 2.21745 13.1785 2.32595 13.1176L3.05154 12.6979C3.10579 12.664 3.16682 12.6505 3.22785 12.6505C3.28887 12.6505 3.34991 12.664 3.39738 12.6979L4.12297 13.1176C4.23147 13.1785 4.29927 13.2936 4.29927 13.4154V15.4936C4.29927 15.6155 4.36709 15.7306 4.47559 15.7915L6.17089 16.7663C6.22513 16.8002 6.29295 16.8002 6.3472 16.7663C6.40144 16.7393 6.43536 16.6783 6.43536 16.6174V12.1766Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M20.2551 6.06425C20.201 6.03718 20.1332 6.03718 20.0857 6.06425C20.0314 6.0981 19.9975 6.15226 19.9975 6.21318V10.6133C19.9975 10.654 19.9771 10.6946 19.9364 10.7217C19.8958 10.742 19.8551 10.742 19.8144 10.7217L19.0956 10.3087C18.9871 10.2478 18.8582 10.2478 18.7498 10.3087L15.8746 11.9673C15.766 12.0282 15.6982 12.1433 15.6982 12.2651V15.5754C15.6982 15.6973 15.766 15.8123 15.8746 15.8732L18.7498 17.5318C18.8582 17.5927 18.9871 17.5927 19.0956 17.5318L21.9708 15.8732C22.0793 15.8123 22.1471 15.6973 22.1471 15.5754V7.32338C22.1471 7.19476 22.0793 7.07968 21.9708 7.01875L20.2551 6.06425ZM19.9907 14.4855C19.9907 14.5194 19.9771 14.5464 19.9501 14.56L18.9667 15.1286C18.9397 15.1421 18.9057 15.1421 18.8786 15.1286L17.8953 14.56C17.8682 14.5464 17.8547 14.5126 17.8547 14.4855V13.3482C17.8547 13.3144 17.8682 13.2873 17.8953 13.2738L18.8786 12.7051C18.9057 12.6916 18.9397 12.6916 18.9667 12.7051L19.9501 13.2738C19.9771 13.2873 19.9907 13.3212 19.9907 13.3482V14.4855Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M29.8235 13.3214C29.932 13.2605 29.9931 13.1454 29.9931 13.0235V12.218C29.9931 12.0961 29.9253 11.981 29.8235 11.9201L26.9687 10.2683C26.8602 10.2074 26.7314 10.2074 26.6228 10.2683L23.7476 11.9269C23.6391 11.9878 23.5713 12.1029 23.5713 12.2247V15.535C23.5713 15.6569 23.6391 15.772 23.7476 15.8328L26.6025 17.4575C26.7109 17.5185 26.8398 17.5185 26.9415 17.4575L28.6707 16.4963C28.725 16.4692 28.7589 16.4083 28.7589 16.3474C28.7589 16.2864 28.725 16.2255 28.6707 16.1984L25.782 14.5399C25.7277 14.506 25.6938 14.4519 25.6938 14.391V13.3552C25.6938 13.2943 25.7277 13.2334 25.782 13.2063L26.6839 12.6918C26.7381 12.658 26.8059 12.658 26.8602 12.6918L27.7621 13.2063C27.8163 13.2402 27.8502 13.2943 27.8502 13.3552V14.1676C27.8502 14.2285 27.8841 14.2894 27.9384 14.3165C27.9927 14.3504 28.0605 14.3504 28.1147 14.3165L29.8235 13.3214Z" fill="black" fill-rule="evenodd">
</path>
<path clip-rule="evenodd" d="M26.7521 13.1654C26.7724 13.1519 26.7996 13.1519 26.8199 13.1654L27.3692 13.4836C27.3895 13.4971 27.4031 13.5174 27.4031 13.5445V14.1809C27.4031 14.2079 27.3895 14.2282 27.3692 14.2418L26.8199 14.5599C26.7996 14.5735 26.7724 14.5735 26.7521 14.5599L26.2028 14.2418C26.1825 14.2282 26.1689 14.2079 26.1689 14.1809V13.5445C26.1689 13.5174 26.1825 13.4971 26.2028 13.4836L26.7521 13.1654Z" fill="#5FA04E" fill-rule="evenodd">
</path>
<path d="M11.2331 10.2292C11.1227 10.1671 10.9917 10.1671 10.8814 10.2292L7.97807 11.9053C7.86772 11.9673 7.80566 12.0846 7.80566 12.2088V15.5679C7.80566 15.692 7.87462 15.8092 7.97807 15.8714L10.8814 17.5474C10.9917 17.6095 11.1227 17.6095 11.2331 17.5474L14.1364 15.8714C14.2467 15.8092 14.3088 15.692 14.3088 15.5679V12.2088C14.3088 12.0846 14.2398 11.9673 14.1364 11.9053L11.2331 10.2292Z" fill="black">
</path>
<path d="M14.1432 11.9059L11.2261 10.2298C11.1985 10.216 11.164 10.2022 11.1365 10.1953L7.875 15.7825C7.90258 15.817 7.94609 15.8673 7.98056 15.888L10.8813 17.548C10.9641 17.5963 11.0606 17.6101 11.1503 17.5825L14.219 11.968C14.1983 11.9404 14.1708 11.9197 14.1432 11.9059Z" fill="black">
</path>
<path d="M14.136 15.8715C14.2187 15.8231 14.2933 15.7327 14.2933 15.6236L11.1154 10.1879C11.0326 10.1741 10.943 10.181 10.8671 10.2293L7.9707 11.8985L11.0947 17.5958C11.1361 17.5889 11.1843 17.5751 11.2257 17.5544L14.136 15.8715Z" fill="url(#:r1jr:paint2)">
</path>
</g>
</g>
</g>
<defs>
<lineargradient gradientunits="userSpaceOnUse" id=":r1jr:paint0" x1="12.2396" x2="9.61385" y1="11.4775" y2="16.8331">
<stop stop-color="#3F873F">
</stop>
<stop offset="0.3296" stop-color="#3F8B3D">
</stop>
<stop offset="0.6367" stop-color="#3E9638">
</stop>
<stop offset="0.9341" stop-color="#3DA92E">
</stop>
<stop offset="1" stop-color="#3DAE2B">
</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1jr:paint1" x1="10.6159" x2="17.9826" y1="14.2811" y2="8.83932">
<stop offset="0.1376" stop-color="#3F873F">
</stop>
<stop offset="0.4016" stop-color="#52A044">
</stop>
<stop offset="0.7129" stop-color="#64B749">
</stop>
<stop offset="0.9081" stop-color="#6ABF4B">
</stop>
</lineargradient>
<lineargradient gradientunits="userSpaceOnUse" id=":r1jr:paint2" x1="7.69907" x2="14.4172" y1="13.8874" y2="13.8874">
<stop offset="0.0919165" stop-color="#6ABF4B">
</stop>
<stop offset="0.2871" stop-color="#64B749">
</stop>
<stop offset="0.5984" stop-color="#52A044">
</stop>
<stop offset="0.8624" stop-color="#3F873F">
</stop>
</lineargradient>
<clippath id="clip0_2131_12968">
<rect fill="white" height="18.427" transform="translate(0 6)" width="30">
</rect>
</clippath>
</defs>
</svg>
<div class="leafygreen-ui-obh8q1">
<div class="lg-ui-select-menu-0000 leafygreen-ui-17aj16e" data-lgid="lg-select-button_text">
Node.js
</div>
</div>
<svg alt="" aria-hidden="true" class="leafygreen-ui-fn50nl" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M8.67903 10.7962C8.45271 11.0679 8.04729 11.0679 7.82097 10.7962L4.63962 6.97649C4.3213 6.59428 4.5824 6 5.06866 6L11.4313 6C11.9176 6 12.1787 6.59428 11.8604 6.97649L8.67903 10.7962Z" fill="currentColor">
</path>
</svg>
</div>
</button>
<div aria-live="polite" aria-relevant="all" class="leafygreen-ui-11ydt2g" data-lgid="lg-form_field-feedback" data-testid="lg-form_field-feedback">
</div>
</div>
</div>
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Options
</span>
to open the additional query
options.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the following expression into the
<span class="guilabel css-h15tq0">
Project
</span>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ item: 1, status: 1, instock: { $slice: -1 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-9lvdmr">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-hcrzu6" data-testid="leafygreen-code-panel">
<div class="leafygreen-ui-148abs6">
<div class="leafygreen-ui-omjz13" data-lgid="lg-select">
<button aria-controls="select-1008-menu" aria-describedby="select-1008-description" aria-disabled="false" aria-expanded="false" aria-invalid="false" aria-labelledby="Language Picker" class="lg-ui-button-0000 leafygreen-ui-dvfj9v" data-lgid="lg-button" data-testid="leafygreen-ui-select-menubutton" id="select-1009" type="button" value="Node.js">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg aria-hidden="true" class="leafygreen-ui-18si895" fill="none" role="presentation" viewbox="0 0 30 30" xmlns="http://www.w3.org/2000/svg">
<g clip-path="url(#clip0_2131_12968)">
<mask height="19" id="mask0_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
</mask>
<g mask="url(#mask0_2131_12968)">
<mask height="19" id="mask1_2131_12968" maskunits="userSpaceOnUse" width="30" x="0" y="6">
<path d="M30 6.04395H0V24.3825H30V6.04395Z" fill="white">
</path>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongoc_collection_t *collection;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *filter;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bson_t *opts;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">mongoc_cursor_t *cursor;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">collection <!-- -->= <!-- -->mongoc_database_get_collection (db<!-- -->, <span class="lg-highlight-string">"inventory"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">filter <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<!-- --><!-- --><span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_UTF8</span> <!-- -->(<span class="lg-highlight-string">"A"</span>));</td></tr><tr class=""><td class="leafygreen-ui-7razhx">opts <!-- -->= <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_NEW</span> (<span class="lg-highlight-string">"projection"</span>, <span class="lg-highlight-string">"{"</span>, <!-- --><!-- --><span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"status"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- --><span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"instock"</span>, <span class="lg-highlight-string">"{"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"$slice"</span>, <!-- --><span class="lg-highlight-variable lg-highlight-constant">BCON_INT64</span> (<!-- -->-<span class="lg-highlight-number">1</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"}"</span>, <span class="lg-highlight-string">"}"</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor <!-- -->= <!-- -->mongoc_collection_find_with_opts (collection<!-- -->, filter, opts, <span class="lg-highlight-variable lg-highlight-constant">NULL</span>);</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> filter = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Filter</span>.<span class="lg-highlight-title lg-highlight-class">Eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> projection = <span class="lg-highlight-title lg-highlight-class">Builders</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>.<span class="lg-highlight-property">Projection</span>.<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"item"</span>).<span class="lg-highlight-title lg-highlight-class">Include</span>(<span class="lg-highlight-string">"status"</span>).<span class="lg-highlight-title lg-highlight-class">Slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>);</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> result = collection.<span class="lg-highlight-property">Find</span><<span class="lg-highlight-title lg-highlight-class">BsonDocument</span>>(filter).<span class="lg-highlight-title lg-highlight-class">Project</span>(projection).<span class="lg-highlight-title lg-highlight-class">ToList</span>();</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">projection <!-- -->:<!-- -->= bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"instock"</span>, bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"$slice"</span>, -<span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cursor<!-- -->, <!-- -->err := coll.<span class="lg-highlight-title lg-highlight-class">Find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> context.<span class="lg-highlight-title lg-highlight-function">TODO</span>(),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bson.<span class="lg-highlight-property">D</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options.<span class="lg-highlight-title lg-highlight-class">Find</span>().<span class="lg-highlight-title lg-highlight-class">SetProjection</span>(projection),</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findPublisher = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/FindIterable.html#projection-org.bson.conversions.Bson-" rel="noopener noreferrer">
<span>
com.mongodb.client.FindIterable.projection
</span>
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<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://mongodb.github.io/mongo-java-driver/3.4/javadoc/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
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<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"findIterable = collection.find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)));","programmingLanguage":"Java"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findIterable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)));</td></tr></tbody></table></code></pre>
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Node.js
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To specify a projection document, chain the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-kotlin-coroutine/mongodb-driver-kotlin-coroutine/com.mongodb.kotlin.client.coroutine/-find-flow/projection.html" rel="noopener noreferrer">
<span>
FindFlow.projection()
</span>
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</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
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</a>
method to the
<code class="leafygreen-ui-1l06pbn">
find()
</code>
method. The example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://mongodb.github.io/mongo-java-driver/4.11/apidocs/mongodb-driver-core/com/mongodb/client/model/Projections.html" rel="noopener noreferrer">
<span>
com.mongodb.client.model.Projections
</span>
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class to create the
projection documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"val findFlow = collection\n .find(eq(\"status\", \"A\"))\n .projection(fields(include(\"item\", \"status\"), slice(\"instock\", -1)))","programmingLanguage":"Kotlin"}
</script>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">val findFlow = collection</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">eq</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> cursor <!-- -->= <!-- -->db</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">collection</span>(<span class="lg-highlight-string">'inventory'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> })</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">project</span>(<!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">instock</span>: <!-- -->{ <span class="lg-highlight-attr">$slice</span>: <!-- -->-<span class="lg-highlight-number">1</span> } })<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor<!-- --> <!-- -->= <!-- -->$db<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">coll</span>(<span class="lg-highlight-string">"inventory"</span>)<!-- -->-<!-- -->><!-- --><!-- --><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-string">"A"</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-params lg-highlight-function">projection</span><!-- --><span class="lg-highlight-function"> =></span> { <span class="lg-highlight-params lg-highlight-function">item</span><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">status</span><!-- --><span class="lg-highlight-function"> =></span> <span class="lg-highlight-number">1</span>, <span class="lg-highlight-params lg-highlight-function">instock</span><!-- --><span class="lg-highlight-function"> =></span> <!-- -->{ <!-- --><span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$cursor = $db->inventory-><span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-string">'A'</span>],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [<span class="lg-highlight-string">'projection'</span> => [<span class="lg-highlight-string">'item'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'status'</span> => <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'instock'</span> => [<span class="lg-highlight-string">'$slice'</span> => -<span class="lg-highlight-number">1</span>]]],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)<!-- -->;</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cursor = db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {<span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"A"</span>}, {<span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"instock"</span>: {<span class="lg-highlight-string">"$slice"</span>: -<span class="lg-highlight-number">1</span>}}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">client<!-- -->[<!-- -->:inventory].<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">projection</span>: <!-- -->{<span class="lg-highlight-string">'item'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'status'</span> <!-- -->=<!-- -->> <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'instock'</span> <!-- -->=<!-- -->> <!-- -->{ <span class="lg-highlight-string">'$slice'</span> <!-- -->=<!-- -->> <!-- -->-<span class="lg-highlight-number">1</span> } })</td></tr></tbody></table></code></pre>
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<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">findObservable = collection.<span class="lg-highlight-title lg-highlight-function">find</span>(<span class="lg-highlight-title lg-highlight-function">equal</span>(<span class="lg-highlight-string">"status"</span>, <span class="lg-highlight-string">"A"</span>))</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> .<span class="lg-highlight-title lg-highlight-function">projection</span>(<span class="lg-highlight-title lg-highlight-function">fields</span>(<span class="lg-highlight-title lg-highlight-function">include</span>(<span class="lg-highlight-string">"item"</span>, <span class="lg-highlight-string">"status"</span>), <span class="lg-highlight-title lg-highlight-function">slice</span>(<span class="lg-highlight-string">"instock"</span>, -<span class="lg-highlight-number">1</span>)))</td></tr></tbody></table></code></pre>
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<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/elemMatch/#mongodb-projection-proj.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/slice/#mongodb-projection-proj.-slice">
<code class="leafygreen-ui-1l06pbn">
$slice
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/projection/positional/#mongodb-projection-proj.-">
<code class="leafygreen-ui-1l06pbn">
$
</code>
</a>
are the
<em>
only
</em>
operators that you can use to project specific elements
to include in the returned array. For instance, you
<em>
cannot
</em>
project specific array elements using the array index; e.g.
<code class="leafygreen-ui-1l06pbn">
include("instock.0")
</code>
projection does
<em>
not
</em>
project the array
with the first element.
</p>
</div>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Project Fields with Aggregation Expressions
<a class="headerlink leafygreen-ui-1kepx47" href="#project-fields-with-aggregation-expressions" title="Permalink to this heading">
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</path>
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</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can specify
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
aggregation expressions
</a>
in a query projection. Aggregation expressions let you project new
fields and modify the values of existing fields.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, the following operation uses aggregation expressions to
override the value of the
<code class="leafygreen-ui-1l06pbn">
status
</code>
field, and project new fields
<code class="leafygreen-ui-1l06pbn">
area
</code>
and
<code class="leafygreen-ui-1l06pbn">
reportNumber
</code>
.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The following example uses MongoDB Shell syntax. For driver examples
of projection with aggregation, see your
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
driver
documentation
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
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<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$switch</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">branches</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">case</span>: <!-- -->{ <span class="lg-highlight-attr">$eq</span>: <!-- -->[ <span class="lg-highlight-string">"$status"</span>, <span class="lg-highlight-string">"A"</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">then</span>: <span class="lg-highlight-string">"Available"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">case</span>: <!-- -->{ <span class="lg-highlight-attr">$eq</span>: <!-- -->[ <span class="lg-highlight-string">"$status"</span>, <span class="lg-highlight-string">"D"</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">then</span>: <span class="lg-highlight-string">"Discontinued"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">default</span>: <span class="lg-highlight-string">"No status found"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">area</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$concat</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$toString</span>: <!-- -->{ <span class="lg-highlight-attr">$multiply</span>: <!-- -->[ <span class="lg-highlight-string">"$size.h"</span>, <span class="lg-highlight-string">"$size.w"</span> ] } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">" "</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"$size.uom"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">reportNumber</span>: <!-- -->{ <span class="lg-highlight-attr">$literal</span>: <span class="lg-highlight-number">1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n item: 'journal',\n status: 'Available',\n area: '294 cm',\n reportNumber: 1\n },\n {\n item: 'planner',\n status: 'Discontinued',\n area: '685.5 cm',\n reportNumber: 1\n },\n {\n item: 'notebook',\n status: 'Available',\n area: '93.5 in',\n reportNumber: 1\n },\n {\n item: 'paper',\n status: 'Discontinued',\n area: '93.5 in',\n reportNumber: 1\n },\n {\n item: 'postcard',\n status: 'Available',\n area: '152.5 cm',\n reportNumber: 1\n }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1sax7hu e11q6jfk0" style="--code-container-border:initial;--code-pre-border:none">
<div class="leafygreen-ui-1fyvhqe">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-12cejcz" tabindex="-1"><code class="lg-highlight-hljs-dark javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'journal'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'Available'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">area</span>: <span class="lg-highlight-string">'294 cm'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">reportNumber</span>: <span class="lg-highlight-number">1</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'planner'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'Discontinued'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">area</span>: <span class="lg-highlight-string">'685.5 cm'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">reportNumber</span>: <span class="lg-highlight-number">1</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'notebook'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'Available'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">area</span>: <span class="lg-highlight-string">'93.5 in'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">reportNumber</span>: <span class="lg-highlight-number">1</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'paper'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'Discontinued'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">area</span>: <span class="lg-highlight-string">'93.5 in'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">reportNumber</span>: <span class="lg-highlight-number">1</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'postcard'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'Available'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">area</span>: <span class="lg-highlight-string">'152.5 cm'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">reportNumber</span>: <span class="lg-highlight-number">1</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-project-fields-atlas-ui">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Project Fields to Return from a Query with MongoDB Atlas
<a class="headerlink leafygreen-ui-1kepx47" href="#project-fields-to-return-from-a-query-with-mongodb-atlas" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="project-fields-to-return-from-a-query-with-mongodb-atlas">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The example in this section uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/sample-data/sample-mflix/" target="_self">
<span>
sample movies dataset
</span>
</a>
. To learn how to load the sample dataset
into your MongoDB Atlas deployment, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/sample-data/#std-label-load-sample-data" target="_self">
<span>
Load Sample Data
<!-- -->
.
</span>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
To project fields to return from a query in MongoDB Atlas, follow these
steps:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"HowTo","steps":[{"@type":"HowToStep","text":"If it's not already displayed, select the organization that\ncontains your desired project from the Organizations menu in the\nnavigation bar.If it's not already displayed, select your project\nfrom the Projects menu in the navigation bar.If it's not already displayed, click Clusters in the\nsidebar.The Clusters page displays.","name":"In the MongoDB Atlas UI, go to the Clusters page for your project."},{"@type":"HowToStep","text":"For the cluster that contains the sample data,\nclick Browse Collections.In the left navigation pane, select the\nsample_mflix database.Select the movies collection.","name":"Navigate to the collection"},{"@type":"HowToStep","text":"Click More Options on the right side of the\nFilter field.Specify the query filter.Specify the query filter document\nin the Filter field. A query filter document uses\nquery operators to specify\nsearch conditions.Copy the following query filter document into the\nFilter search bar:","name":"Specify the Filter field"},{"@type":"HowToStep","text":"Specify the field(s) to return in the query results.Copy the following project document into the Project\nbar:","name":"Specify the fields to project"},{"@type":"HowToStep","text":"This query filter returns the following fields for all documents\nin the sample_mflix.movies collection where the year\nfield matches 1924:_idtitleplotMongoDB Atlas returns the _id field by default. To omit the\n_id field, copy the following project document\ninto the Project bar and click Apply:","name":"Click Apply"}],"name":"Project Fields to Return from a Query with MongoDB Atlas","image":"https://webimages.mongodb.com/_com_assets/cms/kuyj2focmkbxv7gh3-stacked_default_slate_blue.svg?auto=format%252Ccompress"}
</script>
<div class="css-4nyere eccljxs0">
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
1
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
In the MongoDB Atlas UI, go to the
<span class="guilabel css-h15tq0">
Clusters
</span>
page for your project.
<a class="headerlink leafygreen-ui-1kepx47" href="#in-the-mongodb-atlas-ui--go-to-the-clusters-page-for-your-project." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="in-the-mongodb-atlas-ui--go-to-the-clusters-page-for-your-project.">
</div>
</a>
</h3>
<ol class="leafygreen-ui-rioki0" type="a">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If it's not already displayed, select the organization that
contains your desired project from the
<i class="mms-icon-office mms-icon">
</i>
<span class="guilabel css-h15tq0">
Organizations
</span>
menu
<!-- -->
in the
navigation bar.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If it's not already displayed, select your project
from the
<span class="guilabel css-h15tq0">
Projects
</span>
menu in the navigation bar.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If it's not already displayed, click
<span class="guilabel css-h15tq0">
Clusters
</span>
in the
sidebar.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://cloud.mongodb.com/go?l=https%3A%2F%2Fcloud.mongodb.com%2Fv2%2F%3Cproject%3E%23%2Fclusters" target="_self">
<span>
Clusters
</span>
</a>
page displays.
</p>
</li>
</ol>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
2
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Navigate to the collection
<a class="headerlink leafygreen-ui-1kepx47" href="#navigate-to-the-collection" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="navigate-to-the-collection">
</div>
</a>
</h3>
<ol class="leafygreen-ui-rioki0" type="a">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
For the cluster that contains the sample data,
click
<span class="guilabel css-h15tq0">
Browse Collections
</span>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
In the left navigation pane, select the
<code class="leafygreen-ui-1l06pbn">
sample_mflix
</code>
database.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Select the
<code class="leafygreen-ui-1l06pbn">
movies
</code>
collection.
</p>
</li>
</ol>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
3
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Specify the Filter field
<a class="headerlink leafygreen-ui-1kepx47" href="#specify-the-filter-field" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="specify-the-filter-field">
</div>
</a>
</h3>
<ol class="leafygreen-ui-rioki0" type="a">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
More Options
</span>
on the right side of the
<span class="guilabel css-h15tq0">
Filter
</span>
field.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Specify the query filter.
</p>
<p class="leafygreen-ui-1kp3ins">
Specify the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/document/#std-label-document-query-filter">
query filter document
</a>
in the
<span class="guilabel css-h15tq0">
Filter
</span>
field. A query filter document uses
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/csfle/reference/supported-operations/#std-label-csfle-supported-query-operators">
query operators
</a>
to specify
search conditions.
</p>
<p class="leafygreen-ui-1kp3ins">
Copy the following query filter document into the
<span class="guilabel css-h15tq0">
Filter
</span>
search bar:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ year: 1924 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">year</span>: <span class="lg-highlight-number">1924</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
</ol>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
4
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Specify the fields to project
<a class="headerlink leafygreen-ui-1kepx47" href="#specify-the-fields-to-project" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="specify-the-fields-to-project">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Specify the field(s) to return in the query results.
</p>
<p class="leafygreen-ui-1kp3ins">
Copy the following project document into the
<span class="guilabel css-h15tq0">
Project
</span>
bar:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ title: 1, plot: 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">title</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">plot</span>: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
5
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Click Apply
<a class="headerlink leafygreen-ui-1kepx47" href="#click-apply" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="click-apply">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
This query filter returns the following fields for all documents
in the
<code class="leafygreen-ui-1l06pbn">
sample_mflix.movies
</code>
collection where the
<code class="leafygreen-ui-1l06pbn">
year
</code>
field matches
<code class="leafygreen-ui-1l06pbn">
1924
</code>
:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
_id
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
title
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
plot
</code>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
MongoDB Atlas returns the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field by default. To omit the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field, copy the following project document
into the
<span class="guilabel css-h15tq0">
Project
</span>
bar and click
<span class="guilabel css-h15tq0">
Apply
</span>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ title: 1, plot: 1, _id: 0 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">title</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">plot</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">0</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Additional Considerations
<a class="headerlink leafygreen-ui-1kepx47" href="#additional-considerations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="additional-considerations">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
MongoDB enforces additional restrictions with regards to projections.
See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/limits/#mongodb-limit-Projection-Restrictions">
Projection Restrictions
</a>
for details.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#std-label-find-projection">
Projection
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/query-documents/">
Query Documents
</a>
</p>
</li>
</ul>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/tutorial/use-database-commands/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Use Database Commands
<a class="headerlink leafygreen-ui-1kepx47" href="#use-database-commands" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="use-database-commands">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#database-command-form" target="_self">
<span>
Database Command Form
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#issue-commands" target="_self">
<span>
Issue Commands
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#admin-database-commands" target="_self">
<span>
<code class="css-1kekw28 e1wawog0">
admin
</code>
Database Commands
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#command-responses" target="_self">
<span>
Command Responses
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
The MongoDB command interface provides access to all
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-CRUD">
non CRUD
</a>
database operations. Fetching server statistics, initializing a
replica set, and running an aggregation pipeline or map-reduce job are
all accomplished with commands.
</p>
<p class="leafygreen-ui-1kp3ins">
See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/">
Database Commands
</a>
for list of all commands sorted by
function.
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Database Command Form
<a class="headerlink leafygreen-ui-1kepx47" href="#database-command-form" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="database-command-form">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You specify a command first by constructing a standard
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-BSON">
BSON
</a>
document whose first key is the name of the command. For example,
specify the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/hello/#mongodb-dbcommand-dbcmd.hello">
<code class="leafygreen-ui-1l06pbn">
hello
</code>
</a>
command using the following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-BSON">
BSON
</a>
document:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ hello: 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">hello</span>: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</button>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-issue-commands">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Issue Commands
<a class="headerlink leafygreen-ui-1kepx47" href="#issue-commands" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="issue-commands">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
provides a helper method for running
commands called
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.runCommand/#mongodb-method-db.runCommand">
<code class="leafygreen-ui-1l06pbn">
db.runCommand()
</code>
</a>
. The following operation in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
runs the previous command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand( { hello: 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>( <!-- -->{ <span class="lg-highlight-attr">hello</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Many
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
Drivers
</span>
</a>
provide an equivalent for
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.runCommand/#mongodb-method-db.runCommand">
<code class="leafygreen-ui-1l06pbn">
db.runCommand()
</code>
</a>
method. Internally, running commands
with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.runCommand/#mongodb-method-db.runCommand">
<code class="leafygreen-ui-1l06pbn">
db.runCommand()
</code>
</a>
is equivalent to a special query
against the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term--cmd">
$cmd
</a>
collection.
</p>
<p class="leafygreen-ui-1kp3ins">
Many common commands have their own shell helpers or wrappers in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
and drivers, such as the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.hello/#mongodb-method-db.hello">
<code class="leafygreen-ui-1l06pbn">
db.hello()
</code>
</a>
method in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
.
</span>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
You can use the
<code class="leafygreen-ui-1l06pbn">
maxTimeMS
</code>
option to specify a time limit for the
execution of a command, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/terminate-running-operations/#std-label-terminate-long-running-commands">
Terminate a Command
</a>
for
more information on operation termination.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-admin-command">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
<code class="leafygreen-ui-1l06pbn">
admin
</code>
Database Commands
<a class="headerlink leafygreen-ui-1kepx47" href="#admin-database-commands" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="admin-database-commands">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You must run some commands on the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-admin-database">
admin database
</a>
. Normally,
these operations resemble the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"use admin\ndb.runCommand( {buildInfo: 1} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">use admin</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>( <!-- -->{<span class="lg-highlight-attr">buildInfo</span>: <span class="lg-highlight-number">1</span>} )</td></tr></tbody></table></code></pre>
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
However, there's also a command helper that automatically runs the
command in the context of the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.adminCommand( {buildInfo: 1} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>( <!-- -->{<span class="lg-highlight-attr">buildInfo</span>: <span class="lg-highlight-number">1</span>} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Command Responses
<a class="headerlink leafygreen-ui-1kepx47" href="#command-responses" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="command-responses">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
For all commands, MongoDB returns a response document that contains the
following fields:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:30%"/>
<col style="width:70%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<em>
<command result>
</em>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Result fields specific to the
<code class="leafygreen-ui-1l06pbn">
command
</code>
that ran.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ok
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
A number that indicates if the command succeeded (
<code class="leafygreen-ui-1l06pbn">
1
</code>
)
or failed (
<code class="leafygreen-ui-1l06pbn">
0
</code>
).
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
operationTime
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The logical time of the operation. MongoDB uses the logical time
to order operations.
<em>
Only for replica sets and sharded
clusters.
</em>
</p>
<p class="leafygreen-ui-1kp3ins">
If the command does not generate an oplog entry, for example, a
read operation, then the operation does not advance the logical
clock. In this case,
<code class="leafygreen-ui-1l06pbn">
operationTime
</code>
returns:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
For read concern
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-local/#mongodb-readconcern-readconcern.-local-">
<code class="leafygreen-ui-1l06pbn">
"local"
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-snapshot/#mongodb-readconcern-readconcern.-snapshot-">
<code class="leafygreen-ui-1l06pbn">
"snapshot"
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-linearizable/#mongodb-readconcern-readconcern.-linearizable-">
<code class="leafygreen-ui-1l06pbn">
"linearizable"
</code>
</a>
,
the timestamp of the most recent entry in the oplog.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
For read concern
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-majority/#mongodb-readconcern-readconcern.-majority-">
<code class="leafygreen-ui-1l06pbn">
"majority"
</code>
</a>
, the timestamp of
the most recent
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#mongodb-writeconcern-writeconcern.-majority-">
<code class="leafygreen-ui-1l06pbn">
majority-acknowledged
</code>
</a>
entry in the oplog.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For operations associated with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/read-isolation-consistency-recency/#std-label-causal-consistency">
causally consistent sessions
</a>
, the MongoDB drivers use the logical time
to automatically set the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern/#std-label-afterClusterTime">
Read Operations and
<code class="leafygreen-ui-1l06pbn">
afterClusterTime
</code>
</a>
period.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
$clusterTime
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
A document that returns the signed cluster time. Cluster time is a
logical time used for ordering of operations.
<em>
Only for replica
sets and sharded clusters. For internal use only.
</em>
</p>
<p class="leafygreen-ui-1kp3ins">
The document contains the following fields:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
clusterTime
</code>
: timestamp of the highest known cluster time for the member.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
signature
</code>
: a document that contains the hash of the cluster time and the id
of the key used to sign the cluster time.
</p>
</li>
</ul>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/tutorial/analyze-query-plan/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Interpret Explain Plan Results
<a class="headerlink leafygreen-ui-1kepx47" href="#interpret-explain-plan-results" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="interpret-explain-plan-results">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#evaluate-the-performance-of-a-query" target="_self">
<span>
Evaluate the Performance of a Query
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
You can use explain results to determine the following information about
a query:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The amount of time a query took to complete
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Whether the query used an index
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The number of documents and index keys scanned to fulfill a query
</p>
</li>
</ul>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Explain plan results for queries are subject to change between
MongoDB versions.
</p>
</div>
</div>
<div aria-hidden="true">
</div>
<div class="leafygreen-ui-1b75luy" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-4">
<div aria-label="Tabs to describe usage of drivers" aria-orientation="horizontal" class="leafygreen-ui-m8p1vb lg-ui-tab-list-0000" data-lgid="lg-tabs-tab_list" role="tablist">
<button aria-controls="_biok5wwyo" aria-selected="true" class="leafygreen-ui-1l773z1" data-text="" id="_q60i0n77n" name="" role="tab" tabindex="0">
<div class="leafygreen-ui-1nxuzmg">
MongoDB Shell
</div>
</button>
<button aria-controls="_4bfdjsfac" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_e9dlu5hf1" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Compass
</div>
</button>
</div>
<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
</div>
</div>
<div class="lg-ui-tab-panels-0000" data-lgid="lg-tabs-tab_panels">
<div>
<div aria-labelledby="_ulm12jji3" class="" id="_tdivfbcqh" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.explain/#mongodb-method-cursor.explain">
<code class="leafygreen-ui-1l06pbn">
cursor.explain("executionStats")
</code>
</a>
and the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.explain/#mongodb-method-db.collection.explain">
<code class="leafygreen-ui-1l06pbn">
db.collection.explain("executionStats")
</code>
</a>
methods provide statistics about
the performance of a query. These statistics can be useful in
measuring if and how a query uses an index. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.explain/#mongodb-method-db.collection.explain">
<code class="leafygreen-ui-1l06pbn">
db.collection.explain()
</code>
</a>
for details.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_iydtyb0pf" class="leafygreen-ui-38lglc" id="_q77vcb10m" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
MongoDB Compass
<!-- -->
provides an
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/compass/current/query-plan/" target="_self">
<span>
Explain Plan
</span>
</a>
tab, which
displays statistics about the performance of a query. These statistics
can be useful in measuring if and how a query uses an index.
</p>
</div>
</div>
</div>
</div>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Evaluate the Performance of a Query
<a class="headerlink leafygreen-ui-1kepx47" href="#evaluate-the-performance-of-a-query" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="evaluate-the-performance-of-a-query">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Consider a collection
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"item\" : \"f1\", type: \"food\", quantity: 500 }\n{ \"_id\" : 2, \"item\" : \"f2\", type: \"food\", quantity: 100 }\n{ \"_id\" : 3, \"item\" : \"p1\", type: \"paper\", quantity: 200 }\n{ \"_id\" : 4, \"item\" : \"p2\", type: \"paper\", quantity: 150 }\n{ \"_id\" : 5, \"item\" : \"f3\", type: \"food\", quantity: 300 }\n{ \"_id\" : 6, \"item\" : \"t1\", type: \"toys\", quantity: 500 }\n{ \"_id\" : 7, \"item\" : \"a1\", type: \"apparel\", quantity: 250 }\n{ \"_id\" : 8, \"item\" : \"a2\", type: \"apparel\", quantity: 400 }\n{ \"_id\" : 9, \"item\" : \"t2\", type: \"toys\", quantity: 50 }\n{ \"_id\" : 10, \"item\" : \"f4\", type: \"food\", quantity: 75 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"f1"</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"food"</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">500</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"f2"</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"food"</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">100</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"p1"</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"paper"</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">200</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"p2"</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"paper"</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">150</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"f3"</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"food"</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">300</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"t1"</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"toys"</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">500</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">7</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"a1"</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"apparel"</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">250</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">8</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"a2"</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"apparel"</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">400</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">9</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"t2"</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"toys"</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">50</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"f4"</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"food"</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">75</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div aria-hidden="true">
</div>
<div class="leafygreen-ui-f2qztv" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-6">
<div aria-label="Tabs to describe usage of drivers" aria-orientation="horizontal" class="leafygreen-ui-m8p1vb lg-ui-tab-list-0000" data-lgid="lg-tabs-tab_list" role="tablist">
<button aria-controls="_4yj94ke55" aria-selected="true" class="leafygreen-ui-1l773z1" data-text="" id="_oigkvdf07" name="" role="tab" tabindex="0">
<div class="leafygreen-ui-1nxuzmg">
MongoDB Shell
</div>
</button>
<button aria-controls="_dpsq9d97e" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_pkfsyhwbt" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Compass
</div>
</button>
</div>
<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
</div>
</div>
<div class="lg-ui-tab-panels-0000" data-lgid="lg-tabs-tab_panels">
<div>
<div aria-labelledby="_wgkk9kxxi" class="" id="_u7hfket3q" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
</div>
</div>
</div>
<div>
<div aria-labelledby="_1p4a4ot77" class="leafygreen-ui-38lglc" id="_6j8c3s8xb" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
The documents appear in
<!-- -->
MongoDB Compass
<!-- -->
as the following:
</p>
<div class="figure css-5vkxs0" style="width:auto">
<div class="gatsby-image-wrapper gatsby-image-wrapper-constrained leafygreen-ui-12xaq6r" data-gatsby-image-wrapper="">
<div style="max-width:789px;display:block">
<img alt="" aria-hidden="true" role="presentation" src="data:image/svg+xml;charset=utf-8,%3Csvg%20height='514'%20width='789'%20xmlns='http://www.w3.org/2000/svg'%20version='1.1'%3E%3C/svg%3E" style="max-width:100%;display:block;position:static"/>
</div>
<div aria-hidden="true" data-placeholder-image="" style="opacity:1;transition:opacity 500ms linear">
</div>
<img alt="Compass Inventory collection documents" data-main-image="" decoding="async" height="514" loading="lazy" sizes="(min-width: 789px) 789px, 100vw" src="/docs/manual/static/9e736bdc6e60ea51abab36238c8aaa3c/8c6de/compass-analyze-inventory-docs.webp" srcset="/docs/manual/static/9e736bdc6e60ea51abab36238c8aaa3c/7224d/compass-analyze-inventory-docs.webp 197w,/docs/manual/static/9e736bdc6e60ea51abab36238c8aaa3c/89620/compass-analyze-inventory-docs.webp 395w,/docs/manual/static/9e736bdc6e60ea51abab36238c8aaa3c/8c6de/compass-analyze-inventory-docs.webp 789w" style="--border-color:#C1C7C6;opacity:0" width="789"/>
<noscript>
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</noscript>
<script type="module">
const t="undefined"!=typeof HTMLImageElement&&"loading"in HTMLImageElement.prototype;if(t){const t=document.querySelectorAll("img[data-main-image]");for(let e of t){e.dataset.src&&(e.setAttribute("src",e.dataset.src),e.removeAttribute("data-src")),e.dataset.srcset&&(e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset"));const t=e.parentNode.querySelectorAll("source[data-srcset]");for(let e of t)e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset");e.complete&&(e.style.opacity=1,e.parentNode.parentNode.querySelector("[data-placeholder-image]").style.opacity=0)}}
</script>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-analyze-no-index">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Query with No Index
<a class="headerlink leafygreen-ui-1kepx47" href="#query-with-no-index" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="query-with-no-index">
</div>
</a>
</h3>
<div aria-hidden="true">
</div>
<div class="leafygreen-ui-1b75luy" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-10">
<div aria-label="Tabs to describe usage of drivers" aria-orientation="horizontal" class="leafygreen-ui-m8p1vb lg-ui-tab-list-0000" data-lgid="lg-tabs-tab_list" role="tablist">
<button aria-controls="_m0alxj32e" aria-selected="true" class="leafygreen-ui-1l773z1" data-text="" id="_o3liggxsb" name="" role="tab" tabindex="0">
<div class="leafygreen-ui-1nxuzmg">
MongoDB Shell
</div>
</button>
<button aria-controls="_k5coh67aw" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_6dfywyqu9" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Compass
</div>
</button>
</div>
<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
</div>
</div>
<div class="lg-ui-tab-panels-0000" data-lgid="lg-tabs-tab_panels">
<div>
<div aria-labelledby="_jo3p7lhxv" class="" id="_yzgswb5rz" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
The following query retrieves documents where the
<code class="leafygreen-ui-1l06pbn">
quantity
</code>
field has a value between
<code class="leafygreen-ui-1l06pbn">
100
</code>
and
<code class="leafygreen-ui-1l06pbn">
200
</code>
,
inclusive:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { quantity: { $gte: 100, $lte: 200 } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">quantity</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-attr">$lte</span>: <span class="lg-highlight-number">200</span> } } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The query returns the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 2, \"item\" : \"f2\", \"type\" : \"food\", \"quantity\" : 100 }\n{ \"_id\" : 3, \"item\" : \"p1\", \"type\" : \"paper\", \"quantity\" : 200 }\n{ \"_id\" : 4, \"item\" : \"p2\", \"type\" : \"paper\", \"quantity\" : 150 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"f2"</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"food"</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">100</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"p1"</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"paper"</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">200</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"p2"</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"paper"</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">150</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To view the query plan selected, chain the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.explain/#mongodb-method-cursor.explain">
<code class="leafygreen-ui-1l06pbn">
cursor.explain("executionStats")
</code>
</a>
cursor method to the end of the
<strong>
find
</strong>
command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find(\n { quantity: { $gte: 100, $lte: 200 } }\n).explain(\"executionStats\")","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">quantity</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-attr">$lte</span>: <span class="lg-highlight-number">200</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">).<span class="lg-highlight-title lg-highlight-function">explain</span>(<span class="lg-highlight-string">"executionStats"</span>)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.explain/#mongodb-method-cursor.explain">
<code class="leafygreen-ui-1l06pbn">
explain()
</code>
</a>
returns the following results:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n queryPlanner: {\n ...\n winningPlan: {\n queryPlan: {\n stage: 'COLLSCAN',\n ...\n }\n }\n },\n executionStats: {\n executionSuccess: true,\n nReturned: 3,\n executionTimeMillis: 0,\n totalKeysExamined: 0,\n totalDocsExamined: 10,\n executionStages: {\n stage: 'COLLSCAN',\n ...\n },\n ...\n },\n ...\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryPlanner</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">winningPlan</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryPlan</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">stage</span>: <span class="lg-highlight-string">'COLLSCAN'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">executionStats</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">executionSuccess</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">nReturned</span>: <span class="lg-highlight-number">3</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">executionTimeMillis</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">totalKeysExamined</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">totalDocsExamined</span>: <span class="lg-highlight-number">10</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">executionStages</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">stage</span>: <span class="lg-highlight-string">'COLLSCAN'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.queryPlanner.winningPlan.queryPlan.stage">
<code class="leafygreen-ui-1l06pbn">
queryPlanner.winningPlan.queryPlan.stage
</code>
</a>
displays
<code class="leafygreen-ui-1l06pbn">
COLLSCAN
</code>
to indicate a collection scan.
</p>
<p class="leafygreen-ui-1kp3ins">
Collection scans indicate that the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
had to scan the entire collection
document by document to identify the results. This is a
generally expensive operation and can result in slow
queries.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.executionStats.nReturned">
<code class="leafygreen-ui-1l06pbn">
executionStats.nReturned
</code>
</a>
displays
<code class="leafygreen-ui-1l06pbn">
3
</code>
to
indicate that the winning query plan returns three documents.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.executionStats.totalKeysExamined">
<code class="leafygreen-ui-1l06pbn">
executionStats.totalKeysExamined
</code>
</a>
displays
<code class="leafygreen-ui-1l06pbn">
0
</code>
to indicate that this is query is not using an index.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.executionStats.totalDocsExamined">
<code class="leafygreen-ui-1l06pbn">
executionStats.totalDocsExamined
</code>
</a>
displays
<code class="leafygreen-ui-1l06pbn">
10
</code>
to indicate that MongoDB had to scan ten documents (i.e.
all documents in the collection) to find the three matching
documents.
</p>
</li>
</ul>
</div>
</div>
</div>
<div>
<div aria-labelledby="_3fbe1l98g" class="leafygreen-ui-38lglc" id="_8sz3bbs9c" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
The following query retrieves documents where the
<code class="leafygreen-ui-1l06pbn">
quantity
</code>
field has a value between
<code class="leafygreen-ui-1l06pbn">
100
</code>
and
<code class="leafygreen-ui-1l06pbn">
200
</code>
,
inclusive:
</p>
<p class="leafygreen-ui-1kp3ins">
Copy the following filter into the Compass query bar and click
<span class="guilabel css-h15tq0">
Find
</span>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ quantity: { $gte: 100, $lte: 200 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">quantity</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-attr">$lte</span>: <span class="lg-highlight-number">200</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The query returns the following documents:
</p>
<p class="leafygreen-ui-1kp3ins">
To view the query plan selected:
</p>
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click the
<span class="guilabel css-h15tq0">
Explain Plan
</span>
tab for the
<code class="leafygreen-ui-1l06pbn">
test.inventory
</code>
collection.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Explain
</span>
.
</p>
</li>
</ol>
<p class="leafygreen-ui-1kp3ins">
MongoDB Compass
<!-- -->
displays the query plan as follows:
</p>
<div class="figure css-5vkxs0" style="width:auto">
<div class="gatsby-image-wrapper gatsby-image-wrapper-constrained leafygreen-ui-12xaq6r" data-gatsby-image-wrapper="">
<div style="max-width:788px;display:block">
<img alt="" aria-hidden="true" role="presentation" src="data:image/svg+xml;charset=utf-8,%3Csvg%20height='534'%20width='788'%20xmlns='http://www.w3.org/2000/svg'%20version='1.1'%3E%3C/svg%3E" style="max-width:100%;display:block;position:static"/>
</div>
<div aria-hidden="true" data-placeholder-image="" style="opacity:1;transition:opacity 500ms linear">
</div>
<img alt="Compass no index query plan" data-main-image="" decoding="async" height="534" loading="lazy" sizes="(min-width: 788px) 788px, 100vw" src="/docs/manual/static/b21ba048cdd5eeb4b5be1f0df812b661/95e2e/compass-explain-plan-no-index.webp" srcset="/docs/manual/static/b21ba048cdd5eeb4b5be1f0df812b661/d3780/compass-explain-plan-no-index.webp 197w,/docs/manual/static/b21ba048cdd5eeb4b5be1f0df812b661/94ff6/compass-explain-plan-no-index.webp 394w,/docs/manual/static/b21ba048cdd5eeb4b5be1f0df812b661/95e2e/compass-explain-plan-no-index.webp 788w" style="--border-color:#C1C7C6;opacity:0" width="788"/>
<noscript>
<img alt="Compass no index query plan" data-gatsby-image-ssr="" data-main-image="" decoding="async" height="534" loading="lazy" sizes="(min-width: 788px) 788px, 100vw" src="/docs/manual/static/b21ba048cdd5eeb4b5be1f0df812b661/95e2e/compass-explain-plan-no-index.webp" srcset="/docs/manual/static/b21ba048cdd5eeb4b5be1f0df812b661/d3780/compass-explain-plan-no-index.webp 197w,/docs/manual/static/b21ba048cdd5eeb4b5be1f0df812b661/94ff6/compass-explain-plan-no-index.webp 394w,/docs/manual/static/b21ba048cdd5eeb4b5be1f0df812b661/95e2e/compass-explain-plan-no-index.webp 788w" style="--border-color:#C1C7C6;opacity:0" width="788"/>
</noscript>
<script type="module">
const t="undefined"!=typeof HTMLImageElement&&"loading"in HTMLImageElement.prototype;if(t){const t=document.querySelectorAll("img[data-main-image]");for(let e of t){e.dataset.src&&(e.setAttribute("src",e.dataset.src),e.removeAttribute("data-src")),e.dataset.srcset&&(e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset"));const t=e.parentNode.querySelectorAll("source[data-srcset]");for(let e of t)e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset");e.complete&&(e.style.opacity=1,e.parentNode.parentNode.querySelector("[data-placeholder-image]").style.opacity=0)}}
</script>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Because we are working with such a small dataset for the
purposes of this tutorial, the
<span class="guilabel css-h15tq0">
Actual Query Execution Time
</span>
displays
<code class="leafygreen-ui-1l06pbn">
0
</code>
seconds, even though we are not using an index.
</p>
<p class="leafygreen-ui-1kp3ins">
In a larger dataset, the difference in query
execution time between an indexed query versus a
non-indexed query would be much more substantial.
</p>
</div>
</div>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Visual Tree
<a class="headerlink leafygreen-ui-1kepx47" href="#visual-tree" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="visual-tree">
</div>
</a>
</h4>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<span class="guilabel css-h15tq0">
Query Performance Summary
</span>
shows the
execution stats of the query:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<span class="guilabel css-h15tq0">
Documents Returned
</span>
displays
<code class="leafygreen-ui-1l06pbn">
3
</code>
to indicate
that the winning query plan returns three documents.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<span class="guilabel css-h15tq0">
Index Keys Examined
</span>
displays
<code class="leafygreen-ui-1l06pbn">
0
</code>
to
indicate that this query is not using an index.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<span class="guilabel css-h15tq0">
Documents Examined
</span>
displays
<code class="leafygreen-ui-1l06pbn">
10
</code>
to indicate
that MongoDB had to scan ten documents (i.e. all documents
in the collection) to find the three matching documents.
</p>
</li>
</ul>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Below the
<span class="guilabel css-h15tq0">
Query Performance Summary
</span>
,
<!-- -->
MongoDB Compass
<!-- -->
displays the
<code class="leafygreen-ui-1l06pbn">
COLLSCAN
</code>
query stage to indicate that a
collection scan was used for this query.
</p>
<p class="leafygreen-ui-1kp3ins">
Collection scans indicate that the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
had to scan the entire collection
document by document to identify the results. This is a
generally expensive operation and can result in slow
queries.
</p>
</li>
</ul>
</section>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Raw JSON
<a class="headerlink leafygreen-ui-1kepx47" href="#raw-json" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="raw-json">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
The explain details can also be viewed in raw JSON format by
clicking
<span class="guilabel css-h15tq0">
Raw JSON
</span>
below the query bar:
</p>
<div class="figure css-5vkxs0" style="width:auto">
<div class="gatsby-image-wrapper gatsby-image-wrapper-constrained leafygreen-ui-12xaq6r" data-gatsby-image-wrapper="">
<div style="max-width:752px;display:block">
<img alt="" aria-hidden="true" role="presentation" src="data:image/svg+xml;charset=utf-8,%3Csvg%20height='660'%20width='752'%20xmlns='http://www.w3.org/2000/svg'%20version='1.1'%3E%3C/svg%3E" style="max-width:100%;display:block;position:static"/>
</div>
<div aria-hidden="true" data-placeholder-image="" style="opacity:1;transition:opacity 500ms linear">
</div>
<img alt="Compass no index query plan raw JSON" data-main-image="" decoding="async" height="660" loading="lazy" sizes="(min-width: 752px) 752px, 100vw" src="/docs/manual/static/27bc34b4eccf7c2c8294f3a372d63049/7a331/compass-explain-plan-no-index-raw-json.webp" srcset="/docs/manual/static/27bc34b4eccf7c2c8294f3a372d63049/bed6e/compass-explain-plan-no-index-raw-json.webp 188w,/docs/manual/static/27bc34b4eccf7c2c8294f3a372d63049/19a9f/compass-explain-plan-no-index-raw-json.webp 376w,/docs/manual/static/27bc34b4eccf7c2c8294f3a372d63049/7a331/compass-explain-plan-no-index-raw-json.webp 752w" style="--border-color:#C1C7C6;opacity:0" width="752"/>
<noscript>
<img alt="Compass no index query plan raw JSON" data-gatsby-image-ssr="" data-main-image="" decoding="async" height="660" loading="lazy" sizes="(min-width: 752px) 752px, 100vw" src="/docs/manual/static/27bc34b4eccf7c2c8294f3a372d63049/7a331/compass-explain-plan-no-index-raw-json.webp" srcset="/docs/manual/static/27bc34b4eccf7c2c8294f3a372d63049/bed6e/compass-explain-plan-no-index-raw-json.webp 188w,/docs/manual/static/27bc34b4eccf7c2c8294f3a372d63049/19a9f/compass-explain-plan-no-index-raw-json.webp 376w,/docs/manual/static/27bc34b4eccf7c2c8294f3a372d63049/7a331/compass-explain-plan-no-index-raw-json.webp 752w" style="--border-color:#C1C7C6;opacity:0" width="752"/>
</noscript>
<script type="module">
const t="undefined"!=typeof HTMLImageElement&&"loading"in HTMLImageElement.prototype;if(t){const t=document.querySelectorAll("img[data-main-image]");for(let e of t){e.dataset.src&&(e.setAttribute("src",e.dataset.src),e.removeAttribute("data-src")),e.dataset.srcset&&(e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset"));const t=e.parentNode.querySelectorAll("source[data-srcset]");for(let e of t)e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset");e.complete&&(e.style.opacity=1,e.parentNode.parentNode.querySelector("[data-placeholder-image]").style.opacity=0)}}
</script>
</div>
</div>
</section>
</div>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The difference between the number of matching documents and the number
of examined documents may suggest that, to improve efficiency, the
query might benefit from the use of an index.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-analyze-index">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Query with Index
<a class="headerlink leafygreen-ui-1kepx47" href="#query-with-index" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="query-with-index">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To support the query on the
<code class="leafygreen-ui-1l06pbn">
quantity
</code>
field, add an index on the
<code class="leafygreen-ui-1l06pbn">
quantity
</code>
field:
</p>
<div aria-hidden="true">
</div>
<div class="leafygreen-ui-1b75luy" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-14">
<div aria-label="Tabs to describe usage of drivers" aria-orientation="horizontal" class="leafygreen-ui-m8p1vb lg-ui-tab-list-0000" data-lgid="lg-tabs-tab_list" role="tablist">
<button aria-controls="_xu4bic03t" aria-selected="true" class="leafygreen-ui-1l773z1" data-text="" id="_qbjsyitja" name="" role="tab" tabindex="0">
<div class="leafygreen-ui-1nxuzmg">
MongoDB Shell
</div>
</button>
<button aria-controls="_8ebg3n2ov" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_jc6ynl50f" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Compass
</div>
</button>
</div>
<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
</div>
</div>
<div class="lg-ui-tab-panels-0000" data-lgid="lg-tabs-tab_panels">
<div>
<div aria-labelledby="_hls2p84hv" class="" id="_7ko0kk3xo" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.createIndex( { quantity: 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">createIndex</span>( <!-- -->{ <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To view the query plan statistics, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.explain/#mongodb-method-cursor.explain">
<code class="leafygreen-ui-1l06pbn">
explain()
</code>
</a>
method:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find(\n { quantity: { $gte: 100, $lte: 200 } }\n).explain(\"executionStats\")","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">quantity</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-attr">$lte</span>: <span class="lg-highlight-number">200</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">).<span class="lg-highlight-title lg-highlight-function">explain</span>(<span class="lg-highlight-string">"executionStats"</span>)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.explain/#mongodb-method-cursor.explain">
<code class="leafygreen-ui-1l06pbn">
explain()
</code>
</a>
method returns the following
results:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n queryPlanner: {\n ...\n winningPlan: {\n queryPlan: {\n stage: 'FETCH',\n inputStage: {\n stage: 'IXSCAN',\n keyPattern: {\n quantity: 1\n },\n ...\n }\n }\n },\n rejectedPlans: [ ]\n },\n executionStats: {\n executionSuccess: true,\n nReturned: 3,\n executionTimeMillis: 0,\n totalKeysExamined: 3,\n totalDocsExamined: 3,\n executionStages: {\n ...\n },\n ...\n },\n ...\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryPlanner</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">winningPlan</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryPlan</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">stage</span>: <span class="lg-highlight-string">'FETCH'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">inputStage</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">stage</span>: <span class="lg-highlight-string">'IXSCAN'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">keyPattern</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">1</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">rejectedPlans</span>: <!-- -->[ <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">executionStats</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">executionSuccess</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">nReturned</span>: <span class="lg-highlight-number">3</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">executionTimeMillis</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">totalKeysExamined</span>: <span class="lg-highlight-number">3</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">totalDocsExamined</span>: <span class="lg-highlight-number">3</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">executionStages</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.queryPlanner.winningPlan.queryPlan.inputStage">
<code class="leafygreen-ui-1l06pbn">
queryPlanner.winningPlan.queryPlan.inputStage.stage
</code>
</a>
displays
<code class="leafygreen-ui-1l06pbn">
IXSCAN
</code>
to indicate index use.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.executionStats.nReturned">
<code class="leafygreen-ui-1l06pbn">
executionStats.nReturned
</code>
</a>
displays
<code class="leafygreen-ui-1l06pbn">
3
</code>
to indicate that the winning query plan returns
three documents.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.executionStats.totalKeysExamined">
<code class="leafygreen-ui-1l06pbn">
executionStats.totalKeysExamined
</code>
</a>
displays
<code class="leafygreen-ui-1l06pbn">
3
</code>
to indicate that MongoDB scanned three index entries. The
number of keys examined match the number of documents
returned, meaning that the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
only had
to examine index keys to return the results. The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
did not have to scan all of the
documents, and only the three matching documents had to be
pulled into memory. This results in a very efficient query.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.executionStats.totalDocsExamined">
<code class="leafygreen-ui-1l06pbn">
executionStats.totalDocsExamined
</code>
</a>
display
<code class="leafygreen-ui-1l06pbn">
3
</code>
to indicate that MongoDB scanned three documents.
</p>
</li>
</ul>
</div>
</div>
</div>
<div>
<div aria-labelledby="_7ao73u4jw" class="leafygreen-ui-38lglc" id="_507axkhja" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click the
<span class="guilabel css-h15tq0">
Indexes
</span>
tab for the
<code class="leafygreen-ui-1l06pbn">
test.inventory
</code>
collection.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Create Index
</span>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Select
<code class="leafygreen-ui-1l06pbn">
quantity
</code>
from the
<span class="guilabel css-h15tq0">
Select a field name
</span>
dropdown.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Select
<code class="leafygreen-ui-1l06pbn">
1 (asc)
</code>
from the type dropdown.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Create
</span>
.
</p>
</li>
</ol>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Leaving the index name field blank causes
<!-- -->
MongoDB Compass
<!-- -->
to
create a default name for the index.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
You can now see your newly created index in the
<span class="guilabel css-h15tq0">
Indexes
</span>
tab:
</p>
<div class="figure css-5vkxs0" style="width:auto">
<div class="gatsby-image-wrapper gatsby-image-wrapper-constrained leafygreen-ui-12xaq6r" data-gatsby-image-wrapper="">
<div style="max-width:751px;display:block">
<img alt="" aria-hidden="true" role="presentation" src="data:image/svg+xml;charset=utf-8,%3Csvg%20height='331'%20width='751'%20xmlns='http://www.w3.org/2000/svg'%20version='1.1'%3E%3C/svg%3E" style="max-width:100%;display:block;position:static"/>
</div>
<div aria-hidden="true" data-placeholder-image="" style="opacity:1;transition:opacity 500ms linear">
</div>
<img alt="Compass show new index" data-main-image="" decoding="async" height="331" loading="lazy" sizes="(min-width: 751px) 751px, 100vw" src="/docs/manual/static/b9fbfac3b6d8bd2674a752c25c90636a/5556a/compass-show-new-index.webp" srcset="/docs/manual/static/b9fbfac3b6d8bd2674a752c25c90636a/caf85/compass-show-new-index.webp 188w,/docs/manual/static/b9fbfac3b6d8bd2674a752c25c90636a/b1d15/compass-show-new-index.webp 376w,/docs/manual/static/b9fbfac3b6d8bd2674a752c25c90636a/5556a/compass-show-new-index.webp 751w" style="--border-color:#C1C7C6;opacity:0" width="751"/>
<noscript>
<img alt="Compass show new index" data-gatsby-image-ssr="" data-main-image="" decoding="async" height="331" loading="lazy" sizes="(min-width: 751px) 751px, 100vw" src="/docs/manual/static/b9fbfac3b6d8bd2674a752c25c90636a/5556a/compass-show-new-index.webp" srcset="/docs/manual/static/b9fbfac3b6d8bd2674a752c25c90636a/caf85/compass-show-new-index.webp 188w,/docs/manual/static/b9fbfac3b6d8bd2674a752c25c90636a/b1d15/compass-show-new-index.webp 376w,/docs/manual/static/b9fbfac3b6d8bd2674a752c25c90636a/5556a/compass-show-new-index.webp 751w" style="--border-color:#C1C7C6;opacity:0" width="751"/>
</noscript>
<script type="module">
const t="undefined"!=typeof HTMLImageElement&&"loading"in HTMLImageElement.prototype;if(t){const t=document.querySelectorAll("img[data-main-image]");for(let e of t){e.dataset.src&&(e.setAttribute("src",e.dataset.src),e.removeAttribute("data-src")),e.dataset.srcset&&(e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset"));const t=e.parentNode.querySelectorAll("source[data-srcset]");for(let e of t)e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset");e.complete&&(e.style.opacity=1,e.parentNode.parentNode.querySelector("[data-placeholder-image]").style.opacity=0)}}
</script>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Return to the
<span class="guilabel css-h15tq0">
Explain Plan
</span>
tab for the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection and re-run the query from
the previous step:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ quantity: { $gte: 100, $lte: 200 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">quantity</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-attr">$lte</span>: <span class="lg-highlight-number">200</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
MongoDB Compass
<!-- -->
displays the query plan as follows:
</p>
<div class="figure css-5vkxs0" style="width:auto">
<div class="gatsby-image-wrapper gatsby-image-wrapper-constrained leafygreen-ui-12xaq6r" data-gatsby-image-wrapper="">
<div style="max-width:752px;display:block">
<img alt="" aria-hidden="true" role="presentation" src="data:image/svg+xml;charset=utf-8,%3Csvg%20height='755'%20width='752'%20xmlns='http://www.w3.org/2000/svg'%20version='1.1'%3E%3C/svg%3E" style="max-width:100%;display:block;position:static"/>
</div>
<div aria-hidden="true" data-placeholder-image="" style="opacity:1;transition:opacity 500ms linear">
</div>
<img alt="Compass explain plan with index" data-main-image="" decoding="async" height="755" loading="lazy" sizes="(min-width: 752px) 752px, 100vw" src="/docs/manual/static/ae973a0ce10711112f7eaab9a0405305/6efe0/compass-explain-plan-with-index.webp" srcset="/docs/manual/static/ae973a0ce10711112f7eaab9a0405305/d9534/compass-explain-plan-with-index.webp 188w,/docs/manual/static/ae973a0ce10711112f7eaab9a0405305/381c4/compass-explain-plan-with-index.webp 376w,/docs/manual/static/ae973a0ce10711112f7eaab9a0405305/6efe0/compass-explain-plan-with-index.webp 752w" style="--border-color:#C1C7C6;opacity:0" width="752"/>
<noscript>
<img alt="Compass explain plan with index" data-gatsby-image-ssr="" data-main-image="" decoding="async" height="755" loading="lazy" sizes="(min-width: 752px) 752px, 100vw" src="/docs/manual/static/ae973a0ce10711112f7eaab9a0405305/6efe0/compass-explain-plan-with-index.webp" srcset="/docs/manual/static/ae973a0ce10711112f7eaab9a0405305/d9534/compass-explain-plan-with-index.webp 188w,/docs/manual/static/ae973a0ce10711112f7eaab9a0405305/381c4/compass-explain-plan-with-index.webp 376w,/docs/manual/static/ae973a0ce10711112f7eaab9a0405305/6efe0/compass-explain-plan-with-index.webp 752w" style="--border-color:#C1C7C6;opacity:0" width="752"/>
</noscript>
<script type="module">
const t="undefined"!=typeof HTMLImageElement&&"loading"in HTMLImageElement.prototype;if(t){const t=document.querySelectorAll("img[data-main-image]");for(let e of t){e.dataset.src&&(e.setAttribute("src",e.dataset.src),e.removeAttribute("data-src")),e.dataset.srcset&&(e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset"));const t=e.parentNode.querySelectorAll("source[data-srcset]");for(let e of t)e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset");e.complete&&(e.style.opacity=1,e.parentNode.parentNode.querySelector("[data-placeholder-image]").style.opacity=0)}}
</script>
</div>
</div>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Visual Tree
<a class="headerlink leafygreen-ui-1kepx47" href="#visual-tree-1" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="visual-tree-1">
</div>
</a>
</h4>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<span class="guilabel css-h15tq0">
Query Performance Summary
</span>
shows the
execution stats of the query:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<span class="guilabel css-h15tq0">
Documents Returned
</span>
displays
<code class="leafygreen-ui-1l06pbn">
3
</code>
to indicate
that the winning query plan returns three documents.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<span class="guilabel css-h15tq0">
Index Keys Examined
</span>
displays
<code class="leafygreen-ui-1l06pbn">
3
</code>
to indicate that MongoDB scanned three index entries. The
number of keys examined match the number of documents
returned, meaning that the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
only had
to examine index keys to return the results. The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
did not have to scan all of the
documents, and only the three matching documents had to be
pulled into memory. This results in a very efficient
query.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<span class="guilabel css-h15tq0">
Documents Examined
</span>
displays
<code class="leafygreen-ui-1l06pbn">
3
</code>
to indicate
that MongoDB scanned three documents.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
On the right-hand side of the
<span class="guilabel css-h15tq0">
Query Performance Summary
</span>
,
<!-- -->
MongoDB Compass
<!-- -->
shows
that the query used the
<code class="leafygreen-ui-1l06pbn">
quantity
</code>
index.
</p>
</li>
</ul>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Below the
<span class="guilabel css-h15tq0">
Query Performance Summary
</span>
,
<!-- -->
MongoDB Compass
<!-- -->
displays the query stages
<code class="leafygreen-ui-1l06pbn">
FETCH
</code>
and
<code class="leafygreen-ui-1l06pbn">
IXSCAN
</code>
.
<code class="leafygreen-ui-1l06pbn">
IXSCAN
</code>
indicates that the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
used an index to satisfy the query
before executing the
<code class="leafygreen-ui-1l06pbn">
FETCH
</code>
stage and retrieving the
documents.
</p>
</li>
</ul>
</section>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Raw JSON
<a class="headerlink leafygreen-ui-1kepx47" href="#raw-json-1" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="raw-json-1">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
The explain details can also be viewed in raw JSON format by
clicking
<span class="guilabel css-h15tq0">
Raw JSON
</span>
below the query bar:
</p>
<div class="figure css-5vkxs0" style="width:auto">
<div class="gatsby-image-wrapper gatsby-image-wrapper-constrained leafygreen-ui-12xaq6r" data-gatsby-image-wrapper="">
<div style="max-width:752px;display:block">
<img alt="" aria-hidden="true" role="presentation" src="data:image/svg+xml;charset=utf-8,%3Csvg%20height='758'%20width='752'%20xmlns='http://www.w3.org/2000/svg'%20version='1.1'%3E%3C/svg%3E" style="max-width:100%;display:block;position:static"/>
</div>
<div aria-hidden="true" data-placeholder-image="" style="opacity:1;transition:opacity 500ms linear">
</div>
<img alt="Compass query plan with index raw JSON" data-main-image="" decoding="async" height="758" loading="lazy" sizes="(min-width: 752px) 752px, 100vw" src="/docs/manual/static/2c8a4e427e56e362c7a44797f8af8d33/d5d42/compass-explain-plan-with-index-raw-json.webp" srcset="/docs/manual/static/2c8a4e427e56e362c7a44797f8af8d33/6e3a0/compass-explain-plan-with-index-raw-json.webp 188w,/docs/manual/static/2c8a4e427e56e362c7a44797f8af8d33/2d44b/compass-explain-plan-with-index-raw-json.webp 376w,/docs/manual/static/2c8a4e427e56e362c7a44797f8af8d33/d5d42/compass-explain-plan-with-index-raw-json.webp 752w" style="--border-color:#C1C7C6;opacity:0" width="752"/>
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</div>
</div>
</section>
</div>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Without the index, the query would scan the whole collection of
<code class="leafygreen-ui-1l06pbn">
10
</code>
documents to return
<code class="leafygreen-ui-1l06pbn">
3
</code>
matching documents. The query also had to
scan the entirety of each document, potentially pulling them into
memory. This results in an expensive and potentially slow query
operation.
</p>
<p class="leafygreen-ui-1kp3ins">
When run with an index, the query scanned
<code class="leafygreen-ui-1l06pbn">
3
</code>
index entries
and
<code class="leafygreen-ui-1l06pbn">
3
</code>
documents to return
<code class="leafygreen-ui-1l06pbn">
3
</code>
matching documents, resulting
in a very efficient query.
</p>
<div aria-hidden="true">
</div>
<div class="leafygreen-ui-1b75luy" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-15">
<div aria-label="Tabs to describe usage of drivers" aria-orientation="horizontal" class="leafygreen-ui-m8p1vb lg-ui-tab-list-0000" data-lgid="lg-tabs-tab_list" role="tablist">
<button aria-controls="_hgan6fmm3" aria-selected="true" class="leafygreen-ui-1l773z1" data-text="" id="_kx8kxjre2" name="" role="tab" tabindex="0">
<div class="leafygreen-ui-1nxuzmg">
MongoDB Shell
</div>
</button>
<button aria-controls="_a6x5g3fui" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_h5o180m3o" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
Compass
</div>
</button>
</div>
<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
</div>
</div>
<div class="lg-ui-tab-panels-0000" data-lgid="lg-tabs-tab_panels">
<div>
<div aria-labelledby="_59cdyeqsb" class="" id="_e65ymqb9w" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<span class="leafygreen-ui-1qnjd6d" id="std-label-analyze-compare-performance">
</span>
</div>
</div>
</div>
<div>
<div aria-labelledby="_qtbzkvrbo" class="leafygreen-ui-38lglc" id="_5rfzgw3mc" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-optimization/#std-label-read-operations-indexing">
Query Optimization
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/compass/current/#std-label-compass-index" target="_self">
<span>
MongoDB Compass Documentation
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/compass/current/query-plan/" target="_self">
<span>
Compass Query Plan Documentation
</span>
</a>
</p>
</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/aggregation/max/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$max (aggregation)
<a class="headerlink leafygreen-ui-1kepx47" href="#-max--aggregation-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-max--aggregation-">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
<dl class="group">
<dt>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-group-grp.-max" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-group-grp.-max">
</div>
</a>
</dt>
<dd>
</dd>
</dl>
<p class="leafygreen-ui-1kp3ins">
Returns the maximum value.
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
compares both value and
type, using the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-type-comparison-order/#std-label-bson-types-comparison-order">
specified BSON comparison order
</a>
for values of different types.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
is available in these stages:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/addFields/#mongodb-pipeline-pipe.-addFields">
<code class="leafygreen-ui-1l06pbn">
$addFields
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/bucket/#mongodb-pipeline-pipe.-bucket">
<code class="leafygreen-ui-1l06pbn">
$bucket
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/bucketAuto/#mongodb-pipeline-pipe.-bucketAuto">
<code class="leafygreen-ui-1l06pbn">
$bucketAuto
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/match/#mongodb-pipeline-pipe.-match">
<code class="leafygreen-ui-1l06pbn">
$match
</code>
</a>
stage that includes an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/expr/#mongodb-query-op.-expr">
<code class="leafygreen-ui-1l06pbn">
$expr
</code>
</a>
expression
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/project/#mongodb-pipeline-pipe.-project">
<code class="leafygreen-ui-1l06pbn">
$project
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/replaceRoot/#mongodb-pipeline-pipe.-replaceRoot">
<code class="leafygreen-ui-1l06pbn">
$replaceRoot
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/replaceWith/#mongodb-pipeline-pipe.-replaceWith">
<code class="leafygreen-ui-1l06pbn">
$replaceWith
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/set/#mongodb-pipeline-pipe.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#mongodb-pipeline-pipe.-setWindowFields">
<code class="leafygreen-ui-1l06pbn">
$setWindowFields
</code>
</a>
(Available starting in MongoDB 5.0)
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
When used in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/bucket/#mongodb-pipeline-pipe.-bucket">
<code class="leafygreen-ui-1l06pbn">
$bucket
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/bucketAuto/#mongodb-pipeline-pipe.-bucketAuto">
<code class="leafygreen-ui-1l06pbn">
$bucketAuto
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#mongodb-pipeline-pipe.-setWindowFields">
<code class="leafygreen-ui-1l06pbn">
$setWindowFields
</code>
</a>
stages,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
has this syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $max: <expression> }"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ $max: <expression> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
When used in other supported stages,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
has one of two
syntaxes:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
has one specified expression as its operand:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $max: <expression> }"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ $max: <expression> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
has a list of specified expressions as its
operand:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $max: [ <expression1>, <expression2> ... ] }"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ $max: [ <expression1>, <expression2> ... ] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For more information on expressions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
Expression Operators
<!-- -->
.
</a>
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Result Type
<a class="headerlink leafygreen-ui-1kepx47" href="#result-type" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="result-type">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
$max
</code>
compares input data following the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-type-comparison-order/#std-label-bson-types-comparison-order">
BSON Comparison order
</a>
to
determine the appropriate output type. When the input data contains
multiple data types, the
<code class="leafygreen-ui-1l06pbn">
$max
</code>
output type is the
<!-- -->
highest
<!-- -->
in the comparison order.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Null or Missing Values
<a class="headerlink leafygreen-ui-1kepx47" href="#null-or-missing-values" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="null-or-missing-values">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If some,
<strong>
but not all
</strong>
, documents for the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
operation have either a
<code class="leafygreen-ui-1l06pbn">
null
</code>
value for the field or are
missing the field, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
operator only considers the
non-null and the non-missing values for the field.
</p>
<p class="leafygreen-ui-1kp3ins">
If
<strong>
all
</strong>
documents for the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
operation have
<code class="leafygreen-ui-1l06pbn">
null
</code>
value for the field or are missing the field, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
operator returns
<code class="leafygreen-ui-1l06pbn">
null
</code>
for the maximum value.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Array Operand
<a class="headerlink leafygreen-ui-1kepx47" href="#array-operand" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="array-operand">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
In the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#mongodb-pipeline-pipe.-setWindowFields">
<code class="leafygreen-ui-1l06pbn">
$setWindowFields
</code>
</a>
stages, if
the expression resolves to an array,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
does not traverse the
array and compares the array as a whole.
</p>
<p class="leafygreen-ui-1kp3ins">
In the other supported stages:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
With a single expression as its operand, if the expression resolves
to an array,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
traverses into the array to operate on the
numeric elements of the array to return a single value.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
With a list of expressions as its operand, if any of the expressions
resolves to an array,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
does
<strong>
not
</strong>
traverse into the
array but instead treats the array as a non-numeric value.
</p>
</li>
</ul>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Use in
<code class="leafygreen-ui-1l06pbn">
$group
</code>
Stage
<a class="headerlink leafygreen-ui-1kepx47" href="#use-in--group-stage" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="use-in--group-stage">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Consider a
<code class="leafygreen-ui-1l06pbn">
sales
</code>
collection with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"item\" : \"abc\", \"price\" : 10, \"quantity\" : 2, \"date\" : ISODate(\"2014-01-01T08:00:00Z\") }\n{ \"_id\" : 2, \"item\" : \"jkl\", \"price\" : 20, \"quantity\" : 1, \"date\" : ISODate(\"2014-02-03T09:00:00Z\") }\n{ \"_id\" : 3, \"item\" : \"xyz\", \"price\" : 5, \"quantity\" : 5, \"date\" : ISODate(\"2014-02-03T09:05:00Z\") }\n{ \"_id\" : 4, \"item\" : \"abc\", \"price\" : 10, \"quantity\" : 10, \"date\" : ISODate(\"2014-02-15T08:00:00Z\") }\n{ \"_id\" : 5, \"item\" : \"xyz\", \"price\" : 5, \"quantity\" : 10, \"date\" : ISODate(\"2014-02-15T09:05:00Z\") }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"abc"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"date"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2014-01-01T08:00:00Z"</span>) }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"jkl"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">20</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"date"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2014-02-03T09:00:00Z"</span>) }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"xyz"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"date"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2014-02-03T09:05:00Z"</span>) }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"abc"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-string">"date"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2014-02-15T08:00:00Z"</span>) }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"xyz"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-string">"date"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2014-02-15T09:05:00Z"</span>) }</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Grouping the documents by the
<code class="leafygreen-ui-1l06pbn">
item
</code>
field, the following operation
uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
accumulator to compute the maximum total amount and
maximum quantity for each group of documents.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.sales.aggregate(\n [\n {\n $group:\n {\n _id: \"$item\",\n maxTotalAmount: { $max: { $multiply: [ \"$price\", \"$quantity\" ] } },\n maxQuantity: { $max: \"$quantity\" }\n }\n }\n ]\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">sales</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$group</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-string">"$item"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">maxTotalAmount</span>: <!-- -->{ <span class="lg-highlight-attr">$max</span>: <!-- -->{ <span class="lg-highlight-attr">$multiply</span>: <!-- -->[ <span class="lg-highlight-string">"$price"</span>, <span class="lg-highlight-string">"$quantity"</span> ] } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">maxQuantity</span>: <!-- -->{ <span class="lg-highlight-attr">$max</span>: <span class="lg-highlight-string">"$quantity"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following results:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : \"xyz\", \"maxTotalAmount\" : 50, \"maxQuantity\" : 10 }\n{ \"_id\" : \"jkl\", \"maxTotalAmount\" : 20, \"maxQuantity\" : 1 }\n{ \"_id\" : \"abc\", \"maxTotalAmount\" : 100, \"maxQuantity\" : 10 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"xyz"</span>, <span class="lg-highlight-string">"maxTotalAmount"</span> <!-- -->: <span class="lg-highlight-number">50</span>, <span class="lg-highlight-string">"maxQuantity"</span> <!-- -->: <span class="lg-highlight-number">10</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"jkl"</span>, <span class="lg-highlight-string">"maxTotalAmount"</span> <!-- -->: <span class="lg-highlight-number">20</span>, <span class="lg-highlight-string">"maxQuantity"</span> <!-- -->: <span class="lg-highlight-number">1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"abc"</span>, <span class="lg-highlight-string">"maxTotalAmount"</span> <!-- -->: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-string">"maxQuantity"</span> <!-- -->: <span class="lg-highlight-number">10</span> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Use in
<code class="leafygreen-ui-1l06pbn">
$project
</code>
Stage
<a class="headerlink leafygreen-ui-1kepx47" href="#use-in--project-stage" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="use-in--project-stage">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
A collection
<code class="leafygreen-ui-1l06pbn">
students
</code>
contains the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\": 1, \"quizzes\": [ 10, 6, 7 ], \"labs\": [ 5, 8 ], \"final\": 80, \"midterm\": 75 }\n{ \"_id\": 2, \"quizzes\": [ 9, 10 ], \"labs\": [ 8, 8 ], \"final\": 95, \"midterm\": 80 }\n{ \"_id\": 3, \"quizzes\": [ 4, 5, 5 ], \"labs\": [ 6, 5 ], \"final\": 78, \"midterm\": 70 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"quizzes"</span>: <!-- -->[ <span class="lg-highlight-number">10</span>, <span class="lg-highlight-number">6</span>, <span class="lg-highlight-number">7</span> ]<!-- -->, <span class="lg-highlight-string">"labs"</span>: <!-- -->[ <span class="lg-highlight-number">5</span>, <span class="lg-highlight-number">8</span> ]<!-- -->, <span class="lg-highlight-string">"final"</span>: <span class="lg-highlight-number">80</span>, <span class="lg-highlight-string">"midterm"</span>: <span class="lg-highlight-number">75</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"quizzes"</span>: <!-- -->[ <span class="lg-highlight-number">9</span>, <span class="lg-highlight-number">10</span> ]<!-- -->, <span class="lg-highlight-string">"labs"</span>: <!-- -->[ <span class="lg-highlight-number">8</span>, <span class="lg-highlight-number">8</span> ]<!-- -->, <span class="lg-highlight-string">"final"</span>: <span class="lg-highlight-number">95</span>, <span class="lg-highlight-string">"midterm"</span>: <span class="lg-highlight-number">80</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"quizzes"</span>: <!-- -->[ <span class="lg-highlight-number">4</span>, <span class="lg-highlight-number">5</span>, <span class="lg-highlight-number">5</span> ]<!-- -->, <span class="lg-highlight-string">"labs"</span>: <!-- -->[ <span class="lg-highlight-number">6</span>, <span class="lg-highlight-number">5</span> ]<!-- -->, <span class="lg-highlight-string">"final"</span>: <span class="lg-highlight-number">78</span>, <span class="lg-highlight-string">"midterm"</span>: <span class="lg-highlight-number">70</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following example uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/project/#mongodb-pipeline-pipe.-project">
<code class="leafygreen-ui-1l06pbn">
$project
</code>
</a>
stage to calculate the maximum quiz scores, the
maximum lab scores, and the maximum of the final and the midterm:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.students.aggregate([\n { $project: { quizMax: { $max: \"$quizzes\"}, labMax: { $max: \"$labs\" }, examMax: { $max: [ \"$final\", \"$midterm\" ] } } }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">students</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$project</span>: <!-- -->{ <span class="lg-highlight-attr">quizMax</span>: <!-- -->{ <span class="lg-highlight-attr">$max</span>: <span class="lg-highlight-string">"$quizzes"</span>}<!-- -->, <span class="lg-highlight-attr">labMax</span>: <!-- -->{ <span class="lg-highlight-attr">$max</span>: <span class="lg-highlight-string">"$labs"</span> }<!-- -->, <span class="lg-highlight-attr">examMax</span>: <!-- -->{ <span class="lg-highlight-attr">$max</span>: <!-- -->[ <span class="lg-highlight-string">"$final"</span>, <span class="lg-highlight-string">"$midterm"</span> ] } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation results in the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"quizMax\" : 10, \"labMax\" : 8, \"examMax\" : 80 }\n{ \"_id\" : 2, \"quizMax\" : 10, \"labMax\" : 8, \"examMax\" : 95 }\n{ \"_id\" : 3, \"quizMax\" : 5, \"labMax\" : 6, \"examMax\" : 78 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"quizMax"</span> <!-- -->: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-string">"labMax"</span> <!-- -->: <span class="lg-highlight-number">8</span>, <span class="lg-highlight-string">"examMax"</span> <!-- -->: <span class="lg-highlight-number">80</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"quizMax"</span> <!-- -->: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-string">"labMax"</span> <!-- -->: <span class="lg-highlight-number">8</span>, <span class="lg-highlight-string">"examMax"</span> <!-- -->: <span class="lg-highlight-number">95</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"quizMax"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"labMax"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"examMax"</span> <!-- -->: <span class="lg-highlight-number">78</span> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Use in
<code class="leafygreen-ui-1l06pbn">
$setWindowFields
</code>
Stage
<a class="headerlink leafygreen-ui-1kepx47" href="#use-in--setwindowfields-stage" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="use-in--setwindowfields-stage">
</div>
</a>
</h3>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
Create a
<code class="leafygreen-ui-1l06pbn">
cakeSales
</code>
collection that contains cake sales in the states
of California (
<code class="leafygreen-ui-1l06pbn">
CA
</code>
) and Washington (
<code class="leafygreen-ui-1l06pbn">
WA
</code>
):
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.cakeSales.insertMany( [\n { _id: 0, type: \"chocolate\", orderDate: new Date(\"2020-05-18T14:10:30Z\"),\n state: \"CA\", price: 13, quantity: 120 },\n { _id: 1, type: \"chocolate\", orderDate: new Date(\"2021-03-20T11:30:05Z\"),\n state: \"WA\", price: 14, quantity: 140 },\n { _id: 2, type: \"vanilla\", orderDate: new Date(\"2021-01-11T06:31:15Z\"),\n state: \"CA\", price: 12, quantity: 145 },\n { _id: 3, type: \"vanilla\", orderDate: new Date(\"2020-02-08T13:13:23Z\"),\n state: \"WA\", price: 13, quantity: 104 },\n { _id: 4, type: \"strawberry\", orderDate: new Date(\"2019-05-18T16:09:01Z\"),\n state: \"CA\", price: 41, quantity: 162 },\n { _id: 5, type: \"strawberry\", orderDate: new Date(\"2019-01-08T06:12:03Z\"),\n state: \"WA\", price: 43, quantity: 134 }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">cakeSales</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"chocolate"</span>, <span class="lg-highlight-attr">orderDate</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2020-05-18T14:10:30Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">state</span>: <span class="lg-highlight-string">"CA"</span>, <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">13</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">120</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"chocolate"</span>, <span class="lg-highlight-attr">orderDate</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2021-03-20T11:30:05Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">state</span>: <span class="lg-highlight-string">"WA"</span>, <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">14</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">140</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"vanilla"</span>, <span class="lg-highlight-attr">orderDate</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2021-01-11T06:31:15Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">state</span>: <span class="lg-highlight-string">"CA"</span>, <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">12</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">145</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"vanilla"</span>, <span class="lg-highlight-attr">orderDate</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2020-02-08T13:13:23Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">state</span>: <span class="lg-highlight-string">"WA"</span>, <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">13</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">104</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"strawberry"</span>, <span class="lg-highlight-attr">orderDate</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2019-05-18T16:09:01Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">state</span>: <span class="lg-highlight-string">"CA"</span>, <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">41</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">162</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"strawberry"</span>, <span class="lg-highlight-attr">orderDate</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2019-01-08T06:12:03Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">state</span>: <span class="lg-highlight-string">"WA"</span>, <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">43</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">134</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
This example uses
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#mongodb-pipeline-pipe.-setWindowFields">
<code class="leafygreen-ui-1l06pbn">
$setWindowFields
</code>
</a>
stage to output the maximum
<code class="leafygreen-ui-1l06pbn">
quantity
</code>
of cake sales for each
<code class="leafygreen-ui-1l06pbn">
state
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.cakeSales.aggregate( [\n {\n $setWindowFields: {\n partitionBy: \"$state\",\n sortBy: { orderDate: 1 },\n output: {\n maximumQuantityForState: {\n $max: \"$quantity\",\n window: {\n documents: [ \"unbounded\", \"current\" ]\n }\n }\n }\n }\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">cakeSales</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$setWindowFields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">partitionBy</span>: <span class="lg-highlight-string">"$state"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">sortBy</span>: <!-- -->{ <span class="lg-highlight-attr">orderDate</span>: <span class="lg-highlight-number">1</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">output</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">maximumQuantityForState</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$max</span>: <span class="lg-highlight-string">"$quantity"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">window</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">documents</span>: <!-- -->[ <span class="lg-highlight-string">"unbounded"</span>, <span class="lg-highlight-string">"current"</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
In the example:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
partitionBy: "$state"
</code>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-partitionBy">
partitions
</a>
the documents in the collection by
<code class="leafygreen-ui-1l06pbn">
state
</code>
. There are partitions for
<code class="leafygreen-ui-1l06pbn">
CA
</code>
and
<code class="leafygreen-ui-1l06pbn">
WA
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
sortBy: { orderDate: 1 }
</code>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-sortBy">
sorts
</a>
the documents in each partition by
<code class="leafygreen-ui-1l06pbn">
orderDate
</code>
in ascending order (
<code class="leafygreen-ui-1l06pbn">
1
</code>
), so the earliest
<code class="leafygreen-ui-1l06pbn">
orderDate
</code>
is first.
</p>
</li>
</ul>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
output
</code>
sets the
<code class="leafygreen-ui-1l06pbn">
maximumQuantityForState
</code>
field to the maximum
<code class="leafygreen-ui-1l06pbn">
quantity
</code>
value using
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
that is run in a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-documents">
documents
</a>
window.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-window">
window
</a>
contains documents between
an
<code class="leafygreen-ui-1l06pbn">
unbounded
</code>
lower limit and the
<code class="leafygreen-ui-1l06pbn">
current
</code>
document in the
output. This means
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-max" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</span>
</a>
returns the maximum
<code class="leafygreen-ui-1l06pbn">
quantity
</code>
for the documents between the beginning of the partition
and the current document.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
In this output, the maximum
<code class="leafygreen-ui-1l06pbn">
quantity
</code>
for
<code class="leafygreen-ui-1l06pbn">
CA
</code>
and
<code class="leafygreen-ui-1l06pbn">
WA
</code>
is shown
in the
<code class="leafygreen-ui-1l06pbn">
maximumQuantityForState
</code>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 4, \"type\" : \"strawberry\", \"orderDate\" : ISODate(\"2019-05-18T16:09:01Z\"),\n \"state\" : \"CA\", \"price\" : 41, \"quantity\" : 162, \"maximumQuantityForState\" : 162 }\n{ \"_id\" : 0, \"type\" : \"chocolate\", \"orderDate\" : ISODate(\"2020-05-18T14:10:30Z\"),\n \"state\" : \"CA\", \"price\" : 13, \"quantity\" : 120, \"maximumQuantityForState\" : 162 }\n{ \"_id\" : 2, \"type\" : \"vanilla\", \"orderDate\" : ISODate(\"2021-01-11T06:31:15Z\"),\n \"state\" : \"CA\", \"price\" : 12, \"quantity\" : 145, \"maximumQuantityForState\" : 162 }\n{ \"_id\" : 5, \"type\" : \"strawberry\", \"orderDate\" : ISODate(\"2019-01-08T06:12:03Z\"),\n \"state\" : \"WA\", \"price\" : 43, \"quantity\" : 134, \"maximumQuantityForState\" : 134 }\n{ \"_id\" : 3, \"type\" : \"vanilla\", \"orderDate\" : ISODate(\"2020-02-08T13:13:23Z\"),\n \"state\" : \"WA\", \"price\" : 13, \"quantity\" : 104, \"maximumQuantityForState\" : 134 }\n{ \"_id\" : 1, \"type\" : \"chocolate\", \"orderDate\" : ISODate(\"2021-03-20T11:30:05Z\"),\n \"state\" : \"WA\", \"price\" : 14, \"quantity\" : 140, \"maximumQuantityForState\" : 140 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"strawberry"</span>, <span class="lg-highlight-string">"orderDate"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2019-05-18T16:09:01Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"state"</span> <!-- -->: <span class="lg-highlight-string">"CA"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">41</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">162</span>, <span class="lg-highlight-string">"maximumQuantityForState"</span> <!-- -->: <span class="lg-highlight-number">162</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"chocolate"</span>, <span class="lg-highlight-string">"orderDate"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2020-05-18T14:10:30Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"state"</span> <!-- -->: <span class="lg-highlight-string">"CA"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">13</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">120</span>, <span class="lg-highlight-string">"maximumQuantityForState"</span> <!-- -->: <span class="lg-highlight-number">162</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"vanilla"</span>, <span class="lg-highlight-string">"orderDate"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2021-01-11T06:31:15Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"state"</span> <!-- -->: <span class="lg-highlight-string">"CA"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">12</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">145</span>, <span class="lg-highlight-string">"maximumQuantityForState"</span> <!-- -->: <span class="lg-highlight-number">162</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"strawberry"</span>, <span class="lg-highlight-string">"orderDate"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2019-01-08T06:12:03Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"state"</span> <!-- -->: <span class="lg-highlight-string">"WA"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">43</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">134</span>, <span class="lg-highlight-string">"maximumQuantityForState"</span> <!-- -->: <span class="lg-highlight-number">134</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"vanilla"</span>, <span class="lg-highlight-string">"orderDate"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2020-02-08T13:13:23Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"state"</span> <!-- -->: <span class="lg-highlight-string">"WA"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">13</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">104</span>, <span class="lg-highlight-string">"maximumQuantityForState"</span> <!-- -->: <span class="lg-highlight-number">134</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"chocolate"</span>, <span class="lg-highlight-string">"orderDate"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2021-03-20T11:30:05Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"state"</span> <!-- -->: <span class="lg-highlight-string">"WA"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">14</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">140</span>, <span class="lg-highlight-string">"maximumQuantityForState"</span> <!-- -->: <span class="lg-highlight-number">140</span> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/indexes/index-types/geospatial/2dsphere/query/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Query a 2dsphere Index
<a class="headerlink leafygreen-ui-1kepx47" href="#query-a-2dsphere-index" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="query-a-2dsphere-index">
</div>
</a>
</h1>
<p class="leafygreen-ui-1kp3ins">
2dsphere indexes let you query and perform calculations on location data
on a sphere. For examples of queries using 2dsphere indexes, see:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2dsphere/query/geojson-bound-by-polygon/#std-label-2dsphere-query-geojson-objects-polygon">
Query for Locations Bound by a Polygon
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2dsphere/query/proximity-to-geojson/#std-label-2dsphere-query-geojson-proximity">
Query for Locations Near a Point on a Sphere
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2dsphere/query/intersections-of-geojson-objects/#std-label-2dsphere-query-intersection">
Query for Locations that Intersect a GeoJSON Object
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2dsphere/query/points-within-circle-on-sphere/#std-label-2dsphere-query-points-within-circle-on-sphere">
Query for Locations within a Circle on a Sphere
</a>
</p>
</li>
</ul>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/aggregation/atan/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$atan (aggregation)
<a class="headerlink leafygreen-ui-1kepx47" href="#-atan--aggregation-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-atan--aggregation-">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<dl class="expression">
<dt>
<code class="leafygreen-ui-1l06pbn">
$atan
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-expression-exp.-atan" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-expression-exp.-atan">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Returns the inverse tangent (arc tangent) of a value.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-atan" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$atan
</code>
</span>
</a>
has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $atan: <expression> }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$atan</span>: <<!-- -->expression<!-- -->> <!-- -->}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-atan" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$atan
</code>
</span>
</a>
takes any valid
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
that resolves to a number.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-atan" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$atan
</code>
</span>
</a>
returns values in radians. Use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/radiansToDegrees/#mongodb-expression-exp.-radiansToDegrees">
<code class="leafygreen-ui-1l06pbn">
$radiansToDegrees
</code>
</a>
operator to convert the output value
from radians to degrees.
</p>
<p class="leafygreen-ui-1kp3ins">
By default
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-atan" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$atan
</code>
</span>
</a>
returns values as a
<code class="leafygreen-ui-1l06pbn">
double
</code>
.
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-atan" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$atan
</code>
</span>
</a>
can also return values as a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/reference/data-types/#std-label-shell-type-decimal" target="_self">
<span>
128-bit decimal
</span>
</a>
as long as the
<code class="leafygreen-ui-1l06pbn">
<expression>
</code>
resolves to a 128-bit decimal value.
</p>
<p class="leafygreen-ui-1kp3ins">
For more information on expressions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
Expression Operators
<!-- -->
.
</a>
</p>
</dd>
</dl>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
null
</code>
and
<code class="leafygreen-ui-1l06pbn">
NaN
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#null-and-nan" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="null-and-nan">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If the argument resolves to a value of
<code class="leafygreen-ui-1l06pbn">
null
</code>
or refers to a field
that is missing,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-atan" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$atan
</code>
</span>
</a>
returns
<code class="leafygreen-ui-1l06pbn">
null
</code>
. If the
argument resolves to
<code class="leafygreen-ui-1l06pbn">
NaN
</code>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/tan/#mongodb-expression-exp.-tan">
<code class="leafygreen-ui-1l06pbn">
$tan
</code>
</a>
returns
<code class="leafygreen-ui-1l06pbn">
NaN
</code>
.
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:85%"/>
<col style="width:15%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Example
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Results
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $atan: NaN }
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
NaN
</code>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $atan: null }
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
null
</code>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</h2>
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<div class="leafygreen-ui-1b75luy" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-8">
<div aria-label="Tabs to describe usage of degrees/radians" aria-orientation="horizontal" class="leafygreen-ui-m8p1vb lg-ui-tab-list-0000" data-lgid="lg-tabs-tab_list" role="tablist">
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Inverse Tangent of Value in Degrees
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Inverse Tangent of Value in Radians
</div>
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<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
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<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
trigonometry
</code>
collection contains a document that
stores three sides of a right-angle triangle:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : ObjectId(\"5c50782193f833234ba90d85\"),\n \"side_a\" : NumberDecimal(\"3\"),\n \"side_b\" : NumberDecimal(\"4\"),\n \"hypotenuse\" : NumberDecimal(\"5\")\n}","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> : ObjectId(<span class="lg-highlight-string">"5c50782193f833234ba90d85"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"side_a"</span> : NumberDecimal(<span class="lg-highlight-string">"3"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"side_b"</span> : NumberDecimal(<span class="lg-highlight-string">"4"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"hypotenuse"</span> : NumberDecimal(<span class="lg-highlight-string">"5"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following aggregation operation uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-atan" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$atan
</code>
</span>
</a>
expression to calculate the angle adjacent
to
<code class="leafygreen-ui-1l06pbn">
side_a
</code>
and add it to the input document using the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/addFields/#mongodb-pipeline-pipe.-addFields">
<code class="leafygreen-ui-1l06pbn">
$addFields
</code>
</a>
pipeline stage.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.trigonometry.aggregate([\n {\n $addFields : {\n \"angle_a\" : {\n $radiansToDegrees : {\n $atan : {\n $divide : [ \"$side_b\", \"$side_a\" ]\n }\n }\n }\n }\n }\n])","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.trigonometry.aggregate([</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-variable">$addFields</span> : {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"angle_a"</span> : {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-variable">$radiansToDegrees</span> : {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-variable">$atan</span> : {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-variable">$divide</span> : [ <span class="lg-highlight-string">"</span><span class="lg-highlight-variable lg-highlight-string">$side_b</span><span class="lg-highlight-string">"</span>, <span class="lg-highlight-string">"</span><span class="lg-highlight-variable lg-highlight-string">$side_a</span><span class="lg-highlight-string">"</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
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<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/radiansToDegrees/#mongodb-expression-exp.-radiansToDegrees">
<code class="leafygreen-ui-1l06pbn">
$radiansToDegrees
</code>
</a>
expression converts the
radian value returned by
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-atan" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$atan
</code>
</span>
</a>
to the equivalent
value in degrees.
</p>
<p class="leafygreen-ui-1kp3ins">
The command returns the following output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : ObjectId(\"5c50782193f833234ba90d85\"),\n \"side_a\" : NumberDecimal(\"3\"),\n \"side_b\" : NumberDecimal(\"4\"),\n \"hypotenuse\" : NumberDecimal(\"5\"),\n \"angle_a\" : NumberDecimal(\"53.13010235415597870314438744090658\")\n}","programmingLanguage":"Bash"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> : ObjectId(<span class="lg-highlight-string">"5c50782193f833234ba90d85"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"side_a"</span> : NumberDecimal(<span class="lg-highlight-string">"3"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"side_b"</span> : NumberDecimal(<span class="lg-highlight-string">"4"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"hypotenuse"</span> : NumberDecimal(<span class="lg-highlight-string">"5"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"angle_a"</span> : NumberDecimal(<span class="lg-highlight-string">"53.13010235415597870314438744090658"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Since
<code class="leafygreen-ui-1l06pbn">
side_b
</code>
and
<code class="leafygreen-ui-1l06pbn">
side_a
</code>
are stored as
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/reference/data-types/#std-label-shell-type-decimal" target="_self">
<span>
128-bit decimals
</span>
</a>
, the output of
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-atan" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$atan
</code>
</span>
</a>
is a 128-bit decimal.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_xxo0r82ax" class="leafygreen-ui-38lglc" id="_jhd9u86jd" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
trigonometry
</code>
collection contains a document that
stores three sides of a right-angle triangle:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : ObjectId(\"5c50782193f833234ba90d85\"),\n \"side_a\" : NumberDecimal(\"3\"),\n \"side_b\" : NumberDecimal(\"4\"),\n \"hypotenuse\" : NumberDecimal(\"5\")\n}","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> : ObjectId(<span class="lg-highlight-string">"5c50782193f833234ba90d85"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"side_a"</span> : NumberDecimal(<span class="lg-highlight-string">"3"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"side_b"</span> : NumberDecimal(<span class="lg-highlight-string">"4"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"hypotenuse"</span> : NumberDecimal(<span class="lg-highlight-string">"5"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following aggregation operation uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-atan" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$atan
</code>
</span>
</a>
expression to calculate the angle adjacent
to
<code class="leafygreen-ui-1l06pbn">
side_a
</code>
and add it to the input document using the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/addFields/#mongodb-pipeline-pipe.-addFields">
<code class="leafygreen-ui-1l06pbn">
$addFields
</code>
</a>
pipeline stage.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.trigonometry.aggregate([\n {\n $addFields : {\n \"angle_a\" : {\n $atan : {\n $divide : [ \"$side_b\", \"$side_a\" ]\n }\n }\n }\n }\n])","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.trigonometry.aggregate([</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-variable">$addFields</span> : {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"angle_a"</span> : {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-variable">$atan</span> : {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-variable">$divide</span> : [ <span class="lg-highlight-string">"</span><span class="lg-highlight-variable lg-highlight-string">$side_b</span><span class="lg-highlight-string">"</span>, <span class="lg-highlight-string">"</span><span class="lg-highlight-variable lg-highlight-string">$side_a</span><span class="lg-highlight-string">"</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The command returns the following output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : ObjectId(\"5c50782193f833234ba90d85\"),\n \"side_a\" : NumberDecimal(\"3\"),\n \"side_b\" : NumberDecimal(\"4\"),\n \"hypotenuse\" : NumberDecimal(\"5\"),\n \"angle_a\" : NumberDecimal(\"0.9272952180016122324285124629224287\")\n}","programmingLanguage":"Bash"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> : ObjectId(<span class="lg-highlight-string">"5c50782193f833234ba90d85"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"side_a"</span> : NumberDecimal(<span class="lg-highlight-string">"3"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"side_b"</span> : NumberDecimal(<span class="lg-highlight-string">"4"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"hypotenuse"</span> : NumberDecimal(<span class="lg-highlight-string">"5"</span>),</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"angle_a"</span> : NumberDecimal(<span class="lg-highlight-string">"0.9272952180016122324285124629224287"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Since
<code class="leafygreen-ui-1l06pbn">
side_b
</code>
and
<code class="leafygreen-ui-1l06pbn">
side_a
</code>
are stored as
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/reference/data-types/#std-label-shell-type-decimal" target="_self">
<span>
128-bit decimals
</span>
</a>
, the output of
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-atan" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$atan
</code>
</span>
</a>
is a 128-bit decimal.
</p>
</div>
</div>
</div>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/query/polygon/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$polygon
<a class="headerlink leafygreen-ui-1kepx47" href="#-polygon" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-polygon">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="query">
<dt>
<code class="leafygreen-ui-1l06pbn">
$polygon
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-query-op.-polygon" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-query-op.-polygon">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Specifies a polygon for a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-geospatial">
geospatial
</a>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/geoWithin/#mongodb-query-op.-geoWithin">
<code class="leafygreen-ui-1l06pbn">
$geoWithin
</code>
</a>
query on legacy coordinate
pairs. The query returns pairs that are within the bounds of the
polygon. The operator does
<em>
not
</em>
query for GeoJSON objects.
</p>
<p class="leafygreen-ui-1kp3ins">
To define the polygon, specify an array of coordinate points:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n <location>: {\n $geoWithin: {\n $polygon: [ [ <x1> , <y1> ], [ <x2> , <y2> ], [ <x3> , <y3> ], ... ]\n }\n }\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- --><location field>: {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $geoWithin: {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $polygon: [ [ <x1> , <y1> ], [ <x2> , <y2> ], [ <x3> , <y3> ], ... ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The last point is always implicitly connected to the first. You can
specify as many points, i.e. sides, as you like.
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
If you use longitude and latitude, specify longitude first.
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
</div>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-polygon" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$polygon
</code>
</span>
</a>
operator calculates distances using flat (planar)
geometry.
</p>
<p class="leafygreen-ui-1kp3ins">
Applications can use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-polygon" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$polygon
</code>
</span>
</a>
<em>
without
</em>
having a geospatial index.
However, geospatial indexes support much faster queries than the
unindexed equivalents.
</p>
<p class="leafygreen-ui-1kp3ins">
Only the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2d/#std-label-2d-index">
2d
</a>
geospatial index supports the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-polygon" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$polygon
</code>
</span>
</a>
operator.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following query returns all documents that have coordinates that
exist within the polygon defined by
<code class="leafygreen-ui-1l06pbn">
[ 0 , 0 ]
</code>
,
<code class="leafygreen-ui-1l06pbn">
[ 3 , 6 ]
</code>
, and
<code class="leafygreen-ui-1l06pbn">
[ 6 , 0 ]
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.places.find(\n {\n loc: {\n $geoWithin: { $polygon: [ [ 0 , 0 ], [ 3 , 6 ], [ 6 , 0 ] ] }\n }\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">places</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">loc</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$geoWithin</span>: <!-- -->{ <span class="lg-highlight-attr">$polygon</span>: <!-- -->[ <!-- -->[ <span class="lg-highlight-number">0</span> <!-- -->, <span class="lg-highlight-number">0</span> ]<!-- -->, <!-- -->[ <span class="lg-highlight-number">3</span> <!-- -->, <span class="lg-highlight-number">6</span> ]<!-- -->, <!-- -->[ <span class="lg-highlight-number">6</span> <!-- -->, <span class="lg-highlight-number">0</span> ] ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/query/type/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$type
<a class="headerlink leafygreen-ui-1kepx47" href="#-type" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-type">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#querying-by-array-type" target="_self">
<span>
Querying by Array Type
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#additional-information" target="_self">
<span>
Additional Information
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="query">
<dt>
<code class="leafygreen-ui-1l06pbn">
$type
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-query-op.-type" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-query-op.-type">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-type" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$type
</code>
</span>
</a>
selects documents where the
<em>
value
</em>
of the
<code class="leafygreen-ui-1l06pbn">
field
</code>
is an instance of the specified
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-BSON">
BSON
</a>
type(s).
Querying by data type is useful when dealing with highly
unstructured data where data types are not predictable.
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can use
<code class="leafygreen-ui-1l06pbn">
$type
</code>
for deployments hosted in the following
environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
A
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-type" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$type
</code>
</span>
</a>
expression for a single
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-BSON">
BSON
</a>
type has
the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ field: { $type: <bson> } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">field</span>: <!-- -->{ <span class="lg-highlight-attr">$type</span>: <span class="lg-highlight-tag lg-highlight-xml"><</span><span class="lg-highlight-name lg-highlight-tag lg-highlight-xml">BSON</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">type</span><span class="lg-highlight-tag lg-highlight-xml">></span><span class="lg-highlight-xml"> } }</span></td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
You can specify either the number or alias for the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-document-type-available-types" target="_self">
<span>
BSON
type
<!-- -->
.
</span>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-type" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$type
</code>
</span>
</a>
expression can also accept an array of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-BSON">
BSON
</a>
types and has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ field: { $type: [ <bson> , <bson>, ... ] } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">field</span>: <!-- -->{ <span class="lg-highlight-attr">$type</span>: <!-- -->[ <!-- --><BSON type1> , <BSON type2>, ... ] } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The above query matches documents where the
<code class="leafygreen-ui-1l06pbn">
field
</code>
value is
any of the listed types. The types specified in the array can be
either numeric or string aliases.
</p>
<p class="leafygreen-ui-1kp3ins">
See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-document-querying-by-multiple-data-types" target="_self">
<span>
Querying by Multiple Data Types
</span>
</a>
for an example.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-document-type-available-types" target="_self">
<span>
Available Types
</span>
</a>
describes the BSON types and
their corresponding numeric and string aliases.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/isNumber/#mongodb-expression-exp.-isNumber">
<code class="leafygreen-ui-1l06pbn">
$isNumber
</code>
</a>
- checks if the argument is a number.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/type/#mongodb-expression-exp.-type">
<code class="leafygreen-ui-1l06pbn">
$type (Aggregation)
</code>
</a>
- returns the BSON type
of the argument.
</p>
</li>
</ul>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-type" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$type
</code>
</span>
</a>
returns documents where the BSON type of the
<code class="leafygreen-ui-1l06pbn">
field
</code>
matches the BSON type passed to
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-type" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$type
</code>
.
</span>
</a>
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Arrays
<a class="headerlink leafygreen-ui-1kepx47" href="#arrays" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="arrays">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
For documents where
<code class="leafygreen-ui-1l06pbn">
field
</code>
is an array,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-type" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$type
</code>
</span>
</a>
returns
documents in which at least one array element matches a type passed to
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-type" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$type
</code>
.
</span>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
Queries for
<code class="leafygreen-ui-1l06pbn">
$type: "array"
</code>
return documents where the field itself is
an array.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-document-type-available-types">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Available Types
<a class="headerlink leafygreen-ui-1kepx47" href="#available-types" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="available-types">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-type" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$type
</code>
</span>
</a>
operator accepts string aliases
for the BSON types in addition to the numbers corresponding to the BSON
types.
<a class="footnote-reference header-buffer" href="#footnote-type0" id="ref-type0-id1">
[
<!-- -->
1
<!-- -->
]
</a>
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Number
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Alias
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Notes
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Double
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
1
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"double"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
String
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
2
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"string"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Object
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
3
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"object"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
4
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"array"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Binary data
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
5
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"binData"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Undefined
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
6
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"undefined"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Deprecated.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
ObjectId
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
7
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"objectId"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
8
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"bool"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Date
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
9
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"date"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Null
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
10
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"null"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Regular Expression
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
11
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"regex"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
DBPointer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
12
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"dbPointer"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Deprecated.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
JavaScript
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
13
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"javascript"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Symbol
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
14
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"symbol"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Deprecated.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
32-bit integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
16
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"int"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Timestamp
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
17
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"timestamp"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
64-bit integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
18
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"long"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Decimal128
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
19
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"decimal"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Min key
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
-1
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"minKey"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Max key
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
127
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"maxKey"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-type" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$type
</code>
</span>
</a>
supports the
<code class="leafygreen-ui-1l06pbn">
number
</code>
alias, which matches against
the following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-BSON">
BSON
</a>
types:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-Double">
<code class="leafygreen-ui-1l06pbn">
double
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-Int32">
<code class="leafygreen-ui-1l06pbn">
32-bit integer
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-Int64">
<code class="leafygreen-ui-1l06pbn">
64-bit integer
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-Decimal128">
<code class="leafygreen-ui-1l06pbn">
decimal
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For examples, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-query-type-examples" target="_self">
<span>
Examples
<!-- -->
.
</span>
</a>
</p>
<table class="header-buffer leafygreen-ui-rbqgrl" frame="void" id="footnote-type0" rules="none">
<colgroup>
<col/>
</colgroup>
<tbody valign="top">
<tr>
<td class="leafygreen-ui-17r2xs0">
[
<a href="#ref-type0-id1">
1
</a>
]
</td>
<td class="leafygreen-ui-17r2xs0">
<!-- -->
Users can no longer use the query filter
<code class="leafygreen-ui-1l06pbn">
$type: 0
</code>
as a synonym for
<code class="leafygreen-ui-1l06pbn">
$exists:false
</code>
. To query for null or missing fields, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/query-for-null-fields/">
Query for Null or Missing Fields
<!-- -->
.
</a>
</td>
</tr>
</tbody>
</table>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/isNumber/#mongodb-expression-exp.-isNumber">
<code class="leafygreen-ui-1l06pbn">
$isNumber
</code>
</a>
</p>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
MinKey and MaxKey
<a class="headerlink leafygreen-ui-1kepx47" href="#minkey-and-maxkey" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="minkey-and-maxkey">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-MinKey">
<code class="leafygreen-ui-1l06pbn">
MinKey
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-MaxKey">
<code class="leafygreen-ui-1l06pbn">
MaxKey
</code>
</a>
are used in comparison operations and exist primarily for internal use.
For all possible
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-BSON">
BSON
</a>
element values,
<code class="leafygreen-ui-1l06pbn">
MinKey
</code>
is always the
smallest value while
<code class="leafygreen-ui-1l06pbn">
MaxKey
</code>
is always the greatest value.
</p>
<p class="leafygreen-ui-1kp3ins">
Querying for
<code class="leafygreen-ui-1l06pbn">
minKey
</code>
or
<code class="leafygreen-ui-1l06pbn">
maxKey
</code>
with
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-type" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$type
</code>
</span>
</a>
only returns fields
that match the special
<code class="leafygreen-ui-1l06pbn">
MinKey
</code>
or
<code class="leafygreen-ui-1l06pbn">
MaxKey
</code>
values.
</p>
<p class="leafygreen-ui-1kp3ins">
Suppose that the
<code class="leafygreen-ui-1l06pbn">
data
</code>
collection has two documents
with
<code class="leafygreen-ui-1l06pbn">
MinKey
</code>
and
<code class="leafygreen-ui-1l06pbn">
MaxKey
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.data.insertMany( [\n { _id : 1, x : { \"$minKey\" : 1 } },\n { _id : 2, y : { \"$maxKey\" : 1 } }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">data</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">1</span>, <!-- -->x <!-- -->: <!-- -->{ <span class="lg-highlight-string">"$minKey"</span> <!-- -->: <span class="lg-highlight-number">1</span> } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">2</span>, <!-- -->y <!-- -->: <!-- -->{ <span class="lg-highlight-string">"$maxKey"</span> <!-- -->: <span class="lg-highlight-number">1</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following query returns the document with
<code class="leafygreen-ui-1l06pbn">
_id: 1
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.data.find( { x: { $type: \"minKey\" } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">data</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">x</span>: <!-- -->{ <span class="lg-highlight-attr">$type</span>: <span class="lg-highlight-string">"minKey"</span> } } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following query returns the document with
<code class="leafygreen-ui-1l06pbn">
_id: 2
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.data.find( { y: { $type: \"maxKey\" } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">data</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">y</span>: <!-- -->{ <span class="lg-highlight-attr">$type</span>: <span class="lg-highlight-string">"maxKey"</span> } } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-query-type-examples">
</span>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<span class="leafygreen-ui-1qnjd6d" id="std-label-document-querying-by-data-type">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Querying by Data Type
<a class="headerlink leafygreen-ui-1kepx47" href="#querying-by-data-type" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="querying-by-data-type">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
addressBook
</code>
contains addresses and zipcodes, where
<code class="leafygreen-ui-1l06pbn">
zipCode
</code>
has
<code class="leafygreen-ui-1l06pbn">
string
</code>
,
<code class="leafygreen-ui-1l06pbn">
int
</code>
,
<code class="leafygreen-ui-1l06pbn">
double
</code>
, and
<code class="leafygreen-ui-1l06pbn">
long
</code>
values:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.addressBook.insertMany( [\n { _id : 1, address : \"2030 Martian Way\", zipCode : \"90698345\" },\n { _id : 2, address : \"156 Lunar Place\", zipCode : 43339374 },\n { _id : 3, address : \"2324 Pluto Place\", zipCode : NumberLong(3921412) },\n { _id : 4, address : \"55 Saturn Ring\" , zipCode : NumberInt(88602117) },\n { _id : 5, address : \"104 Venus Drive\", zipCode : [\"834847278\", \"1893289032\"] }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">addressBook</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">1</span>, <!-- -->address <!-- -->: <span class="lg-highlight-string">"2030 Martian Way"</span>, <!-- -->zipCode <!-- -->: <span class="lg-highlight-string">"90698345"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">2</span>, <!-- -->address <!-- -->: <span class="lg-highlight-string">"156 Lunar Place"</span>, <!-- -->zipCode <!-- -->: <span class="lg-highlight-number">43339374</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">3</span>, <!-- -->address <!-- -->: <span class="lg-highlight-string">"2324 Pluto Place"</span>, <!-- -->zipCode <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">3921412</span>) }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">4</span>, <!-- -->address <!-- -->: <span class="lg-highlight-string">"55 Saturn Ring"</span> <!-- -->, <!-- -->zipCode <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberInt</span>(<span class="lg-highlight-number">88602117</span>) }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">5</span>, <!-- -->address <!-- -->: <span class="lg-highlight-string">"104 Venus Drive"</span>, <!-- -->zipCode <!-- -->: <!-- -->[<span class="lg-highlight-string">"834847278"</span>, <span class="lg-highlight-string">"1893289032"</span>] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following queries return all documents where
<code class="leafygreen-ui-1l06pbn">
zipCode
</code>
is the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-BSON">
BSON
</a>
type
<code class="leafygreen-ui-1l06pbn">
string
</code>
<em>
or
</em>
is an array containing an element of
the specified type:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.addressBook.find( { zipCode : { $type : 2 } } );\ndb.addressBook.find( { zipCode : { $type : \"string\" } } );","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">addressBook</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <!-- -->zipCode <!-- -->: <!-- -->{ <!-- -->$type<!-- --> <!-- -->: <span class="lg-highlight-number">2</span> } } )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">addressBook</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <!-- -->zipCode <!-- -->: <!-- -->{ <!-- -->$type<!-- --> <!-- -->: <span class="lg-highlight-string">"string"</span> } } )<!-- -->;</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
These queries return:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ _id : 1, address : \"2030 Martian Way\", zipCode : \"90698345\" }\n{ _id : 5, address : \"104 Venus Drive\", zipCode : [ \"834847278\", \"1893289032\" ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">1</span>, <!-- -->address <!-- -->: <span class="lg-highlight-string">"2030 Martian Way"</span>, <!-- -->zipCode <!-- -->: <span class="lg-highlight-string">"90698345"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">5</span>, <!-- -->address <!-- -->: <span class="lg-highlight-string">"104 Venus Drive"</span>, <!-- -->zipCode <!-- -->: <!-- -->[ <span class="lg-highlight-string">"834847278"</span>, <span class="lg-highlight-string">"1893289032"</span> ] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following queries return all documents where
<code class="leafygreen-ui-1l06pbn">
zipCode
</code>
is the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-BSON">
BSON
</a>
type
<code class="leafygreen-ui-1l06pbn">
double
</code>
<em>
or
</em>
is an array containing an element of
the specified type:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.addressBook.find( { zipCode : { $type : 1 } } );\ndb.addressBook.find( { zipCode : { $type : \"double\" } } );","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">addressBook</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <!-- -->zipCode <!-- -->: <!-- -->{ <!-- -->$type<!-- --> <!-- -->: <span class="lg-highlight-number">1</span> } } )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">addressBook</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <!-- -->zipCode <!-- -->: <!-- -->{ <!-- -->$type<!-- --> <!-- -->: <span class="lg-highlight-string">"double"</span> } } )<!-- -->;</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
These queries return:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ _id : 2, address : \"156 Lunar Place\", zipCode : 43339374 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">2</span>, <!-- -->address <!-- -->: <span class="lg-highlight-string">"156 Lunar Place"</span>, <!-- -->zipCode <!-- -->: <span class="lg-highlight-number">43339374</span> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following query uses the
<code class="leafygreen-ui-1l06pbn">
number
</code>
alias to return documents where
<code class="leafygreen-ui-1l06pbn">
zipCode
</code>
is the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-BSON">
BSON
</a>
type
<code class="leafygreen-ui-1l06pbn">
double
</code>
,
<code class="leafygreen-ui-1l06pbn">
int
</code>
, or
<code class="leafygreen-ui-1l06pbn">
long
</code>
<em>
or
</em>
is an array containing an element of the specified types:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.addressBook.find( { zipCode : { $type : \"number\" } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">addressBook</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <!-- -->zipCode <!-- -->: <!-- -->{ <!-- -->$type<!-- --> <!-- -->: <span class="lg-highlight-string">"number"</span> } } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
These queries return:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ _id : 2, address : \"156 Lunar Place\", zipCode : 43339374 }\n{ _id : 3, address : \"2324 Pluto Place\", zipCode : NumberLong(3921412) }\n{ _id : 4, address : \"55 Saturn Ring\", zipCode : 88602117 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">2</span>, <!-- -->address <!-- -->: <span class="lg-highlight-string">"156 Lunar Place"</span>, <!-- -->zipCode <!-- -->: <span class="lg-highlight-number">43339374</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">3</span>, <!-- -->address <!-- -->: <span class="lg-highlight-string">"2324 Pluto Place"</span>, <!-- -->zipCode <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">3921412</span>) }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">4</span>, <!-- -->address <!-- -->: <span class="lg-highlight-string">"55 Saturn Ring"</span>, <!-- -->zipCode <!-- -->: <span class="lg-highlight-number">88602117</span> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-document-querying-by-multiple-data-types">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Querying by Multiple Data Types
<a class="headerlink leafygreen-ui-1kepx47" href="#querying-by-multiple-data-types" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="querying-by-multiple-data-types">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
grades
</code>
collection contains names and averages, where
<code class="leafygreen-ui-1l06pbn">
classAverage
</code>
has
<code class="leafygreen-ui-1l06pbn">
string
</code>
,
<code class="leafygreen-ui-1l06pbn">
int
</code>
, and
<code class="leafygreen-ui-1l06pbn">
double
</code>
values:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.grades.insertMany( [\n { _id : 1, name : \"Alice King\" , classAverage : 87.333333333333333 },\n { _id : 2, name : \"Bob Jenkins\", classAverage : \"83.52\" },\n { _id : 3, name : \"Cathy Hart\", classAverage: \"94.06\" },\n { _id : 4, name : \"Drew Williams\" , classAverage : NumberInt(\"93\") }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">grades</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">1</span>, <!-- -->name <!-- -->: <span class="lg-highlight-string">"Alice King"</span> <!-- -->, <!-- -->classAverage <!-- -->: <span class="lg-highlight-number">87.333333333333333</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">2</span>, <!-- -->name <!-- -->: <span class="lg-highlight-string">"Bob Jenkins"</span>, <!-- -->classAverage <!-- -->: <span class="lg-highlight-string">"83.52"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">3</span>, <!-- -->name <!-- -->: <span class="lg-highlight-string">"Cathy Hart"</span>, <span class="lg-highlight-attr">classAverage</span>: <span class="lg-highlight-string">"94.06"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">4</span>, <!-- -->name <!-- -->: <span class="lg-highlight-string">"Drew Williams"</span> <!-- -->, <!-- -->classAverage <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberInt</span>(<span class="lg-highlight-string">"93"</span>) }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following queries return all documents where
<code class="leafygreen-ui-1l06pbn">
classAverage
</code>
is the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-BSON">
BSON
</a>
type
<code class="leafygreen-ui-1l06pbn">
string
</code>
or
<code class="leafygreen-ui-1l06pbn">
double
</code>
<em>
or
</em>
is an array containing
an element of the specified types. The first query uses numeric aliases
while the second query uses string aliases.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.grades.find( { classAverage : { $type : [ 2 , 1 ] } } );\ndb.grades.find( { classAverage : { $type : [ \"string\" , \"double\" ] } } );","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">grades</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <!-- -->classAverage <!-- -->: <!-- -->{ <!-- -->$type<!-- --> <!-- -->: <!-- -->[ <span class="lg-highlight-number">2</span> <!-- -->, <span class="lg-highlight-number">1</span> ] } } )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">grades</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <!-- -->classAverage <!-- -->: <!-- -->{ <!-- -->$type<!-- --> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"string"</span> <!-- -->, <span class="lg-highlight-string">"double"</span> ] } } )<!-- -->;</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
These queries return the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ _id : 1, name : \"Alice King\", classAverage : 87.33333333333333 }\n{ _id : 2, name : \"Bob Jenkins\", classAverage : \"83.52\" }\n{ _id : 3, name : \"Cathy Hart\", classAverage : \"94.06\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">1</span>, <!-- -->name <!-- -->: <span class="lg-highlight-string">"Alice King"</span>, <!-- -->classAverage <!-- -->: <span class="lg-highlight-number">87.33333333333333</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">2</span>, <!-- -->name <!-- -->: <span class="lg-highlight-string">"Bob Jenkins"</span>, <!-- -->classAverage <!-- -->: <span class="lg-highlight-string">"83.52"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">3</span>, <!-- -->name <!-- -->: <span class="lg-highlight-string">"Cathy Hart"</span>, <!-- -->classAverage <!-- -->: <span class="lg-highlight-string">"94.06"</span> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-document-querying-by-MinKey-And-MaxKey">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Querying by MinKey and MaxKey
<a class="headerlink leafygreen-ui-1kepx47" href="#querying-by-minkey-and-maxkey" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="querying-by-minkey-and-maxkey">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
restaurants
</code>
collection uses
<code class="leafygreen-ui-1l06pbn">
minKey
</code>
for any grade that is a
failing grade:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.restaurants.insertOne( [\n {\n _id: 1,\n address: {\n building: \"230\",\n coord: [ -73.996089, 40.675018 ],\n street: \"Huntington St\",\n zipcode: \"11231\"\n },\n borough: \"Brooklyn\",\n cuisine: \"Bakery\",\n grades: [\n { date : new Date(1393804800000), grade : \"C\", score : 15 },\n { date : new Date(1378857600000), grade : \"C\", score : 16 },\n { date : new Date(1358985600000), grade : MinKey(), score : 30 },\n { date : new Date(1322006400000), grade : \"C\", score : 15 }\n ],\n name : \"Dirty Dan's Donuts\",\n restaurant_id : \"30075445\"\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">restaurants</span>.<span class="lg-highlight-title lg-highlight-function">insertOne</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">address</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">building</span>: <span class="lg-highlight-string">"230"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">coord</span>: <!-- -->[ <!-- -->-<span class="lg-highlight-number">73.996089</span>, <span class="lg-highlight-number">40.675018</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">street</span>: <span class="lg-highlight-string">"Huntington St"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">zipcode</span>: <span class="lg-highlight-string">"11231"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">borough</span>: <span class="lg-highlight-string">"Brooklyn"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">cuisine</span>: <span class="lg-highlight-string">"Bakery"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">grades</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-number">1393804800000</span>)<!-- -->, <!-- -->grade <!-- -->: <span class="lg-highlight-string">"C"</span>, <!-- -->score <!-- -->: <span class="lg-highlight-number">15</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-number">1378857600000</span>)<!-- -->, <!-- -->grade <!-- -->: <span class="lg-highlight-string">"C"</span>, <!-- -->score <!-- -->: <span class="lg-highlight-number">16</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-number">1358985600000</span>)<!-- -->, <!-- -->grade <!-- -->: <span class="lg-highlight-title lg-highlight-class">MinKey</span>(<!-- -->)<!-- -->, <!-- -->score <!-- -->: <span class="lg-highlight-number">30</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-number">1322006400000</span>)<!-- -->, <!-- -->grade <!-- -->: <span class="lg-highlight-string">"C"</span>, <!-- -->score <!-- -->: <span class="lg-highlight-number">15</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->name <!-- -->: <span class="lg-highlight-string">"Dirty Dan's Donuts"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->restaurant_id <!-- -->: <span class="lg-highlight-string">"30075445"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
And
<code class="leafygreen-ui-1l06pbn">
maxKey
</code>
for any grade that is the highest passing grade:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.restaurants.insertOne( [\n {\n _id : 2,\n address : {\n building : \"1166\",\n coord : [ -73.955184, 40.738589 ],\n street : \"Manhattan Ave\",\n zipcode : \"11222\"\n },\n borough: \"Brooklyn\",\n cuisine: \"Bakery\",\n grades: [\n { date : new Date(1393804800000), grade : MaxKey(), score : 2 },\n { date : new Date(1378857600000), grade : \"B\", score : 6 },\n { date : new Date(1358985600000), grade : MaxKey(), score : 3 },\n { date : new Date(1322006400000), grade : \"B\", score : 5 }\n ],\n name : \"Dainty Daisey's Donuts\",\n restaurant_id : \"30075449\"\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">restaurants</span>.<span class="lg-highlight-title lg-highlight-function">insertOne</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->_id <!-- -->: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->address <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->building <!-- -->: <span class="lg-highlight-string">"1166"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->coord <!-- -->: <!-- -->[ <!-- -->-<span class="lg-highlight-number">73.955184</span>, <span class="lg-highlight-number">40.738589</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->street <!-- -->: <span class="lg-highlight-string">"Manhattan Ave"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->zipcode <!-- -->: <span class="lg-highlight-string">"11222"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">borough</span>: <span class="lg-highlight-string">"Brooklyn"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">cuisine</span>: <span class="lg-highlight-string">"Bakery"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">grades</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-number">1393804800000</span>)<!-- -->, <!-- -->grade <!-- -->: <span class="lg-highlight-title lg-highlight-class">MaxKey</span>(<!-- -->)<!-- -->, <!-- -->score <!-- -->: <span class="lg-highlight-number">2</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-number">1378857600000</span>)<!-- -->, <!-- -->grade <!-- -->: <span class="lg-highlight-string">"B"</span>, <!-- -->score <!-- -->: <span class="lg-highlight-number">6</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-number">1358985600000</span>)<!-- -->, <!-- -->grade <!-- -->: <span class="lg-highlight-title lg-highlight-class">MaxKey</span>(<!-- -->)<!-- -->, <!-- -->score <!-- -->: <span class="lg-highlight-number">3</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-number">1322006400000</span>)<!-- -->, <!-- -->grade <!-- -->: <span class="lg-highlight-string">"B"</span>, <!-- -->score <!-- -->: <span class="lg-highlight-number">5</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->name <!-- -->: <span class="lg-highlight-string">"Dainty Daisey's Donuts"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->restaurant_id <!-- -->: <span class="lg-highlight-string">"30075449"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following query returns any restaurant whose
<code class="leafygreen-ui-1l06pbn">
grades.grade
</code>
field
contains
<code class="leafygreen-ui-1l06pbn">
minKey
</code>
<em>
or
</em>
is an array containing an element of
the specified type:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.restaurants.find(\n { \"grades.grade\" : { $type : \"minKey\" } }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">restaurants</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"grades.grade"</span> <!-- -->: <!-- -->{ <!-- -->$type<!-- --> <!-- -->: <span class="lg-highlight-string">"minKey"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
This returns the following results:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n _id : 1,\n address : {\n building : \"230\",\n coord : [ -73.996089, 40.675018 ],\n street : \"Huntington St\",\n zipcode : \"11231\"\n },\n borough : \"Brooklyn\",\n cuisine : \"Bakery\",\n grades : [\n { date : ISODate(\"2014-03-03T00:00:00Z\"), grade : \"C\", score : 15 },\n { date : ISODate(\"2013-09-11T00:00:00Z\"), grade : \"C\", score : 16 },\n { date : ISODate(\"2013-01-24T00:00:00Z\"), grade : { \"$minKey\" : 1 }, score : 30 },\n { date : ISODate(\"2011-11-23T00:00:00Z\"), grade : \"C\", score : 15 }\n ],\n name : \"Dirty Dan's Donuts\",\n restaurant_id : \"30075445\"\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->_id <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->address <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->building <!-- -->: <span class="lg-highlight-string">"230"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->coord <!-- -->: <!-- -->[ <!-- -->-<span class="lg-highlight-number">73.996089</span>, <span class="lg-highlight-number">40.675018</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->street <!-- -->: <span class="lg-highlight-string">"Huntington St"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->zipcode <!-- -->: <span class="lg-highlight-string">"11231"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->borough <!-- -->: <span class="lg-highlight-string">"Brooklyn"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->cuisine <!-- -->: <span class="lg-highlight-string">"Bakery"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->grades <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2014-03-03T00:00:00Z"</span>)<!-- -->, <!-- -->grade <!-- -->: <span class="lg-highlight-string">"C"</span>, <!-- -->score <!-- -->: <span class="lg-highlight-number">15</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2013-09-11T00:00:00Z"</span>)<!-- -->, <!-- -->grade <!-- -->: <span class="lg-highlight-string">"C"</span>, <!-- -->score <!-- -->: <span class="lg-highlight-number">16</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2013-01-24T00:00:00Z"</span>)<!-- -->, <!-- -->grade <!-- -->: <!-- -->{ <span class="lg-highlight-string">"$minKey"</span> <!-- -->: <span class="lg-highlight-number">1</span> }<!-- -->, <!-- -->score <!-- -->: <span class="lg-highlight-number">30</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2011-11-23T00:00:00Z"</span>)<!-- -->, <!-- -->grade <!-- -->: <span class="lg-highlight-string">"C"</span>, <!-- -->score <!-- -->: <span class="lg-highlight-number">15</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->name <!-- -->: <span class="lg-highlight-string">"Dirty Dan's Donuts"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->restaurant_id <!-- -->: <span class="lg-highlight-string">"30075445"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following query returns any restaurant whose
<code class="leafygreen-ui-1l06pbn">
grades.grade
</code>
field
contains
<code class="leafygreen-ui-1l06pbn">
maxKey
</code>
<em>
or
</em>
is an array containing an element of
the specified type:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.restaurants.find(\n { \"grades.grade\" : { $type : \"maxKey\" } }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">restaurants</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"grades.grade"</span> <!-- -->: <!-- -->{ <!-- -->$type<!-- --> <!-- -->: <span class="lg-highlight-string">"maxKey"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
This returns the following results:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n _id : 2,\n address : {\n building : \"1166\",\n coord : [ -73.955184, 40.738589 ],\n street : \"Manhattan Ave\",\n zipcode : \"11222\"\n },\n borough : \"Brooklyn\",\n cuisine : \"Bakery\",\n grades : [\n { date : ISODate(\"2014-03-03T00:00:00Z\"), grade : { \"$maxKey\" : 1 }, score : 2 },\n { date : ISODate(\"2013-09-11T00:00:00Z\"), grade : \"B\", score : 6 },\n { date : ISODate(\"2013-01-24T00:00:00Z\"), grade : { \"$maxKey\" : 1 }, score : 3 },\n { date : ISODate(\"2011-11-23T00:00:00Z\"), grade : \"B\", score : 5 }\n ],\n name : \"Dainty Daisey's Donuts\",\n restaurant_id : \"30075449\"\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->_id <!-- -->: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->address <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->building <!-- -->: <span class="lg-highlight-string">"1166"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->coord <!-- -->: <!-- -->[ <!-- -->-<span class="lg-highlight-number">73.955184</span>, <span class="lg-highlight-number">40.738589</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->street <!-- -->: <span class="lg-highlight-string">"Manhattan Ave"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->zipcode <!-- -->: <span class="lg-highlight-string">"11222"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->borough <!-- -->: <span class="lg-highlight-string">"Brooklyn"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->cuisine <!-- -->: <span class="lg-highlight-string">"Bakery"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->grades <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2014-03-03T00:00:00Z"</span>)<!-- -->, <!-- -->grade <!-- -->: <!-- -->{ <span class="lg-highlight-string">"$maxKey"</span> <!-- -->: <span class="lg-highlight-number">1</span> }<!-- -->, <!-- -->score <!-- -->: <span class="lg-highlight-number">2</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2013-09-11T00:00:00Z"</span>)<!-- -->, <!-- -->grade <!-- -->: <span class="lg-highlight-string">"B"</span>, <!-- -->score <!-- -->: <span class="lg-highlight-number">6</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2013-01-24T00:00:00Z"</span>)<!-- -->, <!-- -->grade <!-- -->: <!-- -->{ <span class="lg-highlight-string">"$maxKey"</span> <!-- -->: <span class="lg-highlight-number">1</span> }<!-- -->, <!-- -->score <!-- -->: <span class="lg-highlight-number">3</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->date <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2011-11-23T00:00:00Z"</span>)<!-- -->, <!-- -->grade <!-- -->: <span class="lg-highlight-string">"B"</span>, <!-- -->score <!-- -->: <span class="lg-highlight-number">5</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->name <!-- -->: <span class="lg-highlight-string">"Dainty Daisey's Donuts"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->restaurant_id <!-- -->: <span class="lg-highlight-string">"30075449"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-document-querying-by-array-type">
</span>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Querying by Array Type
<a class="headerlink leafygreen-ui-1kepx47" href="#querying-by-array-type" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="querying-by-array-type">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
A collection named
<code class="leafygreen-ui-1l06pbn">
sensorReading
</code>
contains the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.sensorReading.insertMany( [\n { _id : 1, readings : [ 25, 23, [ \"Warn: High Temp!\", 55 ], [ \"ERROR: SYSTEM SHUTDOWN!\", 66 ] ] },\n { _id : 2, readings : [ 25, 25, 24, 23 ] },\n { _id : 3, readings : [ 22, 24, [] ] },\n { _id : 4, readings : [] },\n { _id : 5, readings : 24 }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">sensorReading</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">1</span>, <!-- -->readings <!-- -->: <!-- -->[ <span class="lg-highlight-number">25</span>, <span class="lg-highlight-number">23</span>, <!-- -->[ <span class="lg-highlight-string">"Warn: High Temp!"</span>, <span class="lg-highlight-number">55</span> ]<!-- -->, <!-- -->[ <span class="lg-highlight-string">"ERROR: SYSTEM SHUTDOWN!"</span>, <span class="lg-highlight-number">66</span> ] ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">2</span>, <!-- -->readings <!-- -->: <!-- -->[ <span class="lg-highlight-number">25</span>, <span class="lg-highlight-number">25</span>, <span class="lg-highlight-number">24</span>, <span class="lg-highlight-number">23</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">3</span>, <!-- -->readings <!-- -->: <!-- -->[ <span class="lg-highlight-number">22</span>, <span class="lg-highlight-number">24</span>, <!-- -->[<!-- -->] ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">4</span>, <!-- -->readings <!-- -->: <!-- -->[<!-- -->] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->_id <!-- -->: <span class="lg-highlight-number">5</span>, <!-- -->readings <!-- -->: <span class="lg-highlight-number">24</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following query returns any document in which the
<code class="leafygreen-ui-1l06pbn">
readings
</code>
field is an array, empty or non-empty.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.SensorReading.find( { readings : { $type: \"array\" } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">SensorReading</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <!-- -->readings <!-- -->: <!-- -->{ <span class="lg-highlight-attr">$type</span>: <span class="lg-highlight-string">"array"</span> } } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The above query returns the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n _id : 1,\n readings : [\n 25,\n 23,\n [ \"Warn: High Temp!\", 55 ],\n [ \"ERROR: SYSTEM SHUTDOWN!\", 66 ]\n ]\n},\n{\n _id : 2,\n readings : [ 25, 25, 24, 23 ]\n},\n{\n _id : 3,\n readings : [ 22, 24, [] ]\n},\n{\n _id : 4,\n readings : []\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->_id <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->readings <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-number">25</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-number">23</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[ <span class="lg-highlight-string">"Warn: High Temp!"</span>, <span class="lg-highlight-number">55</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[ <span class="lg-highlight-string">"ERROR: SYSTEM SHUTDOWN!"</span>, <span class="lg-highlight-number">66</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->_id <!-- -->: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->readings <!-- -->: <!-- -->[ <span class="lg-highlight-number">25</span>, <span class="lg-highlight-number">25</span>, <span class="lg-highlight-number">24</span>, <span class="lg-highlight-number">23</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->_id <!-- -->: <span class="lg-highlight-number">3</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->readings <!-- -->: <!-- -->[ <span class="lg-highlight-number">22</span>, <span class="lg-highlight-number">24</span>, <!-- -->[<!-- -->] ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->_id <!-- -->: <span class="lg-highlight-number">4</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->readings <!-- -->: <!-- -->[<!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
In the documents with
<code class="leafygreen-ui-1l06pbn">
_id : 1
</code>
,
<code class="leafygreen-ui-1l06pbn">
_id : 2
</code>
,
<code class="leafygreen-ui-1l06pbn">
_id : 3
</code>
, and
<code class="leafygreen-ui-1l06pbn">
_id : 4
</code>
, the
<code class="leafygreen-ui-1l06pbn">
readings
</code>
field is an array.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Additional Information
<a class="headerlink leafygreen-ui-1kepx47" href="#additional-information" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="additional-information">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/query-for-null-fields/">
Query for Null or Missing Fields
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
db.collection.find()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-bson-types">
BSON Types
<!-- -->
.
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/legacy-opcodes/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Legacy Opcodes
<a class="headerlink leafygreen-ui-1kepx47" href="#legacy-opcodes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="legacy-opcodes">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#op_delete" target="_self">
<span>
OP_DELETE
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#op_get_more" target="_self">
<span>
OP_GET_MORE
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#op_insert" target="_self">
<span>
OP_INSERT
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#op_kill_cursors" target="_self">
<span>
OP_KILL_CURSORS
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#op_query" target="_self">
<span>
OP_QUERY
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#op_reply" target="_self">
<span>
OP_REPLY
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#op_update" target="_self">
<span>
OP_UPDATE
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
This page describes legacy opcodes that are no longer supported by
MongoDB. These legacy opcodes are:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Deprecated as of MongoDB 5.0.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Unsupported as of MongoDB 5.1.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.1,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-wire-protocol/#std-label-wire-op-msg">
OP_MSG
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-wire-protocol/#std-label-wire-op-compressed">
OP_COMPRESSED
</a>
are the only supported opcodes
to send requests to a MongoDB server.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-wire-op-delete">
</span>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
OP_DELETE
<a class="headerlink leafygreen-ui-1kepx47" href="#op_delete" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="op_delete">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The OP_DELETE message is used to remove one or more documents from a
collection. The format of the OP_DELETE message is:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"struct {\n MsgHeader header; // standard message header\n int32 ZERO; // 0 - reserved for future use\n cstring fullCollectionName; // \"dbname.collectionname\"\n int32 flags; // bit values - see below for details.\n document selector; // query object. See below for details.\n}","programmingLanguage":"C"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light c leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword lg-highlight-class">struct</span><span class="lg-highlight-class"> {</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> MsgHeader header; <span class="lg-highlight-comment">// standard message header</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int32 ZERO; <span class="lg-highlight-comment">// 0 -</span><span class="lg-highlight-comment"> reserved for future </span><span class="lg-highlight-comment">use</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> cstring fullCollectionName; <span class="lg-highlight-comment">// "dbname.collectionname"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int32 flags; <span class="lg-highlight-comment">// bit values -</span><span class="lg-highlight-comment"> see below for </span><span class="lg-highlight-comment">details.</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> document selector; <span class="lg-highlight-comment">// query object.</span><span class="lg-highlight-comment"> See below for </span><span class="lg-highlight-comment">details.</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
header
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Message header. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-wire-protocol/#std-label-wp-message-header">
Standard Message Header
<!-- -->
.
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ZERO
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Integer value of 0. Reserved for future use.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
fullCollectionName
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The full collection name, specifically its namespace. The
namespace is the concatenation of the database name with the
collection name, using a
<code class="leafygreen-ui-1l06pbn">
.
</code>
for the concatenation. For
example, for the database
<code class="leafygreen-ui-1l06pbn">
test
</code>
and the collection
<code class="leafygreen-ui-1l06pbn">
contacts
</code>
, the full collection name is
<code class="leafygreen-ui-1l06pbn">
test.contacts
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
flags
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Bit values for the operation: The bit values correspond to the
following:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
0
</code>
corresponds to SingleRemove. If set, the database will
remove only the first matching document in the collection.
Otherwise all matching documents will be removed.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
1
</code>
-
<code class="leafygreen-ui-1l06pbn">
31
</code>
are reserved. Must be set to 0.
</p>
</li>
</ul>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
selector
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
BSON document that represent the query used to select the
documents to be removed. The selector contains one or more
elements, all of which must match for a document to be removed
from the collection.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
There is no response to an OP_DELETE message.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-wire-op-get-more">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
OP_GET_MORE
<a class="headerlink leafygreen-ui-1kepx47" href="#op_get_more" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="op_get_more">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The OP_GET_MORE message is used to query the database for documents in a
collection. The format of the OP_GET_MORE message is:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"struct {\n MsgHeader header; // standard message header\n int32 ZERO; // 0 - reserved for future use\n cstring fullCollectionName; // \"dbname.collectionname\"\n int32 numberToReturn; // number of documents to return\n int64 cursorID; // cursorID from the OP_REPLY\n}","programmingLanguage":"C"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light c leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword lg-highlight-class">struct</span><span class="lg-highlight-class"> {</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> MsgHeader header; <span class="lg-highlight-comment">// standard message header</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int32 ZERO; <span class="lg-highlight-comment">// 0 -</span><span class="lg-highlight-comment"> reserved for future </span><span class="lg-highlight-comment">use</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> cstring fullCollectionName; <span class="lg-highlight-comment">// "dbname.collectionname"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int32 numberToReturn; <span class="lg-highlight-comment">// number of documents to return</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int64 cursorID; <span class="lg-highlight-comment">// cursorID from the OP_REPLY</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
header
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Message header. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-wire-protocol/#std-label-wp-message-header">
Standard Message Header
<!-- -->
.
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ZERO
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Integer value of 0. Reserved for future use.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
fullCollectionName
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The full collection name, specifically its namespace. The
namespace is the concatenation of the database name with the
collection name, using a
<code class="leafygreen-ui-1l06pbn">
.
</code>
for the concatenation. For
example, for the database
<code class="leafygreen-ui-1l06pbn">
test
</code>
and the collection
<code class="leafygreen-ui-1l06pbn">
contacts
</code>
, the full collection name is
<code class="leafygreen-ui-1l06pbn">
test.contacts
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
numberToReturn
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Limits the number of documents in the first
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-wire-op-reply" target="_self">
<span>
OP_REPLY
</span>
</a>
message to the query. However, the database will
still establish a cursor and return the
<code class="leafygreen-ui-1l06pbn">
cursorID
</code>
to the
client if there are more results than
<code class="leafygreen-ui-1l06pbn">
numberToReturn
</code>
. If the
client driver offers 'limit' functionality (like the SQL LIMIT
keyword), then it is up to the client driver to ensure that no
more than the specified number of document are returned to the
calling application.
</p>
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
numberToReturn
</code>
is:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
0
</code>
, the database uses the default
return size.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Negative, the database returns that number and close the
cursor. No further results for that query can be fetched.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
1
</code>
, the server will treat the value as
<code class="leafygreen-ui-1l06pbn">
-1
</code>
(closing the
cursor automatically).
</p>
</li>
</ul>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
cursorID
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Cursor identifier that came in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-wire-op-reply" target="_self">
<span>
OP_REPLY
</span>
</a>
. This must be the value that came from the
database.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
The database will respond to an OP_GET_MORE message with an
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-wire-op-reply" target="_self">
<span>
OP_REPLY
</span>
</a>
message.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-wire-op-insert">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
OP_INSERT
<a class="headerlink leafygreen-ui-1kepx47" href="#op_insert" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="op_insert">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The OP_INSERT message is used to insert one or more documents into a
collection. The format of the OP_INSERT message is:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"struct {\n MsgHeader header; // standard message header\n int32 flags; // bit values - see below\n cstring fullCollectionName; // \"dbname.collectionname\"\n document* documents; // one or more documents to insert into the collection\n}","programmingLanguage":"C"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light c leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword lg-highlight-class">struct</span><span class="lg-highlight-class"> {</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> MsgHeader header; <span class="lg-highlight-comment">// standard message header</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int32 flags; <span class="lg-highlight-comment">// bit values - see below</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> cstring fullCollectionName; <span class="lg-highlight-comment">// "dbname.collectionname"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> document* documents; <span class="lg-highlight-comment">// one or</span><span class="lg-highlight-comment"> more documents to </span><span class="lg-highlight-comment">insert into the collection</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
header
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Message header. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-wire-protocol/#std-label-wp-message-header">
Standard Message Header
<!-- -->
.
</a>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
flags
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Bit values for the operation: The bit values correspond to the
following:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
0
</code>
corresponds to ContinueOnError. If set, the database
will not stop processing a bulk insert if one fails (for
example, due to duplicate IDs). This makes bulk insert behave
similarly to a series of single inserts, except lastError will
be set if any insert fails, not just the last one. If multiple
errors occur, only the most recent will be reported by
getLastError.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
1
</code>
-
<code class="leafygreen-ui-1l06pbn">
31
</code>
are reserved. Must be set to 0.
</p>
</li>
</ul>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
fullCollectionName
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The full collection name, specifically its namespace. The
namespace is the concatenation of the database name with the
collection name, using a
<code class="leafygreen-ui-1l06pbn">
.
</code>
for the concatenation. For
example, for the database
<code class="leafygreen-ui-1l06pbn">
test
</code>
and the collection
<code class="leafygreen-ui-1l06pbn">
contacts
</code>
, the full collection name is
<code class="leafygreen-ui-1l06pbn">
test.contacts
</code>
.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
documents
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
One or more documents to insert into the collection. If there
are more than one, they are written to the socket in sequence,
one after another.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
There is no response to an OP_INSERT message.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-wire-op-kill-cursors">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
OP_KILL_CURSORS
<a class="headerlink leafygreen-ui-1kepx47" href="#op_kill_cursors" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="op_kill_cursors">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The OP_KILL_CURSORS message is used to close an active cursor in the
database. This is necessary to ensure that database resources are
reclaimed at the end of the query. The format of the OP_KILL_CURSORS
message is:
</p>
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</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">struct {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> MsgHeader header; // standard message header</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int32 ZERO; // 0 - reserved <span class="lg-highlight-keyword">for</span> future use</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int32 numberOfCursorIDs; // number of cursorIDs <span class="lg-highlight-keyword">in</span> message</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int64* cursorIDs; // sequence of cursorIDs to close</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
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</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
header
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Message header. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-wire-protocol/#std-label-wp-message-header">
Standard Message Header
<!-- -->
.
</a>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ZERO
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Integer value of 0. Reserved for future use.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
numberOfCursorIDs
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The number of cursor IDs that are in the message.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
cursorIDs
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"Array" of cursor IDs to be closed. If there are more than one,
they are written to the socket in sequence, one after another.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
If a cursor is read until exhausted (read until
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-wire-op-query" target="_self">
<span>
OP_QUERY
</span>
</a>
or
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-wire-op-get-more" target="_self">
<span>
OP_GET_MORE
</span>
</a>
returns zero
for the cursor id), there is no need to kill the cursor.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-wire-op-query">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
OP_QUERY
<a class="headerlink leafygreen-ui-1kepx47" href="#op_query" title="Permalink to this heading">
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</svg>
<div class="css-1btu0w3 evvkmar0" id="op_query">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The OP_QUERY message is used to query the database for documents in a
collection. The format of the OP_QUERY message is:
</p>
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</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light c leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword lg-highlight-class">struct</span><span class="lg-highlight-class"> </span><span class="lg-highlight-title lg-highlight-class">OP_QUERY</span><span class="lg-highlight-class"> {</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> MsgHeader header; <span class="lg-highlight-comment">// standard message header</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int32 flags; <span class="lg-highlight-comment">// bit values of query options.</span><span class="lg-highlight-comment"> See below for </span><span class="lg-highlight-comment">details.</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> cstring fullCollectionName ; <span class="lg-highlight-comment">// "dbname.collectionname"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int32 numberToSkip; <span class="lg-highlight-comment">// number of documents to skip</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int32 numberToReturn; <span class="lg-highlight-comment">// number of documents to return</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-comment">//</span><span class="lg-highlight-comment"> in the first </span><span class="lg-highlight-comment">OP_REPLY batch</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> document query; <span class="lg-highlight-comment">// query object.</span><span class="lg-highlight-comment"> See below for </span><span class="lg-highlight-comment">details.</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> [ document returnFieldsSelector; ] <span class="lg-highlight-comment">//</span><span class="lg-highlight-comment"> Optional. Selector indicating </span><span class="lg-highlight-comment">the fields</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-comment">// to return.</span><span class="lg-highlight-comment"> See below for </span><span class="lg-highlight-comment">details.</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
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</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
header
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Message header. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-wire-protocol/#std-label-wp-message-header">
Standard Message Header
<!-- -->
.
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
flags
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Bit values for the operation: The bit values correspond to the
following:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
0
</code>
is reserved. Must be set to 0.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
1
</code>
corresponds to TailableCursor. Tailable means cursor is
not closed when the last data is retrieved. Rather, the cursor
marks the final object's position. You can resume using the
cursor later, from where it was located, if more data were
received. Like any latent cursor, the cursor may become
invalid at some point (CursorNotFound) – for example if the
final object it references were deleted.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
2
</code>
corresponds to SlaveOk. Allow query of replica slave.
Normally these return an error except for namespace "local".
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
3
</code>
corresponds to OplogReplay. You need not specify this flag
because the optimization automatically happens for eligible queries on
the oplog. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/find/#std-label-find-cmd-fields">
oplogReplay
</a>
for more
information.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
4
</code>
corresponds to NoCursorTimeout. The server normally
times out idle cursors after an inactivity period (10 minutes)
to prevent excess memory use. Set this option to prevent that.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
5
</code>
corresponds to AwaitData. Use with TailableCursor. If
the cursor is at the end of the data, block for a while rather
than returning no data. After a timeout period, the server
returns as normal.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
6
</code>
corresponds to Exhaust. Stream the data down full blast
in multiple "more" packages, on the assumption that the client
will fully read all data queried. Faster when you are pulling
a lot of data and know you want to pull it all down. Note: the
client is not allowed to not read all the data unless it
closes the connection.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
7
</code>
corresponds to Partial. Get partial results from a
mongos if some shards are down (instead of throwing an error)
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
8
</code>
-
<code class="leafygreen-ui-1l06pbn">
31
</code>
are reserved. Must be set to 0.
</p>
</li>
</ul>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
fullCollectionName
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The full collection name, specifically its namespace. The
namespace is the concatenation of the database name with the
collection name, using a
<code class="leafygreen-ui-1l06pbn">
.
</code>
for the concatenation. For
example, for the database
<code class="leafygreen-ui-1l06pbn">
test
</code>
and the collection
<code class="leafygreen-ui-1l06pbn">
contacts
</code>
, the full collection name is
<code class="leafygreen-ui-1l06pbn">
test.contacts
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
numberToSkip
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Sets the number of documents to omit - starting from the first
document in the resulting dataset - when returning the result of
the query.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
numberToReturn
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Limits the number of documents in the first
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-wire-op-reply" target="_self">
<span>
OP_REPLY
</span>
</a>
message to the query. However, the database will
still establish a cursor and return the
<code class="leafygreen-ui-1l06pbn">
cursorID
</code>
to the
client if there are more results than
<code class="leafygreen-ui-1l06pbn">
numberToReturn
</code>
. If the
client driver offers 'limit' functionality (like the SQL LIMIT
keyword), then it is up to the client driver to ensure that no
more than the specified number of document are returned to the
calling application.
</p>
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
numberToReturn
</code>
is:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
0
</code>
, the database uses the default
return size.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Negative, the database returns that number and close the
cursor. No further results for that query can be fetched.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
1
</code>
, the server will treat the value as
<code class="leafygreen-ui-1l06pbn">
-1
</code>
(closing the
cursor automatically).
</p>
</li>
</ul>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
query
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
BSON document that represents the query. The query contains
one or more elements, all of which must match for a document to
be included in the result set. Possible elements include
<code class="leafygreen-ui-1l06pbn">
$query
</code>
,
<code class="leafygreen-ui-1l06pbn">
$orderby
</code>
,
<code class="leafygreen-ui-1l06pbn">
$hint
</code>
, and
<code class="leafygreen-ui-1l06pbn">
$explain
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
returnFieldsSelector
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. BSON document that limits the fields in the returned
documents. The
<code class="leafygreen-ui-1l06pbn">
returnFieldsSelector
</code>
contains one or more
elements, each of which is the name of a field that should be
returned, and and the integer value
<code class="leafygreen-ui-1l06pbn">
1
</code>
. In JSON notation, a
<code class="leafygreen-ui-1l06pbn">
returnFieldsSelector
</code>
to limit to the fields
<code class="leafygreen-ui-1l06pbn">
a
</code>
,
<code class="leafygreen-ui-1l06pbn">
b
</code>
and
<code class="leafygreen-ui-1l06pbn">
c
</code>
would be:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ a : 1, b : 1, c : 1}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->a <!-- -->: <span class="lg-highlight-number">1</span>, <!-- -->b <!-- -->: <span class="lg-highlight-number">1</span>, <!-- -->c <!-- -->: <span class="lg-highlight-number">1</span>}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
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</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
The database will respond to an OP_QUERY message with an
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-wire-op-reply" target="_self">
<span>
OP_REPLY
</span>
</a>
message.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
MongoDB 5.1 removes support for both
<code class="leafygreen-ui-1l06pbn">
OP_QUERY
</code>
find operations
and
<code class="leafygreen-ui-1l06pbn">
OP_QUERY
</code>
commands. As an exception,
<code class="leafygreen-ui-1l06pbn">
OP_QUERY
</code>
is still
supported for running the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/hello/#mongodb-dbcommand-dbcmd.hello">
<code class="leafygreen-ui-1l06pbn">
hello
</code>
</a>
and
<code class="leafygreen-ui-1l06pbn">
isMaster
</code>
commands as part of the connection handshake.
</p>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-wire-op-reply">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
OP_REPLY
<a class="headerlink leafygreen-ui-1kepx47" href="#op_reply" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="op_reply">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
OP_REPLY
</code>
message is sent by the database in response to an
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-wire-op-query" target="_self">
<span>
OP_QUERY
</span>
</a>
or
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-wire-op-get-more" target="_self">
<span>
OP_GET_MORE
</span>
</a>
message. The format of an OP_REPLY message is:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"struct {\n MsgHeader header; // standard message header\n int32 responseFlags; // bit values - see details below\n int64 cursorID; // cursor ID if client needs to do get more's\n int32 startingFrom; // where in the cursor this reply is starting\n int32 numberReturned; // number of documents in the reply\n document* documents; // documents\n}","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">struct {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> MsgHeader header; // standard message header</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int32 responseFlags; // bit values - see details below</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int64 cursorID; // cursor ID <span class="lg-highlight-keyword">if</span> client needs to <span class="lg-highlight-keyword">do</span> get more<span class="lg-highlight-string">'s</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string"> int32 startingFrom; // where in the cursor this reply is starting</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string"> int32 numberReturned; // number of documents in the reply</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string"> document* documents; // documents</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">}</span></td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
header
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Message header. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-wire-protocol/#std-label-wp-message-header">
Standard Message Header
<!-- -->
.
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
responseFlags
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Bit values for the operation: The bit values correspond to the
following:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
0
</code>
corresponds to CursorNotFound. Is set when
<code class="leafygreen-ui-1l06pbn">
getMore
</code>
is
called but the cursor ID is not valid at the server. Returned
with zero results.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
1
</code>
corresponds to QueryFailure. Is set when query failed.
Results consist of one document containing an "$err" field
describing the failure.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
2
</code>
corresponds to ShardConfigStale. Drivers should ignore
this. Only
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
will ever see this set, in which
case, it needs to update config from the server.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
3
</code>
corresponds to AwaitCapable. Is set when the server
supports the AwaitData Query option. If it doesn't, a client
should sleep a little between getMore's of a Tailable cursor.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
4
</code>
-
<code class="leafygreen-ui-1l06pbn">
31
</code>
are reserved. Ignore.
</p>
</li>
</ul>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
cursorID
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The
<code class="leafygreen-ui-1l06pbn">
cursorID
</code>
that this OP_REPLY is a part of. In the event
that the result set of the query fits into one OP_REPLY message,
<code class="leafygreen-ui-1l06pbn">
cursorID
</code>
will be 0. This
<code class="leafygreen-ui-1l06pbn">
cursorID
</code>
must be used in any
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-wire-op-get-more" target="_self">
<span>
OP_GET_MORE
</span>
</a>
messages used to get more
data, and also must be closed by the client when no longer
needed via a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-wire-op-kill-cursors" target="_self">
<span>
OP_KILL_CURSORS
</span>
</a>
message.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
startingFrom
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Starting position in the cursor.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
numberReturned
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Number of documents in the reply.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
documents
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returned documents.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-wire-op-update">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
OP_UPDATE
<a class="headerlink leafygreen-ui-1kepx47" href="#op_update" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="op_update">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The OP_UPDATE message is used to update a document in a collection. The
format of a OP_UPDATE message is the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"struct OP_UPDATE {\n MsgHeader header; // standard message header\n int32 ZERO; // 0 - reserved for future use\n cstring fullCollectionName; // \"dbname.collectionname\"\n int32 flags; // bit values. see below\n document selector; // the query to select the document\n document update; // specification of the update to perform\n}","programmingLanguage":"C"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light c leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword lg-highlight-class">struct</span><span class="lg-highlight-class"> </span><span class="lg-highlight-title lg-highlight-class">OP_UPDATE</span><span class="lg-highlight-class"> {</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> MsgHeader header; <span class="lg-highlight-comment">// standard message header</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int32 ZERO; <span class="lg-highlight-comment">// 0 -</span><span class="lg-highlight-comment"> reserved for future </span><span class="lg-highlight-comment">use</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> cstring fullCollectionName; <span class="lg-highlight-comment">// "dbname.collectionname"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> int32 flags; <span class="lg-highlight-comment">//</span><span class="lg-highlight-comment"> bit values. see </span><span class="lg-highlight-comment">below</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> document selector; <span class="lg-highlight-comment">//</span><span class="lg-highlight-comment"> the query to </span><span class="lg-highlight-comment">select the document</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> document update; <span class="lg-highlight-comment">// specification of</span><span class="lg-highlight-comment"> the update to </span><span class="lg-highlight-comment">perform</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
header
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Message header. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-wire-protocol/#std-label-wp-message-header">
Standard Message Header
<!-- -->
.
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ZERO
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Integer value of 0. Reserved for future use.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
fullCollectionName
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The full collection name, specifically its namespace. The
namespace is the concatenation of the database name with the
collection name, using a
<code class="leafygreen-ui-1l06pbn">
.
</code>
for the concatenation. For
example, for the database
<code class="leafygreen-ui-1l06pbn">
test
</code>
and the collection
<code class="leafygreen-ui-1l06pbn">
contacts
</code>
, the full collection name is
<code class="leafygreen-ui-1l06pbn">
test.contacts
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
flags
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Bit values for the operation: The bit values correspond to the
following:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
0
</code>
corresponds to Upsert. If set, the database will insert
the supplied object into the collection if no matching
document is found.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
1
</code>
corresponds to MultiUpdate.If set, the database will
update all matching objects in the collection. Otherwise only
updates first matching document.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
2
</code>
-
<code class="leafygreen-ui-1l06pbn">
31
</code>
are reserved. Must be set to 0.
</p>
</li>
</ul>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
selector
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
BSON document that specifies the query for selection of the
document to update.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
BSON document that specifies the update to be performed. For
information on specifying updates see the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/#std-label-update-operators">
Update
Operations
</a>
documentation.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
There is no response to an OP_UPDATE message.
</p>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/command/explain/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
explain
<a class="headerlink leafygreen-ui-1kepx47" href="#explain" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="explain">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#command-fields" target="_self">
<span>
Command Fields
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#output" target="_self">
<span>
Output
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="dbcommand">
<dt>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-dbcommand-dbcmd.explain" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-dbcommand-dbcmd.explain">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
command provides information on the
execution of the following commands:
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/aggregate/#mongodb-dbcommand-dbcmd.aggregate">
<code class="leafygreen-ui-1l06pbn">
aggregate
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/count/#mongodb-dbcommand-dbcmd.count">
<code class="leafygreen-ui-1l06pbn">
count
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/distinct/#mongodb-dbcommand-dbcmd.distinct">
<code class="leafygreen-ui-1l06pbn">
distinct
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/find/#mongodb-dbcommand-dbcmd.find">
<code class="leafygreen-ui-1l06pbn">
find
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/findAndModify/#mongodb-dbcommand-dbcmd.findAndModify">
<code class="leafygreen-ui-1l06pbn">
findAndModify
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/delete/#mongodb-dbcommand-dbcmd.delete">
<code class="leafygreen-ui-1l06pbn">
delete
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/mapReduce/#mongodb-dbcommand-dbcmd.mapReduce">
<code class="leafygreen-ui-1l06pbn">
mapReduce
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/update/#mongodb-dbcommand-dbcmd.update">
<code class="leafygreen-ui-1l06pbn">
update
</code>
.
</a>
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
In
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#std-program-mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
, this command can also be run through the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.explain/#mongodb-method-db.collection.explain">
<code class="leafygreen-ui-1l06pbn">
db.collection.explain()
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.explain/#mongodb-method-cursor.explain">
<code class="leafygreen-ui-1l06pbn">
cursor.explain()
</code>
</a>
helper methods
<!-- -->
.
</p>
<p class="leafygreen-ui-1kp3ins">
Helper methods are convenient for
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#std-program-mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
users, but they may not
return the same level of information as database commands. In cases where
the convenience is not needed or the additional return fields are required,
use the database command.
</p>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Using
<code class="leafygreen-ui-1l06pbn">
explain
</code>
ignores all existing plan cache entries and prevents
the MongoDB query planner from creating a new plan cache entry.
</p>
</div>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This command is available in deployments hosted in the following environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This command is supported in all MongoDB Atlas clusters.
For information on Atlas support for all commands, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/" target="_self">
<span>
Unsupported Commands
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The command has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
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</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">explain</span>: <<!-- -->command<!-- -->><!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">verbosity</span>: <<!-- -->string<!-- -->><!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">comment</span>: <<!-- -->any<!-- -->></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Command Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#command-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="command-fields">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The command takes the following fields:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
A document specifying the command for which to return the execution
information. For details on the specific command document, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/aggregate/#mongodb-dbcommand-dbcmd.aggregate">
<code class="leafygreen-ui-1l06pbn">
aggregate
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/count/#mongodb-dbcommand-dbcmd.count">
<code class="leafygreen-ui-1l06pbn">
count
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/distinct/#mongodb-dbcommand-dbcmd.distinct">
<code class="leafygreen-ui-1l06pbn">
distinct
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/find/#mongodb-dbcommand-dbcmd.find">
<code class="leafygreen-ui-1l06pbn">
find
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/findAndModify/#mongodb-dbcommand-dbcmd.findAndModify">
<code class="leafygreen-ui-1l06pbn">
findAndModify
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/delete/#mongodb-dbcommand-dbcmd.delete">
<code class="leafygreen-ui-1l06pbn">
delete
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/mapReduce/#mongodb-dbcommand-dbcmd.mapReduce">
<code class="leafygreen-ui-1l06pbn">
mapReduce
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/update/#mongodb-dbcommand-dbcmd.update">
<code class="leafygreen-ui-1l06pbn">
update
</code>
.
</a>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
verbosity
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. A string specifying the mode in which to run
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
.
The mode affects the behavior of
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
and determines
the amount of information to return.
</p>
<p class="leafygreen-ui-1kp3ins">
The possible modes are:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"queryPlanner"
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"executionStats"
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"allPlansExecution"
</code>
(Default)
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For more information on the modes, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-explain-command-behavior" target="_self">
<span>
explain behavior
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
comment
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
any
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. A user-provided comment to attach to this command. Once set, this
comment appears alongside records of this command in the following
locations:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/log-messages/#std-label-log-messages-ref">
mongod log messages
</a>
, in the
<code class="leafygreen-ui-1l06pbn">
attr.command.cursor.comment
</code>
field.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/database-profiler/#std-label-profiler">
Database profiler
</a>
output, in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/database-profiler/#mongodb-data-system.profile.command">
<code class="leafygreen-ui-1l06pbn">
command.comment
</code>
</a>
field.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/currentOp/#mongodb-dbcommand-dbcmd.currentOp">
<code class="leafygreen-ui-1l06pbn">
currentOp
</code>
</a>
output, in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/currentOp/#mongodb-data-currentOp.command">
<code class="leafygreen-ui-1l06pbn">
command.comment
</code>
</a>
field.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
A comment can be any valid
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-bson-types">
BSON type
</a>
(string, integer, object, array, etc).
</p>
<p class="leafygreen-ui-1kp3ins">
If you specify
<code class="leafygreen-ui-1l06pbn">
explain
</code>
without a
<code class="leafygreen-ui-1l06pbn">
comment
</code>
, it inherits
any
<code class="leafygreen-ui-1l06pbn">
comment
</code>
in the command specified to
<code class="leafygreen-ui-1l06pbn">
explain
</code>
.
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-explain-command-behavior">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<span class="leafygreen-ui-1qnjd6d" id="std-label-explain-queryPlanner">
</span>
<span class="leafygreen-ui-1qnjd6d" id="std-label-explain-executionStats">
</span>
<span class="leafygreen-ui-1qnjd6d" id="std-label-explain-allPlansExecution">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Verbosity Modes
<a class="headerlink leafygreen-ui-1kepx47" href="#verbosity-modes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="verbosity-modes">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The behavior of
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
and the amount of information
returned depend on the
<code class="leafygreen-ui-1l06pbn">
verbosity
</code>
mode.
</p>
<div aria-hidden="true">
</div>
<div class="leafygreen-ui-1b75luy" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-11">
<div aria-label="Tabs to describe usage of allplans/executionstats/queryplanner" aria-orientation="horizontal" class="leafygreen-ui-m8p1vb lg-ui-tab-list-0000" data-lgid="lg-tabs-tab_list" role="tablist">
<button aria-controls="_hq9itzycs" aria-selected="true" class="leafygreen-ui-1l773z1" data-text="" id="_gs038l7xb" name="" role="tab" tabindex="0">
<div class="leafygreen-ui-1nxuzmg">
queryPlanner Mode
</div>
</button>
<button aria-controls="_cp37nhn1d" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_53rbio1ah" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
executionStats Mode
</div>
</button>
<button aria-controls="_wac2rq3d6" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_ie3ul1dug" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
allPlansExecution Mode (Default)
</div>
</button>
</div>
<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
</div>
</div>
<div class="lg-ui-tab-panels-0000" data-lgid="lg-tabs-tab_panels">
<div>
<div aria-labelledby="_rvoh6xgst" class="" id="_47gtjtbn1" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
MongoDB runs the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-plans/#std-label-read-operations-query-optimization">
query optimizer
</a>
to choose
the winning plan for the operation under evaluation.
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
returns
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.queryPlanner">
<code class="leafygreen-ui-1l06pbn">
queryPlanner
</code>
</a>
information for the evaluated
<code class="leafygreen-ui-1l06pbn">
<command>
</code>
.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_ikku6axur" class="leafygreen-ui-38lglc" id="_a2y93sy77" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
MongoDB runs the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-plans/#std-label-read-operations-query-optimization">
query optimizer
</a>
to choose
the winning plan, executes the winning plan to completion, and returns
statistics describing the execution of the winning plan.
</p>
<p class="leafygreen-ui-1kp3ins">
For write operations,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
returns information about
the update or delete operations that
<em>
would
</em>
be performed, but does
<em>
not
</em>
apply the modifications to the database.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
returns the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.queryPlanner">
<code class="leafygreen-ui-1l06pbn">
queryPlanner
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.executionStats">
<code class="leafygreen-ui-1l06pbn">
executionStats
</code>
</a>
information for the evaluated
<code class="leafygreen-ui-1l06pbn">
<command>
</code>
. However,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.executionStats">
<code class="leafygreen-ui-1l06pbn">
executionStats
</code>
</a>
does not
provide query execution information for the rejected plans.
</p>
</div>
</div>
</div>
<div>
<div aria-labelledby="_o5rr5g899" class="leafygreen-ui-38lglc" id="_w25blg08s" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<p class="leafygreen-ui-1kp3ins">
By default,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
runs in
<code class="leafygreen-ui-1l06pbn">
"allPlansExecution"
</code>
verbosity mode.
</p>
<p class="leafygreen-ui-1kp3ins">
MongoDB runs the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-plans/">
query optimizer
</a>
to choose the winning plan and executes the
winning plan to completion. In
<code class="leafygreen-ui-1l06pbn">
"allPlansExecution"
</code>
mode, MongoDB
returns statistics describing the execution of the winning plan as well
as statistics for the other candidate plans captured during
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-plans/#std-label-query-plans-query-optimization">
plan
selection
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
For write operations,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
returns information about
the update or delete operations that
<em>
would
</em>
be performed, but does
<em>
not
</em>
apply the modifications to the database.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
returns the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.queryPlanner">
<code class="leafygreen-ui-1l06pbn">
queryPlanner
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.executionStats">
<code class="leafygreen-ui-1l06pbn">
executionStats
</code>
</a>
information for the evaluated
<code class="leafygreen-ui-1l06pbn">
<command>
</code>
. The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.executionStats">
<code class="leafygreen-ui-1l06pbn">
executionStats
</code>
</a>
includes the
<em>
completed
</em>
query execution information for the
<em>
winning plan
</em>
.
</p>
<p class="leafygreen-ui-1kp3ins">
If the query optimizer considered more than one plan,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.executionStats">
<code class="leafygreen-ui-1l06pbn">
executionStats
</code>
</a>
information also includes the
<em>
partial
</em>
execution information captured during the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-plans/#std-label-query-plans-query-optimization">
plan selection phase
</a>
for both the winning and rejected
candidate plans.
</p>
</div>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Explain and Write Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#explain-and-write-operations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="explain-and-write-operations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
For write operations, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
command returns
information about the write operation that would be performed but does
not actually modify the database.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Stable API
<a class="headerlink leafygreen-ui-1kepx47" href="#stable-api" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="stable-api">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/stable-api/#std-label-stable-api">
Stable API
</a>
V1 supports the following
verbosity modes for the
<code class="leafygreen-ui-1l06pbn">
explain
</code>
command:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-ex-allPlansExecution" target="_self">
<span>
allPlansExecution
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-ex-executionStats" target="_self">
<span>
executionStats
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-ex-queryPlanner" target="_self">
<span>
queryPlanner
</span>
</a>
</p>
</li>
</ul>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
MongoDB does not guarantee any specific output format from the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
command, even when using the Stable API.
</p>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Restrictions
<a class="headerlink leafygreen-ui-1kepx47" href="#restrictions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="restrictions">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
You cannot run the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
command/
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.explain/#mongodb-method-db.collection.explain">
<code class="leafygreen-ui-1l06pbn">
db.collection.explain()
</code>
</a>
in
<code class="leafygreen-ui-1l06pbn">
executionStats
</code>
mode
or
<code class="leafygreen-ui-1l06pbn">
allPlansExecution
</code>
mode for an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.aggregate/#mongodb-method-db.collection.aggregate">
<code class="leafygreen-ui-1l06pbn">
aggregation pipeline
</code>
</a>
that contains the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/out/#mongodb-pipeline-pipe.-out">
<code class="leafygreen-ui-1l06pbn">
$out
</code>
</a>
stage.
Instead, you can either:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
run the explain in
<code class="leafygreen-ui-1l06pbn">
queryPlanner
</code>
mode or
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
run the explain in
<code class="leafygreen-ui-1l06pbn">
executionStats
</code>
mode or
<code class="leafygreen-ui-1l06pbn">
allPlansExecution
</code>
mode but without the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/out/#mongodb-pipeline-pipe.-out">
<code class="leafygreen-ui-1l06pbn">
$out
</code>
</a>
stage to return information
for the stages that precede the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/out/#mongodb-pipeline-pipe.-out">
<code class="leafygreen-ui-1l06pbn">
$out
</code>
</a>
stage.
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-explain-command-output">
</span>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Output
<a class="headerlink leafygreen-ui-1kepx47" href="#output" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="output">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
operations can return information regarding:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
explainVersion
</code>
, the output format version (for example,
<code class="leafygreen-ui-1l06pbn">
"1"
</code>
).
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
command
</code>
, which details the command being explained.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
queryShapeHash
</code>
, starting in MongoDB 8.0, which is a hexadecimal
string with the hash of a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-query-shape">
query shape
</a>
. For details, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-shapes/#std-label-query-shapes">
Query Shapes
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#std-label-explain-output-query-shape-hash">
Query Shape Hash
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.queryShapeHash">
<code class="leafygreen-ui-1l06pbn">
explain.queryShapeHash
</code>
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#std-label-queryPlanner">
<code class="leafygreen-ui-1l06pbn">
queryPlanner
</code>
</a>
, which details the plan selected by the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-plans/#std-label-read-operations-query-optimization">
query optimizer
</a>
and lists the rejected
plans.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#std-label-executionStats">
<code class="leafygreen-ui-1l06pbn">
executionStats
</code>
</a>
, which details the execution of the winning
plan and the rejected plans.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#std-label-serverInfo">
<code class="leafygreen-ui-1l06pbn">
serverInfo
</code>
</a>
, which provides information on the
MongoDB instance.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
serverParameters
</code>
, which details internal parameters.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
The verbosity mode (i.e.
<code class="leafygreen-ui-1l06pbn">
queryPlanner
</code>
,
<code class="leafygreen-ui-1l06pbn">
executionStats
</code>
,
<code class="leafygreen-ui-1l06pbn">
allPlansExecution
</code>
) determines whether the results include
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#std-label-executionStats">
<code class="leafygreen-ui-1l06pbn">
executionStats
</code>
</a>
and whether
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#std-label-executionStats">
<code class="leafygreen-ui-1l06pbn">
executionStats
</code>
</a>
includes data
captured during
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-plans/#std-label-query-plans-query-optimization">
plan selection
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
Explain output is limited by the maximum
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/limits/#mongodb-limit-Nested-Depth-for-BSON-Documents">
Nested Depth for BSON Documents
</a>
, which is 100 levels of nesting. Explain output that exceeds
the limit is truncated.
</p>
<p class="leafygreen-ui-1kp3ins">
For details on the output, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/">
Explain Results
<!-- -->
.
</a>
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<span class="leafygreen-ui-1qnjd6d" id="std-label-ex-queryPlanner">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
queryPlanner
</code>
Mode
<a class="headerlink leafygreen-ui-1kepx47" href="#queryplanner-mode" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="queryplanner-mode">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
command runs in
<code class="leafygreen-ui-1l06pbn">
"queryPlanner"
</code>
verbosity mode to return the query planning information for a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/count/#mongodb-dbcommand-dbcmd.count">
<code class="leafygreen-ui-1l06pbn">
count
</code>
</a>
command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n explain: { count: \"products\", query: { quantity: { $gt: 50 } } },\n verbosity: \"queryPlanner\"\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">explain</span>: <!-- -->{ <span class="lg-highlight-attr">count</span>: <span class="lg-highlight-string">"products"</span>, <span class="lg-highlight-attr">query</span>: <!-- -->{ <span class="lg-highlight-attr">quantity</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">50</span> } } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">verbosity</span>: <span class="lg-highlight-string">"queryPlanner"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-ex-executionStats">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
executionStats
</code>
Mode
<a class="headerlink leafygreen-ui-1kepx47" href="#executionstats-mode" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="executionstats-mode">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
operation runs in
<code class="leafygreen-ui-1l06pbn">
"executionStats"
</code>
verbosity mode to return the query planning and execution information
for a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/count/#mongodb-dbcommand-dbcmd.count">
<code class="leafygreen-ui-1l06pbn">
count
</code>
</a>
command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n explain: { count: \"products\", query: { quantity: { $gt: 50 } } },\n verbosity: \"executionStats\"\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">explain</span>: <!-- -->{ <span class="lg-highlight-attr">count</span>: <span class="lg-highlight-string">"products"</span>, <span class="lg-highlight-attr">query</span>: <!-- -->{ <span class="lg-highlight-attr">quantity</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">50</span> } } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">verbosity</span>: <span class="lg-highlight-string">"executionStats"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-ex-allPlansExecution">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
allPlansExecution
</code>
Mode
<a class="headerlink leafygreen-ui-1kepx47" href="#allplansexecution-mode" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="allplansexecution-mode">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
By default,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
runs in
<code class="leafygreen-ui-1l06pbn">
"allPlansExecution"
</code>
verbosity
mode. The following
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.explain" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</span>
</a>
command returns the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.queryPlanner">
<code class="leafygreen-ui-1l06pbn">
queryPlanner
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.executionStats">
<code class="leafygreen-ui-1l06pbn">
executionStats
</code>
</a>
for
all considered plans for an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/update/#mongodb-dbcommand-dbcmd.update">
<code class="leafygreen-ui-1l06pbn">
update
</code>
</a>
command:
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The execution of this explain will
<em>
not
</em>
modify data but runs the
query predicate of the update operation. For candidate plans,
MongoDB returns the execution information captured during the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-plans/#std-label-query-plans-query-optimization">
plan selection phase
<!-- -->
.
</a>
</p>
</div>
</div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n explain: {\n update: \"products\",\n updates: [\n {\n q: { quantity: 1057, category: \"apparel\" },\n u: { $set: { reorder: true } }\n }\n ]\n }\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">explain</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <span class="lg-highlight-string">"products"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">q</span>: <!-- -->{ <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">1057</span>, <span class="lg-highlight-attr">category</span>: <span class="lg-highlight-string">"apparel"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">u</span>: <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">reorder</span>: <span class="lg-highlight-literal">true</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/schema-validation/specify-query-expression-rules/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Specify Validation With Query Operators
<a class="headerlink leafygreen-ui-1kepx47" href="#specify-validation-with-query-operators" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="specify-validation-with-query-operators">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#restrictions" target="_self">
<span>
Restrictions
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#context" target="_self">
<span>
Context
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#steps" target="_self">
<span>
Steps
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#additional-information" target="_self">
<span>
Additional Information
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#learn-more" target="_self">
<span>
Learn More
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
You can specify validation using query operators such as
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/eq/#mongodb-query-op.-eq">
<code class="leafygreen-ui-1l06pbn">
$eq
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/gt/#mongodb-query-op.-gt">
<code class="leafygreen-ui-1l06pbn">
$gt
</code>
</a>
to compare fields.
</p>
<p class="leafygreen-ui-1kp3ins">
A common use case for schema validation with query operators is when you
want to create dynamic validation rules that compare multiple field
values at runtime. For example, if you have a field that depends on the
value of another field and need to ensure that those values are
correctly proportional to each other.
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Restrictions
<a class="headerlink leafygreen-ui-1kepx47" href="#restrictions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="restrictions">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You can't specify the following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/#std-label-query-selectors">
query operators
</a>
in a
<code class="leafygreen-ui-1l06pbn">
validator
</code>
object:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/expr/#mongodb-query-op.-expr">
<code class="leafygreen-ui-1l06pbn">
$expr
</code>
</a>
with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/function/#mongodb-expression-exp.-function">
<code class="leafygreen-ui-1l06pbn">
$function
</code>
</a>
expressions
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/near/#mongodb-query-op.-near">
<code class="leafygreen-ui-1l06pbn">
$near
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/nearSphere/#mongodb-query-op.-nearSphere">
<code class="leafygreen-ui-1l06pbn">
$nearSphere
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/text/#mongodb-query-op.-text">
<code class="leafygreen-ui-1l06pbn">
$text
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/where/#mongodb-query-op.-where">
<code class="leafygreen-ui-1l06pbn">
$where
</code>
</a>
</p>
</li>
</ul>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You can't specify schema validation for:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Collections in the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
,
<code class="leafygreen-ui-1l06pbn">
local
</code>
, and
<code class="leafygreen-ui-1l06pbn">
config
</code>
databases
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#std-label-metadata-system-collections">
System collections
</a>
</p>
</li>
</ul>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Context
<a class="headerlink leafygreen-ui-1kepx47" href="#context" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="context">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Consider an application that tracks customer orders. The orders have a
base price and a
<span class="leafygreen-ui-vm4wms" tabindex="0">
VAT
</span>
. The
<code class="leafygreen-ui-1l06pbn">
orders
</code>
collection contains these fields to track total price:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
price
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
VAT
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
totalWithVAT
</code>
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Steps
<a class="headerlink leafygreen-ui-1kepx47" href="#steps" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="steps">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following procedure creates a schema validation with query operators
to ensure that
<code class="leafygreen-ui-1l06pbn">
totalWithVAT
</code>
matches the expected combination of
<code class="leafygreen-ui-1l06pbn">
price
</code>
and
<code class="leafygreen-ui-1l06pbn">
VAT
</code>
.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"HowTo","steps":[{"@type":"HowToStep","text":"Create an orders collection with schema validation:With this validation, you can only insert documents if the\ntotalWithVAT field equals total * (1 + VAT).","name":"Create a collection with validation."},{"@type":"HowToStep","text":"The following operation fails because the totalWithVAT field\ndoes not equal the correct value:141 * (1 + 0.20) equals 169.2, so the value of the\ntotalWithVAT field must be 169.2.The operation returns this error:","name":"Confirm that the validation prevents invalid documents."},{"@type":"HowToStep","text":"After updating the document to have the correct totalWithVAT\nvalue, the operation succeeds:MongoDB returns the following output, indicating that the insert\nwas successful:","name":"Make the document valid and insert it."}],"name":"Steps","image":"https://webimages.mongodb.com/_com_assets/cms/kuyj2focmkbxv7gh3-stacked_default_slate_blue.svg?auto=format%252Ccompress"}
</script>
<div class="css-qum8nr eccljxs0">
<div class="css-vq8pj5 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-18jxsvu e1ckbxcu2">
1
</div>
</div>
<div class="css-clrhqf">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Create a collection with validation.
<a class="headerlink leafygreen-ui-1kepx47" href="#create-a-collection-with-validation." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="create-a-collection-with-validation.">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Create an
<code class="leafygreen-ui-1l06pbn">
orders
</code>
collection with schema validation:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.createCollection( \"orders\",\n {\n validator: {\n $expr:\n {\n $eq: [\n \"$totalWithVAT\",\n { $multiply: [ \"$total\", { $sum:[ 1, \"$VAT\" ] } ] }\n ]\n }\n }\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">createCollection</span>( <span class="lg-highlight-string">"orders"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">validator</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$expr</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$eq</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"$totalWithVAT"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$multiply</span>: <!-- -->[ <span class="lg-highlight-string">"$total"</span>, <!-- -->{ <span class="lg-highlight-attr">$sum</span>:<!-- -->[ <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"$VAT"</span> ] } ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
With this validation, you can only insert documents if the
<code class="leafygreen-ui-1l06pbn">
totalWithVAT
</code>
field equals
<code class="leafygreen-ui-1l06pbn">
total * (1 + VAT)
</code>
.
</p>
</section>
</div>
</div>
<div class="css-vq8pj5 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-18jxsvu e1ckbxcu2">
2
</div>
</div>
<div class="css-clrhqf">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Confirm that the validation prevents invalid documents.
<a class="headerlink leafygreen-ui-1kepx47" href="#confirm-that-the-validation-prevents-invalid-documents." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="confirm-that-the-validation-prevents-invalid-documents.">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following operation fails because the
<code class="leafygreen-ui-1l06pbn">
totalWithVAT
</code>
field
does not equal the correct value:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.orders.insertOne( {\n total: NumberDecimal(\"141\"),\n VAT: NumberDecimal(\"0.20\"),\n totalWithVAT: NumberDecimal(\"169\")\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">orders</span>.<span class="lg-highlight-title lg-highlight-function">insertOne</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">total</span>: <span class="lg-highlight-title lg-highlight-class">NumberDecimal</span>(<span class="lg-highlight-string">"141"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">VAT</span>: <span class="lg-highlight-title lg-highlight-class">NumberDecimal</span>(<span class="lg-highlight-string">"0.20"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">totalWithVAT</span>: <span class="lg-highlight-title lg-highlight-class">NumberDecimal</span>(<span class="lg-highlight-string">"169"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
141 * (1 + 0.20) equals 169.2, so the value of the
<code class="leafygreen-ui-1l06pbn">
totalWithVAT
</code>
field must be 169.2.
</p>
<p class="leafygreen-ui-1kp3ins">
The operation returns this error:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"MongoServerError: Document failed validation\nAdditional information: {\n failingDocumentId: ObjectId(\"62bcc9b073c105dde9231293\"),\n details: {\n operatorName: '$expr',\n specifiedAs: {\n '$expr': {\n '$eq': [\n '$totalWithVAT',\n {\n '$multiply': [ '$total', { '$sum': [ 1, '$VAT' ] } ]\n }\n ]\n }\n },\n reason: 'expression did not match',\n expressionResult: false\n }\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">MongoServerError</span>: <span class="lg-highlight-title lg-highlight-class">Document</span> failed validation</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">Additional</span> <span class="lg-highlight-attr">information</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">failingDocumentId</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"62bcc9b073c105dde9231293"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">details</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">operatorName</span>: <span class="lg-highlight-string">'$expr'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">specifiedAs</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'$expr'</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'$eq'</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'$totalWithVAT'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'$multiply'</span>: <!-- -->[ <span class="lg-highlight-string">'$total'</span>, <!-- -->{ <span class="lg-highlight-string">'$sum'</span>: <!-- -->[ <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">'$VAT'</span> ] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">reason</span>: <span class="lg-highlight-string">'expression did not match'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">expressionResult</span>: <span class="lg-highlight-literal">false</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</div>
</div>
<div class="css-vq8pj5 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-18jxsvu e1ckbxcu2">
3
</div>
</div>
<div class="css-clrhqf">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Make the document valid and insert it.
<a class="headerlink leafygreen-ui-1kepx47" href="#make-the-document-valid-and-insert-it." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="make-the-document-valid-and-insert-it.">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
After updating the document to have the correct
<code class="leafygreen-ui-1l06pbn">
totalWithVAT
</code>
value, the operation succeeds:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.orders.insertOne( {\n total: NumberDecimal(\"141\"),\n VAT: NumberDecimal(\"0.20\"),\n totalWithVAT: NumberDecimal(\"169.2\")\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">orders</span>.<span class="lg-highlight-title lg-highlight-function">insertOne</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">total</span>: <span class="lg-highlight-title lg-highlight-class">NumberDecimal</span>(<span class="lg-highlight-string">"141"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">VAT</span>: <span class="lg-highlight-title lg-highlight-class">NumberDecimal</span>(<span class="lg-highlight-string">"0.20"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">totalWithVAT</span>: <span class="lg-highlight-title lg-highlight-class">NumberDecimal</span>(<span class="lg-highlight-string">"169.2"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
MongoDB returns the following output, indicating that the insert
was successful:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n acknowledged: true,\n insertedId: ObjectId(\"6304f4651e52f124b84479ba\")\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">acknowledged</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">insertedId</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"6304f4651e52f124b84479ba"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Additional Information
<a class="headerlink leafygreen-ui-1kepx47" href="#additional-information" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="additional-information">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can combine query operator validation with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/schema-validation/specify-json-schema/#std-label-schema-validation-json">
JSON Schema
validation
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
For example, consider a
<code class="leafygreen-ui-1l06pbn">
sales
</code>
collection with this schema
validation:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":" db.createCollection(\"sales\", {\n validator: {\n \"$and\": [\n // Validation with query operators\n {\n \"$expr\": {\n \"$lt\": [\"$lineItems.discountedPrice\", \"$lineItems.price\"]\n }\n },\n // Validation with JSON Schema\n {\n \"$jsonSchema\": {\n \"properties\": {\n \"items\": { \"bsonType\": \"array\" }\n }\n }\n }\n ]\n }\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"> db.<span class="lg-highlight-title lg-highlight-function">createCollection</span>(<span class="lg-highlight-string">"sales"</span>, <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">validator</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"$and"</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-comment">//</span><span class="lg-highlight-comment"> Validation with query </span><span class="lg-highlight-comment">operators</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"$expr"</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"$lt"</span>: <!-- -->[<span class="lg-highlight-string">"$lineItems.discountedPrice"</span>, <span class="lg-highlight-string">"$lineItems.price"</span>]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-comment">// Validation with JSON Schema</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"$jsonSchema"</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"properties"</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"items"</span>: <!-- -->{ <span class="lg-highlight-string">"bsonType"</span>: <span class="lg-highlight-string">"array"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The preceding validation enforces these rules for documents in the
<code class="leafygreen-ui-1l06pbn">
sales
</code>
collection:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
lineItems.discountedPrice
</code>
must be less than
<code class="leafygreen-ui-1l06pbn">
lineItems.price
</code>
.
This rule is specified using the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lt/#mongodb-expression-exp.-lt">
<code class="leafygreen-ui-1l06pbn">
$lt
</code>
</a>
operator.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
items
</code>
field must be an array. This rule is specified using
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/jsonSchema/#mongodb-query-op.-jsonSchema">
<code class="leafygreen-ui-1l06pbn">
$jsonSchema
</code>
.
</a>
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Learn More
<a class="headerlink leafygreen-ui-1kepx47" href="#learn-more" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="learn-more">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
To see all query operators available in MongoDB, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/#std-label-query-selectors">
Query Selectors
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
To learn more about the
<code class="leafygreen-ui-1l06pbn">
$expr
</code>
operator, which allows the use of
aggregation expressions within the query language, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/expr/#mongodb-query-op.-expr">
<code class="leafygreen-ui-1l06pbn">
$expr
</code>
.
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/defragment-sharded-collections/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Defragment Sharded Collections
<a class="headerlink leafygreen-ui-1kepx47" href="#defragment-sharded-collections" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="defragment-sharded-collections">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#before-you-begin" target="_self">
<span>
Before you Begin
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#tasks" target="_self">
<span>
Tasks
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#details" target="_self">
<span>
Details
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#learn-more" target="_self">
<span>
Learn More
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
Fragmentation is where a sharded collection's data is broken up into an
unnecessarily large number of small chunks. This can increase operation
times of CRUD operations run on that collection. Defragmentation reduces
the number of chunks by merging smaller chunks into larger ones,
resulting in lower CRUD operation times.
</p>
<p class="leafygreen-ui-1kp3ins">
If CRUD operation times are acceptable, you don't need to defragment
collections.
</p>
<p class="leafygreen-ui-1kp3ins">
The following table summarizes defragmentation information for various
MongoDB versions.
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:30%"/>
<col style="width:70%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
MongoDB Version
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
MongoDB 7.0 and later
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Chunks are automatically merged. Performance improvements from
defragmenting a collection in MongoDB 7.0 are lower compared to
MongoDB 6.0. Typically, you don't need to defragment collections
starting in MongoDB 7.0.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
MongoDB 6.0 and earlier than 7.0
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Defragment collections only if you experience CRUD operation
delays when the balancer migrates chunks or a node starts.
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, high write traffic should not cause
fragmentation. Chunk migrations cause fragmentation.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Earlier than MongoDB 6.0
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Defragment collections only if you experience longer CRUD
operation times during metadata updates. For MongoDB versions
earlier than 6.0, a sharded collection becomes fragmented when
the collection size grows significantly because of many insert or
update operations.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
To defragment a sharded collection, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/configureCollectionBalancing/#mongodb-dbcommand-dbcmd.configureCollectionBalancing">
<code class="leafygreen-ui-1l06pbn">
configureCollectionBalancing
</code>
</a>
command's
<code class="leafygreen-ui-1l06pbn">
defragmentCollection
</code>
option. The option is available starting in
MongoDB 6.0.
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Before you Begin
<a class="headerlink leafygreen-ui-1kepx47" href="#before-you-begin" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="before-you-begin">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Consider these issues before you defragment collections:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Defragmentation might cause many metadata updates on the shards. If
your CRUD operations are already taking longer than usual during
migrations, you should only run defragmentation during a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/manage-sharded-cluster-balancer/#std-label-sharding-schedule-balancing-window">
shard
balancing window
</a>
to reduce the
system workload.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If defragmentation is impacting workload and CRUD latency on the
cluster, you can reduce the impact using the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.chunkDefragmentationThrottlingMS">
<code class="leafygreen-ui-1l06pbn">
chunkDefragmentationThrottlingMS
</code>
</a>
parameter.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Merged chunks lose their placement history.
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
This means that while defragmentation is running, snapshot reads and
indirectly, transactions, could fail with stale chunk history
errors.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Placement history records the shards that a chunk was stored on.
Defragmentation erases the placement history and some operations
could fail, but will typically resolve after around five minutes.
</p>
</li>
</ul>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Defragmentation affects the locality of the documents in a collection
by moving data between shards. If a collection has ranges of data that
are frequently accessed, after defragmenting the collection it is
possible that the frequently accessed data will be on one shard. This
might decrease the performance of CRUD operations by placing the
workload on one shard instead of multiple shards.
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Tasks
<a class="headerlink leafygreen-ui-1kepx47" href="#tasks" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="tasks">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/defragment-sharded-collections/start-defragmenting-sharded-collection/#std-label-start-defragmenting-sharded-collection">
Manually start defragmenting a sharded collection
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/defragment-sharded-collections/monitor-defragmentation-sharded-collection/#std-label-monitor-defragmentation-sharded-collection">
Monitor defragmentation of a sharded collection
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/defragment-sharded-collections/stop-defragmenting-sharded-collection/#std-label-stop-defragmenting-sharded-collection">
Manually stop defragmenting a sharded collection
</a>
</p>
</li>
</ul>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Typically, you should use a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/manage-sharded-cluster-balancer/#std-label-sharding-schedule-balancing-window">
shard balancing window
</a>
to specify when the balancer
runs instead of manually starting and stopping defragmentation.
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Details
<a class="headerlink leafygreen-ui-1kepx47" href="#details" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="details">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This section describes additional details related to defragmenting
sharded collections.
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Configure Collection Balancing Status
<a class="headerlink leafygreen-ui-1kepx47" href="#configure-collection-balancing-status" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="configure-collection-balancing-status">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
defragmentCollection
</code>
field returned by the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/configureCollectionBalancing/#mongodb-dbcommand-dbcmd.configureCollectionBalancing">
<code class="leafygreen-ui-1l06pbn">
configureCollectionBalancing
</code>
</a>
command is only
<code class="leafygreen-ui-1l06pbn">
true
</code>
when
defragmentation is running.
</p>
<p class="leafygreen-ui-1kp3ins">
After defragmentation automatically ends or you manually stop
defragmentation, the
<code class="leafygreen-ui-1l06pbn">
defragmentCollection
</code>
field is removed from the
returned document.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#operations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="operations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Secondary node reads are permitted during defragmentation, but might
take longer to complete until metadata updates on the primary node are
replicated to the secondary nodes.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Chunk Size, Balancing, and Defragmentation
<a class="headerlink leafygreen-ui-1kepx47" href="#chunk-size--balancing--and-defragmentation" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="chunk-size--balancing--and-defragmentation">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
For details about the MongoDB balancer, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-balancer-administration/#std-label-sharding-balancing">
Sharded Cluster Balancer
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
For an introduction to
<code class="leafygreen-ui-1l06pbn">
chunkSize
</code>
, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/modify-chunk-size-in-sharded-cluster/#std-label-tutorial-modifying-chunk-size">
Modify Range Size in a Sharded Cluster
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following table describes how
<code class="leafygreen-ui-1l06pbn">
chunkSize
</code>
affects defragmentation
and the balancer operations in different MongoDB versions.
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:30%"/>
<col style="width:70%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
MongoDB Version
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
MongoDB 6.0 and later
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
When the collection data shared between two shards differs by
three or more times the configured
<code class="leafygreen-ui-1l06pbn">
chunkSize
</code>
setting, the
balancer migrates chunks between the shards.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, if
<code class="leafygreen-ui-1l06pbn">
chunkSize
</code>
is 128 MB and the collection data
differs by 384 MB or more, the balancer migrates chunks between
the shards.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Earlier than MongoDB 6.0
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
When a chunk grows larger than
<code class="leafygreen-ui-1l06pbn">
chunkSize
</code>
, the chunk is split.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
When chunks are moved, split, or merged, the shard metadata is updated
after the chunk operation is committed by a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharded-cluster-config-servers/#std-label-sharding-config-server">
config server
</a>
. Shards not involved in the chunk operation
are also updated with new metadata.
</p>
<p class="leafygreen-ui-1kp3ins">
The time for the shard metadata update is proportional to the size of
the routing table. CRUD operations on the collection are temporarily
blocked while the shard metadata is updated, and a smaller routing table
means shorter CRUD operation delays.
</p>
<p class="leafygreen-ui-1kp3ins">
Defragmenting a collection reduces the number of chunks and the time to
update the chunk metadata.
</p>
<p class="leafygreen-ui-1kp3ins">
To reduce the system workload, configure the balancer to run only at a
specific time using a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/manage-sharded-cluster-balancer/#std-label-sharding-schedule-balancing-window">
shard balancing window
</a>
. Defragmentation runs during the
balancing window time period.
</p>
<p class="leafygreen-ui-1kp3ins">
You can use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.chunkDefragmentationThrottlingMS">
<code class="leafygreen-ui-1l06pbn">
chunkDefragmentationThrottlingMS
</code>
</a>
parameter
to limit the rate of split and merge commands run by the balancer.
</p>
<p class="leafygreen-ui-1kp3ins">
You can start and stop defragmentation at any time.
</p>
<p class="leafygreen-ui-1kp3ins">
You can also set a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/zone-sharding/#std-label-zone-sharding">
shard zone
</a>
. A shard zone is
based on the shard key, and you can associate each zone with one or more
shards in a cluster.
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, a sharded cluster only splits chunks when
chunks must be migrated. This means the chunk size may exceed
<code class="leafygreen-ui-1l06pbn">
chunkSize
</code>
. Larger chunks reduce the number of chunks on a shard and
improve performance because the time to update the shard metadata is
reduced. For example, you might see a 1 TB chunk on a shard even though
you have set
<code class="leafygreen-ui-1l06pbn">
chunkSize
</code>
to 256 MB.
</p>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
chunkSize
</code>
affects the following:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Maximum amount of data the balancer attempts to migrate between two
shards in a single chunk migration operation.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Amount of data migrated during defragmentation.
</p>
</li>
</ul>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Learn More
<a class="headerlink leafygreen-ui-1kepx47" href="#learn-more" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="learn-more">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Introduction to sharding, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/sharding/#std-label-sharding-introduction">
Sharding
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Partition data with chunks, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-data-partitioning/#std-label-sharding-data-partitioning">
Data Partitioning with Chunks
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Configure collection balancing, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/configureCollectionBalancing/#mongodb-dbcommand-dbcmd.configureCollectionBalancing">
<code class="leafygreen-ui-1l06pbn">
configureCollectionBalancing
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Examine balancer collection status, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/balancerCollectionStatus/#mongodb-dbcommand-dbcmd.balancerCollectionStatus">
<code class="leafygreen-ui-1l06pbn">
balancerCollectionStatus
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Configure shard balancing windows, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/manage-sharded-cluster-balancer/#std-label-sharding-schedule-balancing-window">
Schedule the Balancing Window
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Monitor shards using MongoDB Atlas, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/review-sharded-cluster-metrics/#review-sharded-clusters/" target="_self">
<span>
Review Sharded Clusters
</span>
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/faq/sharding/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
FAQ: Sharding with MongoDB
<a class="headerlink leafygreen-ui-1kepx47" href="#faq--sharding-with-mongodb" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="faq--sharding-with-mongodb">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#is-sharding-appropriate-for-a-new-deployment-" target="_self">
<span>
Is sharding appropriate for a new deployment?
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#can-i-select-a-different-shard-key-after-sharding-a-collection-" target="_self">
<span>
Can I select a different shard key after sharding a collection?
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#why-are-my-documents-not-distributed-across-the-shards-" target="_self">
<span>
Why are my documents not distributed across the shards?
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#how-does-mongos-detect-changes-in-the-sharded-cluster-configuration-" target="_self">
<span>
How does
<code class="css-1kekw28 e1wawog0">
mongos
</code>
detect changes in the sharded cluster configuration?
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#how-does-mongos-use-connections-" target="_self">
<span>
How does
<code class="css-1kekw28 e1wawog0">
mongos
</code>
use connections?
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
This document answers common questions about
<a class="leafygreen-ui-tqgtui" href="/docs/manual/sharding/">
Sharding
</a>
. See also
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/sharding/">
Sharding
</a>
section in the manual, which provides an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/sharding/#std-label-sharding-background">
overview of sharding
</a>
, including details on:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-shard-key/#std-label-sharding-shard-key">
Shard Keys and Considerations for Shard Key Selection
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharded-cluster-query-router/#std-label-sharding-read-operations">
Query Routing
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/sharding/#std-label-sharding-availability">
High Availability
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-data-partitioning/">
Data Partitioning with Chunks
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-balancer-administration/#std-label-sharding-balancing">
Chunk Migration Process
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/troubleshoot-sharded-clusters/">
Troubleshoot Sharded Clusters
</a>
</p>
</li>
</ul>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Is sharding appropriate for a new deployment?
<a class="headerlink leafygreen-ui-1kepx47" href="#is-sharding-appropriate-for-a-new-deployment-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="is-sharding-appropriate-for-a-new-deployment-">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Sometimes. However, if your data set fits on a single server, you
should begin with an unsharded deployment as sharding while your data
set is small provides
<em>
little advantage
</em>
.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-faq-change-shard-key">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Can I select a different shard key after sharding a collection?
<a class="headerlink leafygreen-ui-1kepx47" href="#can-i-select-a-different-shard-key-after-sharding-a-collection-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="can-i-select-a-different-shard-key-after-sharding-a-collection-">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Your options for changing a shard key depend on the version of MongoDB
that you are running:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0, you can
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-reshard-a-collection/#std-label-sharding-resharding">
reshard a collection
</a>
by changing a document's shard key.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You can
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-refine-a-shard-key/#std-label-shard-key-refine">
refine a shard key
</a>
by adding a suffix field
or fields to the existing shard key.
</p>
</li>
</ul>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-shard-key/">
Shard Keys
</a>
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Why are my documents not distributed across the shards?
<a class="headerlink leafygreen-ui-1kepx47" href="#why-are-my-documents-not-distributed-across-the-shards-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="why-are-my-documents-not-distributed-across-the-shards-">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The balancer starts distributing data across the shards once the
distribution of chunks has reached certain thresholds. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-balancer-administration/#std-label-sharding-migration-thresholds">
Migration Thresholds
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
In addition, MongoDB cannot move a chunk if the number of documents in
the chunk exceeds a certain number. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-balancer-administration/#std-label-migration-chunk-size-limit">
Maximum Number of Documents Per Range to Migrate
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-data-partitioning/#std-label-jumbo-chunk">
Indivisible/Jumbo Chunks
<!-- -->
.
</a>
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
How does
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
detect changes in the sharded cluster configuration?
<a class="headerlink leafygreen-ui-1kepx47" href="#how-does-mongos-detect-changes-in-the-sharded-cluster-configuration-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="how-does-mongos-detect-changes-in-the-sharded-cluster-configuration-">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
instances maintain a cache of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-config-database">
config database
</a>
that holds the metadata for the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-sharded-cluster">
sharded cluster
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
updates its cache lazily by issuing a request to a
shard and discovering that its metadata is out of date. To force the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
to reload its cache, you can run the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/flushRouterConfig/#mongodb-dbcommand-dbcmd.flushRouterConfig">
<code class="leafygreen-ui-1l06pbn">
flushRouterConfig
</code>
</a>
command against each
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
directly.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
How does
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
use connections?
<a class="headerlink leafygreen-ui-1kepx47" href="#how-does-mongos-use-connections-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="how-does-mongos-use-connections-">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Each
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
instance maintains a pool of connections to the
members of the sharded cluster. Client requests use these connections
one at a time; i.e. requests are not multiplexed or pipelined.
</p>
<p class="leafygreen-ui-1kp3ins">
When client requests complete, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
returns the
connection to the pool. These pools do not shrink when the number of
clients decreases. This can lead to an unused
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
with a
large number of open connections. If the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
is no longer
in use, it is safe to restart the process to close existing connections.
</p>
<p class="leafygreen-ui-1kp3ins">
To return aggregated statistics related to all of the outgoing
connection pools used by the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
, connect
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
, and run the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/connPoolStats/#mongodb-dbcommand-dbcmd.connPoolStats">
<code class="leafygreen-ui-1l06pbn">
connPoolStats
</code>
</a>
command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.adminCommand(\"connPoolStats\");","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.adminCommand(<span class="lg-highlight-string">"connPoolStats"</span>);</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
See the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/ulimit/#std-label-system-resource-utilization">
System Resource Utilization
</a>
section of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/ulimit/">
UNIX
<code class="leafygreen-ui-1l06pbn">
ulimit
</code>
Settings for Self-Managed Deployments
</a>
document.
</p>
</section>
</section>
|
https://www.mongodb.com/docs/manual/release-notes/6.0/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Release Notes for MongoDB 6.0
<a class="headerlink leafygreen-ui-1kepx47" href="#release-notes-for-mongodb-6.0" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="release-notes-for-mongodb-6.0">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#patch-releases" target="_self">
<span>
Patch Releases
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#aggregation" target="_self">
<span>
Aggregation
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#change-streams" target="_self">
<span>
Change Streams
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#cluster-administration" target="_self">
<span>
Cluster Administration
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#clustered-collections" target="_self">
<span>
Clustered Collections
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#indexes" target="_self">
<span>
Indexes
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#installation" target="_self">
<span>
Installation
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#replica-sets" target="_self">
<span>
Replica Sets
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#security" target="_self">
<span>
Security
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#sharding" target="_self">
<span>
Sharding
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#slot-based-query-execution-engine" target="_self">
<span>
Slot-Based Query Execution Engine
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#stable-api" target="_self">
<span>
Stable API
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#time-series-collections" target="_self">
<span>
Time Series Collections
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#general-improvements" target="_self">
<span>
General Improvements
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#changes-affecting-compatibility" target="_self">
<span>
Changes Affecting Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#upgrade-procedures" target="_self">
<span>
Upgrade Procedures
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#downgrade-consideration" target="_self">
<span>
Downgrade Consideration
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#download" target="_self">
<span>
Download
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#known-issues" target="_self">
<span>
Known Issues
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#report-an-issue" target="_self">
<span>
Report an Issue
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
This page describes changes and new features introduced in MongoDB 6.0.
</p>
<p class="leafygreen-ui-1kp3ins">
MongoDB 6.0 is a
<!-- -->
Major
<!-- -->
Release, which means that it is supported for
both MongoDB Atlas and on-premises deployments. MongoDB 6.0 includes
changes introduced in MongoDB Rapid Releases 5.1, 5.2, and 5.3. This
page describes changes introduced in those Rapid Releases and MongoDB
6.0.
</p>
<p class="leafygreen-ui-1kp3ins">
To learn more about the differences between
<!-- -->
Major
<!-- -->
and Rapid releases,
see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/versioning/#std-label-release-version-numbers">
MongoDB Versioning
<!-- -->
.
</a>
</p>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
Past Release Limitations
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The Critical Advisories below affect some prior MongoDB versions. If your
deployment depends on features impacted by a Critical Advisory, upgrade to
the latest available patch release.
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Issue
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Affected Versions
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-68511" rel="noopener noreferrer">
<span>
SERVER-68511
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
6.0.0
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-77506" rel="noopener noreferrer">
<span>
SERVER-77506
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
6.0.0 - 6.0.12
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-80203" rel="noopener noreferrer">
<span>
SERVER-80203
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
6.0.0 - 6.0.11 (Time Series collections sharded by metaField embedded
objects)
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-82353" rel="noopener noreferrer">
<span>
SERVER-82353
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
6.0.0 - 6.0.13
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-10461" rel="noopener noreferrer">
<span>
WT-10461
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
6.0.0 - 6.0.4 (ARM64 or POWER system architectures)
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-10551" rel="noopener noreferrer">
<span>
WT-10551
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
6.0.0 - 6.0.5 (Incremental backups on Ops Manager or Cloud
Manager clusters)
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Patch Releases
<a class="headerlink leafygreen-ui-1kepx47" href="#patch-releases" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="patch-releases">
</div>
</a>
</h2>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.18-release-notes">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.18 - Sep 30, 2024
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.18---sep-30--2024" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.18---sep-30--2024">
</div>
</a>
</h3>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-70508" rel="noopener noreferrer">
<span>
SERVER-70508
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Add current thread count to extra_info in serverStatus
on Linux
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-94166" rel="noopener noreferrer">
<span>
SERVER-94166
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Disable the SBE query engine in v6.0
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-94170" rel="noopener noreferrer">
<span>
SERVER-94170
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Revert
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-91570" rel="noopener noreferrer">
<span>
SERVER-91570
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D6.0.18" rel="noopener noreferrer">
<span>
All Jira issues closed in 6.0.18
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.18-changelog">
6.0.18 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.17-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.17 - Aug 21, 2024
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.17---aug-21--2024" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.17---aug-21--2024">
</div>
</a>
</h3>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
Fix for CSFLE and Queryable Encryption self-lookup may send values in subpipelines as plaintext instead of ciphertext
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Due to CVE-2024-8013, in
<!-- -->
MongoDB 6.0 prior to 6.0.16
<!-- -->
, a bug in query analysis of
certain complex self-referential
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lookup/#mongodb-pipeline-pipe.-lookup">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
</a>
subpipelines
may result in literal values in expressions for encrypted fields
being sent to the server malformed.
</p>
<p class="leafygreen-ui-1kp3ins">
Should this occur, no documents are returned or written.
This issue affects the
<code class="leafygreen-ui-1l06pbn">
mongocryptd
</code>
binary and
<code class="leafygreen-ui-1l06pbn">
mongo_crypt_v1
</code>
shared library in the following MongoDB Server versions:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
7.3.0 - 7.3.3
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
7.0.0 - 7.0.11
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
6.0.0 - 6.0.16
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
5.0.0 - 5.0.28
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
<strong>
CVSS Score
</strong>
: 2.2
</p>
<p class="leafygreen-ui-1kp3ins">
<strong>
CWE
</strong>
: CWE-319: Cleartext Transmission of Sensitive Information
</p>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-96254" rel="noopener noreferrer">
<span>
SERVER-96254
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
CSFLE and Queryable Encryption self-lookup may
fail to encrypt values in subpipelines
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-85892" rel="noopener noreferrer">
<span>
SERVER-85892
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
$merge with pipeline after $documents returns
error
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-91195" rel="noopener noreferrer">
<span>
SERVER-91195
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Provide a generic backportable solution not
to miss top-level timeseries collection options
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-91362" rel="noopener noreferrer">
<span>
SERVER-91362
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Performance: Do not copy JS "scope" object
if a cached JsExecution exists
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-91406" rel="noopener noreferrer">
<span>
SERVER-91406
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
$changeStreamSplitLargeEvent returns
Location7182803 error when used with non-renameable match expression
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-12708" rel="noopener noreferrer">
<span>
WT-12708
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Evaluation/Revision of eviction random traversal
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D6.0.17" rel="noopener noreferrer">
<span>
All Jira issues closed in 6.0.17
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.17-changelog">
6.0.17 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.16-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.16 - Jun 28, 2024
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.16---jun-28--2024" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.16---jun-28--2024">
</div>
</a>
</h3>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-79637" rel="noopener noreferrer">
<span>
SERVER-79637
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Incorrect query results in
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
with TS
foreign collection using a correlated predicate
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-86474" rel="noopener noreferrer">
<span>
SERVER-86474
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
$_internalApplyOplogUpdate with
<code class="leafygreen-ui-1l06pbn">
$set: { foo:
Timestamp(0, 0) }
</code>
is not replicated correctly
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-89625" rel="noopener noreferrer">
<span>
SERVER-89625
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Handle directoryPerDb and
wiredTigerDirectoryForIndexes correctly when reporting namespaces and
UUIDs during a backup
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-10807" rel="noopener noreferrer">
<span>
WT-10807
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Skip in-memory deleted pages as part of the tree
walk
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-12609" rel="noopener noreferrer">
<span>
WT-12609
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Improve checkpoint cleanup and page eviction logic
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%276.0.16%27" rel="noopener noreferrer">
<span>
All Jira issues closed in 6.0.16
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.16-changelog">
6.0.16 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.15-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.15 - Apr 18, 2024
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.15---apr-18--2024" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
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</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.15---apr-18--2024">
</div>
</a>
</h3>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-72703" rel="noopener noreferrer">
<span>
SERVER-72703
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Downgrade $out's db lock to MODE_IX
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-78556" rel="noopener noreferrer">
<span>
SERVER-78556
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Return default of internalInsertMaxBatchSize to 64
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-80363" rel="noopener noreferrer">
<span>
SERVER-80363
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
server default writeConcern is not honored when wtimeout
is set
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-83602" rel="noopener noreferrer">
<span>
SERVER-83602
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
$or -> $in MatchExpression rewrite should not generate
$or directly nested in another $or
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-11062" rel="noopener noreferrer">
<span>
WT-11062
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Safe free the ref addr to allow concurrent access
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%276.0.15%27" rel="noopener noreferrer">
<span>
All Jira issues closed in 6.0.15
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.15-changelog">
6.0.15 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.14-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.14 - Feb 28, 2024
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.14---feb-28--2024" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.14---feb-28--2024">
</div>
</a>
</h3>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
Fix for MongoDB Server may allow successful untrusted connection
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Due to CVE-2024-1351, in
<!-- -->
MongoDB 6.0 prior to 6.0.14
<!-- -->
, under certain
configurations of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--tlsCAFile">
<code class="leafygreen-ui-1l06pbn">
--tlsCAFile
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-net.tls.CAFile">
<code class="leafygreen-ui-1l06pbn">
CAFile
</code>
</a>
, MongoDB Server may skip peer certificate
validation which may result in untrusted connections to succeed.
</p>
<p class="leafygreen-ui-1kp3ins">
This may effectively reduce the security guarantees provided by TLS
and open connections that should have been closed due to failing
certificate validation. This issue affects the following MongoDB
Server versions:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
7.0.0 - 7.0.5
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
6.0.0 - 6.0.13
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
5.0.0 - 5.0.24
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
4.4.0 - 4.4.28
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
<strong>
CVSS Score
</strong>
: 8.8
</p>
<p class="leafygreen-ui-1kp3ins">
<strong>
CWE
</strong>
: CWE-295: Improper Certificate Validation
</p>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-82353" rel="noopener noreferrer">
<span>
SERVER-82353
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Multi-document transactions can miss documents
when movePrimary runs concurrently
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-83119" rel="noopener noreferrer">
<span>
SERVER-83119
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Secondary replica crashes on clustered
collection if notablescan is enabled
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-83145" rel="noopener noreferrer">
<span>
SERVER-83145
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Shared buffer fragment incorrectly tracks
memory usage in freeUnused()
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-83564" rel="noopener noreferrer">
<span>
SERVER-83564
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Make sure the process field is indexed in
config.locks
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-12077" rel="noopener noreferrer">
<span>
WT-12077
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Incorrect hardware checksum calculation on zSeries
for buffers on stack
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%276.0.14%27" rel="noopener noreferrer">
<span>
All Jira issues closed in 6.0.14
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.14-changelog">
6.0.14 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.13-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.13 - Jan 18, 2024
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.13---jan-18--2024" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.13---jan-18--2024">
</div>
</a>
</h3>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-33494" rel="noopener noreferrer">
<span>
SERVER-33494
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
WT SizeStorer never deletes old entries
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-50792" rel="noopener noreferrer">
<span>
SERVER-50792
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Return more useful errors when a shard key index
can't be found for shardCollection/refineCollectionShardKey
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-70155" rel="noopener noreferrer">
<span>
SERVER-70155
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Add duration of how long an oplog slot is kept
open to mongod "Slow query" log lines
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-77506" rel="noopener noreferrer">
<span>
SERVER-77506
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Sharded multi-document transactions can mismatch
data and ShardVersion
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-83091" rel="noopener noreferrer">
<span>
SERVER-83091
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
$or query can trigger an infinite loop during
plan enumeration
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%276.0.13%27" rel="noopener noreferrer">
<span>
All Jira issues closed in 6.0.13
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.13-changelog">
6.0.13 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.12-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.12 - Nov 27, 2023
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.12---nov-27--2023" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
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</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.12---nov-27--2023">
</div>
</a>
</h3>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-69244" rel="noopener noreferrer">
<span>
SERVER-69244
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
$merge fails when session default read concern
has been set to "majority"
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-81295" rel="noopener noreferrer">
<span>
SERVER-81295
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Cannot resume V2 changeStream pipelines with V1
resume tokens
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-81966" rel="noopener noreferrer">
<span>
SERVER-81966
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Avoid modification of previous ChunkMap
instances during refresh
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-7929" rel="noopener noreferrer">
<span>
WT-7929
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Investigate a solution to avoid FTDC stalls during
checkpoint
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-11564" rel="noopener noreferrer">
<span>
WT-11564
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Fix RTS to read the newest transaction value only
when it exists in the checkpoint
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%276.0.12%27" rel="noopener noreferrer">
<span>
All Jira issues closed in 6.0.12
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.12-changelog">
6.0.12 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.11-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.11 - Oct 11, 2023
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.11---oct-11--2023" title="Permalink to this heading">
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<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
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</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.11---oct-11--2023">
</div>
</a>
</h3>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-58534" rel="noopener noreferrer">
<span>
SERVER-58534
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Collect fCV in FTDC
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-69244" rel="noopener noreferrer">
<span>
SERVER-69244
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
$merge fails when session default read concern has been
set to "majority"
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-71520" rel="noopener noreferrer">
<span>
SERVER-71520
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Dump all thread stacks on RSTL acquisition timeout
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-79498" rel="noopener noreferrer">
<span>
SERVER-79498
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Backport $vectorSearch to 6.0
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-80021" rel="noopener noreferrer">
<span>
SERVER-80021
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Make $convert round-trip correctly between double and string
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-81762?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D6.0.11" rel="noopener noreferrer">
<span>
All Jira issues closed in 6.0.11
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.11-changelog">
6.0.11 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.10-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.10 - Sep 14, 2023
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.10---sep-14--2023" title="Permalink to this heading">
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<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.10---sep-14--2023">
</div>
</a>
</h3>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-71627" rel="noopener noreferrer">
<span>
SERVER-71627
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Refreshed cached collection route info severely
blocks all client request when a cluster contains 1 million chunks
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-73394" rel="noopener noreferrer">
<span>
SERVER-73394
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Remove misleading operationsBlockedByRefresh metrics
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-77183" rel="noopener noreferrer">
<span>
SERVER-77183
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
$project followed by $group sometimes gives incorrect
results
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-79771" rel="noopener noreferrer">
<span>
SERVER-79771
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Make resharding operations resilient to
networkInterfaceExceededTimeLimit
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-80810?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D6.0.10" rel="noopener noreferrer">
<span>
All Jira issues closed in 6.0.10
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.10-changelog">
6.0.10 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.9-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.9 - Aug 14, 2023
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.9---aug-14--2023" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.9---aug-14--2023">
</div>
</a>
</h3>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-60466" rel="noopener noreferrer">
<span>
SERVER-60466
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Support drivers gossiping signed $clusterTimes to
replica set --shardsvrs before addShard runs
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-74954" rel="noopener noreferrer">
<span>
SERVER-74954
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Incorrect result when contained $or rewrites
$elemMatch extra condition
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-79136" rel="noopener noreferrer">
<span>
SERVER-79136
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Incorrect query result of $match + $group on metaField
over time-series
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-10759" rel="noopener noreferrer">
<span>
WT-10759
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Do not retry to force evict history store pages during
reconciliation
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-11064" rel="noopener noreferrer">
<span>
WT-11064
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Skip globally visible tombstones as part of update obsolete
check
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%276.0.9%27" rel="noopener noreferrer">
<span>
All Jira issues closed in 6.0.9
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.9-changelog">
6.0.9 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.8-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.8 - Jul 13, 2023
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.8---jul-13--2023" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.8---jul-13--2023">
</div>
</a>
</h3>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-61127" rel="noopener noreferrer">
<span>
SERVER-61127
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Multi-writes may exhaust the number of retry attempts
in the presence of ongoing chunk migrations
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-77005" rel="noopener noreferrer">
<span>
SERVER-77005
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Leave LDAP users logged-in during LDAP downtime
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-78126" rel="noopener noreferrer">
<span>
SERVER-78126
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
For specific kinds of input, mongo::Value() always hashes to the same result on big-endian platforms
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%276.0.8%27" rel="noopener noreferrer">
<span>
All Jira issues closed in 6.0.8
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.8-changelog">
6.0.8 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.7-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.7 - Jun 28, 2023
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.7---jun-28--2023" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
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</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.7---jun-28--2023">
</div>
</a>
</h3>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-71985" rel="noopener noreferrer">
<span>
SERVER-71985
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Automatically retry time series insert on DuplicateKey
error
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-73007" rel="noopener noreferrer">
<span>
SERVER-73007
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
CURL_OPT_SEEKFUNCTION not set for multi-pass
authentication
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-74551" rel="noopener noreferrer">
<span>
SERVER-74551
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
WriteConflictException unnecessarily logged as warning
during findAndModify after upgrade to mongo 5.0
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-77018" rel="noopener noreferrer">
<span>
SERVER-77018
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Deadlock between dbStats and 2 index builds
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-10449" rel="noopener noreferrer">
<span>
WT-10449
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Do not save update chain when there are no updates
to be written to the history store
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-11031" rel="noopener noreferrer">
<span>
WT-11031
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Fix RTS to skip tables with no time window information
in the checkpoint
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%276.0.7%27" rel="noopener noreferrer">
<span>
All Jira issues closed in 6.0.7
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.7-changelog">
6.0.7 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.6-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.6 - May 12, 2023
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.6---may-12--2023" title="Permalink to this heading">
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<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
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</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.6---may-12--2023">
</div>
</a>
</h3>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-51835" rel="noopener noreferrer">
<span>
SERVER-51835
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Mongos readPreferenceTags are not working as expected
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-67105" rel="noopener noreferrer">
<span>
SERVER-67105
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
$in queries do not use clustered index
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-72774" rel="noopener noreferrer">
<span>
SERVER-72774
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
A node in quiesce mode can win election
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-74930" rel="noopener noreferrer">
<span>
SERVER-74930
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
$avg is returning the sum instead of the average in aggregate $group
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-75205" rel="noopener noreferrer">
<span>
SERVER-75205
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Deadlock between stepdown and restoring locks after yielding when all read tickets exhausted
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%276.0.6%27" rel="noopener noreferrer">
<span>
All Jira issues closed in 6.0.6
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.6-changelog">
6.0.6 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.5-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.5 - Mar 13, 2023
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.5---mar-13--2023" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.5---mar-13--2023">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Issues Fixed:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-61909" rel="noopener noreferrer">
<span>
SERVER-61909
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Hang inserting or deleting document with large
number of index entries
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-66469" rel="noopener noreferrer">
<span>
SERVER-66469
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Filtering timeseries with date-field does not
include results from before 1970
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-68122" rel="noopener noreferrer">
<span>
SERVER-68122
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Investigate replicating the collection
WiredTiger config string during initial sync
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-70395" rel="noopener noreferrer">
<span>
SERVER-70395
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Slot-Based Engine too aggressively uses disk for
$group and is slow
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-73232" rel="noopener noreferrer">
<span>
SERVER-73232
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Change the default log-verbosity for
<code class="leafygreen-ui-1l06pbn">
_killOperations
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%276.0.5%27" rel="noopener noreferrer">
<span>
All JIRA issues closed in 6.0.5
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.5-changelog">
6.0.5 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.4-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.4 - Jan 26, 2023
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.4---jan-26--2023" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.4---jan-26--2023">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Issues Fixed:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-72416" rel="noopener noreferrer">
<span>
SERVER-72416
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
The find and findAndModify projection code
does not honor the collection level collation
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-71759" rel="noopener noreferrer">
<span>
SERVER-71759
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/dataSize/#mongodb-dbcommand-dbcmd.dataSize">
<code class="leafygreen-ui-1l06pbn">
dataSize
</code>
</a>
command doesn't yield
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-70237" rel="noopener noreferrer">
<span>
SERVER-70237
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Chunks merge commit must not create a BSON
object too large
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-72222" rel="noopener noreferrer">
<span>
SERVER-72222
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/mapReduce/#mongodb-dbcommand-dbcmd.mapReduce">
<code class="leafygreen-ui-1l06pbn">
mapReduce
</code>
</a>
with single reduce
optimization fails when merging results in sharded cluster
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-9268" rel="noopener noreferrer">
<span>
WT-9268
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Delay deletion of the history store record
to reconciliation
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%276.0.4%27" rel="noopener noreferrer">
<span>
All JIRA issues closed in 6.0.4
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.4-changelog">
6.0.4 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.3-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.3 - Nov 21, 2022
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.3---nov-21--2022" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.3---nov-21--2022">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Issues fixed:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-66289" rel="noopener noreferrer">
<span>
SERVER-66289
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
$out incorrectly throws BSONObj size error on
v5.0.8
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-68139" rel="noopener noreferrer">
<span>
SERVER-68139
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Resharding command fails if the projection sort
is bigger than 100MB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-68371" rel="noopener noreferrer">
<span>
SERVER-68371
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Enabling CSFLE in your MongoClient causes Atlas
Search to fail
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-68115" rel="noopener noreferrer">
<span>
SERVER-68115
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Bug fix for "elemMatchRootLength > 0" invariant
trigger
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-68394" rel="noopener noreferrer">
<span>
SERVER-68394
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Ensure we do not yield strong locks upon startup
recovery when _id index is missing
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%276.0.3%27" rel="noopener noreferrer">
<span>
All JIRA issues closed in 6.0.3
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.3-changelog">
6.0.3 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.2-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.2 - Sep 28, 2022
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.2---sep-28--2022" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.2---sep-28--2022">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Issues fixed:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-68925" rel="noopener noreferrer">
<span>
SERVER-68925
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Reintroduce check table logging settings at
startup (revert
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-43664" rel="noopener noreferrer">
<span>
SERVER-43664
<!-- -->
)
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-68628" rel="noopener noreferrer">
<span>
SERVER-68628
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Retrying a failed resharding operation after a
primary failover can lead to server crash or lost writes
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-63852" rel="noopener noreferrer">
<span>
SERVER-63852
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
getThreadName() should not crash
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-65317" rel="noopener noreferrer">
<span>
SERVER-65317
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
mongod removes connection from connection pool
after running simple $search query
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-63843" rel="noopener noreferrer">
<span>
SERVER-63843
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Don't allow recursive doLog in synchronous
signal handlers
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/WT-9870" rel="noopener noreferrer">
<span>
WT-9870
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Fix updating pinned timestamp whenever oldest timestamp is
updated during recovery
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%276.0.2%27" rel="noopener noreferrer">
<span>
All JIRA issues closed in 6.0.2
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.2-changelog">
6.0.2 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.1-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.1 - Aug 19, 2022
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.1---aug-19--2022" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.1---aug-19--2022">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Issues fixed:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-68511" rel="noopener noreferrer">
<span>
SERVER-68511
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
MovePrimary update of
<code class="leafygreen-ui-1l06pbn">
config.databases
</code>
entry
must use dotted fields notation
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-68062" rel="noopener noreferrer">
<span>
SERVER-68062
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Multi-stage aggregations that use $geoNear may
violate constraints
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-66072" rel="noopener noreferrer">
<span>
SERVER-66072
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
$match sampling and $group aggregation strange
behavior
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-68130" rel="noopener noreferrer">
<span>
SERVER-68130
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
AutoSplitVector could generate response bigger
than BSONObjMaxUserSize
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-68209" rel="noopener noreferrer">
<span>
SERVER-68209
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
Remove uassert that prevents
<code class="leafygreen-ui-1l06pbn">
config.image_collection
</code>
entry from being invalidated
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/issues/?jql=project%20in%20(SERVER%2CTOOLS%2CWT)%20AND%20resolution%3D%27Fixed%27%20and%20fixversion%3D%276.0.1%27" rel="noopener noreferrer">
<span>
All JIRA issues closed in 6.0.1
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-changelog/#std-label-6.0.1-changelog">
6.0.1 Changelog
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0.0-release-notes">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
6.0.0 - Jul 19, 2022
<a class="headerlink leafygreen-ui-1kepx47" href="#6.0.0---jul-19--2022" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="6.0.0---jul-19--2022">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The rest of this page describes changes and new features introduced in
MongoDB 6.0.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Aggregation
<a class="headerlink leafygreen-ui-1kepx47" href="#aggregation" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="aggregation">
</div>
</a>
</h2>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0-rel-notes-new-agg-stages">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
New Aggregation Stages
<a class="headerlink leafygreen-ui-1kepx47" href="#new-aggregation-stages" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="new-aggregation-stages">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
MongoDB 6.0 introduces the following aggregation stages:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Stage
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/densify/#mongodb-pipeline-pipe.-densify">
<code class="leafygreen-ui-1l06pbn">
$densify
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Creates new documents in a sequence of documents where values in
a specified field are missing.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/documents/#mongodb-pipeline-pipe.-documents">
<code class="leafygreen-ui-1l06pbn">
$documents
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns literal documents from input expressions.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/fill/#mongodb-pipeline-pipe.-fill">
<code class="leafygreen-ui-1l06pbn">
$fill
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Populates
<code class="leafygreen-ui-1l06pbn">
null
</code>
and missing field values within documents.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/shardedDataDistribution/#mongodb-pipeline-pipe.-shardedDataDistribution">
<code class="leafygreen-ui-1l06pbn">
$shardedDataDistribution
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0.3
</em>
:
<!-- -->
Provides size and data distribution information on sharded
collections.
</p>
</div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0-rel-notes-new-agg-operators">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
New Aggregation Operators
<a class="headerlink leafygreen-ui-1kepx47" href="#new-aggregation-operators" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="new-aggregation-operators">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
MongoDB 6.0 introduces the following aggregation operators:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Operator
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/bottom/#mongodb-group-grp.-bottom">
<code class="leafygreen-ui-1l06pbn">
$bottom
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the bottom element within a group according to the specified
sort order.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/bottomN/#mongodb-group-grp.-bottomN">
<code class="leafygreen-ui-1l06pbn">
$bottomN
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an aggregation of the bottom
<code class="leafygreen-ui-1l06pbn">
n
</code>
elements within a group,
according to the specified sort order.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/firstN/#mongodb-group-grp.-firstN">
<code class="leafygreen-ui-1l06pbn">
$firstN
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an aggregation of the first
<code class="leafygreen-ui-1l06pbn">
n
</code>
elements within a group.
Distinct from the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/firstN/#mongodb-expression-exp.-firstN">
<code class="leafygreen-ui-1l06pbn">
$firstN
</code>
</a>
array operator.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/firstN/#mongodb-expression-exp.-firstN">
<code class="leafygreen-ui-1l06pbn">
$firstN (array operator)
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns a specified number of elements from the beginning of an
array.
Distinct from the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/firstN/#mongodb-group-grp.-firstN">
<code class="leafygreen-ui-1l06pbn">
$firstN
</code>
</a>
accumulator.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lastN/#mongodb-group-grp.-lastN">
<code class="leafygreen-ui-1l06pbn">
$lastN
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an aggregation of the last
<code class="leafygreen-ui-1l06pbn">
n
</code>
elements within a group.
Distinct from the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lastN/#mongodb-expression-exp.-lastN">
<code class="leafygreen-ui-1l06pbn">
$lastN
</code>
</a>
array operator.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lastN/#mongodb-expression-exp.-lastN">
<code class="leafygreen-ui-1l06pbn">
$lastN (array operator)
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns a specified number of elements from the end of an
array.
Distinct from the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lastN/#mongodb-group-grp.-lastN">
<code class="leafygreen-ui-1l06pbn">
$lastN
</code>
</a>
accumulator.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/linearFill/#mongodb-group-grp.-linearFill">
<code class="leafygreen-ui-1l06pbn">
$linearFill
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Fills
<code class="leafygreen-ui-1l06pbn">
null
</code>
and missing fields in a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-window">
window
</a>
using
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://en.wikipedia.org/wiki/Linear_interpolation" rel="noopener noreferrer">
<span>
linear interpolation
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
based on surrounding field values.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/locf/#mongodb-group-grp.-locf">
<code class="leafygreen-ui-1l06pbn">
$locf
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Last observation carried forward. Sets values for
<code class="leafygreen-ui-1l06pbn">
null
</code>
and missing
fields in a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-window">
window
</a>
to the last non-null
value for the field.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/maxN/#mongodb-group-grp.-maxN">
<code class="leafygreen-ui-1l06pbn">
$maxN
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an aggregation of the
<code class="leafygreen-ui-1l06pbn">
n
</code>
maximum valued elements
within a group.
Distinct from the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/maxN-array-element/#mongodb-expression-exp.-maxN">
<code class="leafygreen-ui-1l06pbn">
$maxN
</code>
</a>
array operator.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/maxN-array-element/#mongodb-expression-exp.-maxN">
<code class="leafygreen-ui-1l06pbn">
$maxN (array operator)
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the
<code class="leafygreen-ui-1l06pbn">
n
</code>
largest values in an array.
Distinct from the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/maxN/#mongodb-group-grp.-maxN">
<code class="leafygreen-ui-1l06pbn">
$maxN
</code>
</a>
accumulator.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/minN/#mongodb-group-grp.-minN">
<code class="leafygreen-ui-1l06pbn">
$minN
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an aggregation of the
<code class="leafygreen-ui-1l06pbn">
n
</code>
minimum valued elements
within a group.
Distinct from the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/minN-array-element/#mongodb-expression-exp.-minN">
<code class="leafygreen-ui-1l06pbn">
$minN
</code>
</a>
array operator.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/minN-array-element/#mongodb-expression-exp.-minN">
<code class="leafygreen-ui-1l06pbn">
$minN (array operator)
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the
<code class="leafygreen-ui-1l06pbn">
n
</code>
smallest values in an array.
Distinct from the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/minN/#mongodb-group-grp.-minN">
<code class="leafygreen-ui-1l06pbn">
$minN
</code>
</a>
accumulator.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/sortArray/#mongodb-expression-exp.-sortArray">
<code class="leafygreen-ui-1l06pbn">
$sortArray
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Sorts an array based on its elements.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/top/#mongodb-group-grp.-top">
<code class="leafygreen-ui-1l06pbn">
$top
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the top element within a group according to the specified
sort order.
Distinct from the command
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/top/#mongodb-dbcommand-dbcmd.top">
<code class="leafygreen-ui-1l06pbn">
top
</code>
.
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/topN/#mongodb-group-grp.-topN">
<code class="leafygreen-ui-1l06pbn">
$topN
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an aggregation of the top
<code class="leafygreen-ui-1l06pbn">
n
</code>
elements within a group,
according to the specified sort order.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/tsIncrement/#mongodb-expression-exp.-tsIncrement">
<code class="leafygreen-ui-1l06pbn">
$tsIncrement
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Returns the incrementing ordinal from a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-document-bson-type-timestamp">
timestamp
</a>
as a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json-v1/#mongodb-bsontype-data_numberlong">
<code class="leafygreen-ui-1l06pbn">
long
</code>
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/tsSecond/#mongodb-expression-exp.-tsSecond">
<code class="leafygreen-ui-1l06pbn">
$tsSecond
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Returns the seconds from a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-document-bson-type-timestamp">
timestamp
</a>
as a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json-v1/#mongodb-bsontype-data_numberlong">
<code class="leafygreen-ui-1l06pbn">
long
</code>
.
</a>
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
and
<code class="leafygreen-ui-1l06pbn">
$graphLookup
</code>
with Sharded Collections
<a class="headerlink leafygreen-ui-1kepx47" href="#-lookup-and--graphlookup-with-sharded-collections" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-lookup-and--graphlookup-with-sharded-collections">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.1,
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lookup/#mongodb-pipeline-pipe.-lookup">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/graphLookup/#mongodb-pipeline-pipe.-graphLookup">
<code class="leafygreen-ui-1l06pbn">
$graphLookup
</code>
</a>
aggregation stages
support
<a class="leafygreen-ui-tqgtui" href="/docs/manual/sharding/#std-label-sharded-cluster">
sharded collections
</a>
in the
<code class="leafygreen-ui-1l06pbn">
from
</code>
parameter.
</p>
<p class="leafygreen-ui-1kp3ins">
In previous versions of MongoDB,
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
and
<code class="leafygreen-ui-1l06pbn">
$graphLookup
</code>
only allowed for unsharded
<code class="leafygreen-ui-1l06pbn">
from
</code>
collections.
</p>
<p class="leafygreen-ui-1kp3ins">
You
<strong>
cannot
</strong>
use the
<code class="leafygreen-ui-1l06pbn">
$graphLookup
</code>
stage within a transaction while
targeting a sharded collection.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0-rel-notes-change-streams">
</span>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Change Streams
<a class="headerlink leafygreen-ui-1kepx47" href="#change-streams" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="change-streams">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Optimized Change Streams
<a class="headerlink leafygreen-ui-1kepx47" href="#optimized-change-streams" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="optimized-change-streams">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.1,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/changeStreams/#std-label-changeStreams">
change streams
</a>
are optimized, providing more
efficient resource utilization and faster execution of some aggregation
pipeline stages.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
wallTime
</code>
Change Stream Output Field
<a class="headerlink leafygreen-ui-1kepx47" href="#walltime-change-stream-output-field" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="walltime-change-stream-output-field">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/change-events/#std-label-change-stream-output">
change stream output
</a>
has a new
<code class="leafygreen-ui-1l06pbn">
wallTime
</code>
field that contains the
server date and time of the database operation.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Change Streams with Document Pre- and Post-Images
<a class="headerlink leafygreen-ui-1kepx47" href="#change-streams-with-document-pre--and-post-images" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="change-streams-with-document-pre--and-post-images">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, you can use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/change-events/#std-label-change-stream-output">
change streams
</a>
to output the version of a document before and
after changes (the document pre- and post-images). For examples, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.watch/#std-label-db.collection.watch-change-streams-pre-and-post-images-example">
Change Streams with Document Pre- and Post-Images
<!-- -->
.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Change Stream Expanded Events
<a class="headerlink leafygreen-ui-1kepx47" href="#change-stream-expanded-events" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="change-stream-expanded-events">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, change streams can show additional
change events for DDL operations, like creating indexes and dropping
collections.
</p>
<p class="leafygreen-ui-1kp3ins">
For more information, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/change-events/#std-label-change-streams-expanded-events">
Expanded Events
<!-- -->
.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Filters
<a class="headerlink leafygreen-ui-1kepx47" href="#filters" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="filters">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, whenever possible,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/changeStreams/#std-label-change-stream-modify-output">
match filters
</a>
are applied to change streams earlier
than in prior releases. This improves performance. However, when a
filter is narrowly defined, an earlier match may cause an operation that
succeeds in prior versions to fail in 6.0.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Cluster Administration
<a class="headerlink leafygreen-ui-1kepx47" href="#cluster-administration" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="cluster-administration">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Cluster Server Parameters
<a class="headerlink leafygreen-ui-1kepx47" href="#cluster-server-parameters" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="cluster-server-parameters">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, you can use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/cluster-parameters/#std-label-cluster-parameters">
Cluster Parameters for a Self-Managed Deployment
</a>
to modify
and retrieve configuration options for all nodes in a replica set or sharded
cluster. You can use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/setClusterParameter/#mongodb-dbcommand-dbcmd.setClusterParameter">
<code class="leafygreen-ui-1l06pbn">
setClusterParameter
</code>
</a>
to modify cluster-wide
options and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/getClusterParameter/#mongodb-dbcommand-dbcmd.getClusterParameter">
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
</a>
to retrieve the value of a cluster
parameter.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Connection Pool Parameters
<a class="headerlink leafygreen-ui-1kepx47" href="#connection-pool-parameters" title="Permalink to this heading">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="connection-pool-parameters">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, you can use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.ShardingTaskExecutorPoolMinSizeForConfigServers">
<code class="leafygreen-ui-1l06pbn">
ShardingTaskExecutorPoolMinSizeForConfigServers
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.ShardingTaskExecutorPoolMaxSizeForConfigServers">
<code class="leafygreen-ui-1l06pbn">
ShardingTaskExecutorPoolMaxSizeForConfigServers
</code>
</a>
to set the
minimum and maximum sharding TaskExecutor connection pool size for
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharded-cluster-config-servers/#std-label-sharding-config-server">
configuration servers
<!-- -->
.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
changeStreamOptions
</code>
Cluster Parameter
<a class="headerlink leafygreen-ui-1kepx47" href="#changestreamoptions-cluster-parameter" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="changestreamoptions-cluster-parameter">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, you can use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/cluster-parameters/changeStreamOptions/#mongodb-parameter-param.changeStreamOptions">
<code class="leafygreen-ui-1l06pbn">
changeStreamOptions
</code>
</a>
to control
the retention policy of change stream pre- and post-images.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
internalSessionsReapThreshold
</code>
Parameter
<a class="headerlink leafygreen-ui-1kepx47" href="#internalsessionsreapthreshold-parameter" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="internalsessionsreapthreshold-parameter">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, you can use the new
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.internalSessionsReapThreshold">
<code class="leafygreen-ui-1l06pbn">
internalSessionsReapThreshold
</code>
</a>
parameter to set the session
limit for internal session metadata deletion.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Multiple Arbiters Unsupported
<a class="headerlink leafygreen-ui-1kepx47" href="#multiple-arbiters-unsupported" title="Permalink to this heading">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="multiple-arbiters-unsupported">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.3, support for multiple arbiters in a replica set is
disabled by default. To enable support for multiple arbiters, start each
node with the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.allowMultipleArbiters">
<code class="leafygreen-ui-1l06pbn">
allowMultipleArbiters
</code>
</a>
parameter.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Clustered Collections
<a class="headerlink leafygreen-ui-1kepx47" href="#clustered-collections" title="Permalink to this heading">
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<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="clustered-collections">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.3, you can create clustered collections.
</p>
<p class="leafygreen-ui-1kp3ins">
Clustered collections store indexed documents in the same
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/wiredtiger/#std-label-storage-wiredtiger">
WiredTiger
</a>
file as the index specification.
Storing the collection's documents and index in the same file provides
benefits for storage and performance compared to regular indexes.
</p>
<p class="leafygreen-ui-1kp3ins">
Clustered collections are created with a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.createCollection/#std-label-db.createCollection.clusteredIndex">
clustered index
</a>
. The clustered index specifies the
order in which documents are stored.
</p>
<p class="leafygreen-ui-1kp3ins">
To create a clustered collection, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/clustered-collections/#std-label-clustered-collections-examples">
Examples
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
To learn about the benefits compared to a normal collection, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/clustered-collections/#std-label-clustered-collections">
Clustered Collections
<!-- -->
.
</a>
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Indexes
<a class="headerlink leafygreen-ui-1kepx47" href="#indexes" title="Permalink to this heading">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="indexes">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.1, you can use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collMod/#mongodb-dbcommand-dbcmd.collMod">
<code class="leafygreen-ui-1l06pbn">
collMod
</code>
</a>
database
command to add the
<code class="leafygreen-ui-1l06pbn">
expireAfterSeconds
</code>
option to an existing
single-field non-TTL index.
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, you can use the
<code class="leafygreen-ui-1l06pbn">
prepareUnique
</code>
and
<code class="leafygreen-ui-1l06pbn">
unique
</code>
options for the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collMod/#mongodb-dbcommand-dbcmd.collMod">
<code class="leafygreen-ui-1l06pbn">
collMod
</code>
</a>
command to convert an
existing standard index to a unique index.
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Partial Indexes
<a class="headerlink leafygreen-ui-1kepx47" href="#partial-indexes" title="Permalink to this heading">
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<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="partial-indexes">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, you can use the operators
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/in/#mongodb-query-op.-in">
<code class="leafygreen-ui-1l06pbn">
$in
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/or/#mongodb-query-op.-or">
<code class="leafygreen-ui-1l06pbn">
$or
</code>
</a>
to create
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-partial/#std-label-index-type-partial">
partial indexes
</a>
. The
<code class="leafygreen-ui-1l06pbn">
partialFilterExpression
</code>
maximum depth is also expanded from 2 to 4. You can now use the operators
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/and/#mongodb-query-op.-and">
<code class="leafygreen-ui-1l06pbn">
$and
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/or/#mongodb-query-op.-or">
<code class="leafygreen-ui-1l06pbn">
$or
</code>
</a>
at non-top-levels.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Installation
<a class="headerlink leafygreen-ui-1kepx47" href="#installation" title="Permalink to this heading">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="installation">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
SELinux Policies
<a class="headerlink leafygreen-ui-1kepx47" href="#selinux-policies" title="Permalink to this heading">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="selinux-policies">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.1, there is a new SE Linux Policy for:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
MongoDB Enterprise Server
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
MongoDB Community Edition Server
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
running on Red Hat Linux. The SELinux policy is for use with default
installations using
<code class="leafygreen-ui-1l06pbn">
rpm
</code>
installer packages.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Replica Sets
<a class="headerlink leafygreen-ui-1kepx47" href="#replica-sets" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="replica-sets">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Multiple Arbiters Unsupported
<a class="headerlink leafygreen-ui-1kepx47" href="#multiple-arbiters-unsupported-1" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="multiple-arbiters-unsupported-1">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.3, support for multiple arbiters in a replica set is
disabled by default. To enable support for multiple arbiters, start each
node with the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.allowMultipleArbiters">
<code class="leafygreen-ui-1l06pbn">
allowMultipleArbiters
</code>
</a>
parameter.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
initialSyncMethod
</code>
Parameter
<a class="headerlink leafygreen-ui-1kepx47" href="#initialsyncmethod-parameter" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="initialsyncmethod-parameter">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.2, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.initialSyncMethod">
<code class="leafygreen-ui-1l06pbn">
initialSyncMethod
</code>
</a>
determines
whether
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/replica-set-sync/#std-label-replica-set-initial-sync">
initial sync
</a>
is a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/replica-set-sync/#std-label-replica-set-initial-sync-logical">
logical initial sync
</a>
or a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/replica-set-sync/#std-label-replica-set-initial-sync-file-copy-based">
file copy based initial sync
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.initialSyncMethod">
<code class="leafygreen-ui-1l06pbn">
initialSyncMethod
</code>
</a>
is only available in MongoDB Enterprise
Server.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Specify Secondary Oplog Batch Delay
<a class="headerlink leafygreen-ui-1kepx47" href="#specify-secondary-oplog-batch-delay" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="specify-secondary-oplog-batch-delay">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, you can use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.oplogBatchDelayMillis">
<code class="leafygreen-ui-1l06pbn">
oplogBatchDelayMillis
</code>
</a>
server parameter to specify a delay
for writes of oplog batches on secondaries. Adding a short oplog batch
delay can reduce
<span class="leafygreen-ui-vm4wms" tabindex="0">
IOPS
</span>
on
secondaries, but adds latency for writes with write concern
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#mongodb-writeconcern-writeconcern.-majority-">
<code class="leafygreen-ui-1l06pbn">
"majority"
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
For more information, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.oplogBatchDelayMillis">
<code class="leafygreen-ui-1l06pbn">
oplogBatchDelayMillis
</code>
.
</a>
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Security
<a class="headerlink leafygreen-ui-1kepx47" href="#security" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="security">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Audit Log Encryption
<a class="headerlink leafygreen-ui-1kepx47" href="#audit-log-encryption" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="audit-log-encryption">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0 Enterprise, you can encrypt the MongoDB audit
log.
</p>
<p class="leafygreen-ui-1kp3ins">
To configure the audit log, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/security-encryption-at-rest/#std-label-security-encryption-at-rest-audit-log">
Audit Log
<!-- -->
.
</a>
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Sharding
<a class="headerlink leafygreen-ui-1kepx47" href="#sharding" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sharding">
</div>
</a>
</h2>
<span class="leafygreen-ui-1qnjd6d" id="std-label-release-notes-6.0-balancing-policy-changes">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Balancing Policy Changes
<a class="headerlink leafygreen-ui-1kepx47" href="#balancing-policy-changes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="balancing-policy-changes">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0.3, data in sharded clusters is distributed based on data
size rather than number of chunks. Be aware of the following significant changes
in sharded cluster data distribution behavior:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The balancer distributes ranges of data rather than chunks. The balancing
policy looks for evenness of data distribution rather than chunk distribution.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Chunks are not subject to auto-splitting. Instead, chunks are split only when
moved across shards.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A chunk is now referred to as a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-range">
range
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
moveRange
</code>
has replaced
<code class="leafygreen-ui-1l06pbn">
moveChunk
</code>
.
</p>
</li>
</ul>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Default Chunk Size Increased from 64 MB to 128 MB
<a class="headerlink leafygreen-ui-1kepx47" href="#default-chunk-size-increased-from-64-mb-to-128-mb" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="default-chunk-size-increased-from-64-mb-to-128-mb">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.2, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-data-partitioning/#std-label-sharding-chunk-size">
default chunk size
</a>
is 128 megabytes. In
earlier versions of MongoDB, the default chunk size is 64 megabytes.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
enableSharding
</code>
No Longer Required
<a class="headerlink leafygreen-ui-1kepx47" href="#enablesharding-no-longer-required" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="enablesharding-no-longer-required">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/enableSharding/#mongodb-dbcommand-dbcmd.enableSharding">
<code class="leafygreen-ui-1l06pbn">
enableSharding
</code>
</a>
command is
no longer required to shard a collection.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Monitor Defragmentation Status
<a class="headerlink leafygreen-ui-1kepx47" href="#monitor-defragmentation-status" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="monitor-defragmentation-status">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.3, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/balancerCollectionStatus/#mongodb-dbcommand-dbcmd.balancerCollectionStatus">
<code class="leafygreen-ui-1l06pbn">
balancerCollectionStatus
</code>
</a>
command returns detailed information when run on a namespace going
through chunk defragmentation. The output includes the current phase of
the defragmentation and how many chunks are left to process.
</p>
<p class="leafygreen-ui-1kp3ins">
To see example output, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/balancerCollectionStatus/#std-label-balancer-collection-status-defrag-output-command">
Ongoing Defragmentation Process
<!-- -->
.
</a>
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0-rel-notes-sbe">
</span>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Slot-Based Query Execution Engine
<a class="headerlink leafygreen-ui-1kepx47" href="#slot-based-query-execution-engine" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="slot-based-query-execution-engine">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.1, MongoDB uses a new query execution engine for
eligible queries, called the slot-based query execution engine. If the
slot-based query execution engine is used, new fields are included in
the query explain plan output.
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The new query execution engine is used if possible.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If the new query execution engine is used, new fields are included in
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#std-label-explain-results-5.1-later">
query explain plan output
<!-- -->
.
</a>
</p>
</li>
</ul>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Slot-Based Query Execution Engine
<!-- -->
Can Execute
<code class="leafygreen-ui-1l06pbn">
$group
</code>
and
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
Stages
<a class="headerlink leafygreen-ui-1kepx47" href="#sbe-title-can-execute--group-and--lookup-stages" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sbe-title-can-execute--group-and--lookup-stages">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in version 6.0, MongoDB uses the
<!-- -->
slot-based query execution engine
<!-- -->
to execute eligible
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lookup/#mongodb-pipeline-pipe.-lookup">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
</a>
stages when certain
conditions are met.
</p>
<p class="leafygreen-ui-1kp3ins">
For more information, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/aggregation-pipeline-optimization/#std-label-sbe-pipeline-optimizations">
Slot-Based Query Execution Engine
<!-- -->
Pipeline Optimizations
<!-- -->
.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Set
<!-- -->
Slot-Based Query Execution Engine
<!-- -->
Plan Cache Size
<a class="headerlink leafygreen-ui-1kepx47" href="#set-sbe-title-plan-cache-size" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="set-sbe-title-plan-cache-size">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
You can set the size of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-plans/#std-label-read-operations-query-optimization">
plan cache
</a>
for the new query engine with the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.planCacheSize">
<code class="leafygreen-ui-1l06pbn">
planCacheSize
</code>
</a>
parameter.
</p>
<p class="leafygreen-ui-1kp3ins">
Increasing the plan cache size adds more cached
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-plan-cache-query-shape">
plan cache query shapes
</a>
for the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-plans/#std-label-read-operations-query-optimization">
query planner
</a>
. This can
improve query performance, but increases memory usage.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Stable API
<a class="headerlink leafygreen-ui-1kepx47" href="#stable-api" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="stable-api">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following sections describe additions to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/stable-api/#std-label-stable-api">
Stable API
</a>
introduced in MongoDB 6.0.
</p>
<p class="leafygreen-ui-1kp3ins">
To see the full list of database commands available in the Stable API,
see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/stable-api-changelog/#std-label-stable-api-changelog">
Stable API Changelog
<!-- -->
.
</a>
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Database Commands
<a class="headerlink leafygreen-ui-1kepx47" href="#database-commands" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="database-commands">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, the following database commands are supported
in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/stable-api/#std-label-stable-api">
Stable API
<!-- -->
:
</a>
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:20%"/>
<col style="width:10%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Command
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Stable API Version
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/count/#mongodb-dbcommand-dbcmd.count">
<code class="leafygreen-ui-1l06pbn">
count
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Counts the number of documents in a collection or a view. (Also
available in the Stable API for 5.0-series deployments starting
in MongoDB 5.0.9.)
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Aggregation Stages and Operators
<a class="headerlink leafygreen-ui-1kepx47" href="#aggregation-stages-and-operators" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="aggregation-stages-and-operators">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, the following aggregation stages and operators
are supported in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/stable-api/#std-label-stable-api">
Stable API
<!-- -->
:
</a>
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:20%"/>
<col style="width:10%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Stage or Operator
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Stable API Version
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/bottom/#mongodb-group-grp.-bottom">
<code class="leafygreen-ui-1l06pbn">
$bottom
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the bottom element within a group, according to the specified
sort order.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/bottomN/#mongodb-group-grp.-bottomN">
<code class="leafygreen-ui-1l06pbn">
$bottomN
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an aggregation of the bottom
<code class="leafygreen-ui-1l06pbn">
n
</code>
elements within a group,
according to the specified sort order.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/dateAdd/#mongodb-expression-exp.-dateAdd">
<code class="leafygreen-ui-1l06pbn">
$dateAdd
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Increments a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Date/#mongodb-method-Date">
<code class="leafygreen-ui-1l06pbn">
Date()
</code>
</a>
object by a
specified number of time units.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/dateDiff/#mongodb-expression-exp.-dateDiff">
<code class="leafygreen-ui-1l06pbn">
$dateDiff
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the difference between two dates.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/dateSubtract/#mongodb-expression-exp.-dateSubtract">
<code class="leafygreen-ui-1l06pbn">
$dateSubtract
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Decrements a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Date/#mongodb-method-Date">
<code class="leafygreen-ui-1l06pbn">
Date()
</code>
</a>
object by a
specified number of time units.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/dateTrunc/#mongodb-expression-exp.-dateTrunc">
<code class="leafygreen-ui-1l06pbn">
$dateTrunc
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Truncates a date.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/densify/#mongodb-pipeline-pipe.-densify">
<code class="leafygreen-ui-1l06pbn">
$densify
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Creates new documents in a sequence of documents where certain values
in a field are missing.
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/firstN/#mongodb-group-grp.-firstN">
<code class="leafygreen-ui-1l06pbn">
$firstN
</code>
</a>
(aggregation accumulator)
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an aggregation of the first
<code class="leafygreen-ui-1l06pbn">
n
</code>
elements within a group.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/firstN/#mongodb-expression-exp.-firstN">
<code class="leafygreen-ui-1l06pbn">
$firstN
</code>
</a>
(array operator)
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns a specified number of elements from the beginning of an
array.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/getField/#mongodb-expression-exp.-getField">
<code class="leafygreen-ui-1l06pbn">
$getField
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the value of a specified field from a document.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lastN/#mongodb-group-grp.-lastN">
<code class="leafygreen-ui-1l06pbn">
$lastN
</code>
</a>
(aggregation accumulator)
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an aggregation of the last
<code class="leafygreen-ui-1l06pbn">
n
</code>
elements within a group.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lastN/#mongodb-expression-exp.-lastN">
<code class="leafygreen-ui-1l06pbn">
$lastN
</code>
</a>
(array operator)
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns a specified number of elements from the end of an
array.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/locf/#mongodb-group-grp.-locf">
<code class="leafygreen-ui-1l06pbn">
$locf
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Last observation carried forward. Sets values for
<code class="leafygreen-ui-1l06pbn">
null
</code>
and missing
fields in a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-window">
window
</a>
to the last non-null
value for the field.
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/maxN/#mongodb-group-grp.-maxN">
<code class="leafygreen-ui-1l06pbn">
$maxN
</code>
</a>
(aggregation accumulator)
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an aggregation of the maximum value
<code class="leafygreen-ui-1l06pbn">
n
</code>
elements within
a group.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/maxN-array-element/#mongodb-expression-exp.-maxN">
<code class="leafygreen-ui-1l06pbn">
$maxN
</code>
</a>
(array operator)
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the
<code class="leafygreen-ui-1l06pbn">
n
</code>
largest values in an array.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/minN/#mongodb-group-grp.-minN">
<code class="leafygreen-ui-1l06pbn">
$minN
</code>
</a>
(aggregation accumulator)
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an aggregation of the minimum value
<code class="leafygreen-ui-1l06pbn">
n
</code>
elements within
a group.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/minN-array-element/#mongodb-expression-exp.-minN">
<code class="leafygreen-ui-1l06pbn">
$minN
</code>
</a>
(array operator)
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the
<code class="leafygreen-ui-1l06pbn">
n
</code>
smallest values in an array.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setField/#mongodb-expression-exp.-setField">
<code class="leafygreen-ui-1l06pbn">
$setField
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Adds, updates, or removes a specified field in a document.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#mongodb-pipeline-pipe.-setWindowFields">
<code class="leafygreen-ui-1l06pbn">
$setWindowFields
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Performs operations on a specified span of documents in a
collection, known as a
<em>
window
</em>
, and returns the results based on
the chosen
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-window-operators">
window operator
<!-- -->
.
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/sortArray/#mongodb-expression-exp.-sortArray">
<code class="leafygreen-ui-1l06pbn">
$sortArray
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Sorts an array based on its elements.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/top/#mongodb-group-grp.-top">
<code class="leafygreen-ui-1l06pbn">
$top
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the top element within a group according to the specified
sort order.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/topN/#mongodb-group-grp.-topN">
<code class="leafygreen-ui-1l06pbn">
$topN
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an aggregation of the top
<code class="leafygreen-ui-1l06pbn">
n
</code>
elements within a group,
according to the specified sort order.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/tsIncrement/#mongodb-expression-exp.-tsIncrement">
<code class="leafygreen-ui-1l06pbn">
$tsIncrement
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Returns the incrementing ordinal from a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-document-bson-type-timestamp">
timestamp
</a>
as a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json-v1/#mongodb-bsontype-data_numberlong">
<code class="leafygreen-ui-1l06pbn">
long
</code>
.
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/tsSecond/#mongodb-expression-exp.-tsSecond">
<code class="leafygreen-ui-1l06pbn">
$tsSecond
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Returns the seconds from a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-document-bson-type-timestamp">
timestamp
</a>
as a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json-v1/#mongodb-bsontype-data_numberlong">
<code class="leafygreen-ui-1l06pbn">
long
</code>
.
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Window Operators
<a class="headerlink leafygreen-ui-1kepx47" href="#window-operators" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="window-operators">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, the following window operators are supported in
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/stable-api/#std-label-stable-api">
Stable API
<!-- -->
:
</a>
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:20%"/>
<col style="width:10%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Window Operator
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Stable API Version
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/addToSet/#mongodb-group-grp.-addToSet">
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an array of all unique values that results from
applying an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
to
each document.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/avg/#mongodb-group-grp.-avg">
<code class="leafygreen-ui-1l06pbn">
$avg
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the average for the specified
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
. Ignores non-numeric values.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/count-accumulator/#mongodb-group-grp.-count">
<code class="leafygreen-ui-1l06pbn">
$count
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the number of documents in the group or window.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/covariancePop/#mongodb-group-grp.-covariancePop">
<code class="leafygreen-ui-1l06pbn">
$covariancePop
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the population covariance of two numeric
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expressions
<!-- -->
.
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/covarianceSamp/#mongodb-group-grp.-covarianceSamp">
<code class="leafygreen-ui-1l06pbn">
$covarianceSamp
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the sample covariance of two numeric
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expressions
<!-- -->
.
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/denseRank/#mongodb-group-grp.-denseRank">
<code class="leafygreen-ui-1l06pbn">
$denseRank
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the document position (known as the rank) relative to
other documents in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#mongodb-pipeline-pipe.-setWindowFields">
<code class="leafygreen-ui-1l06pbn">
$setWindowFields
</code>
</a>
stage
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-partitionBy">
partition
</a>
. There are no
gaps in the ranks. Ties receive the same rank.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/derivative/#mongodb-group-grp.-derivative">
<code class="leafygreen-ui-1l06pbn">
$derivative
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the average rate of change within the specified
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-window">
window
<!-- -->
.
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/documentNumber/#mongodb-group-grp.-documentNumber">
<code class="leafygreen-ui-1l06pbn">
$documentNumber
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the position of a document (known as the document
number) in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#mongodb-pipeline-pipe.-setWindowFields">
<code class="leafygreen-ui-1l06pbn">
$setWindowFields
</code>
</a>
stage
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-partitionBy">
partition
</a>
. Ties result in
different adjacent document numbers.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/expMovingAvg/#mongodb-group-grp.-expMovingAvg">
<code class="leafygreen-ui-1l06pbn">
$expMovingAvg
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the exponential moving average for the numeric
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
<!-- -->
.
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/first/#mongodb-group-grp.-first">
<code class="leafygreen-ui-1l06pbn">
$first
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the value that results from applying an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
to the first
document in a group or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-window">
window
<!-- -->
.
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/integral/#mongodb-group-grp.-integral">
<code class="leafygreen-ui-1l06pbn">
$integral
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the approximation of the area under a curve.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/last/#mongodb-group-grp.-last">
<code class="leafygreen-ui-1l06pbn">
$last
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the value that results from applying an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
to the last
document in a group or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-window">
window
<!-- -->
.
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/locf/#mongodb-group-grp.-locf">
<code class="leafygreen-ui-1l06pbn">
$locf
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Last observation carried forward. Sets values for
<code class="leafygreen-ui-1l06pbn">
null
</code>
and missing
fields in a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-window">
window
</a>
to the last non-null
value for the field.
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/max/#mongodb-group-grp.-max">
<code class="leafygreen-ui-1l06pbn">
$max
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the maximum value that results from applying an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
to each document.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/min/#mongodb-group-grp.-min">
<code class="leafygreen-ui-1l06pbn">
$min
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the minimum value that results from applying an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
to each document.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/push/#mongodb-group-grp.-push">
<code class="leafygreen-ui-1l06pbn">
$push
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an array of values that result from applying an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
to each document.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/rank/#mongodb-group-grp.-rank">
<code class="leafygreen-ui-1l06pbn">
$rank
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the document position (known as the rank) relative to
other documents in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#mongodb-pipeline-pipe.-setWindowFields">
<code class="leafygreen-ui-1l06pbn">
$setWindowFields
</code>
</a>
stage
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-partitionBy">
partition
<!-- -->
.
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/shift/#mongodb-group-grp.-shift">
<code class="leafygreen-ui-1l06pbn">
$shift
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the value from an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
applied to a document in a
specified position relative to the current document in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#mongodb-pipeline-pipe.-setWindowFields">
<code class="leafygreen-ui-1l06pbn">
$setWindowFields
</code>
</a>
stage
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-partitionBy">
partition
<!-- -->
.
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/stdDevPop/#mongodb-group-grp.-stdDevPop">
<code class="leafygreen-ui-1l06pbn">
$stdDevPop
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the population standard deviation that results from
applying a numeric
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
to each document.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/stdDevSamp/#mongodb-group-grp.-stdDevSamp">
<code class="leafygreen-ui-1l06pbn">
$stdDevSamp
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the sample standard deviation that results from
applying a numeric
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
to each document.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-xejatx" role="rowheader">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/sum/#mongodb-group-grp.-sum">
<code class="leafygreen-ui-1l06pbn">
$sum
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the sum that results from applying a numeric
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
to each document.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
V1
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Time Series Collections
<a class="headerlink leafygreen-ui-1kepx47" href="#time-series-collections" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="time-series-collections">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following sections describe improvements and new features for
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/timeseries-collections/#std-label-manual-timeseries-collection">
time series collections
<!-- -->
.
</a>
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Sharded Time Series Collections
<a class="headerlink leafygreen-ui-1kepx47" href="#sharded-time-series-collections" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sharded-time-series-collections">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
MongoDB 5.1 provides support for sharded
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/timeseries-collections/#std-label-manual-timeseries-collection">
time series collections
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
See:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/timeseries/timeseries-shard-collection/#std-label-manual-timeseries-shard-collection">
Shard a Time Series Collection
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/shardCollection/#mongodb-dbcommand-dbcmd.shardCollection">
<code class="leafygreen-ui-1l06pbn">
shardCollection
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/timeseries/timeseries-limitations/#std-label-time-series-limitations-sharding">
Time Series Limitations
</a>
</p>
</li>
</ul>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Sharded Time Series Granularity
<a class="headerlink leafygreen-ui-1kepx47" href="#sharded-time-series-granularity" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sharded-time-series-granularity">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, you can
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/timeseries/timeseries-granularity/#std-label-timeseries-granularity">
modify the granularity
</a>
of sharded time series collections.
</p>
</section>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Updates and Deletes
<a class="headerlink leafygreen-ui-1kepx47" href="#updates-and-deletes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="updates-and-deletes">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.1, time series collections support update and
delete operations with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/timeseries/timeseries-limitations/#std-label-timeseries-limitations-updates">
limitations
<!-- -->
.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Time Series Column Compression
<a class="headerlink leafygreen-ui-1kepx47" href="#time-series-column-compression" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="time-series-column-compression">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.2, time series collections use
<strong>
column
compression
</strong>
. Column compression adds a number of innovations that work
together to significantly improve practical compression, reduce your
data's overall storage on disk, and improve read performance.
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, arrays are also compressed as part of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/timeseries/timeseries-compression/">
time series column compression
<!-- -->
.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Support for
<code class="leafygreen-ui-1l06pbn">
$geoNear
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#support-for--geonear" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="support-for--geonear">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.3, you can use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/geoNear/#mongodb-pipeline-pipe.-geoNear">
<code class="leafygreen-ui-1l06pbn">
$geoNear
</code>
</a>
pipeline
operator on any field in a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/timeseries-collections/#std-label-manual-timeseries-collection">
time series collection
<!-- -->
.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Additional Secondary Index Types
<a class="headerlink leafygreen-ui-1kepx47" href="#additional-secondary-index-types" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="additional-secondary-index-types">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, you can perform the following operations on
time series collections:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Add additional
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-secondary-index">
secondary index
</a>
types
to time series collections, including
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2dsphere/#std-label-2dsphere-index">
2dsphere
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2d/#std-label-2d-index">
2d
</a>
indexes.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Add a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-compound/#std-label-index-type-compound">
compound index
</a>
on the
<code class="leafygreen-ui-1l06pbn">
timeField
</code>
,
<code class="leafygreen-ui-1l06pbn">
metaField
</code>
, or measurement fields.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/or/#mongodb-query-op.-or">
<code class="leafygreen-ui-1l06pbn">
$or
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/in/#mongodb-query-op.-in">
<code class="leafygreen-ui-1l06pbn">
$in
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/geoWithin/#mongodb-query-op.-geoWithin">
<code class="leafygreen-ui-1l06pbn">
$geoWithin
</code>
</a>
operators
with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-partial/#std-label-index-type-partial">
partial indexes
</a>
on a time series
collection.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Add a partial filter expression on the
<code class="leafygreen-ui-1l06pbn">
metaField
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Use the
<code class="leafygreen-ui-1l06pbn">
metaField
</code>
with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2dsphere/#std-label-2dsphere-index">
2dsphere
</a>
indexes.
</p>
</li>
</ul>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Sort Operations Use Secondary Indexes
<a class="headerlink leafygreen-ui-1kepx47" href="#sort-operations-use-secondary-indexes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sort-operations-use-secondary-indexes">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Sort operations on time series collections can use indexes to improve
performance. For more information and an example, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/timeseries/timeseries-secondary-index/#std-label-timeseries-secondary-index-sort-performance">
Use Secondary Indexes to Improve Sort Performance
<!-- -->
.
</a>
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0-rel-notes-general">
</span>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
General Improvements
<a class="headerlink leafygreen-ui-1kepx47" href="#general-improvements" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="general-improvements">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
OpenSSL3 FIPS Support
<a class="headerlink leafygreen-ui-1kepx47" href="#openssl3-fips-support" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="openssl3-fips-support">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0.7, FIPS mode supports
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.openssl.org/docs/man3.0/man7/migration_guide.html" rel="noopener noreferrer">
<span>
OpenSSL3
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
for the following operating systems:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Ubuntu 22.04
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
RHEL 9
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Amazon Linux 2023
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 8.0, FIPS mode supports OpenSSL3 for Amazon Linux
2023.3.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Capped Collections Improvements
<a class="headerlink leafygreen-ui-1kepx47" href="#capped-collections-improvements" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="capped-collections-improvements">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, you can change a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/capped-collections/#std-label-manual-capped-collection">
capped collection's
</a>
maximum size, either in
bytes or in number of documents, using the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collMod/#mongodb-dbcommand-dbcmd.collMod">
<code class="leafygreen-ui-1l06pbn">
collMod
</code>
</a>
command. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collMod/#std-label-resize-capped-collection">
Resize a Capped Collection
</a>
for more details.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
numOrphanDocs
</code>
Field Added to collStats Command
<a class="headerlink leafygreen-ui-1kepx47" href="#numorphandocs-field-added-to-collstats-command" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="numorphandocs-field-added-to-collstats-command">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collStats/#std-label-collStats-output">
collStats output
</a>
includes the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collStats/#mongodb-data-collStats.numOrphanDocs">
<code class="leafygreen-ui-1l06pbn">
collStats.numOrphanDocs
</code>
</a>
field that shows the number of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-orphaned-document">
orphaned documents
</a>
in the collection.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Exclude Embedded Fields in
<code class="leafygreen-ui-1l06pbn">
serverStatus
</code>
Output
<a class="headerlink leafygreen-ui-1kepx47" href="#exclude-embedded-fields-in-serverstatus-output" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="exclude-embedded-fields-in-serverstatus-output">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0 (and 5.0.9), you can exclude embedded fields
from the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/serverStatus/#mongodb-dbcommand-dbcmd.serverStatus">
<code class="leafygreen-ui-1l06pbn">
serverStatus
</code>
</a>
output.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Connections
<a class="headerlink leafygreen-ui-1kepx47" href="#connections" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="connections">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.getMongo/#mongodb-method-db.getMongo">
<code class="leafygreen-ui-1l06pbn">
Mongo()
</code>
</a>
connection object has the following new methods:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Mongo.getWriteConcern/#mongodb-method-Mongo.getWriteConcern">
<code class="leafygreen-ui-1l06pbn">
Mongo.getWriteConcern()
</code>
</a>
returns the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-write-concern">
write concern
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Mongo.setWriteConcern/#mongodb-method-Mongo.setWriteConcern">
<code class="leafygreen-ui-1l06pbn">
Mongo.setWriteConcern()
</code>
</a>
sets the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-write-concern">
write concern
</a>
</p>
</li>
</ul>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Support for Diagnostic Backtrace Generation in
<code class="leafygreen-ui-1l06pbn">
arm64
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#support-for-diagnostic-backtrace-generation-in-arm64" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="support-for-diagnostic-backtrace-generation-in-arm64">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0 (and 5.0.10),
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/manage-mongodb-processes/#std-label-sigusr2-diagnostic-backtrace">
diagnostic backtrace
generation
</a>
in
<code class="leafygreen-ui-1l06pbn">
arm64
</code>
is supported.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Configure Refresh Interval for Cached LDAP User Information
<a class="headerlink leafygreen-ui-1kepx47" href="#configure-refresh-interval-for-cached-ldap-user-information" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="configure-refresh-interval-for-cached-ldap-user-information">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.2, you can use the following new server parameters
to configure the refresh interval for cached LDAP user information:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.ldapUserCacheRefreshInterval">
<code class="leafygreen-ui-1l06pbn">
ldapUserCacheRefreshInterval
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.ldapUserCacheStalenessInterval">
<code class="leafygreen-ui-1l06pbn">
ldapUserCacheStalenessInterval
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.ldapShouldRefreshUserCacheEntries">
<code class="leafygreen-ui-1l06pbn">
ldapShouldRefreshUserCacheEntries
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.2, the update interval for cached user information
retrieved from an LDAP server depends on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.ldapShouldRefreshUserCacheEntries">
<code class="leafygreen-ui-1l06pbn">
ldapShouldRefreshUserCacheEntries
</code>
:
</a>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If true, use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.ldapUserCacheRefreshInterval">
<code class="leafygreen-ui-1l06pbn">
ldapUserCacheRefreshInterval
</code>
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If false, use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.ldapUserCacheInvalidationInterval">
<code class="leafygreen-ui-1l06pbn">
ldapUserCacheInvalidationInterval
</code>
.
</a>
</p>
</li>
</ul>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Support for
<code class="leafygreen-ui-1l06pbn">
$group
</code>
Stage in Explain Results
<a class="headerlink leafygreen-ui-1kepx47" href="#support-for--group-stage-in-explain-results" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="support-for--group-stage-in-explain-results">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.2, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#std-label-explain-results">
Explain Results
</a>
support the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
stage (
<code class="leafygreen-ui-1l06pbn">
GROUP
</code>
), which separates documents into
groups according to a group key, in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/explain-results/#mongodb-data-explain.queryPlanner.winningPlan.stage">
<code class="leafygreen-ui-1l06pbn">
stage
</code>
</a>
field.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Changes Affecting Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#changes-affecting-compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="changes-affecting-compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Some changes can affect compatibility and may require user actions. For
a detailed list of compatibility changes, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-compatibility/#std-label-6.0-compatibility">
Compatibility Changes in MongoDB 6.0
<!-- -->
.
</a>
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0-upgrade">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Upgrade Procedures
<a class="headerlink leafygreen-ui-1kepx47" href="#upgrade-procedures" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="upgrade-procedures">
</div>
</a>
</h2>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
Feature Compatibility Version
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
To upgrade to MongoDB 6.0 from a 5.0 deployment, the 5.0 deployment
must have
<code class="leafygreen-ui-1l06pbn">
featureCompatibilityVersion
</code>
set to
<code class="leafygreen-ui-1l06pbn">
5.0
</code>
. To check
the version:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.adminCommand( { getParameter: 1, featureCompatibilityVersion: 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>( <!-- -->{ <span class="lg-highlight-attr">getParameter</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">featureCompatibilityVersion</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To upgrade to MongoDB 6.0, refer to the upgrade instructions specific to
your MongoDB deployment:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-upgrade-standalone/#std-label-6.0-upgrade-standalone">
Upgrade a Standalone to 6.0
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-upgrade-replica-set/#std-label-6.0-upgrade-replica-set">
Upgrade a Replica Set to 6.0
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/6.0-upgrade-sharded-cluster/#std-label-6.0-upgrade-sharded-cluster">
Upgrade a Sharded Cluster to 6.0
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
If you need guidance on upgrading to 6.0, MongoDB professional services
offer major version upgrade support to help ensure a smooth transition
without interruption to your MongoDB application. To learn more, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/products/consulting?tck=docs_server" target="_self">
<span>
MongoDB Consulting
<!-- -->
.
</span>
</a>
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Downgrade Consideration
<a class="headerlink leafygreen-ui-1kepx47" href="#downgrade-consideration" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="downgrade-consideration">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
MongoDB only supports single-version downgrades. You cannot downgrade to a
release that is multiple versions behind your current release.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, you may downgrade a
<!-- -->
6.0-series
<!-- -->
to a
<!-- -->
5.0-series
<!-- -->
deployment.
However, further downgrading that
<!-- -->
5.0-series
<!-- -->
deployment to a
<!-- -->
4.4-series
<!-- -->
deployment is not supported.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0-download">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Download
<a class="headerlink leafygreen-ui-1kepx47" href="#download" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="download">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To download MongoDB 6.0, go to the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/try/download?tck=docs_server" target="_self">
<span>
MongoDB Download Center
<!-- -->
.
</span>
</a>
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-6.0-known-issues">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Known Issues
<a class="headerlink leafygreen-ui-1kepx47" href="#known-issues" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="known-issues">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This section describes known issues in MongoDB 6.0 and their resolution
status.
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:40%"/>
<col style="width:40%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
In Version
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Issue
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Status
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
6.0.0
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://jira.mongodb.org/browse/SERVER-68062" rel="noopener noreferrer">
<span>
SERVER-68062
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
: Multi-stage aggregations that use
$geoNear may violate constraints.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Resolved in 6.0.1.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Report an Issue
<a class="headerlink leafygreen-ui-1kepx47" href="#report-an-issue" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="report-an-issue">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To report an issue, see the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://github.com/mongodb/mongo/wiki/Submit-Bug-Reports" rel="noopener noreferrer">
<span>
MongoDB GitHub repository
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
for
instructions on how to file a JIRA ticket for the MongoDB server or one
of the related projects.
</p>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/query/lt/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$lt
<a class="headerlink leafygreen-ui-1kepx47" href="#-lt" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-lt">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="query">
<dt>
<code class="leafygreen-ui-1l06pbn">
$lt
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-query-op.-lt" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-query-op.-lt">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
<em>
Syntax
</em>
:
<code class="leafygreen-ui-1l06pbn">
{ field: { $lt: value } }
</code>
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-lt" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$lt
</code>
</span>
</a>
selects the documents where the value of the
<code class="leafygreen-ui-1l06pbn">
field
</code>
is less than (i.e.
<code class="leafygreen-ui-1l06pbn">
<
</code>
) the specified
<code class="leafygreen-ui-1l06pbn">
value
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
For most data types,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query-comparison/">
comparison
operators
</a>
only perform
comparisons on fields where the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-bson-types">
BSON type
</a>
matches the
query value's type. MongoDB supports limited cross-BSON comparison
through
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#std-label-type-bracketing">
Type Bracketing
<!-- -->
.
</a>
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following examples use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Create the
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.insertMany( [\n {\n \"item\": \"nuts\", \"quantity\": 30,\n \"carrier\": { \"name\": \"Shipit\", \"fee\": 3 }\n },\n {\n \"item\": \"bolts\", \"quantity\": 50,\n \"carrier\": { \"name\": \"Shipit\", \"fee\": 4 }\n },\n {\n \"item\": \"washers\", \"quantity\": 10,\n \"carrier\": { \"name\": \"Shipit\", \"fee\": 1 }\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"nuts"</span>, <span class="lg-highlight-string">"quantity"</span>: <span class="lg-highlight-number">30</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"carrier"</span>: <!-- -->{ <span class="lg-highlight-string">"name"</span>: <span class="lg-highlight-string">"Shipit"</span>, <span class="lg-highlight-string">"fee"</span>: <span class="lg-highlight-number">3</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"bolts"</span>, <span class="lg-highlight-string">"quantity"</span>: <span class="lg-highlight-number">50</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"carrier"</span>: <!-- -->{ <span class="lg-highlight-string">"name"</span>: <span class="lg-highlight-string">"Shipit"</span>, <span class="lg-highlight-string">"fee"</span>: <span class="lg-highlight-number">4</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"washers"</span>, <span class="lg-highlight-string">"quantity"</span>: <span class="lg-highlight-number">10</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"carrier"</span>: <!-- -->{ <span class="lg-highlight-string">"name"</span>: <span class="lg-highlight-string">"Shipit"</span>, <span class="lg-highlight-string">"fee"</span>: <span class="lg-highlight-number">1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Match Document Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#match-document-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="match-document-fields">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Select all documents in the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection where
<code class="leafygreen-ui-1l06pbn">
quantity
</code>
is less than
<code class="leafygreen-ui-1l06pbn">
20
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { quantity: { $lt: 20 } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">quantity</span>: <!-- -->{ <span class="lg-highlight-attr">$lt</span>: <span class="lg-highlight-number">20</span> } } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Example output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n _id: ObjectId(\"61ba634dfe687fce2f04241f\"),\n item: 'washers',\n quantity: 10,\n carrier: { name: 'Shipit', fee: 1 }\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"61ba634dfe687fce2f04241f"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'washers'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">10</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">carrier</span>: <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'Shipit'</span>, <span class="lg-highlight-attr">fee</span>: <span class="lg-highlight-number">1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Perform an Update Based on Embedded Document Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#perform-an-update-based-on-embedded-document-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="perform-an-update-based-on-embedded-document-fields">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following example sets the
<code class="leafygreen-ui-1l06pbn">
price
</code>
field based on a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-lt" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$lt
</code>
</span>
</a>
comparison against a field in an embedded document.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.updateMany( { \"carrier.fee\": { $lt: 20 } }, { $set: { price: 9.99 } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">updateMany</span>( <!-- -->{ <span class="lg-highlight-string">"carrier.fee"</span>: <!-- -->{ <span class="lg-highlight-attr">$lt</span>: <span class="lg-highlight-number">20</span> } }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">9.99</span> } } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Example output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n _id: ObjectId(\"61ba634dfe687fce2f04241d\"),\n item: 'nuts',\n quantity: 30,\n carrier: { name: 'Shipit', fee: 3 },\n price: 9.99\n},\n{\n _id: ObjectId(\"61ba634dfe687fce2f04241e\"),\n item: 'bolts',\n quantity: 50,\n carrier: { name: 'Shipit', fee: 4 },\n price: 9.99\n},\n{\n _id: ObjectId(\"61ba634dfe687fce2f04241f\"),\n item: 'washers',\n quantity: 10,\n carrier: { name: 'Shipit', fee: 1 },\n price: 9.99\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"61ba634dfe687fce2f04241d"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'nuts'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">30</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">carrier</span>: <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'Shipit'</span>, <span class="lg-highlight-attr">fee</span>: <span class="lg-highlight-number">3</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">9.99</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"61ba634dfe687fce2f04241e"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'bolts'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">50</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">carrier</span>: <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'Shipit'</span>, <span class="lg-highlight-attr">fee</span>: <span class="lg-highlight-number">4</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">9.99</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"61ba634dfe687fce2f04241f"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'washers'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">10</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">carrier</span>: <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'Shipit'</span>, <span class="lg-highlight-attr">fee</span>: <span class="lg-highlight-number">1</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">9.99</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
This
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.updateMany/#mongodb-method-db.collection.updateMany">
<code class="leafygreen-ui-1l06pbn">
updateMany()
</code>
</a>
operation searches for an
embedded document,
<code class="leafygreen-ui-1l06pbn">
carrier
</code>
, with a subfield named
<code class="leafygreen-ui-1l06pbn">
fee
</code>
. It sets
<code class="leafygreen-ui-1l06pbn">
{ price: 9.99 }
</code>
in each document where
<code class="leafygreen-ui-1l06pbn">
fee
</code>
has a value less than
20.
</p>
<p class="leafygreen-ui-1kp3ins">
To set the value of the
<code class="leafygreen-ui-1l06pbn">
price
</code>
field in only the first document
where
<code class="leafygreen-ui-1l06pbn">
carrier.fee
</code>
is less than 20, use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.updateOne/#mongodb-method-db.collection.updateOne">
<code class="leafygreen-ui-1l06pbn">
updateOne()
</code>
.
</a>
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
find()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/set/#mongodb-update-up.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
</p>
</li>
</ul>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/db.collection.getSearchIndexes/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
db.collection.getSearchIndexes()
<a class="headerlink leafygreen-ui-1kepx47" href="#db.collection.getsearchindexes--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="db.collection.getsearchindexes--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#command-fields" target="_self">
<span>
Command Fields
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#access-control" target="_self">
<span>
Access Control
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#output" target="_self">
<span>
Output
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#index-status-details" target="_self">
<span>
Index Status Details
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#synonym-mapping-details" target="_self">
<span>
Synonym Mapping Details
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#atlas-search-index-statuses" target="_self">
<span>
Atlas Search Index Statuses
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#return-all-search-indexes" target="_self">
<span>
Return All Search Indexes
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#return-a-single-search-index" target="_self">
<span>
Return a Single Search Index
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
db.collection.getSearchIndexes()
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-db.collection.getSearchIndexes" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-db.collection.getSearchIndexes">
</div>
</a>
</dt>
<dd>
</dd>
</dl>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
7.0
</em>
:
<!-- -->
<!-- -->
(
<em>
Also available starting in 6.0.7
</em>
)
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
Returns information about existing
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/atlas-search/atlas-search-overview/#fts-indexes" target="_self">
<span>
Atlas Search indexes
</span>
</a>
on a specified
collection.
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
mongosh Method
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This page documents a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
method. This is
<em>
not
</em>
the documentation for a language-specific driver, such as Node.js.
</p>
<p class="leafygreen-ui-1kp3ins">
For MongoDB API drivers, refer to the language-specific
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
MongoDB driver documentation
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This method is available in deployments hosted in the following environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This command is not supported in M0, M2, and M5 clusters or in serverless instances.
For more information, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/" target="_self">
<span>
Unsupported Commands
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Command syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.<collection>.getSearchIndexes(<indexname>)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<!-- --><<!-- -->collection<!-- -->><!-- -->.<span class="lg-highlight-title lg-highlight-function">getSearchIndexes</span>(<<!-- -->indexName<!-- -->><!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Command Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#command-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="command-fields">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
getSearchIndexes()
</code>
takes this field:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Necessity
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
indexName
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Optional
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Name of the index to return information about. If you omit the
<code class="leafygreen-ui-1l06pbn">
indexName
</code>
field,
<code class="leafygreen-ui-1l06pbn">
getSearchIndexes()
</code>
returns information
about all Atlas Search indexes on the collection.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Access Control
<a class="headerlink leafygreen-ui-1kepx47" href="#access-control" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="access-control">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
If your deployment enforces access control, the user running
<code class="leafygreen-ui-1l06pbn">
getSearchIndexes()
</code>
must have the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-listSearchIndexes">
<code class="leafygreen-ui-1l06pbn">
listSearchIndexes
</code>
</a>
privilege
action on the database or collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n resource: {\n db : <database>,\n collection: <collection>\n },\n actions: [ \"listSearchIndexes\" ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">resource</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->db <!-- -->: <<!-- -->database<!-- -->><!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">collection</span>: <<!-- -->collection<!-- -->></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">actions</span>: <!-- -->[ <span class="lg-highlight-string">"listSearchIndexes"</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The built-in
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/built-in-roles/#mongodb-authrole-read">
<code class="leafygreen-ui-1l06pbn">
read
</code>
</a>
role provides the the
<code class="leafygreen-ui-1l06pbn">
listSearchIndexes
</code>
privilege. The following example grants the
<code class="leafygreen-ui-1l06pbn">
read
</code>
role on the
<code class="leafygreen-ui-1l06pbn">
qa
</code>
database:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.grantRolesToUser(\n \"<user>\",\n [ { role: \"read\", db: \"qa\" } ]\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">grantRolesToUser</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"<user>"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">role</span>: <span class="lg-highlight-string">"read"</span>, <span class="lg-highlight-attr">db</span>: <span class="lg-highlight-string">"qa"</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Output
<a class="headerlink leafygreen-ui-1kepx47" href="#output" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="output">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
getSearchIndexes()
</code>
returns an array of documents. Each document in the array
contains the following fields:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:10%"/>
<col style="width:20%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
id
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Unique identifier for the index.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
name
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Name of the index.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
status
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Status of the index. For more information, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-search-index-status" target="_self">
<span>
Atlas Search Index Statuses
</span>
</a>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
queryable
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Indicates whether the index is ready to be queried.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
latestDefinitionVersion
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Describes the version of the index.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
latestDefinitionVersion.version
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Version number associated with the index definition. When you
update an index definition, the version number increments
automatically.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
latestDefinitionVersion.createdAt
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
date
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Time when the current index definition was created.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
latestDefinition
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The most recent definition for the index. For more information,
see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/createSearchIndexes/#std-label-search-index-definition-create">
Search Index Definition Syntax
<!-- -->
.
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
statusDetail
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array of documents
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Contains the status of the index on each search host
(
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
).
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
statusDetail.[n].hostname
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Hostname of the corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
statusDetail.[n].status
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Status of the index on the corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
statusDetail.[n].queryable
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Indicates whether the index is ready to be queried on the
corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
statusDetail.[n].mainIndex
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Contains status information about the active index on the
corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
For details, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-search-index-details" target="_self">
<span>
Index Status Details
</span>
</a>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
statusDetail.[n].stagedIndex
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Contains status information about an index being built in the
background on the corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
. This field only
appears if you are building a new index to update an existing
active index.
</p>
<p class="leafygreen-ui-1kp3ins">
For details, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-search-index-details" target="_self">
<span>
Index Status Details
</span>
</a>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
synonymMappingStatus
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Status of the index's
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/atlas-search/synonyms/#std-label-synonyms-ref" target="_self">
<span>
synonym mappings
</span>
</a>
.
This field only appears if the index has synonyms defined. Can be
one of the following values:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
BUILDING
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
FAILED
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
READY
</code>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
The returned status is a summary of the synonym mappings on each
individual
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
synonymMappingStatusDetail
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array of documents
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Contains the status of the index's synonym mappings on each
search host (
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
). This field (and its subfields) only
appear if the index has synonyms defined.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
synonymMappingStatusDetail.[n].status
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Status for the corresponding synonym mapping across all
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
processes.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
synonymMappingStatusDetail.[n].queryable
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Indicates whether the corresponding synonym mapping can support
queries across all
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
processes.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
message
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Describes an error for the synonym mapping, if applicable. Only
appears if the
<code class="leafygreen-ui-1l06pbn">
status
</code>
for this synonym mapping is
<code class="leafygreen-ui-1l06pbn">
FAILED
</code>
.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-search-index-details">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Index Status Details
<a class="headerlink leafygreen-ui-1kepx47" href="#index-status-details" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="index-status-details">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following table describes the embedded fields of the following
documents:
-
<code class="leafygreen-ui-1l06pbn">
statusDetail.[mongot].mainIndex
</code>
-
<code class="leafygreen-ui-1l06pbn">
statusDetail.[mongot].stagedIndex
</code>
</p>
<p class="leafygreen-ui-1kp3ins">
The fields describe the index status on a specific
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:10%"/>
<col style="width:30%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
status
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The state of the index generation on the corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
queryable
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Indicates whether the index generation is ready to be queried on
the corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
synonymMappingStatus
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The state of the index generation's synonym mappings on the
corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
. Only present if the index has synonyms
defined.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
synonymMappingStatusDetails
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Contains the status of the index's synonym mappings on the
corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
. This field (and its subfields) only
appear if the index has synonyms defined.
</p>
<p class="leafygreen-ui-1kp3ins">
For more information, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-search-mapping-details" target="_self">
<span>
Synonym Mapping Details
</span>
</a>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
definitionVersion
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Describes the index definition version that this index generation
is being built with.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
definitionVersion.version
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Version number that the index generation is using on the
corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
. When you update an index definition,
the updated index builds with an incremented version number.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
definitionVersion.createdAt
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
date
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Time when the index definition was created.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
definition
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The definition that this index is being built with.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-search-mapping-details">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Synonym Mapping Details
<a class="headerlink leafygreen-ui-1kepx47" href="#synonym-mapping-details" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="synonym-mapping-details">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following table describes the embedded fields of the following
objects:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
statusDetail.mainIndex.synonymMappingStatusDetails.<synonymMapping>
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
statusDetail.stagedIndex.synonymMappingStatusDetails<synonymMapping>
</code>
</p>
</li>
</ul>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:10%"/>
<col style="width:30%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
status
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Status for the synonym mapping across on the corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
process.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
queryable
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Indicates whether the synonym mapping can support queries on the
corresponding
<code class="leafygreen-ui-1l06pbn">
mongot
</code>
process.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
message
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Describes an error for the synonym mapping, if applicable. Only
appears if the
<code class="leafygreen-ui-1l06pbn">
status
</code>
for this synonym mapping is
<code class="leafygreen-ui-1l06pbn">
FAILED
</code>
.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-search-index-status">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Atlas Search Index Statuses
<a class="headerlink leafygreen-ui-1kepx47" href="#atlas-search-index-statuses" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="atlas-search-index-statuses">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
status
</code>
field in the
<code class="leafygreen-ui-1l06pbn">
getSearchIndexes()
</code>
output can be one of the
following:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:30%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Status
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
BUILDING
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The following scenarios can cause an index to be in the
<code class="leafygreen-ui-1l06pbn">
BUILDING
</code>
state:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Atlas is building the index or re-building the index after an
edit.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Atlas Search cannot keep up with indexing changes to the
collection. In this case, Atlas rebuilds the index in the
background.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
When the index is in the
<code class="leafygreen-ui-1l06pbn">
BUILDING
</code>
state:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
For a new index, Atlas Search cannot use the index for queries
until the index build is complete.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
For an existing index, Atlas Search uses the old index
definition for queries until the index rebuild is complete.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
An index in the
<code class="leafygreen-ui-1l06pbn">
BUILDING
</code>
state may be queryable or
non-queryable.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
DOES_NOT_EXIST
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The index does not exist.
</p>
<p class="leafygreen-ui-1kp3ins">
An index in the
<code class="leafygreen-ui-1l06pbn">
DOES_NOT_EXIST
</code>
state is always non-queryable.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
DELETING
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Atlas is deleting the index.
</p>
<p class="leafygreen-ui-1kp3ins">
An index in the
<code class="leafygreen-ui-1l06pbn">
DELETING
</code>
state is always non-queryable.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
FAILED
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The index build failed. Indexes can enter the
<code class="leafygreen-ui-1l06pbn">
FAILED
</code>
state
due to an invalid index definition.
</p>
<p class="leafygreen-ui-1kp3ins">
An index in the
<code class="leafygreen-ui-1l06pbn">
FAILED
</code>
state may be queryable or
non-queryable.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
PENDING
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Atlas has not yet started building the index.
</p>
<p class="leafygreen-ui-1kp3ins">
An index in the
<code class="leafygreen-ui-1l06pbn">
PENDING
</code>
state is always non-queryable.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
READY
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The index is ready and can support queries.
</p>
<p class="leafygreen-ui-1kp3ins">
An index in the
<code class="leafygreen-ui-1l06pbn">
READY
</code>
state is always queryable.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
STALE
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The index is queryable but has stopped replicating data from the
indexed collection. Searches on the index may return out-of-date
data.
</p>
<p class="leafygreen-ui-1kp3ins">
Indexes can enter the
<code class="leafygreen-ui-1l06pbn">
STALE
</code>
state due to replication errors.
</p>
<p class="leafygreen-ui-1kp3ins">
An index in the
<code class="leafygreen-ui-1l06pbn">
STALE
</code>
state is always queryable.
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
These examples demonstrate how to:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-getSearchIndexes-return-all" target="_self">
<span>
Return All Search Indexes
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-getSearchIndexes-return-one" target="_self">
<span>
Return a Single Search Index
</span>
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-getSearchIndexes-return-all">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Return All Search Indexes
<a class="headerlink leafygreen-ui-1kepx47" href="#return-all-search-indexes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="return-all-search-indexes">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following example returns all Atlas Search indexes on the
<code class="leafygreen-ui-1l06pbn">
movies
</code>
collection. The
<code class="leafygreen-ui-1l06pbn">
movies
</code>
collection contains two search indexes:
<code class="leafygreen-ui-1l06pbn">
default
</code>
and
<code class="leafygreen-ui-1l06pbn">
synonym_mappings
</code>
.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.movies.getSearchIndexes()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">movies</span>.<span class="lg-highlight-title lg-highlight-function">getSearchIndexes</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Sample output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n id: '6524096020da840844a4c4a7',\n name: 'default',\n status: 'BUILDING',\n queryable: true,\n latestDefinitionVersion: {\n version: 2,\n createdAt: ISODate(\"2023-10-09T14:51:57.355Z\")\n },\n latestDefinition: {\n mappings: { dynamic: true },\n storedSource: { include: [ 'awards.text' ] }\n },\n statusDetail: [\n {\n hostname: 'atlas-n1cm1j-shard-00-02',\n status: 'BUILDING',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:08:32.000Z\")\n },\n definition: { mappings: { dynamic: true, fields: {} } }\n },\n stagedIndex: {\n status: 'PENDING',\n queryable: false,\n definitionVersion: {\n version: 1,\n createdAt: ISODate(\"2023-10-09T14:51:29.000Z\")\n },\n definition: {\n mappings: { dynamic: true, fields: {} },\n storedSource: true\n }\n }\n },\n {\n hostname: 'atlas-n1cm1j-shard-00-01',\n status: 'BUILDING',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:08:32.000Z\")\n },\n definition: { mappings: { dynamic: true, fields: {} } }\n },\n stagedIndex: {\n status: 'PENDING',\n queryable: false,\n definitionVersion: {\n version: 1,\n createdAt: ISODate(\"2023-10-09T14:51:29.000Z\")\n },\n definition: {\n mappings: { dynamic: true, fields: {} },\n storedSource: true\n }\n }\n },\n {\n hostname: 'atlas-n1cm1j-shard-00-00',\n status: 'BUILDING',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:08:32.000Z\")\n },\n definition: { mappings: { dynamic: true, fields: {} } }\n }\n }\n ]\n },\n {\n id: '65240be420da840844a4d077',\n name: 'synonym_mappings',\n status: 'READY',\n queryable: true,\n latestDefinitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.305Z\")\n },\n latestDefinition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: { type: 'string' }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ],\n statusDetail: [\n {\n hostname: 'atlas-n1cm1j-shard-00-02',\n status: 'READY',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.000Z\")\n },\n definition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: {\n type: 'string',\n indexOptions: 'offsets',\n store: true,\n norms: 'include'\n }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ]\n }\n },\n {\n hostname: 'atlas-n1cm1j-shard-00-01',\n status: 'READY',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.000Z\")\n },\n definition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: {\n type: 'string',\n indexOptions: 'offsets',\n store: true,\n norms: 'include'\n }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ]\n }\n },\n {\n hostname: 'atlas-n1cm1j-shard-00-00',\n status: 'READY',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.000Z\")\n },\n definition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: {\n type: 'string',\n indexOptions: 'offsets',\n store: true,\n norms: 'include'\n }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ]\n }\n }\n ]\n }\n]","programmingLanguage":"JavaScript"}
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<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">id</span>: <span class="lg-highlight-string">'6524096020da840844a4c4a7'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'default'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'BUILDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">latestDefinitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:51:57.355Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">latestDefinition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">storedSource</span>: <!-- -->{ <span class="lg-highlight-attr">include</span>: <!-- -->[ <span class="lg-highlight-string">'awards.text'</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">statusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-02'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'BUILDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:08:32.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{ <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">stagedIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'PENDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">false</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:51:29.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">storedSource</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-01'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'BUILDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:08:32.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{ <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">stagedIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'PENDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">false</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:51:29.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">storedSource</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-00'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'BUILDING'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:08:32.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{ <span class="lg-highlight-attr">mappings</span>: <!-- -->{ <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">fields</span>: <!-- -->{<!-- -->} } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">id</span>: <span class="lg-highlight-string">'65240be420da840844a4d077'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mappings'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">latestDefinitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.305Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">latestDefinition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{ <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">statusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-02'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">indexOptions</span>: <span class="lg-highlight-string">'offsets'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">store</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">norms</span>: <span class="lg-highlight-string">'include'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-01'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">indexOptions</span>: <span class="lg-highlight-string">'offsets'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">store</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">norms</span>: <span class="lg-highlight-string">'include'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-00'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">indexOptions</span>: <span class="lg-highlight-string">'offsets'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">store</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">norms</span>: <span class="lg-highlight-string">'include'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-getSearchIndexes-return-one">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Return a Single Search Index
<a class="headerlink leafygreen-ui-1kepx47" href="#return-a-single-search-index" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="return-a-single-search-index">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following example returns the
<code class="leafygreen-ui-1l06pbn">
synonym_mappings
</code>
index on the
<code class="leafygreen-ui-1l06pbn">
movies
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.movies.getSearchIndexes(\"synonym_mappings\")","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">movies</span>.<span class="lg-highlight-title lg-highlight-function">getSearchIndexes</span>(<span class="lg-highlight-string">"synonym_mappings"</span>)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Sample output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n id: '65240be420da840844a4d077',\n name: 'synonym_mappings',\n status: 'READY',\n queryable: true,\n latestDefinitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.305Z\")\n },\n latestDefinition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: { type: 'string' }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ],\n statusDetail: [\n {\n hostname: 'atlas-n1cm1j-shard-00-02',\n status: 'READY',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.000Z\")\n },\n definition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: {\n type: 'string',\n indexOptions: 'offsets',\n store: true,\n norms: 'include'\n }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ]\n }\n },\n {\n hostname: 'atlas-n1cm1j-shard-00-01',\n status: 'READY',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.000Z\")\n },\n definition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: {\n type: 'string',\n indexOptions: 'offsets',\n store: true,\n norms: 'include'\n }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ]\n }\n },\n {\n hostname: 'atlas-n1cm1j-shard-00-00',\n status: 'READY',\n queryable: true,\n mainIndex: {\n status: 'READY',\n queryable: true,\n definitionVersion: {\n version: 0,\n createdAt: ISODate(\"2023-10-09T14:19:16.000Z\")\n },\n definition: {\n mappings: {\n dynamic: true,\n fields: {\n fullplot: {\n type: 'string',\n indexOptions: 'offsets',\n store: true,\n norms: 'include'\n }\n }\n },\n synonyms: [\n {\n name: 'synonym_mapping',\n analyzer: 'lucene.english',\n source: { collection: 'synonyms' }\n }\n ]\n },\n synonymMappingStatus: 'READY',\n synonymMappingStatusDetail: [\n {\n synonym_mapping: {\n status: 'READY',\n queryable: true\n }\n }\n ]\n }\n }\n ]\n }\n]","programmingLanguage":"JavaScript"}
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<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">id</span>: <span class="lg-highlight-string">'65240be420da840844a4d077'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mappings'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">latestDefinitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.305Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">latestDefinition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{ <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">statusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-02'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">indexOptions</span>: <span class="lg-highlight-string">'offsets'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">store</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">norms</span>: <span class="lg-highlight-string">'include'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-01'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">indexOptions</span>: <span class="lg-highlight-string">'offsets'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">store</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">norms</span>: <span class="lg-highlight-string">'include'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">hostname</span>: <span class="lg-highlight-string">'atlas-n1cm1j-shard-00-00'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mainIndex</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definitionVersion</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">version</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">createdAt</span>: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2023-10-09T14:19:16.000Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">definition</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">mappings</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">dynamic</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fullplot</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'string'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">indexOptions</span>: <span class="lg-highlight-string">'offsets'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">store</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">norms</span>: <span class="lg-highlight-string">'include'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonyms</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'synonym_mapping'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">analyzer</span>: <span class="lg-highlight-string">'lucene.english'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">source</span>: <!-- -->{ <span class="lg-highlight-attr">collection</span>: <span class="lg-highlight-string">'synonyms'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatus</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonymMappingStatusDetail</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">synonym_mapping</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'READY'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">queryable</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/sh.getShardedDataDistribution/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
sh.getShardedDataDistribution()
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<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
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</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#learn-more" target="_self">
<span>
Learn More
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
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<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
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<div class="css-1btu0w3 evvkmar0" id="definition">
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</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
sh.getShardedDataDistribution()
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-sh.getShardedDataDistribution" title="Permalink to this definition">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
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</div>
</a>
</dt>
<dd>
</dd>
</dl>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0.3
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
Returns data distribution information for sharded collections.
<code class="leafygreen-ui-1l06pbn">
sh.getShardedDataDistribution()
</code>
is a shell helper method for the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/shardedDataDistribution/#mongodb-pipeline-pipe.-shardedDataDistribution">
<code class="leafygreen-ui-1l06pbn">
$shardedDataDistribution
</code>
</a>
aggregation pipeline stage.
</p>
<p class="leafygreen-ui-1kp3ins">
You can only run the method from a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
session
connected to a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
instance.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
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<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The method has the following syntax:
</p>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.getShardedDataDistribution()","programmingLanguage":"JavaScript"}
</script>
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<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">getShardedDataDistribution</span>(<!-- -->)</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
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<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following example runs the method:
</p>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.getShardedDataDistribution()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">getShardedDataDistribution</span>(<!-- -->)</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
<p class="leafygreen-ui-1kp3ins">
The method returns an array of documents for each sharded collection.
For example:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n ns: 'config.system.sessions',\n shards: [\n {\n shardName: 'shard1',\n numOrphanedDocs: 0,\n numOwnedDocuments: 18,\n ownedSizeBytes: 1782,\n orphanedSizeBytes: 0\n }\n ]\n },\n {\n ns: 'records.people',\n shards: [\n {\n shardName: 'shard1',\n numOrphanedDocs: 0,\n numOwnedDocuments: 21,\n ownedSizeBytes: 134,\n orphanedSizeBytes: 0\n }\n ]\n }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">ns</span>: <span class="lg-highlight-string">'config.system.sessions'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">shards</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">shardName</span>: <span class="lg-highlight-string">'shard1'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">numOrphanedDocs</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">numOwnedDocuments</span>: <span class="lg-highlight-number">18</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">ownedSizeBytes</span>: <span class="lg-highlight-number">1782</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">orphanedSizeBytes</span>: <span class="lg-highlight-number">0</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">ns</span>: <span class="lg-highlight-string">'records.people'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">shards</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">shardName</span>: <span class="lg-highlight-string">'shard1'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">numOrphanedDocs</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">numOwnedDocuments</span>: <span class="lg-highlight-number">21</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">ownedSizeBytes</span>: <span class="lg-highlight-number">134</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">orphanedSizeBytes</span>: <span class="lg-highlight-number">0</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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<p class="leafygreen-ui-1kp3ins">
The following table describes the output fields:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:30%"/>
<col style="width:15%"/>
<col style="width:55%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field Name
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Data Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ns
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Namespace of the sharded collection.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
shards
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Shards in the collection with the data distribution
information for each shard.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
shards.numOrphanedDocs
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Number of orphaned documents in the shard.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
shards.numOwnedDocuments
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Number of documents owned by the shard.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
shards.ownedSizeBytes
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Size in bytes of documents owned by the shard when
uncompressed.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
shards.orphanedSizeBytes
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Size in bytes of orphaned documents in the shard when
uncompressed.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Learn More
<a class="headerlink leafygreen-ui-1kepx47" href="#learn-more" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="learn-more">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/shardedDataDistribution/#mongodb-pipeline-pipe.-shardedDataDistribution">
<code class="leafygreen-ui-1l06pbn">
$shardedDataDistribution
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.enableSharding/#mongodb-method-sh.enableSharding">
<code class="leafygreen-ui-1l06pbn">
sh.enableSharding()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.addShard/#mongodb-method-sh.addShard">
<code class="leafygreen-ui-1l06pbn">
sh.addShard()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.shardCollection/#mongodb-method-sh.shardCollection">
<code class="leafygreen-ui-1l06pbn">
sh.shardCollection()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.reshardCollection/#mongodb-method-sh.reshardCollection">
<code class="leafygreen-ui-1l06pbn">
sh.reshardCollection()
</code>
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/administration/tcmalloc-performance/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
TCMalloc Performance Optimization for a Self-Managed Deployment
<a class="headerlink leafygreen-ui-1kepx47" href="#tcmalloc-performance-optimization-for-a-self-managed-deployment" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="tcmalloc-performance-optimization-for-a-self-managed-deployment">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#platform-support" target="_self">
<span>
Platform Support
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#enable-transparent-hugepages--thp-" target="_self">
<span>
Enable Transparent Hugepages (THP)
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#enable-per-cpu-caches" target="_self">
<span>
Enable Per-CPU Caches
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#learn-more" target="_self">
<span>
Learn More
</span>
</a>
</li>
</ul>
</div>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
8.0
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 8.0, MongoDB uses an upgraded version of TCMalloc that
uses
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-per-CPU-cache">
per-CPU caches
</a>
, instead of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-per-thread-cache">
per-thread caches
</a>
, to reduce memory fragmentation and make your database more
resilient to high-stress workloads.
</p>
<p class="leafygreen-ui-1kp3ins">
To use the new TCMalloc version:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Use a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-tcmalloc-new-platform-support" target="_self">
<span>
supported operating system
<!-- -->
.
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-tcmalloc-new-enable-thp" target="_self">
<span>
Enable THP
<!-- -->
.
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-tcmalloc-new-per-cpu-caches" target="_self">
<span>
Enable per-CPU caches
<!-- -->
.
</span>
</a>
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-tcmalloc-new-platform-support">
</span>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Platform Support
<a class="headerlink leafygreen-ui-1kepx47" href="#platform-support" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="platform-support">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Operating systems that support MongoDB 8.0 also support the updated
TCMalloc,
<strong>
except
</strong>
for the following:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
RHEL 8 / CentOS 8 / Oracle 8 on the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/production-notes/#std-label-prod-notes-supported-platforms-PPC64LE">
PPC64LE
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/production-notes/#std-label-prod-notes-supported-platforms-s390x">
s390x
</a>
architectures
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
RHEL 9 / CentOS 9 / Oracle 9 on the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/production-notes/#std-label-prod-notes-supported-platforms-PPC64LE">
PPC64LE
</a>
architecture
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
These operating systems use the legacy TCMalloc version. If you use
these operating systems,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/disable-transparent-huge-pages/#std-label-disable-thp">
disable THP
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
Windows uses the legacy TCMalloc version and does not support the
updated TCMalloc.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-tcmalloc-new-enable-thp">
</span>
<span class="leafygreen-ui-1qnjd6d" id="std-label-enable-thp">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Enable Transparent Hugepages (THP)
<a class="headerlink leafygreen-ui-1kepx47" href="#enable-transparent-hugepages--thp-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="enable-transparent-hugepages--thp-">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Transparent Hugepages (THP) is a Linux memory management system
that reduces the overhead of Translation Lookaside Buffer (TLB) lookups. THP
achieves this by combining small pages and making them appear as larger
memory pages to the application.
</p>
<p class="leafygreen-ui-1kp3ins">
In MongoDB 8.0 and later, ensure that THP is enabled before
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
starts by creating a service file for your
platform's initialization system. If you are using
MongoDB 7.0 or earlier,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/disable-transparent-huge-pages/#std-label-disable-thp">
disable THP
<!-- -->
.
</a>
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
You can enable THP at the system level and disable it on the process level.
If you have multiple MongoDB processes on a single machine, ensure that
processes on version 8.0 enable THP, while processes on 7.0 or earlier
disable THP.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Additionally, for
<span class="leafygreen-ui-vm4wms" tabindex="0">
RHEL
</span>
and CentOS systems
that use
<code class="leafygreen-ui-1l06pbn">
ktune
</code>
and
<code class="leafygreen-ui-1l06pbn">
tuned
</code>
performance profiles, you must also create a
custom
<code class="leafygreen-ui-1l06pbn">
tuned
</code>
profile.
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Create a Service File
<a class="headerlink leafygreen-ui-1kepx47" href="#create-a-service-file" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="create-a-service-file">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To create a service file that enables THP, use the built-in initialization
system for your platform. Recent versions of Linux typically use
<strong>
systemd
</strong>
,
which uses the
<code class="leafygreen-ui-1l06pbn">
systemctl
</code>
command. Older versions of Linux tend to
use
<strong>
System V init
</strong>
, which uses the
<code class="leafygreen-ui-1l06pbn">
service
</code>
command. For more information,
see the documentation for your operating system.
</p>
<p class="leafygreen-ui-1kp3ins">
Use the initialization system for your platform:
</p>
<div aria-hidden="true">
</div>
<div class="leafygreen-ui-1b75luy" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-17">
<div aria-label="Tabs to describe usage of initd-service/systemd-systemctl" aria-orientation="horizontal" class="leafygreen-ui-m8p1vb lg-ui-tab-list-0000" data-lgid="lg-tabs-tab_list" role="tablist">
<button aria-controls="_jx4917uc3" aria-selected="true" class="leafygreen-ui-1l773z1" data-text="" id="_t333vw8x0" name="" role="tab" tabindex="0">
<div class="leafygreen-ui-1nxuzmg">
systemd (systemctl)
</div>
</button>
<button aria-controls="_cy5u22ac5" aria-selected="false" class="leafygreen-ui-1ogxb8f" data-text="" id="_cr54z0bhv" name="" role="tab" tabindex="-1">
<div class="leafygreen-ui-1nxuzmg">
System V Init (service)
</div>
</button>
</div>
<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
</div>
</div>
<div class="lg-ui-tab-panels-0000" data-lgid="lg-tabs-tab_panels">
<div>
<div aria-labelledby="_3hjmuid5s" class="" id="_f5cdqt0sh" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"HowTo","steps":[{"@type":"HowToStep","text":"Create the following file and save it at\n/etc/systemd/system/enable-transparent-huge-pages.service:Some versions of Red Hat Enterprise Linux, and potentially other Red\nHat-based derivatives, use a different path for the THP enabled\nfile:Verify which path is in use on your system and update the\nenable-transparent-huge-pages.service file accordingly.","name":"Create the systemd unit file"},{"@type":"HowToStep","text":"To reload the systemd unit files and make\nenable-transparent-huge-pages.service available for use, run the\nfollowing command :","name":"Reload systemd unit files"},{"@type":"HowToStep","text":"Run:To verify that the relevant THP settings have changed, run the\nfollowing command:On Red Hat Enterprise Linux and potentially other Red Hat-based\nderivatives, you may instead need to use the following:The output should resemble the following:","name":"Start the service"},{"@type":"HowToStep","text":"To ensure that this setting is applied each time the operating system\nstarts, run the following command:","name":"Configure your operating system to run it on boot."},{"@type":"HowToStep","text":"If you use tuned or ktune proffiles on\nRHEL (Red Hat Enterprise Linux)/ CentOS, you must also create\na custom tuned profile.","name":"(Optional) Customize tuned or ktune profile"}],"name":"Create a Service File - systemd (systemctl)","image":"https://webimages.mongodb.com/_com_assets/cms/kuyj2focmkbxv7gh3-stacked_default_slate_blue.svg?auto=format%252Ccompress"}
</script>
<div class="css-4nyere eccljxs0">
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
1
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Create the
<code class="leafygreen-ui-1l06pbn">
systemd
</code>
unit file
<a class="headerlink leafygreen-ui-1kepx47" href="#create-the-systemd-unit-file" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="create-the-systemd-unit-file">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Create the following file and save it at
<code class="leafygreen-ui-1l06pbn">
/etc/systemd/system/enable-transparent-huge-pages.service
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[Unit]\nDescription=Enable Transparent Hugepages (THP)\nDefaultDependencies=no\nAfter=sysinit.target local-fs.target\nBefore=mongod.service\n\n[Service]\nType=oneshot\nExecStart=/bin/sh -c 'echo always | tee /sys/kernel/mm/transparent_hugepage/enabled > /dev/null && echo defer+madvise | tee /sys/kernel/mm/transparent_hugepage/defrag > /dev/null && echo 0 | tee /sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_none > /dev/null && echo 1 | tee /proc/sys/vm/overcommit_memory > /dev/null'\n\n[Install]\nWantedBy=basic.target","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[Unit]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">Description=Enable Transparent Hugepages (THP)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">DefaultDependencies=no</td></tr><tr class=""><td class="leafygreen-ui-7razhx">After=sysinit.target local-fs.target</td></tr><tr class=""><td class="leafygreen-ui-7razhx">Before=mongod.service</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">[Service]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">Type=oneshot</td></tr><tr class=""><td class="leafygreen-ui-7razhx">ExecStart=/bin/sh -c 'echo always | tee /sys/kernel/mm/transparent_hugepage/enabled > /dev/null && echo defer+madvise | tee /sys/kernel/mm/transparent_hugepage/defrag > /dev/null && echo 0 | tee /sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_none > /dev/null && echo 1 | tee /proc/sys/vm/overcommit_memory > /dev/null'</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">[Install]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">WantedBy=basic.target</td></tr></tbody></table></code></pre>
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
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<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
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</div>
</div>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Some versions of Red Hat Enterprise Linux, and potentially other Red
Hat-based derivatives, use a different path for the THP
<code class="leafygreen-ui-1l06pbn">
enabled
</code>
file:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"/sys/kernel/mm/redhat_transparent_hugepage/enabled","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">/sys/kernel/mm/redhat_transparent_hugepage/enabled</td></tr></tbody></table></code></pre>
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</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Verify which path is in use on your system and update the
<code class="leafygreen-ui-1l06pbn">
enable-transparent-huge-pages.service
</code>
file accordingly.
</p>
</div>
</div>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
2
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Reload
<code class="leafygreen-ui-1l06pbn">
systemd
</code>
unit files
<a class="headerlink leafygreen-ui-1kepx47" href="#reload-systemd-unit-files" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="reload-systemd-unit-files">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
To reload the
<code class="leafygreen-ui-1l06pbn">
systemd
</code>
unit files and make
<code class="leafygreen-ui-1l06pbn">
enable-transparent-huge-pages.service
</code>
available for use, run the
following command :
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo systemctl daemon-reload","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo systemctl daemon-reload</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
3
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Start the service
<a class="headerlink leafygreen-ui-1kepx47" href="#start-the-service" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="start-the-service">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Run:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo systemctl start enable-transparent-huge-pages","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo systemctl start enable-transparent-huge-pages</td></tr></tbody></table></code></pre>
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To verify that the relevant THP settings have changed, run the
following command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"cat /sys/kernel/mm/transparent_hugepage/enabled && cat /sys/kernel/mm/transparent_hugepage/defrag && cat /sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_none && cat /proc/sys/vm/overcommit_memory","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cat /sys/kernel/mm/transparent_hugepage/enabled && cat /sys/kernel/mm/transparent_hugepage/defrag && cat /sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_none && cat /proc/sys/vm/overcommit_memory</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
On Red Hat Enterprise Linux and potentially other Red Hat-based
derivatives, you may instead need to use the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"cat /sys/kernel/mm/redhat_transparent_hugepage/enabled && cat /sys/kernel/mm/redhat_transparent_hugepage/defrag && cat /sys/kernel/mm/redhat_transparent_hugepage/khugepaged/max_ptes_none && cat /proc/sys/vm/overcommit_memory","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cat /sys/kernel/mm/redhat_transparent_hugepage/enabled && cat /sys/kernel/mm/redhat_transparent_hugepage/defrag && cat /sys/kernel/mm/redhat_transparent_hugepage/khugepaged/max_ptes_none && cat /proc/sys/vm/overcommit_memory</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The output should resemble the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"always\ndefer+madvise\n0\n1","programmingLanguage":"Bash"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">always</td></tr><tr class=""><td class="leafygreen-ui-7razhx">defer+madvise</td></tr><tr class=""><td class="leafygreen-ui-7razhx">0</td></tr><tr class=""><td class="leafygreen-ui-7razhx">1</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
4
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Configure your operating system to run it on boot.
<a class="headerlink leafygreen-ui-1kepx47" href="#configure-your-operating-system-to-run-it-on-boot." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="configure-your-operating-system-to-run-it-on-boot.">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
To ensure that this setting is applied each time the operating system
starts, run the following command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo systemctl enable enable-transparent-huge-pages","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo systemctl enable enable-transparent-huge-pages</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
5
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
(
<em>
Optional
</em>
) Customize tuned or ktune profile
<a class="headerlink leafygreen-ui-1kepx47" href="#-optional--customize-tuned-or-ktune-profile" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-optional--customize-tuned-or-ktune-profile">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
If you use
<code class="leafygreen-ui-1l06pbn">
tuned
</code>
or
<code class="leafygreen-ui-1l06pbn">
ktune
</code>
proffiles on
<span class="leafygreen-ui-vm4wms" tabindex="0">
RHEL
</span>
/ CentOS, you must also create
a custom
<code class="leafygreen-ui-1l06pbn">
tuned
</code>
profile.
</p>
</section>
</div>
</div>
</div>
</div>
</div>
</div>
<div>
<div aria-labelledby="_ld6aqf86c" class="leafygreen-ui-38lglc" id="_qsax27sm5" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"HowTo","steps":[{"@type":"HowToStep","text":"Create the following file and save it at\n/etc/init.d/enable-transparent-hugepages:","name":"Create the init.d script"},{"@type":"HowToStep","text":"Run:","name":"Make the script executable"},{"@type":"HowToStep","text":"Run:To verify that the relevant THP settings have changed, run the\nfollowing command:On Red Hat Enterprise Linux and potentially other Red Hat-based\nderivatives, you may instead need to use the following:The output should resemble the following:","name":"Run the script"},{"@type":"HowToStep","text":"To ensure that this setting is applied each time the operating sytem\nstarts, run the following command for your Linux distribution:DistributionCommandUbuntu and DebianSUSERed Hat, CentOS, Amazon Linux, and derivatives","name":"Configure your operating system to run it on boot"},{"@type":"HowToStep","text":"If you are using tuned or ktune profiles on\nRHEL (Red Hat Enterprise Linux)/ CentOS, you must also create\na custom tuned profile.","name":"(Optional) Customize tuned or ktune profile"}],"name":"Create a Service File - System V Init (service)","image":"https://webimages.mongodb.com/_com_assets/cms/kuyj2focmkbxv7gh3-stacked_default_slate_blue.svg?auto=format%252Ccompress"}
</script>
<div class="css-4nyere eccljxs0">
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
1
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Create the
<code class="leafygreen-ui-1l06pbn">
init.d
</code>
script
<a class="headerlink leafygreen-ui-1kepx47" href="#create-the-init.d-script" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="create-the-init.d-script">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Create the following file and save it at
<code class="leafygreen-ui-1l06pbn">
/etc/init.d/enable-transparent-hugepages
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"#!/bin/bash\n### BEGIN INIT INFO\n# Provides: enable-transparent-hugepages\n# Required-Start: $local_fs\n# Required-Stop:\n# X-Start-Before: mongod mongodb-mms-automation-agent\n# Default-Start: 2 3 4 5\n# Default-Stop: 0 1 6\n# Short-Description: Enable Linux Transparent Hugepages\n# Description: Enable Linux Transparent Hugepages, to improve\n# database performance.\n### END INIT INFO\n\ncase $1 in\n start)\n if [ -d /sys/kernel/mm/transparent_hugepage ]; then\n thp_path=/sys/kernel/mm/transparent_hugepage\n elif [ -d /sys/kernel/mm/redhat_transparent_hugepage ]; then\n thp_path=/sys/kernel/mm/redhat_transparent_hugepage\n else\n return 0\n fi\n\n echo 'always' | tee ${thp_path}/enabled > /dev/null && echo defer+madvise | tee ${thp_path}/defrag > /dev/null && echo 0 | tee ${thp_path}/khugepaged/max_ptes_none > /dev/null && echo 1 | tee /proc/sys/vm/overcommit_memory > /dev/null'\n\n unset thp_path\n ;;\nesac","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-meta lg-highlight-prompt">#</span><span class="lg-highlight-bash">!</span><span class="lg-highlight-bash">/bin/bash</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-meta lg-highlight-prompt">#</span><span class="lg-highlight-comment lg-highlight-bash">## BEGIN INIT INFO</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-meta lg-highlight-prompt"># </span><span class="lg-highlight-bash">Provides: enable-transparent-hugepages</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-meta lg-highlight-prompt"># </span><span class="lg-highlight-bash">Required-Start: </span><span class="lg-highlight-variable lg-highlight-bash">$local_fs</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-meta lg-highlight-prompt"># </span><span class="lg-highlight-bash">Required-Stop:</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-meta lg-highlight-prompt"># </span><span class="lg-highlight-bash">X-Start-Before: mongod mongodb-mms-automation-agent</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-meta lg-highlight-prompt"># </span><span class="lg-highlight-bash">Default-Start: 2 3 4 5</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-meta lg-highlight-prompt"># </span><span class="lg-highlight-bash">Default-Stop: 0 1 6</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-meta lg-highlight-prompt"># </span><span class="lg-highlight-bash">Short-Description: Enable Linux Transparent Hugepages</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-meta lg-highlight-prompt"># </span><span class="lg-highlight-bash">Description: Enable Linux Transparent Hugepages, to improve</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-meta lg-highlight-prompt"># </span><span class="lg-highlight-bash"> database performance.</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-meta lg-highlight-prompt">#</span><span class="lg-highlight-comment lg-highlight-bash">## END INIT INFO</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">case $1 in</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> start)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> if [ -d /sys/kernel/mm/transparent_hugepage ]; then</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> thp_path=/sys/kernel/mm/transparent_hugepage</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> elif [ -d /sys/kernel/mm/redhat_transparent_hugepage ]; then</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> thp_path=/sys/kernel/mm/redhat_transparent_hugepage</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> else</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> return 0</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> fi</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> echo 'always' | tee ${thp_path}/enabled > /dev/null && echo defer+madvise | tee ${thp_path}/defrag > /dev/null && echo 0 | tee ${thp_path}/khugepaged/max_ptes_none > /dev/null && echo 1 | tee /proc/sys/vm/overcommit_memory > /dev/null'</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> unset thp_path</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ;;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">esac</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
2
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Make the script executable
<a class="headerlink leafygreen-ui-1kepx47" href="#make-the-script-executable" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="make-the-script-executable">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Run:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo chmod 755 /etc/init.d/enable-transparent-hugepages","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo chmod 755 /etc/init.d/enable-transparent-hugepages</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
3
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Run the script
<a class="headerlink leafygreen-ui-1kepx47" href="#run-the-script" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="run-the-script">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Run:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo /etc/init.d/enable-transparent-hugepages start","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo /etc/init.d/enable-transparent-hugepages start</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To verify that the relevant THP settings have changed, run the
following command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"cat /sys/kernel/mm/transparent_hugepage/enabled && cat /sys/kernel/mm/transparent_hugepage/defrag && cat /sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_none && cat /proc/sys/vm/overcommit_memory","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cat /sys/kernel/mm/transparent_hugepage/enabled && cat /sys/kernel/mm/transparent_hugepage/defrag && cat /sys/kernel/mm/transparent_hugepage/khugepaged/max_ptes_none && cat /proc/sys/vm/overcommit_memory</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
On Red Hat Enterprise Linux and potentially other Red Hat-based
derivatives, you may instead need to use the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"cat /sys/kernel/mm/redhat_transparent_hugepage/enabled","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cat /sys/kernel/mm/redhat_transparent_hugepage/enabled</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The output should resemble the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"always\ndefer+madvise\n0\n1","programmingLanguage":"Bash"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">always</td></tr><tr class=""><td class="leafygreen-ui-7razhx">defer+madvise</td></tr><tr class=""><td class="leafygreen-ui-7razhx">0</td></tr><tr class=""><td class="leafygreen-ui-7razhx">1</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
4
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Configure your operating system to run it on boot
<a class="headerlink leafygreen-ui-1kepx47" href="#configure-your-operating-system-to-run-it-on-boot" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="configure-your-operating-system-to-run-it-on-boot">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
To ensure that this setting is applied each time the operating sytem
starts, run the following command for your Linux distribution:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Distribution
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Command
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Ubuntu and Debian
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo update-rc.d enable-transparent-hugepages defaults","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo update-rc.d enable-transparent-hugepages defaults</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
SUSE
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo insserv /etc/init.d/enable-transparent-hugepages","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo insserv /etc/init.d/enable-transparent-hugepages</td></tr></tbody></table></code></pre>
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</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Red Hat, CentOS, Amazon Linux, and derivatives
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo chkconfig --add enable-transparent-hugepages","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo chkconfig --add enable-transparent-hugepages</td></tr></tbody></table></code></pre>
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</td>
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</tbody>
</table>
</div>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
5
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
(
<em>
Optional
</em>
) Customize tuned or ktune profile
<a class="headerlink leafygreen-ui-1kepx47" href="#-optional--customize-tuned-or-ktune-profile-1" title="Permalink to this heading">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-optional--customize-tuned-or-ktune-profile-1">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
If you are using
<code class="leafygreen-ui-1l06pbn">
tuned
</code>
or
<code class="leafygreen-ui-1l06pbn">
ktune
</code>
profiles on
<span class="leafygreen-ui-vm4wms" tabindex="0">
RHEL
</span>
/ CentOS, you must also create
a custom
<code class="leafygreen-ui-1l06pbn">
tuned
</code>
profile.
</p>
</section>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-enable-thp-configure-thp-tuned">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Using
<code class="leafygreen-ui-1l06pbn">
tuned
</code>
and
<code class="leafygreen-ui-1l06pbn">
ktune
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#using-tuned-and-ktune" title="Permalink to this heading">
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<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="using-tuned-and-ktune">
</div>
</a>
</h3>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If you use
<code class="leafygreen-ui-1l06pbn">
tuned
</code>
or
<code class="leafygreen-ui-1l06pbn">
ktune
</code>
, perform the steps in this section after
creating the service file.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
tuned
</code>
and
<code class="leafygreen-ui-1l06pbn">
ktune
</code>
are kernel tuning utilities that can affect
the Transparent Hugepages setting on your system. If you are using
<code class="leafygreen-ui-1l06pbn">
tuned
</code>
or
<code class="leafygreen-ui-1l06pbn">
ktune
</code>
on your
<span class="leafygreen-ui-vm4wms" tabindex="0">
RHEL
</span>
or CentOS system while running
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
, you must create a custom
<code class="leafygreen-ui-1l06pbn">
tuned
</code>
profile to ensure that THP stays enabled.
</p>
<div aria-hidden="true">
</div>
<div class="leafygreen-ui-1b75luy" data-lgid="lg-tabs">
<div class="leafygreen-ui-jp7pox" id="tabs-25">
<div aria-label="Tabs to describe usage of redhat-centos-6/redhat-centos-7" aria-orientation="horizontal" class="leafygreen-ui-m8p1vb lg-ui-tab-list-0000" data-lgid="lg-tabs-tab_list" role="tablist">
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<div class="leafygreen-ui-1nxuzmg">
Red Hat/CentOS 7 and 8
</div>
</button>
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<div class="leafygreen-ui-1nxuzmg">
Red Hat/CentOS 6
</div>
</button>
</div>
<div class="leafygreen-ui-ov1ktg">
<div class="leafygreen-ui-1sg2lsz">
</div>
</div>
</div>
<div class="lg-ui-tab-panels-0000" data-lgid="lg-tabs-tab_panels">
<div>
<div aria-labelledby="_r5rkfvg5j" class="" id="_d53r85xii" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"HowTo","steps":[{"@type":"HowToStep","text":"Create a new directory to store the custom tuned profile. The\nfollowing example inherits from the existing virtual-guest profile,\nand uses virtual-guest-thp as the new profile:","name":"Create a new profile"},{"@type":"HowToStep","text":"Create and edit /etc/tuned/virtual-guest-thp/tuned.conf. Add the\nfollowing text:This example inherits from the existing virtual-guest profile. Select\nthe appropriate profile for your system.","name":"Edit tuned.conf"},{"@type":"HowToStep","text":"Run:","name":"Enable the new profile"}],"name":"Using tuned and ktune - Red Hat/CentOS 7 and 8","image":"https://webimages.mongodb.com/_com_assets/cms/kuyj2focmkbxv7gh3-stacked_default_slate_blue.svg?auto=format%252Ccompress"}
</script>
<div class="css-4nyere eccljxs0">
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
1
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Create a new profile
<a class="headerlink leafygreen-ui-1kepx47" href="#create-a-new-profile" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="create-a-new-profile">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Create a new directory to store the custom
<code class="leafygreen-ui-1l06pbn">
tuned
</code>
profile. The
following example inherits from the existing
<code class="leafygreen-ui-1l06pbn">
virtual-guest
</code>
profile,
and uses
<code class="leafygreen-ui-1l06pbn">
virtual-guest-thp
</code>
as the new profile:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo mkdir /etc/tuned/virtual-guest-thp","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo mkdir /etc/tuned/virtual-guest-thp</td></tr></tbody></table></code></pre>
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
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</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
2
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Edit
<code class="leafygreen-ui-1l06pbn">
tuned.conf
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#edit-tuned.conf" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="edit-tuned.conf">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Create and edit
<code class="leafygreen-ui-1l06pbn">
/etc/tuned/virtual-guest-thp/tuned.conf
</code>
. Add the
following text:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[main]\ninclude=virtual-guest\n\n[vm]\ntransparent_hugepages=always","programmingLanguage":"Ini"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light ini leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-section">[main]</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-attr">include</span>=virtual-guest</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-section">[vm]</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-attr">transparent_hugepages</span>=always</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
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<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
This example inherits from the existing
<code class="leafygreen-ui-1l06pbn">
virtual-guest
</code>
profile. Select
the appropriate profile for your system.
</p>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
3
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Enable the new profile
<a class="headerlink leafygreen-ui-1kepx47" href="#enable-the-new-profile" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="enable-the-new-profile">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Run:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo tuned-adm profile virtual-guest-thp","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo tuned-adm profile virtual-guest-thp</td></tr></tbody></table></code></pre>
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</section>
</div>
</div>
</div>
</div>
</div>
</div>
<div>
<div aria-labelledby="_nt2m8y3q8" class="leafygreen-ui-38lglc" id="_19u4wwp4h" role="tabpanel">
<div class="leafygreen-ui-1kdmo88">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"HowTo","steps":[{"@type":"HowToStep","text":"To create a new profile from an existing profile, copy the relevant\ndirectory. The following example uses the virtual-guest profile as\nthe base, and uses virtual-guest-thp as the new profile:","name":"Create a new profile"},{"@type":"HowToStep","text":"Edit /etc/tune-profiles/virtual-guest-thp/ktune.sh and change the\nset_transparent_hugepages setting as follows:","name":"Edit ktune.sh"},{"@type":"HowToStep","text":"Enable the new profile:","name":"Enable the new profile"}],"name":"Using tuned and ktune - Red Hat/CentOS 6","image":"https://webimages.mongodb.com/_com_assets/cms/kuyj2focmkbxv7gh3-stacked_default_slate_blue.svg?auto=format%252Ccompress"}
</script>
<div class="css-4nyere eccljxs0">
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
1
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Create a new profile
<a class="headerlink leafygreen-ui-1kepx47" href="#create-a-new-profile-1" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="create-a-new-profile-1">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
To create a new profile from an existing profile, copy the relevant
directory. The following example uses the
<code class="leafygreen-ui-1l06pbn">
virtual-guest
</code>
profile as
the base, and uses
<code class="leafygreen-ui-1l06pbn">
virtual-guest-thp
</code>
as the new profile:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo cp -r /etc/tune-profiles/virtual-guest /etc/tune-profiles/virtual-guest-thp","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo cp -r /etc/tune-profiles/virtual-guest /etc/tune-profiles/virtual-guest-thp</td></tr></tbody></table></code></pre>
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</div>
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<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
2
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Edit
<code class="leafygreen-ui-1l06pbn">
ktune.sh
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#edit-ktune.sh" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="edit-ktune.sh">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Edit
<code class="leafygreen-ui-1l06pbn">
/etc/tune-profiles/virtual-guest-thp/ktune.sh
</code>
and change the
<code class="leafygreen-ui-1l06pbn">
set_transparent_hugepages
</code>
setting as follows:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"set_transparent_hugepages always"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">set_transparent_hugepages always</td></tr></tbody></table></code></pre>
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<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
3
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Enable the new profile
<a class="headerlink leafygreen-ui-1kepx47" href="#enable-the-new-profile-1" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="enable-the-new-profile-1">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Enable the new profile:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo tuned-adm profile virtual-guest-thp","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo tuned-adm profile virtual-guest-thp</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-tcmalloc-new-per-cpu-caches">
</span>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Enable Per-CPU Caches
<a class="headerlink leafygreen-ui-1kepx47" href="#enable-per-cpu-caches" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="enable-per-cpu-caches">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To verify that TCMalloc is running with per-CPU caches, ensure that:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/serverStatus/#mongodb-serverstatus-serverstatus.tcmalloc.usingPerCPUCaches">
<code class="leafygreen-ui-1l06pbn">
tcmalloc.usingPerCPUCaches
</code>
</a>
is
<code class="leafygreen-ui-1l06pbn">
true
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/serverStatus/#mongodb-serverstatus-serverstatus.tcmalloc.tcmalloc.cpu_free">
<code class="leafygreen-ui-1l06pbn">
tcmalloc.tcmalloc.cpu_free
</code>
</a>
is greater than
<code class="leafygreen-ui-1l06pbn">
0
</code>
.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
If per-CPU caches aren't enabled, ensure that:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You disable glibc rseq.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You're using Linux kernel version 4.18 or later.
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-tcmalloc-disable-glibc-rseq">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Disable glibc rseq
<a class="headerlink leafygreen-ui-1kepx47" href="#disable-glibc-rseq" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="disable-glibc-rseq">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The new TCMalloc requires
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://github.com/google/tcmalloc/blob/master/docs/design.md#restartable-sequences-and-per-cpu-tcmalloc" rel="noopener noreferrer">
<span>
Restartable Sequences (rseq)
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
to implement per-CPU caches. If another application, such as the
glibc library, registers an rseq structure before TCMalloc,
TCMalloc can't use rseq. Without rseq, TCMalloc uses per-thread caches, which
are used by the legacy TCMalloc version.
</p>
<p class="leafygreen-ui-1kp3ins">
To ensure that TCMalloc can use rseq to enable per-CPU caches, you can
disable glibc’s registration of a rseq structure. To disable glibc rseq, set
the following environment variable before you start
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"GLIBC_TUNABLES=glibc.pthread.rseq=0\nexport GLIBC_TUNABLES","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">GLIBC_TUNABLES=glibc.pthread.rseq=0</td></tr><tr class=""><td class="leafygreen-ui-7razhx">export GLIBC_TUNABLES</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-tcmalloc-kernel-version">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Check Kernel Version
<a class="headerlink leafygreen-ui-1kepx47" href="#check-kernel-version" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="check-kernel-version">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If you disabled glibc rseq and per-CPU caches are still not enabled,
ensure that you're using Linux kernel version 4.18 or later. To check your
kernel version, run the following command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"uname -r","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">uname -r</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Learn More
<a class="headerlink leafygreen-ui-1kepx47" href="#learn-more" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="learn-more">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/8.0/#std-label-8.0-tcmalloc-upgrade">
Upgraded TCMalloc
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://google.github.io/tcmalloc/tuning.html" rel="noopener noreferrer">
<span>
Google's TCMalloc Tuning Guide
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/serverStatus/#std-label-server-status-tcmalloc">
tcmalloc serverStatus metrics
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/aggregation/log/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$log (aggregation)
<a class="headerlink leafygreen-ui-1kepx47" href="#-log--aggregation-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-log--aggregation-">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="expression">
<dt>
<code class="leafygreen-ui-1l06pbn">
$log
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-expression-exp.-log" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-expression-exp.-log">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Calculates the log of a number in the specified base and returns the
result as a double.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-log" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$log
</code>
</span>
</a>
has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $log: [ <number>, <base /> ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$log</span>: <!-- -->[ <<!-- -->number<!-- -->><!-- -->,<!-- --> <!-- --><<!-- -->base<!-- -->> <!-- -->] }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
<number>
</code>
expression can be any valid
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
as long as it resolves to a non-negative number.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
<base>
</code>
expression can be any valid
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
as long as it resolves to a positive
number greater than
<code class="leafygreen-ui-1l06pbn">
1
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
For more information on expressions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
Expression Operators
<!-- -->
.
</a>
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The default return type is a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-Double">
<code class="leafygreen-ui-1l06pbn">
double
</code>
</a>
. If at least
one operand is a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-Decimal128">
<code class="leafygreen-ui-1l06pbn">
decimal
</code>
</a>
, then the return
type is a decimal.
</p>
<p class="leafygreen-ui-1kp3ins">
If either argument resolves to a value of
<code class="leafygreen-ui-1l06pbn">
null
</code>
or refers to a field that is
missing,
<code class="leafygreen-ui-1l06pbn">
$log
</code>
returns
<code class="leafygreen-ui-1l06pbn">
null
</code>
. If either argument resolves to
<code class="leafygreen-ui-1l06pbn">
NaN
</code>
,
<code class="leafygreen-ui-1l06pbn">
$log
</code>
returns
<code class="leafygreen-ui-1l06pbn">
NaN
</code>
.
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:85%"/>
<col style="width:15%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Example
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Results
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $log: [ 100, 10 ] }
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
2
</code>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
{ $log: [ 100, Math.E ] }
</code>
where
<code class="leafygreen-ui-1l06pbn">
Math.E
</code>
is a JavaScript
representation for
<em>
e
</em>
.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
4.605170185988092
</code>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
A collection
<code class="leafygreen-ui-1l06pbn">
integers
</code>
contains the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.integers.insertMany( [\n { _id: 1, int: 5 },\n { _id: 2, int: 2 },\n { _id: 3, int: 23 },\n { _id: 4, int: 10 }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">integers</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">int</span>: <span class="lg-highlight-number">5</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">int</span>: <span class="lg-highlight-number">2</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">int</span>: <span class="lg-highlight-number">23</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-attr">int</span>: <span class="lg-highlight-number">10</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following example uses log
<sub>
2
</sub>
in its calculation to
determine the number of bits required to represent the value of
<code class="leafygreen-ui-1l06pbn">
int
</code>
.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.integers.aggregate([\n { $project: { bitsNeeded:\n {\n $floor: { $add: [ 1, { $log: [ \"$int\", 2 ] } ] } } }\n }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">integers</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$project</span>: <!-- -->{ <span class="lg-highlight-attr">bitsNeeded</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$floor</span>: <!-- -->{ <span class="lg-highlight-attr">$add</span>: <!-- -->[ <span class="lg-highlight-number">1</span>, <!-- -->{ <span class="lg-highlight-attr">$log</span>: <!-- -->[ <span class="lg-highlight-string">"$int"</span>, <span class="lg-highlight-number">2</span> ] } ] } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following results:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"bitsNeeded\" : 3 }\n{ \"_id\" : 2, \"bitsNeeded\" : 2 }\n{ \"_id\" : 3, \"bitsNeeded\" : 5 }\n{ \"_id\" : 4, \"bitsNeeded\" : 4 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"bitsNeeded"</span> <!-- -->: <span class="lg-highlight-number">3</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"bitsNeeded"</span> <!-- -->: <span class="lg-highlight-number">2</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"bitsNeeded"</span> <!-- -->: <span class="lg-highlight-number">5</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"bitsNeeded"</span> <!-- -->: <span class="lg-highlight-number">4</span> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/log10/#mongodb-expression-exp.-log10">
<code class="leafygreen-ui-1l06pbn">
$log10
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/ln/#mongodb-expression-exp.-ln">
<code class="leafygreen-ui-1l06pbn">
$ln
</code>
</a>
</p>
</li>
</ul>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/cursor.readConcern/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
cursor.readConcern()
<a class="headerlink leafygreen-ui-1kepx47" href="#cursor.readconcern--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="cursor.readconcern--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#considerations" target="_self">
<span>
Considerations
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
cursor.readConcern(level)
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-cursor.readConcern" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-cursor.readConcern">
</div>
</a>
</dt>
<dd>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
mongosh Method
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This page documents a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
method. This is
<em>
not
</em>
the documentation for a language-specific driver, such as Node.js.
</p>
<p class="leafygreen-ui-1kp3ins">
For MongoDB API drivers, refer to the language-specific
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
MongoDB driver documentation
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-read-concern">
read concern
</a>
for the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
db.collection.find()
</code>
</a>
method.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.readConcern" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
readConcern()
</code>
</span>
</a>
method has the following form:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.collection.find().readConcern(<level>)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">collection</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->).<span class="lg-highlight-title lg-highlight-function">readConcern</span>(<<!-- -->level<!-- -->><!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.readConcern" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
readConcern()
</code>
</span>
</a>
method has the following
parameter:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Parameter
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
level
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-read-concern">
Read concern
</a>
level.
</p>
<p class="leafygreen-ui-1kp3ins">
Possible read concern levels are:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-local/#mongodb-readconcern-readconcern.-local-">
<code class="leafygreen-ui-1l06pbn">
"local"
</code>
</a>
. This is the default read concern level for
read operations against the primary and secondaries.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-available/#mongodb-readconcern-readconcern.-available-">
<code class="leafygreen-ui-1l06pbn">
"available"
</code>
</a>
. Available for read operations against
the primary and secondaries.
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-available/#mongodb-readconcern-readconcern.-available-">
<code class="leafygreen-ui-1l06pbn">
"available"
</code>
</a>
behaves the
same as
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-local/#mongodb-readconcern-readconcern.-local-">
<code class="leafygreen-ui-1l06pbn">
"local"
</code>
</a>
against the primary and non-sharded
secondaries. The query returns the instance's most recent data.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-majority/#mongodb-readconcern-readconcern.-majority-">
<code class="leafygreen-ui-1l06pbn">
"majority"
</code>
</a>
. Available for replica sets that use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/wiredtiger/#std-label-storage-wiredtiger">
WiredTiger storage engine
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-linearizable/#mongodb-readconcern-readconcern.-linearizable-">
<code class="leafygreen-ui-1l06pbn">
"linearizable"
</code>
</a>
. Available for read operations on the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-states/#mongodb-replstate-replstate.PRIMARY">
<code class="leafygreen-ui-1l06pbn">
primary
</code>
</a>
only.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For more formation on the read concern levels, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern/#std-label-read-concern-levels">
Read Concern Levels
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Considerations
<a class="headerlink leafygreen-ui-1kepx47" href="#considerations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="considerations">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Read Your Own Writes
<a class="headerlink leafygreen-ui-1kepx47" href="#read-your-own-writes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="read-your-own-writes">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
You can use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/read-isolation-consistency-recency/#std-label-sessions">
causally consistent sessions
</a>
to read your own
writes, if the writes request acknowledgment.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Linearizable Read Concern Performance
<a class="headerlink leafygreen-ui-1kepx47" href="#linearizable-read-concern-performance" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="linearizable-read-concern-performance">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
When specifying
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-linearizable/#mongodb-readconcern-readconcern.-linearizable-">
<code class="leafygreen-ui-1l06pbn">
linearizable read concern
</code>
</a>
, always use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.maxTimeMS/#mongodb-method-cursor.maxTimeMS">
<code class="leafygreen-ui-1l06pbn">
maxTimeMS()
</code>
</a>
in case
a majority of data bearing members are unavailable.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.restaurants.find( { _id: 5 } ).readConcern(\"linearizable\").maxTimeMS(10000)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">restaurants</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">5</span> } ).<span class="lg-highlight-title lg-highlight-function">readConcern</span>(<span class="lg-highlight-string">"linearizable"</span>).<span class="lg-highlight-title lg-highlight-function">maxTimeMS</span>(<span class="lg-highlight-number">10000</span>)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
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</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern/">
Read Concern
</a>
</p>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/command/getClusterParameter/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
getClusterParameter
<a class="headerlink leafygreen-ui-1kepx47" href="#getclusterparameter" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="getclusterparameter">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#command-fields" target="_self">
<span>
Command Fields
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="dbcommand">
<dt>
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-dbcommand-dbcmd.getClusterParameter" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-dbcommand-dbcmd.getClusterParameter">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.getClusterParameter" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
</span>
</a>
is an administrative command for
retrieving the values of
<strong>
cluster parameters
</strong>
. Cluster parameters
are configurable parameters that affect all nodes in a sharded cluster.
</p>
<p class="leafygreen-ui-1kp3ins">
To run
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
, use the
<code class="leafygreen-ui-1l06pbn">
db.adminCommand( { command } )
</code>
method.
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This command is available in deployments hosted in the following environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This command is supported in all MongoDB Atlas clusters.
For information on Atlas support for all commands, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/" target="_self">
<span>
Unsupported Commands
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The command has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.adminCommand(\n {\n getClusterParameter: <parameter> | [<parameter>, <parameter>] | \"'*'\"\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">getClusterParameter</span>: <<!-- -->parameter<!-- -->> <!-- -->| <!-- -->[<<!-- -->parameter<!-- -->><!-- -->,<!-- --> <!-- --><<!-- -->parameter<!-- -->><!-- -->] <!-- -->| <span class="lg-highlight-string">"'*'"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Command Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#command-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="command-fields">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The command takes the following fields:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
<parameter>
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
String or array of strings
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
You can specify one of the following:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The name of the parameter you want to retrieve.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
An array with the names of multiple parameters.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
'*'
</code>
, to return values for all parameters available to
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
.
</p>
</li>
</ul>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You can only run
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
on the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database. If
you run the command on any other database, MongoDB returns an error.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You can run
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
on any node in a replica set or
sharded cluster.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
When you run
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
,
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
returns cached parameter values.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
When you run
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
,
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
returns the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-durable">
durable
</a>
value of the
cluster parameter from the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharded-cluster-config-servers/#std-label-sharding-config-server">
config server
<!-- -->
.
</a>
</p>
</li>
</ul>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Access Control
<a class="headerlink leafygreen-ui-1kepx47" href="#access-control" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="access-control">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
When
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/authentication/#std-label-authentication">
authentication
</a>
is enabled,
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
only works when authenticated as a user with a role that has access to the
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
action.
</p>
<p class="leafygreen-ui-1kp3ins">
MongoDB Atlas users must have the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/mongodb-users-roles-and-privileges/#mongodb-atlasrole-atlasAdmin" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
atlasAdmin
</code>
</span>
</a>
role.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The output of the following examples may vary depending on the specific
configuration of the running MongoDB deployment.
</p>
</div>
</div>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Retrieve Single Cluster Parameter
<a class="headerlink leafygreen-ui-1kepx47" href="#retrieve-single-cluster-parameter" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="retrieve-single-cluster-parameter">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following operation runs
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
on the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database using a value of
<code class="leafygreen-ui-1l06pbn">
hostName
</code>
to retrieve the value for
a hypothetical cluster parameter named
<code class="leafygreen-ui-1l06pbn">
hostName
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"use admin\ndb.adminCommand( { getClusterParameter : \"hostName\" } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">use admin</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>( <!-- -->{ <!-- -->getClusterParameter <!-- -->: <span class="lg-highlight-string">"hostName"</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Retrieve Multiple Cluster Parameters
<a class="headerlink leafygreen-ui-1kepx47" href="#retrieve-multiple-cluster-parameters" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="retrieve-multiple-cluster-parameters">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following operation runs
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
on the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database using the values
<code class="leafygreen-ui-1l06pbn">
hostName
</code>
and
<code class="leafygreen-ui-1l06pbn">
testParameter
</code>
to retrieve the
values for hypothetical cluster parameters named
<code class="leafygreen-ui-1l06pbn">
hostName
</code>
and
<code class="leafygreen-ui-1l06pbn">
testParameter
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"use admin\ndb.adminCommand( { getClusterParameter: [ \"hostName\", \"testParameter\" ] } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">use admin</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>( <!-- -->{ <span class="lg-highlight-attr">getClusterParameter</span>: <!-- -->[ <span class="lg-highlight-string">"hostName"</span>, <span class="lg-highlight-string">"testParameter"</span> ] } )</td></tr></tbody></table></code></pre>
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Retrieve All Cluster Parameters
<a class="headerlink leafygreen-ui-1kepx47" href="#retrieve-all-cluster-parameters" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="retrieve-all-cluster-parameters">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following operation runs
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
with a value of
<code class="leafygreen-ui-1l06pbn">
'*'
</code>
to retrieve the values from all cluster parameters:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"use admin\ndb.adminCommand( { getClusterParameter : '*' } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">use admin</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>( <!-- -->{ <!-- -->getClusterParameter <!-- -->: <span class="lg-highlight-string">'*'</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/setClusterParameter/#mongodb-dbcommand-dbcmd.setClusterParameter">
<code class="leafygreen-ui-1l06pbn">
setClusterParameter
</code>
</a>
for more about these parameters.
</p>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/sp.process/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
sp.process()
<a class="headerlink leafygreen-ui-1kepx47" href="#sp.process--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sp.process--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#command-fields" target="_self">
<span>
Command Fields
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#access-control" target="_self">
<span>
Access Control
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#learn-more" target="_self">
<span>
Learn More
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
sp.process()
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-sp.process" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-sp.process">
</div>
</a>
</dt>
<dd>
</dd>
</dl>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
7.0
</em>
:
<!-- -->
Creates an ephemeral
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/atlas-sp/overview/#mongodb-expression-exp.Stream-Processor" target="_self">
<span>
Stream Processor
</span>
</a>
on
the current
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/atlas-sp/overview/#mongodb-expression-exp.Stream-Processing-Instance" target="_self">
<span>
Stream Processing Instance
<!-- -->
.
</span>
</a>
</p>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-sp.process" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
sp.process()
</code>
</span>
</a>
method has the following
syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sp.process(\n [\n <pipeline>\n ],\n {\n <options>\n }\n)","programmingLanguage":"JSON"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light json leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sp.process(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">[</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <pipeline></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">]</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <options></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
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</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Command Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#command-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="command-fields">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
sp.createStreamProcessor()
</code>
takes these fields:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:40%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Necessity
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
name
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Required
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Logical name for the stream processor. This must be unique
within the stream processing instance.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
pipeline
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Required
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/atlas-stream-processing/stream-aggregation/#std-label-stream-aggregation" target="_self">
<span>
Stream aggregation pipeline
</span>
</a>
you
want to apply to your streaming data.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
options
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
object
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Optional
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Object defining various optional settings for your stream
processor.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
options.dlq
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
object
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Conditional
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Object assigning a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/reference/glossary/#std-term-dead-letter-queue" target="_self">
<span>
dead letter queue
</span>
</a>
for your stream processing instance.
This field is necessary if you define the
<code class="leafygreen-ui-1l06pbn">
options
</code>
field.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
options.dlq.connectionName
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Conditional
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Label that identifies a connection in your
connection registry. This connection must reference an
Atlas cluster. This field is necessary if you define the
<code class="leafygreen-ui-1l06pbn">
options.dlq
</code>
field.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
options.dlq.db
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Conditional
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Name of an Atlas database on the cluster specified
in
<code class="leafygreen-ui-1l06pbn">
options.dlq.connectionName
</code>
. This field is necessary if
you define the
<code class="leafygreen-ui-1l06pbn">
options.dlq
</code>
field.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
options.dlq.coll
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Conditional
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Name of a collection in the database specified in
<code class="leafygreen-ui-1l06pbn">
options.dlq.db
</code>
. This field is necessary if you
define the
<code class="leafygreen-ui-1l06pbn">
options.dlq
</code>
field.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
sp.process()
</code>
creates an ephemeral, unnamed stream
processor on the current stream processing instance and immediately
initializes it. This stream processor only persists as long as it
runs. If you terminate an ephemeral stream processor, you must create
it again in order to use it.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Access Control
<a class="headerlink leafygreen-ui-1kepx47" href="#access-control" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="access-control">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The user running
<code class="leafygreen-ui-1l06pbn">
sp.process()
</code>
must have the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/mongodb-users-roles-and-privileges/#mongodb-atlasrole-atlasAdmin" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
atlasAdmin
</code>
</span>
</a>
role.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following example creates an ephemeral stream processor
which ingests data from the
<code class="leafygreen-ui-1l06pbn">
sample_stream_solar
</code>
connection. The
processor excludes all documents where the value of the
<code class="leafygreen-ui-1l06pbn">
device_id
</code>
field is
<code class="leafygreen-ui-1l06pbn">
device_8
</code>
, passing the rest to a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/atlas-sp/overview/#tumbling-windows" target="_self">
<span>
tumbling window
</span>
</a>
with a 10-second
duration. Each window groups the documents it receives, then returns
various useful statistics of each group. The stream processor then
merges these records to
<code class="leafygreen-ui-1l06pbn">
solar_db.solar_coll
</code>
over the
<code class="leafygreen-ui-1l06pbn">
mongodb1
</code>
connection.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sp.process(\n [\n {\n $source: {\n connectionName: 'sample_stream_solar',\n timeField: {\n $dateFromString: {\n dateString: '$timestamp'\n }\n }\n }\n },\n {\n $match: {\n $expr: {\n $ne: [\n \"$device_id\",\n \"device_8\"\n ]\n }\n }\n },\n {\n $tumblingWindow: {\n interval: {\n size: NumberInt(10),\n unit: \"second\"\n },\n \"pipeline\": [\n {\n $group: {\n \"_id\": { \"device_id\": \"$device_id\" },\n \"max_temp\": { $max: \"$obs.temp\" },\n \"max_watts\": { $max: \"$obs.watts\" },\n \"min_watts\": { $min: \"$obs.watts\" },\n \"avg_watts\": { $avg: \"$obs.watts\" },\n \"median_watts\": {\n $median: {\n input: \"$obs.watts\",\n method: \"approximate\"\n }\n }\n }\n }\n ]\n }\n },\n {\n $merge: {\n into: {\n connectionName: \"mongodb1\",\n db: \"solar_db\",\n coll: \"solar_coll\"\n },\n on: [\"_id\"]\n }\n }\n ]\n)","programmingLanguage":"JSON"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light json leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sp.process(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">[</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $source<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> connectionName<span class="lg-highlight-punctuation">:</span> 'sample_stream_solar'<span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> timeField<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $dateFromString<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> dateString<span class="lg-highlight-punctuation">:</span> '$timestamp'</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $match<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $expr<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $ne<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">[</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"$device_id"</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"device_8"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">]</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $tumblingWindow<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> interval<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> size<span class="lg-highlight-punctuation">:</span> NumberInt(<span class="lg-highlight-number">10</span>)<span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> unit<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"second"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"pipeline"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">[</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $group<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"_id"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span> <span class="lg-highlight-attr">"device_id"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"$device_id"</span> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"max_temp"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span> $max<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"$obs.temp"</span> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"max_watts"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span> $max<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"$obs.watts"</span> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"min_watts"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span> $min<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"$obs.watts"</span> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"avg_watts"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span> $avg<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"$obs.watts"</span> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"median_watts"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $median<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> input<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"$obs.watts"</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> method<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"approximate"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">]</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $merge<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> into<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> connectionName<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"mongodb1"</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"solar_db"</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> coll<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"solar_coll"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> on<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">[</span><span class="lg-highlight-string">"_id"</span><span class="lg-highlight-punctuation">]</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">]</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
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<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Learn More
<a class="headerlink leafygreen-ui-1kepx47" href="#learn-more" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
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<div class="css-1btu0w3 evvkmar0" id="learn-more">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/atlas-sp/stream-aggregation/" target="_self">
<span>
Stream Aggregation
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/atlas-sp/manage-stream-processor/" target="_self">
<span>
Manage Stream Processors
</span>
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/Bulk.execute/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Bulk.execute()
<a class="headerlink leafygreen-ui-1kepx47" href="#bulk.execute--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="bulk.execute--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#description" target="_self">
<span>
Description
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
MongoDB also provides
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.bulkWrite/#mongodb-method-db.collection.bulkWrite">
<code class="leafygreen-ui-1l06pbn">
db.collection.bulkWrite()
</code>
</a>
for
performing bulk write operations.
</p>
</div>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Description
<a class="headerlink leafygreen-ui-1kepx47" href="#description" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="description">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
Bulk.execute()
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-Bulk.execute" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-Bulk.execute">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Executes the list of operations built by the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk/#mongodb-method-Bulk">
<code class="leafygreen-ui-1l06pbn">
Bulk()
</code>
</a>
operations builder.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-Bulk.execute" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
Bulk.execute()
</code>
</span>
</a>
accepts the following parameter:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Parameter
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
writeConcern
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional.
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#std-label-write-concern">
write concern
</a>
document for the bulk operation as a whole. Omit to use
default. For a standalone
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
server, the
write concern defaults to
<code class="leafygreen-ui-1l06pbn">
{ w: majority }
</code>
. With a replica
set, the default write concern is
<code class="leafygreen-ui-1l06pbn">
{ w: majority }
</code>
unless
modified as part of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/replica-set-write-concern/#std-label-repl-set-modify-default-write-concern">
replica set configuration
</a>
, or potentially if
the replica set contains
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#std-label-wc-default-behavior">
multiple arbiters
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-bulk-execute-ex-write-concern" target="_self">
<span>
Override Default Write Concern
</span>
</a>
for an example.
</p>
<p class="leafygreen-ui-1kp3ins">
Do not explicitly set the write concern for the operation if run in
a transaction. To use write concern with transactions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions-write-concern">
Transactions and Write Concern
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<table class="css-11h39yh e1nex8bq0">
<colgroup>
<col class="field-name"/>
<col class="field-body"/>
</colgroup>
<tbody>
<tr class="css-x8snli">
<th>
Returns
<!-- -->
:
</th>
<td>
A
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/BulkWriteResult/#mongodb-method-BulkWriteResult">
<code class="leafygreen-ui-1l06pbn">
BulkWriteResult()
</code>
</a>
object that contains the
status of the operation.
</td>
</tr>
</tbody>
</table>
<p class="leafygreen-ui-1kp3ins">
After execution, you cannot re-execute the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk/#mongodb-method-Bulk">
<code class="leafygreen-ui-1l06pbn">
Bulk()
</code>
</a>
object without reinitializing. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.initializeUnorderedBulkOp/#mongodb-method-db.collection.initializeUnorderedBulkOp">
<code class="leafygreen-ui-1l06pbn">
db.collection.initializeUnorderedBulkOp()
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.initializeOrderedBulkOp/#mongodb-method-db.collection.initializeOrderedBulkOp">
<code class="leafygreen-ui-1l06pbn">
db.collection.initializeOrderedBulkOp()
</code>
.
</a>
</p>
</dd>
</dl>
<span class="leafygreen-ui-1qnjd6d" id="std-label-bulk-execute-behavior">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Ordered Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#ordered-operations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="ordered-operations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
When executing an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.initializeOrderedBulkOp/#mongodb-method-db.collection.initializeOrderedBulkOp">
<code class="leafygreen-ui-1l06pbn">
ordered
</code>
</a>
list of operations, MongoDB
groups the operations by the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk.getOperations/#mongodb-data-batchType">
<code class="leafygreen-ui-1l06pbn">
operation type
</code>
</a>
and
contiguity; i.e.
<em>
contiguous
</em>
operations of the same type are grouped
together. For example, if an ordered list has two insert operations
followed by an update operation followed by another insert operation,
MongoDB groups the operations into three separate groups: first group
contains the two insert operations, second group contains the update
operation, and the third group contains the last insert operation. This
behavior is subject to change in future versions.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk/#mongodb-method-Bulk">
<code class="leafygreen-ui-1l06pbn">
Bulk()
</code>
</a>
operations in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
and comparable
methods in the drivers do not have a limit for the number of operations
in a group. To see how the operations are grouped for bulk operation
execution, call
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk.getOperations/#mongodb-method-Bulk.getOperations">
<code class="leafygreen-ui-1l06pbn">
Bulk.getOperations()
</code>
</a>
<em>
after
</em>
the execution.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/limits/#mongodb-limit-Write-Command-Batch-Limit-Size">
Write Command Batch Limit Size
</a>
</p>
</li>
</ul>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Executing an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.initializeOrderedBulkOp/#mongodb-method-db.collection.initializeOrderedBulkOp">
<code class="leafygreen-ui-1l06pbn">
ordered
</code>
</a>
list of operations on a
sharded collection will generally be slower than executing an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.initializeUnorderedBulkOp/#mongodb-method-db.collection.initializeUnorderedBulkOp">
<code class="leafygreen-ui-1l06pbn">
unordered
</code>
</a>
list
since with an ordered list, each operation must wait for the previous
operation to finish.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Unordered Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#unordered-operations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="unordered-operations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
When executing an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.initializeUnorderedBulkOp/#mongodb-method-db.collection.initializeUnorderedBulkOp">
<code class="leafygreen-ui-1l06pbn">
unordered
</code>
</a>
list of operations,
MongoDB groups the operations. With an unordered bulk operation, the
operations in the list may be reordered to increase performance. As
such, applications should not depend on the ordering when performing
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.initializeUnorderedBulkOp/#mongodb-method-db.collection.initializeUnorderedBulkOp">
<code class="leafygreen-ui-1l06pbn">
unordered
</code>
</a>
bulk
operations.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk/#mongodb-method-Bulk">
<code class="leafygreen-ui-1l06pbn">
Bulk()
</code>
</a>
operations in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
and comparable
methods in the drivers do not have a limit for the number of operations
in a group. To see how the operations are grouped for bulk operation
execution, call
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk.getOperations/#mongodb-method-Bulk.getOperations">
<code class="leafygreen-ui-1l06pbn">
Bulk.getOperations()
</code>
</a>
<em>
after
</em>
the execution.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/limits/#mongodb-limit-Write-Command-Batch-Limit-Size">
Write Command Batch Limit Size
</a>
</p>
</li>
</ul>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Transactions
<a class="headerlink leafygreen-ui-1kepx47" href="#transactions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="transactions">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk/#mongodb-method-Bulk">
<code class="leafygreen-ui-1l06pbn">
Bulk()
</code>
</a>
can be used inside
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions">
distributed transactions
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
For
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk.insert/#mongodb-method-Bulk.insert">
<code class="leafygreen-ui-1l06pbn">
Bulk.insert()
</code>
</a>
operations, the collection must already exist.
</p>
<p class="leafygreen-ui-1kp3ins">
For
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk.find.upsert/#mongodb-method-Bulk.find.upsert">
<code class="leafygreen-ui-1l06pbn">
Bulk.find.upsert()
</code>
</a>
, if the operation results in an
upsert, the collection must already exist.
</p>
<p class="leafygreen-ui-1kp3ins">
Do not explicitly set the write concern for the operation if run in
a transaction. To use write concern with transactions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions-write-concern">
Transactions and Write Concern
<!-- -->
.
</a>
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
In most cases, a distributed transaction incurs a greater
performance cost over single document writes, and the
availability of distributed transactions should not be a
replacement for effective schema design. For many scenarios, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/data-modeling/concepts/embedding-vs-references/#std-label-data-modeling-embedding">
denormalized data model (embedded documents and arrays)
</a>
will continue to be optimal for your
data and use cases. That is, for many scenarios, modeling your data
appropriately will minimize the need for distributed
transactions.
</p>
<p class="leafygreen-ui-1kp3ins">
For additional transactions usage considerations
(such as runtime limit and oplog size limit), see also
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions-production-consideration/#std-label-production-considerations">
Production Considerations
<!-- -->
.
</a>
</p>
</div>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Execute Bulk Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#execute-bulk-operations" title="Permalink to this heading">
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<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="execute-bulk-operations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following initializes a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk/#mongodb-method-Bulk">
<code class="leafygreen-ui-1l06pbn">
Bulk()
</code>
</a>
operations builder on the
<code class="leafygreen-ui-1l06pbn">
items
</code>
collection, adds a series of insert operations, and executes
the operations:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"var bulk = db.items.initializeUnorderedBulkOp();\nbulk.insert( { item: \"abc123\", status: \"A\", defaultQty: 500, points: 5 } );\nbulk.insert( { item: \"ijk123\", status: \"A\", defaultQty: 100, points: 10 } );\nbulk.execute( );","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> bulk <!-- -->= <!-- -->db.<span class="lg-highlight-property">items</span>.<span class="lg-highlight-title lg-highlight-function">initializeUnorderedBulkOp</span>(<!-- -->)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bulk.<span class="lg-highlight-title lg-highlight-function">insert</span>( <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"abc123"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-attr">defaultQty</span>: <span class="lg-highlight-number">500</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">5</span> } )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bulk.<span class="lg-highlight-title lg-highlight-function">insert</span>( <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"ijk123"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-attr">defaultQty</span>: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">10</span> } )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bulk.<span class="lg-highlight-title lg-highlight-function">execute</span>( <!-- -->)<!-- -->;</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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</div>
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</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/BulkWriteResult/#mongodb-method-BulkWriteResult">
<code class="leafygreen-ui-1l06pbn">
BulkWriteResult()
</code>
</a>
object:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"BulkWriteResult({\n acknowledged: true,\n insertedCount: 2,\n insertedIds: {\n '0': ObjectId(\"64e61e3b84ff8808cd43a92c\"),\n '1': ObjectId(\"64e61e3b84ff8808cd43a92d\")\n },\n matchedCount: 0,\n modifiedCount: 0,\n deletedCount: 0,\n upsertedCount: 0,\n upsertedIds: {}\n})","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">BulkWriteResult</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">acknowledged</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">insertedCount</span>: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">insertedIds</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'0'</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"64e61e3b84ff8808cd43a92c"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'1'</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"64e61e3b84ff8808cd43a92d"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">matchedCount</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">modifiedCount</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">deletedCount</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">upsertedCount</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">upsertedIds</span>: <!-- -->{<!-- -->}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">})</td></tr></tbody></table></code></pre>
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</svg>
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</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For details on the return object, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/BulkWriteResult/#mongodb-method-BulkWriteResult">
<code class="leafygreen-ui-1l06pbn">
BulkWriteResult()
</code>
</a>
. For
details on the batches executed, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk.getOperations/#mongodb-method-Bulk.getOperations">
<code class="leafygreen-ui-1l06pbn">
Bulk.getOperations()
</code>
.
</a>
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-bulk-execute-ex-write-concern">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Override Default Write Concern
<a class="headerlink leafygreen-ui-1kepx47" href="#override-default-write-concern" title="Permalink to this heading">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="override-default-write-concern">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following operation to a replica set specifies a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#std-label-write-concern">
write
concern
</a>
of
<code class="leafygreen-ui-1l06pbn">
"w: 1"
</code>
with a
<code class="leafygreen-ui-1l06pbn">
wtimeout
</code>
of 5000
milliseconds such that the method returns after the writes propagate
to a majority of the voting replica set members or the method times out
after five seconds.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"var bulk = db.items.initializeUnorderedBulkOp();\nbulk.insert( { item: \"efg123\", status: \"A\", defaultQty: 100, points: 0 } );\nbulk.insert( { item: \"xyz123\", status: \"A\", defaultQty: 100, points: 0 } );\nbulk.execute( { w: 1, wtimeout: 5000 } );","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> bulk <!-- -->= <!-- -->db.<span class="lg-highlight-property">items</span>.<span class="lg-highlight-title lg-highlight-function">initializeUnorderedBulkOp</span>(<!-- -->)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bulk.<span class="lg-highlight-title lg-highlight-function">insert</span>( <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"efg123"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-attr">defaultQty</span>: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">0</span> } )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bulk.<span class="lg-highlight-title lg-highlight-function">insert</span>( <!-- -->{ <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"xyz123"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-attr">defaultQty</span>: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">0</span> } )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bulk.<span class="lg-highlight-title lg-highlight-function">execute</span>( <!-- -->{ <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">wtimeout</span>: <span class="lg-highlight-number">5000</span> } )<!-- -->;</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/BulkWriteResult/#mongodb-method-BulkWriteResult">
<code class="leafygreen-ui-1l06pbn">
BulkWriteResult()
</code>
</a>
object:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"BulkWriteResult({\n acknowledged: true,\n insertedCount: 2,\n insertedIds: {\n '0': ObjectId(\"64e61e3b84ff8808cd43a92c\"),\n '1': ObjectId(\"64e61e3b84ff8808cd43a92d\")\n },\n matchedCount: 0,\n modifiedCount: 0,\n deletedCount: 0,\n upsertedCount: 0,\n upsertedIds: {}\n})","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">BulkWriteResult</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">acknowledged</span>: <span class="lg-highlight-literal">true</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">insertedCount</span>: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">insertedIds</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'0'</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"64e61e3b84ff8808cd43a92c"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'1'</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"64e61e3b84ff8808cd43a92d"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">matchedCount</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">modifiedCount</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">deletedCount</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">upsertedCount</span>: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">upsertedIds</span>: <!-- -->{<!-- -->}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">})</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk/#mongodb-method-Bulk">
<code class="leafygreen-ui-1l06pbn">
Bulk()
</code>
</a>
for a listing of methods available for bulk
operations.
</p>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/aggregation/sortByCount/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$sortByCount (aggregation)
<a class="headerlink leafygreen-ui-1kepx47" href="#-sortbycount--aggregation-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-sortbycount--aggregation-">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#considerations" target="_self">
<span>
Considerations
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="pipeline">
<dt>
<code class="leafygreen-ui-1l06pbn">
$sortByCount
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-pipeline-pipe.-sortByCount" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-pipeline-pipe.-sortByCount">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Groups incoming documents based on the value of a specified
expression, then computes the count of documents in each distinct
group.
</p>
<p class="leafygreen-ui-1kp3ins">
Each output document contains two fields: an
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field
containing the distinct grouping value, and a
<code class="leafygreen-ui-1l06pbn">
count
</code>
field
containing the number of documents belonging to that grouping or
category.
</p>
<p class="leafygreen-ui-1kp3ins">
The documents are sorted by
<code class="leafygreen-ui-1l06pbn">
count
</code>
in descending order.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-pipeline-pipe.-sortByCount" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$sortByCount
</code>
</span>
</a>
stage has the following prototype form:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $sortByCount: <expression> }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$sortByCount</span>: <<!-- -->expression<!-- -->> <!-- -->}</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
expression
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
Expression
</a>
to group by. You
can specify any expression except for a document literal.
</p>
<p class="leafygreen-ui-1kp3ins">
To specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/aggregation-pipeline/#std-label-agg-quick-ref-field-paths">
field path
</a>
,
prefix the field name with a dollar sign
<code class="leafygreen-ui-1l06pbn">
$
</code>
and enclose it
in quotes. For example, to group by the field
<code class="leafygreen-ui-1l06pbn">
employee
</code>
,
specify
<code class="leafygreen-ui-1l06pbn">
"$employee"
</code>
as the expression.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $sortByCount: \"$employee\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$sortByCount</span>: <span class="lg-highlight-string">"$employee"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Although you cannot specify a document literal for the group
by expression, you can, however, specify a field or an
expression that evaluates to a document. For example, if
<code class="leafygreen-ui-1l06pbn">
employee
</code>
and
<code class="leafygreen-ui-1l06pbn">
business
</code>
fields are document fields,
then the following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/mergeObjects/#mongodb-expression-exp.-mergeObjects">
<code class="leafygreen-ui-1l06pbn">
$mergeObjects
</code>
</a>
expression,
which evaluates to a document, is a valid argument to
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-pipeline-pipe.-sortByCount" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$sortByCount
</code>
:
</span>
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $sortByCount: { $mergeObjects: [ \"$employee\", \"$business\" ] } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$sortByCount</span>: <!-- -->{ <span class="lg-highlight-attr">$mergeObjects</span>: <!-- -->[ <span class="lg-highlight-string">"$employee"</span>, <span class="lg-highlight-string">"$business"</span> ] } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
However, the following example with the document literal
expression is invalid:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $sortByCount: { lname: \"$employee.last\", fname: \"$employee.first\" } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$sortByCount</span>: <!-- -->{ <span class="lg-highlight-attr">lname</span>: <span class="lg-highlight-string">"$employee.last"</span>, <span class="lg-highlight-attr">fname</span>: <span class="lg-highlight-string">"$employee.first"</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-type-comparison-order/">
Comparison/Sort Order
</a>
</p>
</div>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Considerations
<a class="headerlink leafygreen-ui-1kepx47" href="#considerations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="considerations">
</div>
</a>
</h2>
<span class="leafygreen-ui-1qnjd6d" id="std-label-sortbycount-memory-limit">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
$sortByCount
</code>
and Memory Restrictions
<a class="headerlink leafygreen-ui-1kepx47" href="#-sortbycount-and-memory-restrictions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-sortbycount-and-memory-restrictions">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, pipeline stages that require more than 100
megabytes of memory to execute write temporary files to disk by
default. These temporary files last for the duration of the pipeline
execution and can influence storage space on your instance. In earlier
versions of MongoDB, you must pass
<code class="leafygreen-ui-1l06pbn">
{ allowDiskUse: true }
</code>
to
individual
<code class="leafygreen-ui-1l06pbn">
find
</code>
and
<code class="leafygreen-ui-1l06pbn">
aggregate
</code>
commands to enable this
behavior.
</p>
<p class="leafygreen-ui-1kp3ins">
Individual
<code class="leafygreen-ui-1l06pbn">
find
</code>
and
<code class="leafygreen-ui-1l06pbn">
aggregate
</code>
commands can override the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.allowDiskUseByDefault">
<code class="leafygreen-ui-1l06pbn">
allowDiskUseByDefault
</code>
</a>
parameter by either:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Using
<code class="leafygreen-ui-1l06pbn">
{ allowDiskUse: true }
</code>
to allow writing temporary files out
to disk when
<code class="leafygreen-ui-1l06pbn">
allowDiskUseByDefault
</code>
is set to
<code class="leafygreen-ui-1l06pbn">
false
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Using
<code class="leafygreen-ui-1l06pbn">
{ allowDiskUse: false }
</code>
to prohibit writing temporary files
out to disk when
<code class="leafygreen-ui-1l06pbn">
allowDiskUseByDefault
</code>
is set to
<code class="leafygreen-ui-1l06pbn">
true
</code>
</p>
</li>
</ul>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
For MongoDB Atlas, it is recommended to
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/cluster-autoscaling/#std-label-cluster-autoscaling" target="_self">
<span>
configure storage auto-scaling
</span>
</a>
to prevent
long-running queries from filling up storage with temporary files.
</p>
<p class="leafygreen-ui-1kp3ins">
If your Atlas cluster uses storage auto-scaling, the temporary files
may cause your cluster to scale to the next storage tier.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For additional details, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/aggregation-pipeline-limits/#std-label-agg-pipeline-limits">
Aggregation Pipeline Limits
<!-- -->
.
</a>
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-pipeline-pipe.-sortByCount" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$sortByCount
</code>
</span>
</a>
stage is equivalent to the
following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
+
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/sort/#mongodb-pipeline-pipe.-sort">
<code class="leafygreen-ui-1l06pbn">
$sort
</code>
</a>
sequence:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $group: { _id: <expression>, count: { $sum: 1 } } },\n{ $sort: { count: -1 } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$group</span>: <!-- -->{ <span class="lg-highlight-attr">_id</span>: <<!-- -->expression<!-- -->><!-- -->,<!-- --> <span class="lg-highlight-attr">count</span>: <!-- -->{ <span class="lg-highlight-attr">$sum</span>: <span class="lg-highlight-number">1</span> } } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$sort</span>: <!-- -->{ <span class="lg-highlight-attr">count</span>: <!-- -->-<span class="lg-highlight-number">1</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Consider a collection
<code class="leafygreen-ui-1l06pbn">
exhibits
</code>
with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"title\" : \"The Pillars of Society\", \"artist\" : \"Grosz\", \"year\" : 1926, \"tags\" : [ \"painting\", \"satire\", \"Expressionism\", \"caricature\" ] }\n{ \"_id\" : 2, \"title\" : \"Melancholy III\", \"artist\" : \"Munch\", \"year\" : 1902, \"tags\" : [ \"woodcut\", \"Expressionism\" ] }\n{ \"_id\" : 3, \"title\" : \"Dancer\", \"artist\" : \"Miro\", \"year\" : 1925, \"tags\" : [ \"oil\", \"Surrealism\", \"painting\" ] }\n{ \"_id\" : 4, \"title\" : \"The Great Wave off Kanagawa\", \"artist\" : \"Hokusai\", \"tags\" : [ \"woodblock\", \"ukiyo-e\" ] }\n{ \"_id\" : 5, \"title\" : \"The Persistence of Memory\", \"artist\" : \"Dali\", \"year\" : 1931, \"tags\" : [ \"Surrealism\", \"painting\", \"oil\" ] }\n{ \"_id\" : 6, \"title\" : \"Composition VII\", \"artist\" : \"Kandinsky\", \"year\" : 1913, \"tags\" : [ \"oil\", \"painting\", \"abstract\" ] }\n{ \"_id\" : 7, \"title\" : \"The Scream\", \"artist\" : \"Munch\", \"year\" : 1893, \"tags\" : [ \"Expressionism\", \"painting\", \"oil\" ] }\n{ \"_id\" : 8, \"title\" : \"Blue Flower\", \"artist\" : \"O'Keefe\", \"year\" : 1918, \"tags\" : [ \"abstract\", \"painting\" ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"title"</span> <!-- -->: <span class="lg-highlight-string">"The Pillars of Society"</span>, <span class="lg-highlight-string">"artist"</span> <!-- -->: <span class="lg-highlight-string">"Grosz"</span>, <span class="lg-highlight-string">"year"</span> <!-- -->: <span class="lg-highlight-number">1926</span>, <span class="lg-highlight-string">"tags"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"painting"</span>, <span class="lg-highlight-string">"satire"</span>, <span class="lg-highlight-string">"Expressionism"</span>, <span class="lg-highlight-string">"caricature"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"title"</span> <!-- -->: <span class="lg-highlight-string">"Melancholy III"</span>, <span class="lg-highlight-string">"artist"</span> <!-- -->: <span class="lg-highlight-string">"Munch"</span>, <span class="lg-highlight-string">"year"</span> <!-- -->: <span class="lg-highlight-number">1902</span>, <span class="lg-highlight-string">"tags"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"woodcut"</span>, <span class="lg-highlight-string">"Expressionism"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"title"</span> <!-- -->: <span class="lg-highlight-string">"Dancer"</span>, <span class="lg-highlight-string">"artist"</span> <!-- -->: <span class="lg-highlight-string">"Miro"</span>, <span class="lg-highlight-string">"year"</span> <!-- -->: <span class="lg-highlight-number">1925</span>, <span class="lg-highlight-string">"tags"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"oil"</span>, <span class="lg-highlight-string">"Surrealism"</span>, <span class="lg-highlight-string">"painting"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"title"</span> <!-- -->: <span class="lg-highlight-string">"The Great Wave off Kanagawa"</span>, <span class="lg-highlight-string">"artist"</span> <!-- -->: <span class="lg-highlight-string">"Hokusai"</span>, <span class="lg-highlight-string">"tags"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"woodblock"</span>, <span class="lg-highlight-string">"ukiyo-e"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"title"</span> <!-- -->: <span class="lg-highlight-string">"The Persistence of Memory"</span>, <span class="lg-highlight-string">"artist"</span> <!-- -->: <span class="lg-highlight-string">"Dali"</span>, <span class="lg-highlight-string">"year"</span> <!-- -->: <span class="lg-highlight-number">1931</span>, <span class="lg-highlight-string">"tags"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"Surrealism"</span>, <span class="lg-highlight-string">"painting"</span>, <span class="lg-highlight-string">"oil"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"title"</span> <!-- -->: <span class="lg-highlight-string">"Composition VII"</span>, <span class="lg-highlight-string">"artist"</span> <!-- -->: <span class="lg-highlight-string">"Kandinsky"</span>, <span class="lg-highlight-string">"year"</span> <!-- -->: <span class="lg-highlight-number">1913</span>, <span class="lg-highlight-string">"tags"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"oil"</span>, <span class="lg-highlight-string">"painting"</span>, <span class="lg-highlight-string">"abstract"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">7</span>, <span class="lg-highlight-string">"title"</span> <!-- -->: <span class="lg-highlight-string">"The Scream"</span>, <span class="lg-highlight-string">"artist"</span> <!-- -->: <span class="lg-highlight-string">"Munch"</span>, <span class="lg-highlight-string">"year"</span> <!-- -->: <span class="lg-highlight-number">1893</span>, <span class="lg-highlight-string">"tags"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"Expressionism"</span>, <span class="lg-highlight-string">"painting"</span>, <span class="lg-highlight-string">"oil"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">8</span>, <span class="lg-highlight-string">"title"</span> <!-- -->: <span class="lg-highlight-string">"Blue Flower"</span>, <span class="lg-highlight-string">"artist"</span> <!-- -->: <span class="lg-highlight-string">"O'Keefe"</span>, <span class="lg-highlight-string">"year"</span> <!-- -->: <span class="lg-highlight-number">1918</span>, <span class="lg-highlight-string">"tags"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"abstract"</span>, <span class="lg-highlight-string">"painting"</span> ] }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following operation
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/unwind/#mongodb-pipeline-pipe.-unwind">
<code class="leafygreen-ui-1l06pbn">
unwinds
</code>
</a>
the
<code class="leafygreen-ui-1l06pbn">
tags
</code>
array and uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-pipeline-pipe.-sortByCount" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$sortByCount
</code>
</span>
</a>
stage to count the
number of documents associated with each tag:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.exhibits.aggregate( [ { $unwind: \"$tags\" }, { $sortByCount: \"$tags\" } ] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">exhibits</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">$unwind</span>: <span class="lg-highlight-string">"$tags"</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">$sortByCount</span>: <span class="lg-highlight-string">"$tags"</span> } ] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following documents, sorted in descending
order by count:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : \"painting\", \"count\" : 6 }\n{ \"_id\" : \"oil\", \"count\" : 4 }\n{ \"_id\" : \"Expressionism\", \"count\" : 3 }\n{ \"_id\" : \"Surrealism\", \"count\" : 2 }\n{ \"_id\" : \"abstract\", \"count\" : 2 }\n{ \"_id\" : \"woodblock\", \"count\" : 1 }\n{ \"_id\" : \"woodcut\", \"count\" : 1 }\n{ \"_id\" : \"ukiyo-e\", \"count\" : 1 }\n{ \"_id\" : \"satire\", \"count\" : 1 }\n{ \"_id\" : \"caricature\", \"count\" : 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"painting"</span>, <span class="lg-highlight-string">"count"</span> <!-- -->: <span class="lg-highlight-number">6</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"oil"</span>, <span class="lg-highlight-string">"count"</span> <!-- -->: <span class="lg-highlight-number">4</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"Expressionism"</span>, <span class="lg-highlight-string">"count"</span> <!-- -->: <span class="lg-highlight-number">3</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"Surrealism"</span>, <span class="lg-highlight-string">"count"</span> <!-- -->: <span class="lg-highlight-number">2</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"abstract"</span>, <span class="lg-highlight-string">"count"</span> <!-- -->: <span class="lg-highlight-number">2</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"woodblock"</span>, <span class="lg-highlight-string">"count"</span> <!-- -->: <span class="lg-highlight-number">1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"woodcut"</span>, <span class="lg-highlight-string">"count"</span> <!-- -->: <span class="lg-highlight-number">1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"ukiyo-e"</span>, <span class="lg-highlight-string">"count"</span> <!-- -->: <span class="lg-highlight-number">1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"satire"</span>, <span class="lg-highlight-string">"count"</span> <!-- -->: <span class="lg-highlight-number">1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"caricature"</span>, <span class="lg-highlight-string">"count"</span> <!-- -->: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/command/startSession/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
startSession
<a class="headerlink leafygreen-ui-1kepx47" href="#startsession" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="startsession">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#output" target="_self">
<span>
Output
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="dbcommand">
<dt>
<code class="leafygreen-ui-1l06pbn">
startSession
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-dbcommand-dbcmd.startSession" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-dbcommand-dbcmd.startSession">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.startSession" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
startSession
</code>
</span>
</a>
command starts a new logical
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/read-isolation-consistency-recency/#std-label-sessions">
session
</a>
for a sequence of operations.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
In
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#std-program-mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
, this command can also be run through the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Mongo.startSession/#mongodb-method-Mongo.startSession">
<code class="leafygreen-ui-1l06pbn">
Mongo.startSession()
</code>
</a>
helper method
<!-- -->
.
</p>
<p class="leafygreen-ui-1kp3ins">
Helper methods are convenient for
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#std-program-mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
users, but they may not
return the same level of information as database commands. In cases where
the convenience is not needed or the additional return fields are required,
use the database command.
</p>
</div>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This command is available in deployments hosted in the following environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This command is supported in all MongoDB Atlas clusters.
For information on Atlas support for all commands, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/" target="_self">
<span>
Unsupported Commands
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The command has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n startSession: 1\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">startSession</span>: <span class="lg-highlight-number">1</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To run
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.startSession" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
startSession
</code>
</span>
</a>
, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.runCommand/#mongodb-method-db.runCommand">
<code class="leafygreen-ui-1l06pbn">
db.runCommand( { <command> } )
</code>
</a>
method.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n startSession: 1\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">startSession</span>: <span class="lg-highlight-number">1</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
featureCompatibilityVersion
</code>
must be 3.6 or greater to use the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.startSession" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
startSession
</code>
</span>
</a>
command.
</p>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Mongo.startSession/#mongodb-method-Mongo.startSession">
<code class="leafygreen-ui-1l06pbn">
Mongo.startSession()
</code>
</a>
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
If the deployment enforces authentication/authorization, you must be
authenticated to run the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.startSession" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
startSession
</code>
</span>
</a>
command. The user
who runs
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.startSession" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
startSession
</code>
</span>
</a>
owns the created session, and only
that user can use the session.
</p>
<p class="leafygreen-ui-1kp3ins">
If the deployment does not enforce authentication/authorization, a
created session has no owner and can be used by any user on any
connection. If the user authenticates and creates a session for a
deployment that does not enforce authentication/authorization, the user
owns the session. However, any user on any connection may use the
session.
</p>
<p class="leafygreen-ui-1kp3ins">
If the deployment transitions to auth without any downtime, any
sessions without an owner cannot be used.
</p>
<p class="leafygreen-ui-1kp3ins">
A session can only be used with the
<code class="leafygreen-ui-1l06pbn">
MongoClient
</code>
object that created
the session. A single session cannot be used concurrently. Operations
that use a single session must be run sequentially.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Output
<a class="headerlink leafygreen-ui-1kepx47" href="#output" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="output">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
In addition to the status and operation time of the command, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.startSession" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
startSession
</code>
</span>
</a>
returns the following session specific
information:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
id
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The document that contains the 16-byte Universally Unique
Identifier (UUID) portion of the session's identifier.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"id: { id: <uuid> }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-attr">id</span>: <!-- -->{ <span class="lg-highlight-attr">id</span>: <<span class="lg-highlight-variable lg-highlight-constant">UUID</span>> <!-- -->}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The session's identifier consists of this UUID concatenated with
the hash of the authenticated user credentials.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
timeoutMinutes
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
number
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The amount of time, in minutes, since the last client use that a
session remains active before expiring. By default, sessions
have an expiration timeout of 30 minutes. To change the value,
set the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.localLogicalSessionTimeoutMinutes">
<code class="leafygreen-ui-1l06pbn">
localLogicalSessionTimeoutMinutes
</code>
</a>
parameter
when starting up
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
. For replica sets and sharded
clusters, you must specify the same value on every member.
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/data-model-operations/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Operational Factors and Data Models
<a class="headerlink leafygreen-ui-1kepx47" href="#operational-factors-and-data-models" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="operational-factors-and-data-models">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#atomicity" target="_self">
<span>
Atomicity
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#sharding" target="_self">
<span>
Sharding
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#indexes" target="_self">
<span>
Indexes
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#large-number-of-collections" target="_self">
<span>
Large Number of Collections
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#collection-contains-large-number-of-small-documents" target="_self">
<span>
Collection Contains Large Number of Small Documents
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#storage-optimization-for-small-documents" target="_self">
<span>
Storage Optimization for Small Documents
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#data-lifecycle-management" target="_self">
<span>
Data Lifecycle Management
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
Modeling application data for MongoDB should consider various
operational factors that impact the performance of MongoDB. For
instance, different data models can allow for more efficient queries,
increase the throughput of insert and update operations, or distribute
activity to a sharded cluster more effectively.
</p>
<p class="leafygreen-ui-1kp3ins">
When developing a data model, analyze all of your application's
<a class="leafygreen-ui-tqgtui" href="/docs/manual/crud/#std-label-crud">
read and write operations
</a>
in conjunction with the
following considerations.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-data-model-atomicity">
</span>
<span class="leafygreen-ui-1qnjd6d" id="std-label-data-modeling-atomicity">
</span>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Atomicity
<a class="headerlink leafygreen-ui-1kepx47" href="#atomicity" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="atomicity">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
In MongoDB, a write operation is atomic on the level of a single
document, even if the operation modifies multiple embedded documents
<em>
within
</em>
a single document. When a single write operation modifies
multiple documents (e.g.
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.updateMany/#mongodb-method-db.collection.updateMany">
<code class="leafygreen-ui-1l06pbn">
db.collection.updateMany()
</code>
</a>
), the
modification of each document is atomic, but the operation as a whole
is not atomic.
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Embedded Data Model
<a class="headerlink leafygreen-ui-1kepx47" href="#embedded-data-model" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="embedded-data-model">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The embedded data model combines all related data in a single document
instead of normalizing across multiple documents and collections. This
data model facilitates atomic operations.
</p>
<p class="leafygreen-ui-1kp3ins">
See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/model-data-for-atomic-operations/#std-label-data-modeling-atomic-operation">
Model Data for Atomic Operations
</a>
for an example data model
that provides atomic updates for a single document.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Multi-Document Transaction
<a class="headerlink leafygreen-ui-1kepx47" href="#multi-document-transaction" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="multi-document-transaction">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
For data models that store references between related
pieces of data, the application must issue separate read and write
operations to retrieve and modify these related pieces of data.
</p>
<p class="leafygreen-ui-1kp3ins">
For situations that require atomicity of reads and writes to multiple
documents (in a single or multiple collections), MongoDB supports
distributed transactions, including transactions on replica sets and
sharded clusters.
</p>
<p class="leafygreen-ui-1kp3ins">
For more information, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions">
transactions
</a>
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
In most cases, a distributed transaction incurs a greater
performance cost over single document writes, and the
availability of distributed transactions should not be a
replacement for effective schema design. For many scenarios, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/data-modeling/concepts/embedding-vs-references/#std-label-data-modeling-embedding">
denormalized data model (embedded documents and arrays)
</a>
will continue to be optimal for your
data and use cases. That is, for many scenarios, modeling your data
appropriately will minimize the need for distributed
transactions.
</p>
<p class="leafygreen-ui-1kp3ins">
For additional transactions usage considerations
(such as runtime limit and oplog size limit), see also
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions-production-consideration/#std-label-production-considerations">
Production Considerations
<!-- -->
.
</a>
</p>
</div>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Sharding
<a class="headerlink leafygreen-ui-1kepx47" href="#sharding" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sharding">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
MongoDB uses
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-sharding">
sharding
</a>
to provide horizontal scaling. These
clusters support deployments with large data sets and high-throughput
operations. Sharding allows users to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-data-partition">
partition
</a>
a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-collection">
collection
</a>
within a database to distribute the collection's
documents across a number of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instances or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-shard">
shards
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
To distribute data and application traffic in a sharded collection,
MongoDB uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-shard-key/#std-label-shard-key">
shard key
</a>
. Selecting the proper
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-shard-key/#std-label-shard-key">
shard key
</a>
has significant implications for
performance, and can enable or prevent query isolation and increased
write capacity. While you can
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-change-a-shard-key/#std-label-change-a-shard-key">
change your shard key
</a>
later, it is important to carefully consider your
shard key choice.
</p>
<p class="leafygreen-ui-1kp3ins">
See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/sharding/">
Sharding
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-shard-key/">
Shard Keys
</a>
for more information.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-data-model-indexes">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Indexes
<a class="headerlink leafygreen-ui-1kepx47" href="#indexes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="indexes">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Use indexes to improve performance for common queries. Build indexes on
fields that appear often in queries and for all operations that return
sorted results. MongoDB automatically creates a unique index on the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field.
</p>
<p class="leafygreen-ui-1kp3ins">
As you create indexes, consider the following behaviors of indexes:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Each index requires at least 8 kB of data space.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Adding an index has some negative performance impact for write
operations. For collections with high write-to-read ratio, indexes
are expensive since each insert must also update any indexes.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Collections with high read-to-write ratio often benefit from
additional indexes. Indexes do not affect un-indexed read operations.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
When active, each index consumes disk space and memory. This usage
can be significant and should be tracked for capacity planning,
especially for concerns over working set size.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/applications/indexes/">
Indexing Strategies
</a>
for more information on indexes as
well as
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/analyze-query-plan/">
Interpret Explain Plan Results
</a>
. Additionally, the MongoDB
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/manage-the-database-profiler/#std-label-database-profiler">
database profiler
</a>
may
help identify inefficient queries.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-data-model-large-number-of-collections">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Large Number of Collections
<a class="headerlink leafygreen-ui-1kepx47" href="#large-number-of-collections" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="large-number-of-collections">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
In certain situations, you might choose to store related information in
several collections rather than in a single collection.
</p>
<p class="leafygreen-ui-1kp3ins">
Consider a sample collection
<code class="leafygreen-ui-1l06pbn">
logs
</code>
that stores log documents for
various environment and applications. The
<code class="leafygreen-ui-1l06pbn">
logs
</code>
collection contains
documents of the following form:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ log: \"dev\", ts: ..., info: ... }\n{ log: \"debug\", ts: ..., info: ...}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">log</span>: <span class="lg-highlight-string">"dev"</span>, <span class="lg-highlight-attr">ts</span>: <!-- -->...<!-- -->, <span class="lg-highlight-attr">info</span>: <!-- -->...<!-- --> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">log</span>: <span class="lg-highlight-string">"debug"</span>, <span class="lg-highlight-attr">ts</span>: <!-- -->...<!-- -->, <span class="lg-highlight-attr">info</span>: <!-- -->...<!-- -->}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
If the total number of documents is low, you may group documents into
collection by type. For logs, consider maintaining distinct log
collections, such as
<code class="leafygreen-ui-1l06pbn">
logs_dev
</code>
and
<code class="leafygreen-ui-1l06pbn">
logs_debug
</code>
. The
<code class="leafygreen-ui-1l06pbn">
logs_dev
</code>
collection would contain only the documents related to the dev
environment.
</p>
<p class="leafygreen-ui-1kp3ins">
Generally, having a large number of collections has no significant
performance penalty and results in very good performance. Distinct
collections are very important for high-throughput batch processing.
</p>
<p class="leafygreen-ui-1kp3ins">
When using models that have a large number of collections, consider
the following behaviors:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Each collection has a certain minimum overhead of a few kilobytes.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Each index, including the index on
<code class="leafygreen-ui-1l06pbn">
_id
</code>
, requires at least 8 kB of
data space.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
For each
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-database">
database
</a>
, a single namespace file (i.e.
<code class="leafygreen-ui-1l06pbn">
<database>.ns
</code>
) stores all meta-data for that database, and each
index and collection has its own entry in the namespace file. See
places
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/limits/#std-label-limit-namespace-length">
namespace length limits
</a>
for
specific limitations.
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-faq-developers-embed-documents">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Collection Contains Large Number of Small Documents
<a class="headerlink leafygreen-ui-1kepx47" href="#collection-contains-large-number-of-small-documents" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="collection-contains-large-number-of-small-documents">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You should consider embedding for performance reasons if you have a
collection with a large number of small documents. If you can group
these small documents by some logical relationship
<em>
and
</em>
you frequently
retrieve the documents by this grouping, you might consider
"rolling-up" the small documents into larger documents that contain an
array of embedded documents.
</p>
<p class="leafygreen-ui-1kp3ins">
"Rolling up" these small documents into logical groupings means that
queries to retrieve a group of documents involve sequential reads and
fewer random disk accesses. Additionally, "rolling up" documents and
moving common fields to the larger document benefit the index on these
fields. There would be fewer copies of the common fields
<em>
and
</em>
there
would be fewer associated key entries in the corresponding index. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/indexes/">
Indexes
</a>
for more information on indexes.
</p>
<p class="leafygreen-ui-1kp3ins">
However, if you often only need to retrieve a subset of the documents
within the group, then "rolling-up" the documents may not provide
better performance. Furthermore, if small, separate documents represent
the natural model for the data, you should maintain that model.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-faq-small-documents">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Storage Optimization for Small Documents
<a class="headerlink leafygreen-ui-1kepx47" href="#storage-optimization-for-small-documents" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="storage-optimization-for-small-documents">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Each MongoDB document contains a certain amount of overhead. This
overhead is normally insignificant but becomes significant if all
documents are just a few bytes, as might be the case if the documents
in your collection only have one or two fields.
</p>
<p class="leafygreen-ui-1kp3ins">
Consider the following suggestions and strategies for optimizing
storage utilization for these collections:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Use the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field explicitly.
</p>
<p class="leafygreen-ui-1kp3ins">
MongoDB clients automatically add an
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field to each document
and generate a unique 12-byte
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-ObjectId">
ObjectId
</a>
for the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field. Furthermore, MongoDB always indexes the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field. For
smaller documents this may account for a significant amount of
space.
</p>
<p class="leafygreen-ui-1kp3ins">
To optimize storage use, users can specify a value for the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field
explicitly when inserting documents into the collection. This
strategy allows applications to store a value in the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field
that would have occupied space in another portion of the document.
</p>
<p class="leafygreen-ui-1kp3ins">
You can store any value in the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field, but because this value
serves as a primary key for documents in the collection, it must
uniquely identify them. If the field's value is not unique, then it
cannot serve as a primary key as there would be collisions in the
collection.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Use shorter field names.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Shortening field names reduces expressiveness and does not provide
considerable benefit for larger documents and where document
overhead is not of significant concern. Shorter field names do not
reduce the size of indexes, because indexes have a predefined
structure.
</p>
<p class="leafygreen-ui-1kp3ins">
In general, it is not necessary to use short field names.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
MongoDB stores all field names in every document. For most
documents, this represents a small fraction of the space used by a
document; however, for small documents the field names may represent
a proportionally large amount of space. Consider a collection of
small documents that resemble the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ last_name : \"Smith\", best_score: 3.9 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->last_name <!-- -->: <span class="lg-highlight-string">"Smith"</span>, <span class="lg-highlight-attr">best_score</span>: <span class="lg-highlight-number">3.9</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
If you shorten the field named
<code class="leafygreen-ui-1l06pbn">
last_name
</code>
to
<code class="leafygreen-ui-1l06pbn">
lname
</code>
and the
field named
<code class="leafygreen-ui-1l06pbn">
best_score
</code>
to
<code class="leafygreen-ui-1l06pbn">
score
</code>
, as follows, you could save 9
bytes per document.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ lname : \"Smith\", score : 3.9 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->lname <!-- -->: <span class="lg-highlight-string">"Smith"</span>, <!-- -->score <!-- -->: <span class="lg-highlight-number">3.9</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Embed documents.
</p>
<p class="leafygreen-ui-1kp3ins">
In some cases you may want to embed documents in other documents and
save on the per-document overhead. See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-faq-developers-embed-documents" target="_self">
<span>
Collection Contains Large Number of Small Documents
<!-- -->
.
</span>
</a>
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Data Lifecycle Management
<a class="headerlink leafygreen-ui-1kepx47" href="#data-lifecycle-management" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="data-lifecycle-management">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Data modeling decisions should take data lifecycle management into
consideration.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/expire-data/#std-label-ttl-collections">
Time to Live or TTL feature
</a>
of
collections expires documents after a period of time. Consider using
the TTL feature if your application requires some data to persist in
the database for a limited period of time.
</p>
<p class="leafygreen-ui-1kp3ins">
Additionally, if your application only uses recently inserted
documents, consider
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/capped-collections/">
Capped Collections
</a>
. Capped collections
provide
<em>
first-in-first-out
</em>
(FIFO) management of inserted documents
and efficiently support operations that insert and read documents based
on insertion order.
</p>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/indexes/index-types/index-compound/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Compound Indexes
<a class="headerlink leafygreen-ui-1kepx47" href="#compound-indexes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compound-indexes">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#use-cases" target="_self">
<span>
Use Cases
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#get-started" target="_self">
<span>
Get Started
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#details" target="_self">
<span>
Details
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#field-limit" target="_self">
<span>
Field Limit
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#field-order" target="_self">
<span>
Field Order
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#sort-order" target="_self">
<span>
Sort Order
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#hashed-index-fields" target="_self">
<span>
Hashed Index Fields
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#index-prefixes" target="_self">
<span>
Index Prefixes
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#sparse-compound-indexes" target="_self">
<span>
Sparse Compound Indexes
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#learn-more" target="_self">
<span>
Learn More
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
Compound indexes collect and sort data from two or more fields in each
document in a collection. Data is grouped by the first field in the
index and then by each subsequent field.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, the following image shows a compound index where documents
are first grouped by
<code class="leafygreen-ui-1l06pbn">
userid
</code>
in ascending order (alphabetically).
Then, the
<code class="leafygreen-ui-1l06pbn">
scores
</code>
for each
<code class="leafygreen-ui-1l06pbn">
userid
</code>
are sorted in descending order:
</p>
<div class="figure css-5vkxs0" style="width: 720px;">
<img alt="Diagram of a compound index on the ``userid`` field (ascending) and the ``score`` field (descending). The index sorts first by the ``userid`` field and then by the ``score`` field." class="leafygreen-ui-1qnf57e" height="260" src="/docs/manual/images/index-compound-key.bakedsvg.svg" style="--border-color: #C1C7C6;" width="720"/>
</div>
<p class="leafygreen-ui-1kp3ins">
Indexing commonly queried fields increases the
likelihood of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-optimization/#std-label-indexes-covered-queries">
covered queries
</a>
. A
covered query is a query that can be satisfied entirely using an index
and does not have to examine any documents, leading to greatly improved performance.
</p>
<p class="leafygreen-ui-1kp3ins">
To create a compound index, use the following prototype:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.<collection>.createIndex( {\n <field1>: <sortorder>,\n <field2>: <sortorder>,\n ...\n <fieldn>: <sortorder>\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<collection>.<span class="lg-highlight-title lg-highlight-function">createIndex</span>( {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <field1>: <sortOrder>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <field2>: <sortOrder>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <fieldN>: <sortOrder></td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<a class="css-53dzkk" href="https://www.mongodb.com/docs/atlas/atlas-ui/indexes/">
<div class="css-z0l49d">
<div class="css-fw7ipj">
<svg aria-label="Cloud Icon" class="leafygreen-ui-1t2jgtk" fill="none" height="16" role="img" viewbox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg">
<path d="M12.571 8.143c0 1.775-.899 3.34-2.267 4.264l-.014.01a5.12 5.12 0 0 1-2.861.869H2.857a2.857 2.857 0 0 1-.545-5.663 5.144 5.144 0 0 1 10.26.52ZM13.821 8.143a6.38 6.38 0 0 1-2.358 4.96 3.429 3.429 0 1 0 2.17-6.506c.123.494.188 1.013.188 1.546Z" fill="currentColor">
</path>
</svg>
</div>
<p class="leafygreen-ui-1kp3ins">
You can
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/atlas-ui/indexes/" target="_self">
<span>
create and manage compound indexes in the UI
</span>
</a>
for deployments hosted in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas.
</span>
</a>
</p>
</div>
</a>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Use Cases
<a class="headerlink leafygreen-ui-1kepx47" href="#use-cases" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="use-cases">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
If your application repeatedly runs a query that contains multiple
fields, you can create a compound index to improve performance for that
query. For example, a grocery store manager often needs to look up
inventory items by name and quantity to determine which items are low
stock. You can create a compound index on both the
<code class="leafygreen-ui-1l06pbn">
item
</code>
and
<code class="leafygreen-ui-1l06pbn">
quantity
</code>
fields to improve query performance.
</p>
<p class="leafygreen-ui-1kp3ins">
A compound index on commonly queried fields increases the chances of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-optimization/#std-label-indexes-covered-queries">
covering
</a>
those queries. Covered queries
are queries that can be satisfied entirely using an index, without
examining any documents. This optimizes query performance.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Get Started
<a class="headerlink leafygreen-ui-1kepx47" href="#get-started" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="get-started">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To create a compound index, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-compound/create-compound-index/#std-label-index-create-compound">
Create a Compound Index.
</a>
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Details
<a class="headerlink leafygreen-ui-1kepx47" href="#details" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="details">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This section describes technical details and limitations for compound
indexes.
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Field Limit
<a class="headerlink leafygreen-ui-1kepx47" href="#field-limit" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="field-limit">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
A single compound index can contain up to 32 fields.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Field Order
<a class="headerlink leafygreen-ui-1kepx47" href="#field-order" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="field-order">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The order of the indexed fields impacts the effectiveness of a compound
index. Compound indexes contain references to documents according to the
order of the fields in the index. To create efficient compound indexes,
follow the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/equality-sort-range-rule/#std-label-esr-indexing-rule">
ESR (Equality, Sort, Range) rule.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Sort Order
<a class="headerlink leafygreen-ui-1kepx47" href="#sort-order" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sort-order">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Indexes store references to fields in either ascending (
<code class="leafygreen-ui-1l06pbn">
1
</code>
) or
descending (
<code class="leafygreen-ui-1l06pbn">
-1
</code>
) sort order. For compound indexes, sort order can
determine whether the index supports a sort operation. For more
information, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-compound/sort-order/#std-label-index-compound-sort-order">
Compound Index Sort Order.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Hashed Index Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#hashed-index-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="hashed-index-fields">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Compound indexes may contain
<strong>
a single
</strong>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-hashed/#std-label-index-type-hashed">
hashed index field.
</a>
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-compound-index-prefix">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Index Prefixes
<a class="headerlink leafygreen-ui-1kepx47" href="#index-prefixes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="index-prefixes">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Index prefixes are the beginning subsets of indexed fields. Compound
indexes support queries on all fields included in the index prefix.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, consider this compound index:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"item\": 1, \"location\": 1, \"stock\": 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"location"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"stock"</span>: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The index has these index prefixes:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
{ item: 1 }
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
{ item: 1, location: 1 }
</code>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
MongoDB can use the compound index to support queries on these field
combinations:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
item
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
item
</code>
and
<code class="leafygreen-ui-1l06pbn">
location
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
item
</code>
,
<code class="leafygreen-ui-1l06pbn">
location
</code>
, and
<code class="leafygreen-ui-1l06pbn">
stock
</code>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
MongoDB can also use the index to support a query on the
<code class="leafygreen-ui-1l06pbn">
item
</code>
and
<code class="leafygreen-ui-1l06pbn">
stock
</code>
fields, since the
<code class="leafygreen-ui-1l06pbn">
item
</code>
field corresponds to a prefix.
However, only the
<code class="leafygreen-ui-1l06pbn">
item
</code>
field in the index can support this query.
The query cannot use the
<code class="leafygreen-ui-1l06pbn">
stock
</code>
field which follows
<code class="leafygreen-ui-1l06pbn">
location
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
Index fields are parsed in order; if a query omits an index prefix, it
is unable to use any index fields that follow that prefix.
</p>
<p class="leafygreen-ui-1kp3ins">
MongoDB
<strong>
cannot
</strong>
use the compound index to support queries on these
field combinations:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
location
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
stock
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
location
</code>
and
<code class="leafygreen-ui-1l06pbn">
stock
</code>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Without the
<code class="leafygreen-ui-1l06pbn">
item
</code>
field, none of the preceding field combinations
correspond to a prefix index.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
Remove Redundant Indexes
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If you have a collection that has both a compound index and an index on
its prefix (for example,
<code class="leafygreen-ui-1l06pbn">
{ a: 1, b: 1 }
</code>
and
<code class="leafygreen-ui-1l06pbn">
{ a: 1 }
</code>
), if
neither index has a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-sparse/#std-label-index-type-sparse">
sparse
</a>
or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-unique/#std-label-index-type-unique">
unique
</a>
constraint, you can remove the index on the prefix
(
<code class="leafygreen-ui-1l06pbn">
{ a: 1 }
</code>
). MongoDB uses the compound index in all of the situations
that it would have used the prefix index.
</p>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Sparse Compound Indexes
<a class="headerlink leafygreen-ui-1kepx47" href="#sparse-compound-indexes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sparse-compound-indexes">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Compound indexes can contain different types of sparse indexes. The
combination of index types determines how the compound index matches
documents.
</p>
<p class="leafygreen-ui-1kp3ins">
This table summarizes the behavior of a compound index that contains
different types of sparse indexes:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Compound Index Components
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Compound Index Behavior
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
Ascending indexes
</div>
<div class="line">
Descending indexes
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Only indexes documents that contain a value for at least one of
the keys.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
Ascending indexes
</div>
<div class="line">
Descending indexes
</div>
<div class="line">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/geospatial-queries/#std-label-index-feature-geospatial">
Geospatial indexes
</a>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Only indexes a document when it contains a value for one of
the
<code class="leafygreen-ui-1l06pbn">
geospatial
</code>
fields. Does not index documents in the
ascending or descending indexes.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
Ascending indexes
</div>
<div class="line">
Descending indexes
</div>
<div class="line">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-text/#std-label-index-feature-text">
Text indexes
</a>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Only indexes a document when it matches one of the
<code class="leafygreen-ui-1l06pbn">
text
</code>
fields. Does not index documents in the ascending or descending
indexes.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Learn More
<a class="headerlink leafygreen-ui-1kepx47" href="#learn-more" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="learn-more">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To learn how to create efficient compound indexes, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/equality-sort-range-rule/#std-label-esr-indexing-rule">
The ESR (Equality, Sort, Range) Rule.
</a>
</p>
</section>
</section>
|
https://www.mongodb.com/docs/manual/tutorial/rotate-key-replica-set/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Rotate Keys for Self-Managed Replica Sets
<a class="headerlink leafygreen-ui-1kepx47" href="#rotate-keys-for-self-managed-replica-sets" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="rotate-keys-for-self-managed-replica-sets">
</div>
</a>
</h1>
<p class="leafygreen-ui-1kp3ins">
Replica set members can use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/security-internal-authentication/#std-label-internal-auth-keyfile">
keyfiles
</a>
to
authenticate each other as members of the same deployment.
</p>
<p class="leafygreen-ui-1kp3ins">
A
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/security-internal-authentication/#std-label-internal-auth-keyfile">
keyfile
</a>
can
contain multiple keys and membership authentication is established if
at least one key is common across members. This allows for rolling
upgrade of the keys without downtime.
</p>
<p class="leafygreen-ui-1kp3ins">
The following tutorial steps through the process to update the key for
a replica set without downtime.
<a class="footnote-reference header-buffer" href="#footnote-exclude-encryption-keyfile" id="ref-exclude-encryption-keyfile-id1">
[
<!-- -->
1
<!-- -->
]
</a>
</p>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The example keys in this tutorial are for illustrative purposes
only. Do
<strong class="css-4dei7l">
NOT
</strong>
use for your deployment. Instead, generate a
keyfile using any method you choose (for example,
<code class="leafygreen-ui-1l06pbn">
openssl rand -base64
756
</code>
, etc.).
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Consider a replica set where each member's keyfile contains the
following key:
</p>
<div class="figure css-5vkxs0" style="width:568px">
<img alt="Image of current key to replace." class="leafygreen-ui-1qnf57e" height="125.00000000000001" src="/docs/manual/static/f5335f85341aa04e4cdb060a70256641/95d4b/example-key1.webp" srcset="/docs/manual/static/f5335f85341aa04e4cdb060a70256641/3675d/example-key1.webp 142w,
/docs/manual/static/f5335f85341aa04e4cdb060a70256641/d3b9a/example-key1.webp 284w,
/docs/manual/static/f5335f85341aa04e4cdb060a70256641/95d4b/example-key1.webp 568w" style="--border-color:#C1C7C6" width="568"/>
</div>
<p class="leafygreen-ui-1kp3ins">
The following procedure updates the replica set members to use a new
key:
</p>
<div class="figure css-5vkxs0" style="width:568px">
<img alt="Image of new key." class="leafygreen-ui-1qnf57e" height="134" src="/docs/manual/static/f7cb9450fb37ad6000e5155fe8e7fa99/6c107/example-key2.webp" srcset="/docs/manual/static/f7cb9450fb37ad6000e5155fe8e7fa99/e95b3/example-key2.webp 142w,
/docs/manual/static/f7cb9450fb37ad6000e5155fe8e7fa99/50690/example-key2.webp 284w,
/docs/manual/static/f7cb9450fb37ad6000e5155fe8e7fa99/6c107/example-key2.webp 568w" style="--border-color:#C1C7C6" width="568"/>
</div>
<table class="header-buffer leafygreen-ui-rbqgrl" frame="void" id="footnote-exclude-encryption-keyfile" rules="none">
<colgroup>
<col/>
</colgroup>
<tbody valign="top">
<tr>
<td class="leafygreen-ui-17r2xs0">
[
<a href="#ref-exclude-encryption-keyfile-id1">
1
</a>
]
</td>
<td class="leafygreen-ui-17r2xs0">
<!-- -->
This tutorial is not applicable to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/configure-encryption/#std-label-encrypt-local-key-mgmt">
keyfile
</a>
used for the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/security-encryption-at-rest/">
MongoDB's encrypted
storage engine
</a>
local key
management. That
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/configure-encryption/#std-label-encrypt-local-key-mgmt">
keyfile
</a>
can only
contain a single key.
</td>
</tr>
</tbody>
</table>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Procedure
<a class="headerlink leafygreen-ui-1kepx47" href="#procedure" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="procedure">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
1. Modify the Keyfile to Include Old and New Keys
<a class="headerlink leafygreen-ui-1kepx47" href="#1.-modify-the-keyfile-to-include-old-and-new-keys" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="1.-modify-the-keyfile-to-include-old-and-new-keys">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Modify each member's keyfile to include both the old and new keys. You
can specify multiple keys either as strings enclosed in quotes or as a
sequence of keys.
</p>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The example keys in this tutorial are for illustrative purposes
only. Do
<strong class="css-4dei7l">
NOT
</strong>
use for your deployment. Instead, generate a
keyfile using any method you choose (e.g.
<code class="leafygreen-ui-1l06pbn">
openssl rand -base64
756
</code>
, etc.).
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
You can specify multiple key strings as a sequence of key
strings (optionally enclosed in single or double quotes).
</p>
<div class="figure css-5vkxs0" style="width:600px">
<div class="gatsby-image-wrapper gatsby-image-wrapper-constrained leafygreen-ui-12xaq6r" data-gatsby-image-wrapper="">
<div style="max-width:600px;display:block">
<img alt="" aria-hidden="true" role="presentation" src="data:image/svg+xml;charset=utf-8,%3Csvg%20height='281'%20width='600'%20xmlns='http://www.w3.org/2000/svg'%20version='1.1'%3E%3C/svg%3E" style="max-width:100%;display:block;position:static"/>
</div>
<div aria-hidden="true" data-placeholder-image="" style="opacity:1;transition:opacity 500ms linear">
</div>
<img alt="Image of multiple key string sequence." data-main-image="" decoding="async" height="281" loading="lazy" sizes="(min-width: 600px) 600px, 100vw" src="/docs/manual/static/228daf2e80628352b31a5d97da66f302/c4d62/example-multiple-keys2.webp" srcset="/docs/manual/static/228daf2e80628352b31a5d97da66f302/d4af4/example-multiple-keys2.webp 150w,/docs/manual/static/228daf2e80628352b31a5d97da66f302/284a6/example-multiple-keys2.webp 300w,/docs/manual/static/228daf2e80628352b31a5d97da66f302/c4d62/example-multiple-keys2.webp 600w" style="--border-color:#C1C7C6;opacity:0" width="600"/>
<noscript>
<img alt="Image of multiple key string sequence." data-gatsby-image-ssr="" data-main-image="" decoding="async" height="281" loading="lazy" sizes="(min-width: 600px) 600px, 100vw" src="/docs/manual/static/228daf2e80628352b31a5d97da66f302/c4d62/example-multiple-keys2.webp" srcset="/docs/manual/static/228daf2e80628352b31a5d97da66f302/d4af4/example-multiple-keys2.webp 150w,/docs/manual/static/228daf2e80628352b31a5d97da66f302/284a6/example-multiple-keys2.webp 300w,/docs/manual/static/228daf2e80628352b31a5d97da66f302/c4d62/example-multiple-keys2.webp 600w" style="--border-color:#C1C7C6;opacity:0" width="600"/>
</noscript>
<script type="module">
const t="undefined"!=typeof HTMLImageElement&&"loading"in HTMLImageElement.prototype;if(t){const t=document.querySelectorAll("img[data-main-image]");for(let e of t){e.dataset.src&&(e.setAttribute("src",e.dataset.src),e.removeAttribute("data-src")),e.dataset.srcset&&(e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset"));const t=e.parentNode.querySelectorAll("source[data-srcset]");for(let e of t)e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset");e.complete&&(e.style.opacity=1,e.parentNode.parentNode.querySelector("[data-placeholder-image]").style.opacity=0)}}
</script>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
2. Restart Each Member
<a class="headerlink leafygreen-ui-1kepx47" href="#2.-restart-each-member" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="2.-restart-each-member">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Once all the keyfiles contain both the old and new keys, restart each
member one at a time.
</p>
<p class="leafygreen-ui-1kp3ins">
<strong>
For each secondary member
</strong>
, connect
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
to the
member and:
</p>
<ol class="leafygreen-ui-rioki0" type="a">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.shutdownServer/#mongodb-method-db.shutdownServer">
<code class="leafygreen-ui-1l06pbn">
db.shutdownServer()
</code>
</a>
method to shut down the member:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"use admin\ndb.shutdownServer()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">use admin</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">shutdownServer</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Restart the member.
</p>
</li>
</ol>
<p class="leafygreen-ui-1kp3ins">
<strong>
For the primary
</strong>
, connect
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
to the member and
</p>
<ol class="leafygreen-ui-rioki0" type="a">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/rs.stepDown/#mongodb-method-rs.stepDown">
<code class="leafygreen-ui-1l06pbn">
rs.stepDown()
</code>
</a>
to step down the member:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"rs.stepDown()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">rs.<span class="lg-highlight-title lg-highlight-function">stepDown</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.shutdownServer/#mongodb-method-db.shutdownServer">
<code class="leafygreen-ui-1l06pbn">
db.shutdownServer()
</code>
</a>
method to shut down the member:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"use admin\ndb.shutdownServer()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">use admin</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">shutdownServer</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Restart the member.
</p>
</li>
</ol>
<p class="leafygreen-ui-1kp3ins">
Since the keyfiles contains both the old and new keys, all members can
now accept either keys for membership authentication.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
3. Update Keyfile Content to the New Key Only
<a class="headerlink leafygreen-ui-1kepx47" href="#3.-update-keyfile-content-to-the-new-key-only" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="3.-update-keyfile-content-to-the-new-key-only">
</div>
</a>
</h3>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The example keys in this tutorial are for illustrative purposes
only. Do
<strong class="css-4dei7l">
NOT
</strong>
use for your deployment. Instead, generate a
keyfile using any method you choose (e.g.
<code class="leafygreen-ui-1l06pbn">
openssl rand -base64
756
</code>
, etc.).
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Modify each member's keyfile to include only the new password.
</p>
<div class="figure css-5vkxs0" style="width:558px">
<div class="gatsby-image-wrapper gatsby-image-wrapper-constrained leafygreen-ui-12xaq6r" data-gatsby-image-wrapper="">
<div style="max-width:568px;display:block">
<img alt="" aria-hidden="true" role="presentation" src="data:image/svg+xml;charset=utf-8,%3Csvg%20height='134'%20width='568'%20xmlns='http://www.w3.org/2000/svg'%20version='1.1'%3E%3C/svg%3E" style="max-width:100%;display:block;position:static"/>
</div>
<div aria-hidden="true" data-placeholder-image="" style="opacity: 0; transition: opacity 500ms linear;">
</div>
<img alt="Image of new key." data-main-image="" decoding="async" height="134" loading="lazy" sizes="(min-width: 568px) 568px, 100vw" src="/docs/manual/static/f7cb9450fb37ad6000e5155fe8e7fa99/6c107/example-key2.webp" srcset="/docs/manual/static/f7cb9450fb37ad6000e5155fe8e7fa99/e95b3/example-key2.webp 142w,/docs/manual/static/f7cb9450fb37ad6000e5155fe8e7fa99/50690/example-key2.webp 284w,/docs/manual/static/f7cb9450fb37ad6000e5155fe8e7fa99/6c107/example-key2.webp 568w" style="--border-color: #C1C7C6; opacity: 1;" width="568"/>
<noscript>
<img alt="Image of new key." data-gatsby-image-ssr="" data-main-image="" decoding="async" height="134" loading="lazy" sizes="(min-width: 568px) 568px, 100vw" src="/docs/manual/static/f7cb9450fb37ad6000e5155fe8e7fa99/6c107/example-key2.webp" srcset="/docs/manual/static/f7cb9450fb37ad6000e5155fe8e7fa99/e95b3/example-key2.webp 142w,/docs/manual/static/f7cb9450fb37ad6000e5155fe8e7fa99/50690/example-key2.webp 284w,/docs/manual/static/f7cb9450fb37ad6000e5155fe8e7fa99/6c107/example-key2.webp 568w" style="--border-color:#C1C7C6;opacity:0" width="568"/>
</noscript>
<script type="module">
const t="undefined"!=typeof HTMLImageElement&&"loading"in HTMLImageElement.prototype;if(t){const t=document.querySelectorAll("img[data-main-image]");for(let e of t){e.dataset.src&&(e.setAttribute("src",e.dataset.src),e.removeAttribute("data-src")),e.dataset.srcset&&(e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset"));const t=e.parentNode.querySelectorAll("source[data-srcset]");for(let e of t)e.setAttribute("srcset",e.dataset.srcset),e.removeAttribute("data-srcset");e.complete&&(e.style.opacity=1,e.parentNode.parentNode.querySelector("[data-placeholder-image]").style.opacity=0)}}
</script>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
4. Restart Each Member
<a class="headerlink leafygreen-ui-1kepx47" href="#4.-restart-each-member" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="4.-restart-each-member">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Once all the keyfiles contain the new key only, restart each member one
at a time.
</p>
<p class="leafygreen-ui-1kp3ins">
<strong>
For each secondary member
</strong>
, connect
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
to the
member and:
</p>
<ol class="leafygreen-ui-rioki0" type="a">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.shutdownServer/#mongodb-method-db.shutdownServer">
<code class="leafygreen-ui-1l06pbn">
db.shutdownServer()
</code>
</a>
method to shut down the member:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"use admin\ndb.shutdownServer()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">use admin</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">shutdownServer</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Restart the member.
</p>
</li>
</ol>
<p class="leafygreen-ui-1kp3ins">
<strong>
For the primary
</strong>
, connect
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
to the member and
</p>
<ol class="leafygreen-ui-rioki0" type="a">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/rs.stepDown/#mongodb-method-rs.stepDown">
<code class="leafygreen-ui-1l06pbn">
rs.stepDown()
</code>
</a>
to step down the member:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"rs.stepDown()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">rs.<span class="lg-highlight-title lg-highlight-function">stepDown</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.shutdownServer/#mongodb-method-db.shutdownServer">
<code class="leafygreen-ui-1l06pbn">
db.shutdownServer()
</code>
</a>
method to shut down the member:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"use admin\ndb.shutdownServer()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">use admin</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">shutdownServer</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Restart the member.
</p>
</li>
</ol>
<p class="leafygreen-ui-1kp3ins">
All members now accept only the new key for membership authentication.
</p>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/schema-validation/view-existing-validation-rules/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
View Existing Validation Rules
<a class="headerlink leafygreen-ui-1kepx47" href="#view-existing-validation-rules" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="view-existing-validation-rules">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#prerequisite" target="_self">
<span>
Prerequisite
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example--db.getcollectioninfos---syntax" target="_self">
<span>
Example:
<code class="css-1kekw28 e1wawog0">
db.getCollectionInfos()
</code>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example--listcollections-syntax" target="_self">
<span>
Example:
<code class="css-1kekw28 e1wawog0">
listCollections
</code>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#learn-more" target="_self">
<span>
Learn More
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
You can view a collection's validation rules to determine what
restrictions are imposed on documents and how MongoDB handles invalid
documents when they occur.
</p>
<p class="leafygreen-ui-1kp3ins">
To view a collection's validation rules, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.getCollectionInfos/#mongodb-method-db.getCollectionInfos">
<code class="leafygreen-ui-1l06pbn">
db.getCollectionInfos()
</code>
</a>
method or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/listCollections/#mongodb-dbcommand-dbcmd.listCollections">
<code class="leafygreen-ui-1l06pbn">
listCollections
</code>
</a>
database command.
</p>
<p class="leafygreen-ui-1kp3ins">
Both commands return the same information, but the output format differs
between each command.
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Prerequisite
<a class="headerlink leafygreen-ui-1kepx47" href="#prerequisite" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="prerequisite">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To run the examples on this page, create a
<code class="leafygreen-ui-1l06pbn">
students
</code>
collection with
validation rules. For more information, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/schema-validation/specify-json-schema/#std-label-schema-validation-json">
Specify JSON Schema Validation
<!-- -->
.
</a>
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example:
<code class="leafygreen-ui-1l06pbn">
db.getCollectionInfos()
</code>
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#example--db.getcollectioninfos---syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example--db.getcollectioninfos---syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following command uses
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.getCollectionInfos/#mongodb-method-db.getCollectionInfos">
<code class="leafygreen-ui-1l06pbn">
db.getCollectionInfos()
</code>
</a>
to return
the validation rules for the
<code class="leafygreen-ui-1l06pbn">
students
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.getCollectionInfos( { name: \"students\" } )[0].options.validator","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">getCollectionInfos</span>( <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"students"</span> } )<!-- -->[<span class="lg-highlight-number">0</span>].<span class="lg-highlight-property">options</span>.<span class="lg-highlight-property">validator</span></td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The output resembles the following validation object:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n '$jsonSchema': {\n bsonType: 'object',\n required: [ 'name', 'year', 'major', 'address' ],\n properties: {\n name: {\n bsonType: 'string',\n description: 'must be a string and is required'\n },\n year: {\n bsonType: 'int',\n minimum: 2017,\n maximum: 3017,\n description: 'must be an integer in [ 2017, 3017 ] and is required'\n },\n gpa: {\n bsonType: [ 'double' ],\n description: 'must be a double if the field exists'\n }\n }\n }\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'$jsonSchema'</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">bsonType</span>: <span class="lg-highlight-string">'object'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">required</span>: <!-- -->[ <span class="lg-highlight-string">'name'</span>, <span class="lg-highlight-string">'year'</span>, <span class="lg-highlight-string">'major'</span>, <span class="lg-highlight-string">'address'</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">properties</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">bsonType</span>: <span class="lg-highlight-string">'string'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">description</span>: <span class="lg-highlight-string">'must be a string and is required'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">year</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">bsonType</span>: <span class="lg-highlight-string">'int'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">minimum</span>: <span class="lg-highlight-number">2017</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">maximum</span>: <span class="lg-highlight-number">3017</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">description</span>: <span class="lg-highlight-string">'must be an integer in [ 2017, 3017 ] and is required'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">gpa</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">bsonType</span>: <!-- -->[ <span class="lg-highlight-string">'double'</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">description</span>: <span class="lg-highlight-string">'must be a double if the field exists'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
Validation Action and Level Not Included by Default
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
validationAction
</code>
and
<code class="leafygreen-ui-1l06pbn">
validationLevel
</code>
are not explicitly
set,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.getCollectionInfos/#mongodb-method-db.getCollectionInfos">
<code class="leafygreen-ui-1l06pbn">
db.getCollectionInfos()
</code>
</a>
does not include those fields
in its output.
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example:
<code class="leafygreen-ui-1l06pbn">
listCollections
</code>
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#example--listcollections-syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example--listcollections-syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following command uses
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/listCollections/#mongodb-dbcommand-dbcmd.listCollections">
<code class="leafygreen-ui-1l06pbn">
listCollections
</code>
</a>
to return the
validation rules for the
<code class="leafygreen-ui-1l06pbn">
students
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand ( { listCollections: 1, filter: { name: \"students\" } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">runCommand</span> <!-- -->( <!-- -->{ <span class="lg-highlight-attr">listCollections</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">filter</span>: <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"students"</span> } } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The output resembles the following object:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n cursor: {\n id: Long(\"0\"),\n ns: 'test.$cmd.listCollections',\n firstBatch: [\n {\n name: 'students',\n type: 'collection',\n options: {\n validator: {\n '$jsonSchema': {\n bsonType: 'object',\n required: [ 'name', 'year', 'major', 'address' ],\n properties: {\n name: {\n bsonType: 'string',\n description: 'must be a string and is required'\n },\n gpa: {\n bsonType: [ 'double' ],\n description: 'must be a double if the field exists'\n }\n }\n },\n validationAction: 'warn'\n }\n },\n info: {\n readOnly: false,\n uuid: UUID(\"bf560865-5879-4ec1-b389-f77a03abbc5a\")\n },\n idIndex: { v: 2, key: { _id: 1 }, name: '_id_' }\n }\n ]\n },\n ok: 1\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">cursor</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">id</span>: <span class="lg-highlight-title lg-highlight-class">Long</span>(<span class="lg-highlight-string">"0"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">ns</span>: <span class="lg-highlight-string">'test.$cmd.listCollections'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">firstBatch</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'students'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">'collection'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">options</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">validator</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">'$jsonSchema'</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">bsonType</span>: <span class="lg-highlight-string">'object'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">required</span>: <!-- -->[ <span class="lg-highlight-string">'name'</span>, <span class="lg-highlight-string">'year'</span>, <span class="lg-highlight-string">'major'</span>, <span class="lg-highlight-string">'address'</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">properties</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">name</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">bsonType</span>: <span class="lg-highlight-string">'string'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">description</span>: <span class="lg-highlight-string">'must be a string and is required'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">gpa</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">bsonType</span>: <!-- -->[ <span class="lg-highlight-string">'double'</span> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">description</span>: <span class="lg-highlight-string">'must be a double if the field exists'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">validationAction</span>: <span class="lg-highlight-string">'warn'</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">info</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">readOnly</span>: <span class="lg-highlight-literal">false</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">uuid</span>: <span class="lg-highlight-title lg-highlight-function">UUID</span>(<span class="lg-highlight-string">"bf560865-5879-4ec1-b389-f77a03abbc5a"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">idIndex</span>: <!-- -->{ <span class="lg-highlight-attr">v</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">key</span>: <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span> }<!-- -->, <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'_id_'</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">ok</span>: <span class="lg-highlight-number">1</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Learn More
<a class="headerlink leafygreen-ui-1kepx47" href="#learn-more" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="learn-more">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/schema-validation/use-json-schema-query-conditions/#std-label-use-json-schema-query-conditions">
Query for and Modify Valid or Invalid Documents
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/schema-validation/handle-invalid-documents/#std-label-schema-validation-handle-invalid-docs">
Choose How to Handle Invalid Documents
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/update/pull/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$pull
<a class="headerlink leafygreen-ui-1kepx47" href="#-pull" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-pull">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<dl class="update">
<dt>
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-update-up.-pull" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-update-up.-pull">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-pull" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
</span>
</a>
operator removes from an existing array all
instances of a value or values that match a specified condition.
</p>
</dd>
</dl>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can use
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
for deployments hosted in the following
environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-pull" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
</span>
</a>
operator has the following form:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $pull: { <field1>: <value|condition>, <field2>: <value|condition>, ... } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$pull</span>: { <field1>: <value|condition>, <field2>: <value|condition>, ... } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To specify a
<code class="leafygreen-ui-1l06pbn">
<field>
</code>
in an embedded document or in an array, use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/document/#std-label-document-dot-notation">
dot notation.
</a>
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0, update operators process document fields with
string-based names in lexicographic order. Fields with numeric names are
processed in numeric order. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/#std-label-update-operators-processing-order">
Update Operators Behavior
</a>
for details.
</p>
<p class="leafygreen-ui-1kp3ins">
If you specify a
<code class="leafygreen-ui-1l06pbn">
<condition>
</code>
and the array elements are embedded
documents,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-pull" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
</span>
</a>
operator applies the
<code class="leafygreen-ui-1l06pbn">
<condition>
</code>
as if each
array element were a document in a collection. See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-pull-array-of-documents" target="_self">
<span>
Remove All Items That Match a Specified
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
Condition With
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.bulkWrite/#mongodb-method-db.collection.bulkWrite">
<code class="leafygreen-ui-1l06pbn">
bulkWrite()
</code>
</a>
</span>
</a>
for an example.
</p>
<p class="leafygreen-ui-1kp3ins">
If the specified
<code class="leafygreen-ui-1l06pbn">
<value>
</code>
to remove is an array,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-pull" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
</span>
</a>
removes only the elements in the array that match the specified
<code class="leafygreen-ui-1l06pbn">
<value>
</code>
exactly, including order.
</p>
<p class="leafygreen-ui-1kp3ins">
If the specified
<code class="leafygreen-ui-1l06pbn">
<value>
</code>
to remove is a document,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-pull" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
</span>
</a>
removes only the elements in the array that have the exact same fields
and values. The ordering of the fields can differ.
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
no longer raises an
error when you use an update operator like
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-pull" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
</span>
</a>
with an empty operand expression (
<code class="leafygreen-ui-1l06pbn">
{ }
</code>
). An empty update results
in no changes and no
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-oplog">
oplog
</a>
entry is created (meaning that the
operation is a no-op).
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Remove All Items That Equal a Specified Value
<a class="headerlink leafygreen-ui-1kepx47" href="#remove-all-items-that-equal-a-specified-value" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="remove-all-items-that-equal-a-specified-value">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Create the
<code class="leafygreen-ui-1l06pbn">
stores
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.stores.insertMany( [\n {\n _id: 1,\n fruits: [ \"apples\", \"pears\", \"oranges\", \"grapes\", \"bananas\" ],\n vegetables: [ \"carrots\", \"celery\", \"squash\", \"carrots\" ]\n },\n {\n _id: 2,\n fruits: [ \"plums\", \"kiwis\", \"oranges\", \"bananas\", \"apples\" ],\n vegetables: [ \"broccoli\", \"zucchini\", \"carrots\", \"onions\" ]\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">stores</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fruits</span>: [ <span class="lg-highlight-string">"apples"</span>, <span class="lg-highlight-string">"pears"</span>, <span class="lg-highlight-string">"oranges"</span>, <span class="lg-highlight-string">"grapes"</span>, <span class="lg-highlight-string">"bananas"</span> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">vegetables</span>: [ <span class="lg-highlight-string">"carrots"</span>, <span class="lg-highlight-string">"celery"</span>, <span class="lg-highlight-string">"squash"</span>, <span class="lg-highlight-string">"carrots"</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fruits</span>: [ <span class="lg-highlight-string">"plums"</span>, <span class="lg-highlight-string">"kiwis"</span>, <span class="lg-highlight-string">"oranges"</span>, <span class="lg-highlight-string">"bananas"</span>, <span class="lg-highlight-string">"apples"</span> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">vegetables</span>: [ <span class="lg-highlight-string">"broccoli"</span>, <span class="lg-highlight-string">"zucchini"</span>, <span class="lg-highlight-string">"carrots"</span>, <span class="lg-highlight-string">"onions"</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following operation removes
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"apples"
</code>
and
<code class="leafygreen-ui-1l06pbn">
"oranges"
</code>
from the
<code class="leafygreen-ui-1l06pbn">
fruits
</code>
array
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"carrots"
</code>
from the
<code class="leafygreen-ui-1l06pbn">
vegetables
</code>
array
</p>
</li>
</ul>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.stores.updateMany(\n { },\n { $pull: { fruits: { $in: [ \"apples\", \"oranges\" ] }, vegetables: \"carrots\" } }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">stores</span>.<span class="lg-highlight-title lg-highlight-function">updateMany</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-attr">$pull</span>: { <span class="lg-highlight-attr">fruits</span>: { <span class="lg-highlight-attr">$in</span>: [ <span class="lg-highlight-string">"apples"</span>, <span class="lg-highlight-string">"oranges"</span> ] }, <span class="lg-highlight-attr">vegetables</span>: <span class="lg-highlight-string">"carrots"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Confirm the result with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
db.collection.find()
</code>
:
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n _id: 1,\n fruits: [ 'pears', 'grapes', 'bananas' ],\n vegetables: [ 'celery', 'squash' ]\n},\n{\n _id: 2,\n fruits: [ 'plums', 'kiwis', 'bananas' ],\n vegetables: [ 'broccoli', 'zucchini', 'onions' ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fruits</span>: [ <span class="lg-highlight-string">'pears'</span>, <span class="lg-highlight-string">'grapes'</span>, <span class="lg-highlight-string">'bananas'</span> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">vegetables</span>: [ <span class="lg-highlight-string">'celery'</span>, <span class="lg-highlight-string">'squash'</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">fruits</span>: [ <span class="lg-highlight-string">'plums'</span>, <span class="lg-highlight-string">'kiwis'</span>, <span class="lg-highlight-string">'bananas'</span> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">vegetables</span>: [ <span class="lg-highlight-string">'broccoli'</span>, <span class="lg-highlight-string">'zucchini'</span>, <span class="lg-highlight-string">'onions'</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Remove All Items That Match a Specified
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
Condition
<a class="headerlink leafygreen-ui-1kepx47" href="#remove-all-items-that-match-a-specified--pull-condition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="remove-all-items-that-match-a-specified--pull-condition">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Create the
<code class="leafygreen-ui-1l06pbn">
profiles
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.profiles.insertOne( { _id: 1, votes: [ 3, 5, 6, 7, 7, 8 ] } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">profiles</span>.<span class="lg-highlight-title lg-highlight-function">insertOne</span>( { <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">votes</span>: [ <span class="lg-highlight-number">3</span>, <span class="lg-highlight-number">5</span>, <span class="lg-highlight-number">6</span>, <span class="lg-highlight-number">7</span>, <span class="lg-highlight-number">7</span>, <span class="lg-highlight-number">8</span> ] } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following operation will remove all items from the
<code class="leafygreen-ui-1l06pbn">
votes
</code>
array
that are greater than or equal to (
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/gte/#mongodb-query-op.-gte">
<code class="leafygreen-ui-1l06pbn">
$gte
</code>
</a>
)
<code class="leafygreen-ui-1l06pbn">
6
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.profiles.updateOne( { _id: 1 }, { $pull: { votes: { $gte: 6 } } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">profiles</span>.<span class="lg-highlight-title lg-highlight-function">updateOne</span>( { <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span> }, { <span class="lg-highlight-attr">$pull</span>: { <span class="lg-highlight-attr">votes</span>: { <span class="lg-highlight-attr">$gte</span>: <span class="lg-highlight-number">6</span> } } } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
After the update operation, the document only has values less than 6:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ _id: 1, votes: [ 3, 5 ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">votes</span>: [ <span class="lg-highlight-number">3</span>, <span class="lg-highlight-number">5</span> ] }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-pull-array-of-documents">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Remove All Items That Match a Specified
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
Condition With
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.bulkWrite/#mongodb-method-db.collection.bulkWrite">
<code class="leafygreen-ui-1l06pbn">
bulkWrite()
</code>
</a>
<a class="headerlink leafygreen-ui-1kepx47" href="#remove-all-items-that-match-a-specified--pull-condition-with" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="remove-all-items-that-match-a-specified--pull-condition-with">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.bulkWrite/#mongodb-method-db.collection.bulkWrite">
<code class="leafygreen-ui-1l06pbn">
db.collection.bulkWrite()
</code>
</a>
operation:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Creates the
<code class="leafygreen-ui-1l06pbn">
profilesBulkWrite
</code>
collection.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Removes all items from the
<code class="leafygreen-ui-1l06pbn">
votes
</code>
array
that are greater than or equal to (
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/gte/#mongodb-query-op.-gte">
<code class="leafygreen-ui-1l06pbn">
$gte
</code>
</a>
)
<code class="leafygreen-ui-1l06pbn">
6
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Removes all items from the
<code class="leafygreen-ui-1l06pbn">
votes
</code>
array
that are less than or equal to (
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/lte/#mongodb-query-op.-lte">
<code class="leafygreen-ui-1l06pbn">
$lte
</code>
</a>
)
<code class="leafygreen-ui-1l06pbn">
3
</code>
.
</p>
</li>
</ul>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"try {\n db.profilesBulkWrite.bulkWrite( [\n {\n insertOne: {\n \"document\": { _id: 1, votes: [ 3, 5, 6, 7, 7, 8 ] }\n }\n },\n {\n updateOne: {\n \"filter\": { _id: 1 },\n \"update\": { $pull: { votes: { $gte: 6 } } }\n }\n },\n {\n updateOne: {\n \"filter\": {_id: 1},\n \"update\": { $pull: { votes: { $lte: 3 } } }\n }\n }\n ] );\n} catch (e) {\n print(e);\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">try</span> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db.<span class="lg-highlight-property">profilesBulkWrite</span>.<span class="lg-highlight-title lg-highlight-function">bulkWrite</span>( [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">insertOne</span>: {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"document"</span>: { <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">votes</span>: [ <span class="lg-highlight-number">3</span>, <span class="lg-highlight-number">5</span>, <span class="lg-highlight-number">6</span>, <span class="lg-highlight-number">7</span>, <span class="lg-highlight-number">7</span>, <span class="lg-highlight-number">8</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updateOne</span>: {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"filter"</span>: { <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"update"</span>: { <span class="lg-highlight-attr">$pull</span>: { <span class="lg-highlight-attr">votes</span>: { <span class="lg-highlight-attr">$gte</span>: <span class="lg-highlight-number">6</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updateOne</span>: {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"filter"</span>: {<span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>},</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"update"</span>: { <span class="lg-highlight-attr">$pull</span>: { <span class="lg-highlight-attr">votes</span>: { <span class="lg-highlight-attr">$lte</span>: <span class="lg-highlight-number">3</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ] );</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} <span class="lg-highlight-keyword">catch</span> (e) {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-function">print</span>(e);</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
bulkWrite()
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.bulkWrite/#mongodb-method-db.collection.bulkWrite">
<code class="leafygreen-ui-1l06pbn">
db.collection.bulkWrite()
</code>
</a>
method executes multiple
write operations listed in an array. In this example, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.bulkWrite/#mongodb-method-db.collection.bulkWrite">
<code class="leafygreen-ui-1l06pbn">
db.collection.bulkWrite()
</code>
</a>
performs multiple operations
on the
<code class="leafygreen-ui-1l06pbn">
profiles
</code>
collection.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
After the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.bulkWrite/#mongodb-method-db.collection.bulkWrite">
<code class="leafygreen-ui-1l06pbn">
db.collection.bulkWrite()
</code>
</a>
operation,
you can confirm the document only has values less than
6 and greater than 3 using the following
operation:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.profilesBulkWrite.find()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">profilesBulkWrite</span>.<span class="lg-highlight-title lg-highlight-function">find</span>()</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[ { _id: 1, votes: [ 5 ] } ]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[ { <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">votes</span>: [ <span class="lg-highlight-number">5</span> ] } ]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Remove Items from an Array of Documents
<a class="headerlink leafygreen-ui-1kepx47" href="#remove-items-from-an-array-of-documents" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="remove-items-from-an-array-of-documents">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Create the
<code class="leafygreen-ui-1l06pbn">
survey
</code>
collection:
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-ex-create-survey-collection">
</span>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.survey.insertMany([\n {\n _id: 1,\n results: [\n { item: \"A\", score: 5 },\n { item: \"B\", score: 8 }\n ]\n },\n {\n _id: 2,\n results: [\n { item: \"C\", score: 8 },\n { item: \"B\", score: 4 }\n ]\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">survey</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>([</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">results</span>: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">5</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"B"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">8</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">results</span>: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"C"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">8</span> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"B"</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">4</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following operation removes all elements from the
<code class="leafygreen-ui-1l06pbn">
results
</code>
array
that contain both a
<code class="leafygreen-ui-1l06pbn">
score
</code>
field equal to
<code class="leafygreen-ui-1l06pbn">
8
</code>
and an
<code class="leafygreen-ui-1l06pbn">
item
</code>
field equal to
<code class="leafygreen-ui-1l06pbn">
"B"
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.survey.updateMany(\n { },\n { $pull: { results: { score: 8 , item: \"B\" } } }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">survey</span>.<span class="lg-highlight-title lg-highlight-function">updateMany</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-attr">$pull</span>: { <span class="lg-highlight-attr">results</span>: { <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">8</span> , <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"B"</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-pull" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
</span>
</a>
expression applies the condition to each element of
the
<code class="leafygreen-ui-1l06pbn">
results
</code>
array as though it were a top-level document.
</p>
<p class="leafygreen-ui-1kp3ins">
After the operation, the
<code class="leafygreen-ui-1l06pbn">
results
</code>
array contains no documents that
contain both a
<code class="leafygreen-ui-1l06pbn">
score
</code>
field equal to
<code class="leafygreen-ui-1l06pbn">
8
</code>
and an
<code class="leafygreen-ui-1l06pbn">
item
</code>
field
equal to
<code class="leafygreen-ui-1l06pbn">
"B"
</code>
.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ _id: 1, results: [ { item: 'A', score: 5 } ] },\n{\n _id: 2,\n results: [ { item: 'C', score: 8 }, { item: 'B', score: 4 } ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">results</span>: [ { <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'A'</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">5</span> } ] },</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">results</span>: [ { <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'C'</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">8</span> }, { <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'B'</span>, <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">4</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-pull" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
</span>
</a>
operator treats each element as a top-level object.
The query is applied to each element. The expression does not need to
use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/elemMatch/#mongodb-query-op.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
</a>
to specify match conditions.
</p>
<p class="leafygreen-ui-1kp3ins">
On the contrary, the following operation does not
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-pull" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
</span>
</a>
any
elements from the original collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.survey.updateMany(\n { },\n { $pull: { results: { $elemMatch: { score: 8 , item: \"B\" } } } }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">survey</span>.<span class="lg-highlight-title lg-highlight-function">updateMany</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { <span class="lg-highlight-attr">$pull</span>: { <span class="lg-highlight-attr">results</span>: { <span class="lg-highlight-attr">$elemMatch</span>: { <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">8</span> , <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"B"</span> } } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Drop the
<code class="leafygreen-ui-1l06pbn">
survey
</code>
collection with:
</p>
<p class="leafygreen-ui-1kp3ins">
Then
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-ex-create-survey-collection" target="_self">
<span>
recreate it
</span>
</a>
to run this
example.
</p>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Remove Documents from Nested Arrays
<a class="headerlink leafygreen-ui-1kepx47" href="#remove-documents-from-nested-arrays" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="remove-documents-from-nested-arrays">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Create a new
<code class="leafygreen-ui-1l06pbn">
survey
</code>
collection with documents that are embedded in
nested arrays.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.survey.drop()\n\ndb.survey.insertMany( [\n {\n _id: 1,\n results: [\n {\n item: \"A\",\n score: 5,\n answers: [ { q: 1, a: 4 }, { q: 2, a: 6 } ]\n },\n {\n item: \"B\",\n score: 8,\n answers: [ { q: 1, a: 8 }, { q: 2, a: 9 } ]\n }\n ]\n },\n {\n _id: 2,\n results: [\n {\n item: \"C\",\n score: 8,\n answers: [ { q: 1, a: 8 }, { q: 2, a: 7 } ]\n },\n {\n item: \"B\",\n score: 4,\n answers: [ { q: 1, a: 0 }, { q: 2, a: 8 } ]\n }\n ]\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">survey</span>.<span class="lg-highlight-title lg-highlight-function">drop</span>()</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">survey</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">results</span>: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"A"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">5</span>,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">answers</span>: [ { <span class="lg-highlight-attr">q</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">a</span>: <span class="lg-highlight-number">4</span> }, { <span class="lg-highlight-attr">q</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">a</span>: <span class="lg-highlight-number">6</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"B"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">8</span>,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">answers</span>: [ { <span class="lg-highlight-attr">q</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">a</span>: <span class="lg-highlight-number">8</span> }, { <span class="lg-highlight-attr">q</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">a</span>: <span class="lg-highlight-number">9</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">results</span>: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"C"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">8</span>,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">answers</span>: [ { <span class="lg-highlight-attr">q</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">a</span>: <span class="lg-highlight-number">8</span> }, { <span class="lg-highlight-attr">q</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">a</span>: <span class="lg-highlight-number">7</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">"B"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">4</span>,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">answers</span>: [ { <span class="lg-highlight-attr">q</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">a</span>: <span class="lg-highlight-number">0</span> }, { <span class="lg-highlight-attr">q</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">a</span>: <span class="lg-highlight-number">8</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Then you can specify multiple conditions on the elements of the
<code class="leafygreen-ui-1l06pbn">
answers
</code>
array with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/elemMatch/#mongodb-query-op.-elemMatch">
<code class="leafygreen-ui-1l06pbn">
$elemMatch
</code>
:
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.survey.updateMany(\n { },\n {\n $pull:\n {\n results:\n {\n answers: { $elemMatch: { q: 2, a: { $gte: 8 } } }\n }\n }\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">survey</span>.<span class="lg-highlight-title lg-highlight-function">updateMany</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$pull</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">results</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">answers</span>: { <span class="lg-highlight-attr">$elemMatch</span>: { <span class="lg-highlight-attr">q</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">a</span>: { <span class="lg-highlight-attr">$gte</span>: <span class="lg-highlight-number">8</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation updated the
<code class="leafygreen-ui-1l06pbn">
results
</code>
array in each document it
matched.
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.updateMany/#mongodb-method-db.collection.updateMany">
<code class="leafygreen-ui-1l06pbn">
db.collection.updateMany()
</code>
</a>
removed documents from
<code class="leafygreen-ui-1l06pbn">
results
</code>
when an element of the embedded
<code class="leafygreen-ui-1l06pbn">
answers
</code>
array matched
the selection conditions in the highlighted line.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n _id: 1,\n results: [\n {\n item: 'A',\n score: 5,\n answers: [ { q: 1, a: 4 }, { q: 2, a: 6 } ]\n }\n ]\n},\n{\n _id: 2,\n results: [\n {\n item: 'C',\n score: 8,\n answers: [ { q: 1, a: 8 }, { q: 2, a: 7 } ]\n }\n ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">results</span>: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'A'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">5</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">answers</span>: [ { <span class="lg-highlight-attr">q</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">a</span>: <span class="lg-highlight-number">4</span> }, { <span class="lg-highlight-attr">q</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">a</span>: <span class="lg-highlight-number">6</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">},</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">results</span>: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'C'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">8</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">answers</span>: [ { <span class="lg-highlight-attr">q</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">a</span>: <span class="lg-highlight-number">8</span> }, { <span class="lg-highlight-attr">q</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">a</span>: <span class="lg-highlight-number">7</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.updateMany/#mongodb-method-db.collection.updateMany">
<code class="leafygreen-ui-1l06pbn">
db.collection.updateMany()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.findAndModify/#mongodb-method-db.collection.findAndModify">
<code class="leafygreen-ui-1l06pbn">
db.collection.findAndModify()
</code>
</a>
</p>
</li>
</ul>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/change-events/modify/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
<code class="leafygreen-ui-1l06pbn">
modify
</code>
Event
<a class="headerlink leafygreen-ui-1kepx47" href="#modify-event" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="modify-event">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#summary" target="_self">
<span>
Summary
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#description" target="_self">
<span>
Description
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Summary
<a class="headerlink leafygreen-ui-1kepx47" href="#summary" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="summary">
</div>
</a>
</h2>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
modify
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-modify" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-modify">
</div>
</a>
</dt>
<dd>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
A
<code class="leafygreen-ui-1l06pbn">
modify
</code>
event occurs when a collection is modified, such as when the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collMod/#mongodb-dbcommand-dbcmd.collMod">
<code class="leafygreen-ui-1l06pbn">
collMod
</code>
</a>
command adds or remove options from a collection or
view. This event is received only if the change stream has the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/change-events/#std-label-change-streams-expanded-events">
showExpandedEvents
</a>
option
set to
<code class="leafygreen-ui-1l06pbn">
true
</code>
.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
Disambiguation
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
To learn more about events that occur when individual documents are
updated, see the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/change-events/update/#mongodb-data-update">
<code class="leafygreen-ui-1l06pbn">
update
</code>
</a>
event.
</p>
</div>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Description
<a class="headerlink leafygreen-ui-1kepx47" href="#description" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="description">
</div>
</a>
</h2>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:60%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
_id
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--id">
</span>
<p class="leafygreen-ui-1kp3ins">
A
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-BSON">
BSON
</a>
object which serves as an identifier for the
change stream event. This value is used as the
<code class="leafygreen-ui-1l06pbn">
resumeToken
</code>
for the
<code class="leafygreen-ui-1l06pbn">
resumeAfter
</code>
parameter when resuming a change stream.
The
<code class="leafygreen-ui-1l06pbn">
_id
</code>
object has the following form:
</p>
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<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> "_data" : <BinData|hex string></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
_data
</code>
type depends on the MongoDB versions
and, in some cases, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/setFeatureCompatibilityVersion/#std-label-view-fcv">
feature compatibility version (fCV)
</a>
at the time of the change stream's
opening or resumption. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/changeStreams/#std-label-change-stream-resume-token">
Resume Tokens
</a>
for the
full list of
<code class="leafygreen-ui-1l06pbn">
_data
</code>
types.
</p>
<p class="leafygreen-ui-1kp3ins">
For an example of resuming a change stream by
<code class="leafygreen-ui-1l06pbn">
resumeToken
</code>
, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/changeStreams/#std-label-change-stream-resume">
Resume a Change Stream
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
clusterTime
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Timestamp
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--clusterTime">
</span>
<p class="leafygreen-ui-1kp3ins">
The timestamp from the oplog entry associated with the event.
</p>
<p class="leafygreen-ui-1kp3ins">
Change stream event notifications associated with a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions">
multi-document transaction
</a>
all have the same
<code class="leafygreen-ui-1l06pbn">
clusterTime
</code>
value: the time when the transaction
was committed.
</p>
<p class="leafygreen-ui-1kp3ins">
Events with the same
<code class="leafygreen-ui-1l06pbn">
clusterTime
</code>
may not all relate to the same transaction.
Some events don't relate to a transaction at all. Starting in MongoDB 8.0,
this may be true for events on any deployment. In previous versions, this
behavior was possible only for events on a sharded cluster.
</p>
<p class="leafygreen-ui-1kp3ins">
To identify events for a single transaction, you can use the
combination of
<code class="leafygreen-ui-1l06pbn">
lsid
</code>
and
<code class="leafygreen-ui-1l06pbn">
txnNumber
</code>
in the change stream
event document.
</p>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
8.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
collectionUUID
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
UUID
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--collectionUUID">
</span>
<p class="leafygreen-ui-1kp3ins">
If the change occurred on a collection,
<code class="leafygreen-ui-1l06pbn">
collectionUUID
</code>
indicates the
collection's
<span class="leafygreen-ui-vm4wms" tabindex="0">
UUID
</span>
. If the change
occurred on a view,
<code class="leafygreen-ui-1l06pbn">
collectionUUID
</code>
doesn't exist.
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
lsid
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--lsid">
</span>
<p class="leafygreen-ui-1kp3ins">
The identifier for the session associated with the transaction.
</p>
<p class="leafygreen-ui-1kp3ins">
Only present if the operation is part of a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/">
multi-document
transaction
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ns
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--ns">
</span>
<p class="leafygreen-ui-1kp3ins">
The namespace (database and or collection) affected by the event.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ns.db
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--ns.db">
</span>
<p class="leafygreen-ui-1kp3ins">
The name of the database where the event occurred.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ns.coll
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--ns.coll">
</span>
<p class="leafygreen-ui-1kp3ins">
The name of the collection where the event occurred.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
operationDescription
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--operationDescription">
</span>
<p class="leafygreen-ui-1kp3ins">
Additional information on the change operation.
</p>
<p class="leafygreen-ui-1kp3ins">
This document and its subfields only appears when the change stream uses
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/change-events/#std-label-change-streams-expanded-events">
expanded events
<!-- -->
.
</a>
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<code class="leafygreen-ui-1l06pbn">
operationDescription.
</code>
</div>
<div class="line">
<code class="leafygreen-ui-1l06pbn">
index
</code>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--od-index">
</span>
<p class="leafygreen-ui-1kp3ins">
The index that was modified.
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<code class="leafygreen-ui-1l06pbn">
operationDescription.
</code>
</div>
<div class="line">
<code class="leafygreen-ui-1l06pbn">
indexes
</code>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
An array of documents listing the indexes that were changed
by the operation.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
operationType
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--operationType">
</span>
<p class="leafygreen-ui-1kp3ins">
The type of operation that the change notification reports.
</p>
<p class="leafygreen-ui-1kp3ins">
Returns a value of
<code class="leafygreen-ui-1l06pbn">
modify
</code>
for these change events.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
stateBeforeChange
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--stateBeforeChange">
</span>
<p class="leafygreen-ui-1kp3ins">
Document shows collection and index options before the operation changed them.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<code class="leafygreen-ui-1l06pbn">
stateBeforeChange.
</code>
</div>
<div class="line">
<code class="leafygreen-ui-1l06pbn">
collectionOptions
</code>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--sbc.collectionOptions">
</span>
<p class="leafygreen-ui-1kp3ins">
Document shows collection options before the operation changed them.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<code class="leafygreen-ui-1l06pbn">
stateBeforeChange.
</code>
</div>
<div class="line">
<code class="leafygreen-ui-1l06pbn">
indexOptions
</code>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--sbc.indexOptions">
</span>
<p class="leafygreen-ui-1kp3ins">
Document shows index options before the operation changed them.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
txnNumber
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
NumberLong
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--txnNumber">
</span>
<p class="leafygreen-ui-1kp3ins">
Together with the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label--idref--lsid" target="_self">
<span>
lsid
</span>
</a>
, a number that helps uniquely
identify a transction.
</p>
<p class="leafygreen-ui-1kp3ins">
Only present if the operation is part of a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/">
multi-document
transaction
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
wallTime
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-ISODate">
ISODate
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label--idref--wallTime">
</span>
<p class="leafygreen-ui-1kp3ins">
The server date and time of the database operation.
<code class="leafygreen-ui-1l06pbn">
wallTime
</code>
differs from
<code class="leafygreen-ui-1l06pbn">
clusterTime
</code>
in that
<code class="leafygreen-ui-1l06pbn">
clusterTime
</code>
is a timestamp
taken from the oplog entry associated with the database operation
event.
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following example shows a
<code class="leafygreen-ui-1l06pbn">
modify
</code>
event:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\": { <resumetoken> },\n \"operationType\": \"modify\",\n \"clusterTime\": Timestamp({ t: 1654878543, i: 1 }),\n \"collectionUUID\": UUID(\"47d6baac-eeaa-488b-98ae-893f3abaaf25\"),\n \"wallTime\": ISODate(\"2022-06-10T16:29:03.704Z\"),\n \"ns\": {\n \"db\": \"test\",\n \"coll\": \"authors\" },\n \"operationDescription\": {\n \"index\": {\n \"name\": \"age_1\",\n \"hidden\": true\n }\n },\n \"stateBeforeChange\": {\n \"collectionOptions\": {\n \"uuid\": UUID(\"47d6baac-eeaa-488b-98ae-893f3abaaf25\")\n },\n \"indexOptions\": {\n \"hidden\": false\n }\n }\n}","programmingLanguage":"JSON"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light json leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"_id"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span> <ResumeToken> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"operationType"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"modify"</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"clusterTime"</span><span class="lg-highlight-punctuation">:</span> Timestamp(<span class="lg-highlight-punctuation">{</span> t<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-number">1654878543</span><span class="lg-highlight-punctuation">,</span> i<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-number">1</span> <span class="lg-highlight-punctuation">}</span>)<span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"collectionUUID"</span><span class="lg-highlight-punctuation">:</span> UUID(<span class="lg-highlight-string">"47d6baac-eeaa-488b-98ae-893f3abaaf25"</span>)<span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"wallTime"</span><span class="lg-highlight-punctuation">:</span> ISODate(<span class="lg-highlight-string">"2022-06-10T16:29:03.704Z"</span>)<span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"ns"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"db"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"test"</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"coll"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"authors"</span> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"operationDescription"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"index"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"name"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"age_1"</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"hidden"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-keyword">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"stateBeforeChange"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"collectionOptions"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"uuid"</span><span class="lg-highlight-punctuation">:</span> UUID(<span class="lg-highlight-string">"47d6baac-eeaa-488b-98ae-893f3abaaf25"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"indexOptions"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"hidden"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-keyword">false</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-punctuation">}</span></td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/db.updateRole/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
db.updateRole()
<a class="headerlink leafygreen-ui-1kepx47" href="#db.updaterole--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="db.updaterole--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#required-access" target="_self">
<span>
Required Access
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
db.updateRole( rolename, update, writeConcern )
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-db.updateRole" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-db.updateRole">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Updates a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/security-user-defined-roles/#std-label-user-defined-roles">
user-defined role
</a>
. The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.updateRole" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
db.updateRole()
</code>
</span>
</a>
method must run on the role's database.
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
mongosh Method
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This page documents a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
method. This is
<em>
not
</em>
the documentation for database commands or language-specific drivers,
such as Node.js.
</p>
<p class="leafygreen-ui-1kp3ins">
For the database command, see the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/updateRole/#mongodb-dbcommand-dbcmd.updateRole">
<code class="leafygreen-ui-1l06pbn">
updateRole
</code>
</a>
command
<!-- -->
.
</p>
<p class="leafygreen-ui-1kp3ins">
For MongoDB API drivers, refer to the language-specific
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
MongoDB driver documentation
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
An update to a field
<strong>
completely replaces
</strong>
the previous field's values.
To grant or remove roles or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/authorization/#std-label-privileges">
privileges
</a>
without
replacing all values, use one or more of the following methods:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.grantRolesToRole/#mongodb-method-db.grantRolesToRole">
<code class="leafygreen-ui-1l06pbn">
db.grantRolesToRole()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.grantPrivilegesToRole/#mongodb-method-db.grantPrivilegesToRole">
<code class="leafygreen-ui-1l06pbn">
db.grantPrivilegesToRole()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.revokeRolesFromRole/#mongodb-method-db.revokeRolesFromRole">
<code class="leafygreen-ui-1l06pbn">
db.revokeRolesFromRole()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.revokePrivilegesFromRole/#mongodb-method-db.revokePrivilegesFromRole">
<code class="leafygreen-ui-1l06pbn">
db.revokePrivilegesFromRole()
</code>
</a>
</p>
</li>
</ul>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
An update to the
<code class="leafygreen-ui-1l06pbn">
privileges
</code>
or
<code class="leafygreen-ui-1l06pbn">
roles
</code>
array completely replaces
the previous array's values.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.updateRole" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
db.updateRole()
</code>
</span>
</a>
method uses the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.updateRole(\n \"<rolename>\",\n {\n privileges:\n [\n { resource: { <resource> }, actions: [ \"<action>\", ... ] },\n ...\n ],\n roles:\n [\n { role: \"<role>\", db: \"<database>\" } | \"<role>\",\n ...\n ],\n authenticationRestrictions:\n [\n {\n clientSource: [\"<ip>\" | \"<cidr>\", ...],\n serverAddress: [\"<ip>\", | \"<cidr>\", ...]\n },\n ...\n ]\n },\n { <writeconcern> }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">updateRole</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"<rolename>"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">privileges</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">resource</span>: <!-- -->{ <<!-- -->resource<!-- -->> <!-- -->}<!-- -->, <span class="lg-highlight-attr">actions</span>: <!-- -->[ <span class="lg-highlight-string">"<action>"</span>, <!-- -->...<!-- --> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">roles</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">role</span>: <span class="lg-highlight-string">"<role>"</span>, <span class="lg-highlight-attr">db</span>: <span class="lg-highlight-string">"<database>"</span> } <!-- -->| <span class="lg-highlight-string">"<role>"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">authenticationRestrictions</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">clientSource</span>: <!-- -->[<span class="lg-highlight-string">"<IP>"</span> <!-- -->| <span class="lg-highlight-string">"<CIDR range>"</span>, <!-- -->...<!-- -->]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">serverAddress</span>: <!-- -->[<span class="lg-highlight-string">"<IP>"</span>, <!-- -->| <span class="lg-highlight-string">"<CIDR range>"</span>, <!-- -->...<!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <<!-- -->writeConcern<!-- -->> <!-- -->}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.updateRole" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
db.updateRole()
</code>
</span>
</a>
method accepts the following arguments:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Parameter
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
rolename
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The name of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/security-user-defined-roles/#std-label-user-defined-roles">
user-defined role
</a>
to update.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
A document containing the replacement data for the role. This
data completely replaces the corresponding data for the role.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
writeConcern
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. The level of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#std-label-write-concern">
write concern
</a>
for the
operation. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#std-label-wc-specs">
Write Concern Specification
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
update
</code>
document specifies the fields to update and the new
values. Each field in the
<code class="leafygreen-ui-1l06pbn">
update
</code>
document is optional, but the
document must include at least one field. The
<code class="leafygreen-ui-1l06pbn">
update
</code>
document has the
following fields:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
privileges
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Optional. Required if you do not specify
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-roles-collection/#mongodb-data-admin.system.roles.roles">
<code class="leafygreen-ui-1l06pbn">
roles
</code>
</a>
array.
The privileges to grant the role. An update to the
<code class="leafygreen-ui-1l06pbn">
privileges
</code>
array overrides the previous array's values. For the syntax for
specifying a privilege, see the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-roles-collection/#mongodb-data-admin.system.roles.privileges">
<code class="leafygreen-ui-1l06pbn">
privileges
</code>
</a>
array.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
roles
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Optional. Required if you do not specify
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-roles-collection/#mongodb-data-admin.system.roles.privileges">
<code class="leafygreen-ui-1l06pbn">
privileges
</code>
</a>
array.
The roles from which this role inherits privileges. An update to the
<code class="leafygreen-ui-1l06pbn">
roles
</code>
array overrides the previous array's values.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
authenticationRestrictions
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional.
</p>
<p class="leafygreen-ui-1kp3ins">
The authentication restrictions the server enforces on the role.
Specifies a list of IP addresses and
<span class="leafygreen-ui-vm4wms" tabindex="0">
CIDR
</span>
ranges users granted this
role are allowed to connect to and/or which they can connect from.
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.updateRole" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
db.updateRole()
</code>
</span>
</a>
method wraps the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/updateRole/#mongodb-dbcommand-dbcmd.updateRole">
<code class="leafygreen-ui-1l06pbn">
updateRole
</code>
</a>
command.
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This method is available in deployments hosted in the following environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This command is not supported in M0, M2, M5, and M10+ clusters.
For more information, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/" target="_self">
<span>
Unsupported Commands
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Roles
<a class="headerlink leafygreen-ui-1kepx47" href="#roles" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="roles">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
In the
<code class="leafygreen-ui-1l06pbn">
roles
</code>
field, you can specify both
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/built-in-roles/#std-label-built-in-roles">
built-in roles
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/security-user-defined-roles/#std-label-user-defined-roles">
user-defined
roles
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
To specify a role that exists in the same database where
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.updateRole" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
db.updateRole()
</code>
</span>
</a>
runs, you can either specify the role with the name of
the role:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"\"readWrite\"","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"readWrite"</span></td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Or you can specify the role with a document, as in:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ role: \"<role>\", db: \"<database>\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">role</span>: <span class="lg-highlight-string">"<role>"</span>, <span class="lg-highlight-attr">db</span>: <span class="lg-highlight-string">"<database>"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To specify a role that exists in a different database, specify the role
with a document.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Authentication Restrictions
<a class="headerlink leafygreen-ui-1kepx47" href="#authentication-restrictions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="authentication-restrictions">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
authenticationRestrictions
</code>
document can contain
<em>
only
</em>
the
following fields. The server throws an error if the
<code class="leafygreen-ui-1l06pbn">
authenticationRestrictions
</code>
document contains an unrecognized field:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:30%"/>
<col style="width:50%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field Name
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Value
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
clientSource
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Array of IP addresses and/or
<span class="leafygreen-ui-vm4wms" tabindex="0">
CIDR
</span>
ranges
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
If present, when authenticating a user, the server verifies
that the client's IP address is either in the given list or
belongs to a CIDR range in the list. If the client's IP address
is not present, the server does not authenticate the user.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
serverAddress
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Array of IP addresses and/or
<span class="leafygreen-ui-vm4wms" tabindex="0">
CIDR
</span>
ranges
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
A list of IP addresses or CIDR ranges to which the client can
connect. If present, the server will verify that the client's
connection was accepted via an IP address in the given list. If
the connection was accepted via an unrecognized IP address, the
server does not authenticate the user.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If a user inherits multiple roles with incompatible authentication
restrictions, that user becomes unusable.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, if a user inherits one role in which the
<code class="leafygreen-ui-1l06pbn">
clientSource
</code>
field is
<code class="leafygreen-ui-1l06pbn">
["198.51.100.0"]
</code>
and another role in
which the
<code class="leafygreen-ui-1l06pbn">
clientSource
</code>
field is
<code class="leafygreen-ui-1l06pbn">
["203.0.113.0"]
</code>
the server is
unable to authenticate the user.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For more information on authentication in MongoDB, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/authentication/#std-label-authentication">
Authentication on Self-Managed Deployments
<!-- -->
.
</a>
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Replica set
<a class="headerlink leafygreen-ui-1kepx47" href="#replica-set" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="replica-set">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If run on a replica set,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.updateRole" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
db.updateRole()
</code>
</span>
</a>
is executed using
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#mongodb-writeconcern-writeconcern.-majority-">
<code class="leafygreen-ui-1l06pbn">
"majority"
</code>
</a>
write concern by default.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Scope
<a class="headerlink leafygreen-ui-1kepx47" href="#scope" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="scope">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Except for roles created in the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database, a role can only
include privileges that apply to its database and can only inherit from
other roles in its database.
</p>
<p class="leafygreen-ui-1kp3ins">
A role created in the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database can include privileges that
apply to the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database, other databases or to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/resource-document/#std-label-resource-cluster">
cluster
</a>
resource, and can inherit from roles
in other databases as well as the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Required Access
<a class="headerlink leafygreen-ui-1kepx47" href="#required-access" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="required-access">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You must have the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-revokeRole">
<code class="leafygreen-ui-1l06pbn">
revokeRole
</code>
</a>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#std-label-security-user-actions">
action
</a>
on all databases in order to update a role.
</p>
<p class="leafygreen-ui-1kp3ins">
You must have the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-grantRole">
<code class="leafygreen-ui-1l06pbn">
grantRole
</code>
</a>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#std-label-security-user-actions">
action
</a>
on the database of each role in the
<code class="leafygreen-ui-1l06pbn">
roles
</code>
array
to update the array.
</p>
<p class="leafygreen-ui-1kp3ins">
You must have the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-grantRole">
<code class="leafygreen-ui-1l06pbn">
grantRole
</code>
</a>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#std-label-security-user-actions">
action
</a>
on the database of each privilege
in the
<code class="leafygreen-ui-1l06pbn">
privileges
</code>
array to update the array. If a privilege's
resource spans databases, you must have
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-grantRole">
<code class="leafygreen-ui-1l06pbn">
grantRole
</code>
</a>
on the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database. A privilege spans databases if the privilege is any of
the following:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
a collection in all databases
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
all collections and all database
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
the
<code class="leafygreen-ui-1l06pbn">
cluster
</code>
resource
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
You must have the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-setAuthenticationRestriction">
<code class="leafygreen-ui-1l06pbn">
setAuthenticationRestriction
</code>
</a>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#std-label-security-user-actions">
action
</a>
on the database of the target
role to update a role's
<code class="leafygreen-ui-1l06pbn">
authenticationRestrictions
</code>
document.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.updateRole" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
db.updateRole()
</code>
</span>
</a>
method replaces the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-roles-collection/#mongodb-data-admin.system.roles.privileges">
<code class="leafygreen-ui-1l06pbn">
privileges
</code>
</a>
and the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-roles-collection/#mongodb-data-admin.system.roles.roles">
<code class="leafygreen-ui-1l06pbn">
roles
</code>
</a>
for the
<code class="leafygreen-ui-1l06pbn">
inventoryControl
</code>
role
that exists in the
<code class="leafygreen-ui-1l06pbn">
products
</code>
database. The method runs on the
database that contains
<code class="leafygreen-ui-1l06pbn">
inventoryControl
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"use products\ndb.updateRole(\n \"inventoryControl\",\n {\n privileges:\n [\n {\n resource: { db:\"products\", collection:\"clothing\" },\n actions: [ \"update\", \"createCollection\", \"createIndex\"]\n }\n ],\n roles:\n [\n {\n role: \"read\",\n db: \"products\"\n }\n ]\n },\n { w:\"majority\" }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">use products</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">updateRole</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"inventoryControl"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">privileges</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">resource</span>: <!-- -->{ <span class="lg-highlight-attr">db</span>:<span class="lg-highlight-string">"products"</span>, <span class="lg-highlight-attr">collection</span>:<span class="lg-highlight-string">"clothing"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">actions</span>: <!-- -->[ <span class="lg-highlight-string">"update"</span>, <span class="lg-highlight-string">"createCollection"</span>, <span class="lg-highlight-string">"createIndex"</span>]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">roles</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">role</span>: <span class="lg-highlight-string">"read"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">db</span>: <span class="lg-highlight-string">"products"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">w</span>:<span class="lg-highlight-string">"majority"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To view a role's privileges, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/rolesInfo/#mongodb-dbcommand-dbcmd.rolesInfo">
<code class="leafygreen-ui-1l06pbn">
rolesInfo
</code>
</a>
command.
</p>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/update/pullAll/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$pullAll
<a class="headerlink leafygreen-ui-1kepx47" href="#-pullall" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-pullall">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="update">
<dt>
<code class="leafygreen-ui-1l06pbn">
$pullAll
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-update-up.-pullAll" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-update-up.-pullAll">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-pullAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$pullAll
</code>
</span>
</a>
operator removes all instances of the
specified values from an existing array. Unlike the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/pull/#mongodb-update-up.-pull">
<code class="leafygreen-ui-1l06pbn">
$pull
</code>
</a>
operator that removes elements by specifying a query,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-pullAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$pullAll
</code>
</span>
</a>
removes elements that match the listed values.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-pullAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$pullAll
</code>
</span>
</a>
operator has the form:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $pullAll: { <field1>: [ <value1>, <value2> ... ], ... } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$pullAll</span>: <!-- -->{ <<!-- -->field1<!-- -->><!-- -->: <!-- -->[ <<!-- -->value1<!-- -->><!-- -->,<!-- --> <!-- --><<!-- -->value2<!-- -->> <!-- -->...<!-- --> ]<!-- -->, <!-- -->...<!-- --> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To specify a
<code class="leafygreen-ui-1l06pbn">
<field>
</code>
in an embedded document or in an array, use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/document/#std-label-document-dot-notation">
dot notation
<!-- -->
.
</a>
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0, update operators process document fields with
string-based names in lexicographic order. Fields with numeric names are
processed in numeric order. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/#std-label-update-operators-processing-order">
Update Operators Behavior
</a>
for details.
</p>
<p class="leafygreen-ui-1kp3ins">
If a
<code class="leafygreen-ui-1l06pbn">
<value>
</code>
to remove is a document or an array,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-pullAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$pullAll
</code>
</span>
</a>
removes only the elements in the array that match
the specified
<code class="leafygreen-ui-1l06pbn">
<value>
</code>
exactly, including order.
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
no longer raises an
error when you use an update operator like
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-update-up.-pullAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$pullAll
</code>
</span>
</a>
with an empty operand expression (
<code class="leafygreen-ui-1l06pbn">
{ }
</code>
). An empty update results
in no changes and no
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-oplog">
oplog
</a>
entry is created (meaning that the
operation is a no-op).
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Create the
<code class="leafygreen-ui-1l06pbn">
survey
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.survey.insertOne( { _id: 1, scores: [ 0, 2, 5, 5, 1, 0 ] } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">survey</span>.<span class="lg-highlight-title lg-highlight-function">insertOne</span>( <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">scores</span>: <!-- -->[ <span class="lg-highlight-number">0</span>, <span class="lg-highlight-number">2</span>, <span class="lg-highlight-number">5</span>, <span class="lg-highlight-number">5</span>, <span class="lg-highlight-number">1</span>, <span class="lg-highlight-number">0</span> ] } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following operation removes all instances of the values "0" and "5"
from the
<code class="leafygreen-ui-1l06pbn">
scores
</code>
array:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.survey.updateOne( { _id: 1 }, { $pullAll: { scores: [ 0, 5 ] } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">survey</span>.<span class="lg-highlight-title lg-highlight-function">updateOne</span>( <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">$pullAll</span>: <!-- -->{ <span class="lg-highlight-attr">scores</span>: <!-- -->[ <span class="lg-highlight-number">0</span>, <span class="lg-highlight-number">5</span> ] } } )</td></tr></tbody></table></code></pre>
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
After the update, the
<code class="leafygreen-ui-1l06pbn">
scores
</code>
field no longer has any instances of
"0" or "5".
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"scores\" : [ 2, 1 ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"scores"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">2</span>, <span class="lg-highlight-number">1</span> ] }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</svg>
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</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.updateMany/#mongodb-method-db.collection.updateMany">
<code class="leafygreen-ui-1l06pbn">
db.collection.updateMany()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.findAndModify/#mongodb-method-db.collection.findAndModify">
<code class="leafygreen-ui-1l06pbn">
db.collection.findAndModify()
</code>
</a>
</p>
</li>
</ul>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/write-performance/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Write Operation Performance
<a class="headerlink leafygreen-ui-1kepx47" href="#write-operation-performance" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="write-operation-performance">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#indexes" target="_self">
<span>
Indexes
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#journaling" target="_self">
<span>
Journaling
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Indexes
<a class="headerlink leafygreen-ui-1kepx47" href="#indexes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="indexes">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Each index on a collection adds some amount of overhead to the
performance of write operations.
</p>
<p class="leafygreen-ui-1kp3ins">
For each
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/insert/#mongodb-dbcommand-dbcmd.insert">
<code class="leafygreen-ui-1l06pbn">
insert
</code>
</a>
or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/delete/#mongodb-dbcommand-dbcmd.delete">
<code class="leafygreen-ui-1l06pbn">
delete
</code>
</a>
write operation
on a collection, MongoDB either inserts or removes the corresponding
document keys from each index in the target collection. An
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/update/#mongodb-dbcommand-dbcmd.update">
<code class="leafygreen-ui-1l06pbn">
update
</code>
</a>
operation may result in updates to a subset of
indexes on the collection, depending on the keys affected by the update.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
MongoDB only updates a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-sparse/#std-label-index-type-sparse">
sparse
</a>
or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-partial/#std-label-index-type-partial">
partial
</a>
index if the documents involved
in a write operation are included in the index.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
In general, the performance gains that indexes provide for
<em>
read
operations
</em>
are worth the insertion penalty. However, in order to
optimize write performance when possible, be careful when creating new
indexes and evaluate the existing indexes to ensure that your queries
actually use these indexes.
</p>
<p class="leafygreen-ui-1kp3ins">
For indexes and queries, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-optimization/">
Query Optimization
</a>
. For more
information on indexes, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/indexes/">
Indexes
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/applications/indexes/">
Indexing Strategies
<!-- -->
.
</a>
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Journaling
<a class="headerlink leafygreen-ui-1kepx47" href="#journaling" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="journaling">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To provide durability in the event of a crash, MongoDB uses
<em>
write
ahead logging
</em>
to an on-disk
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-journal">
journal
</a>
. MongoDB writes the
in-memory changes first to the on-disk journal files. If MongoDB should
terminate or encounter an error before committing the changes to the
data files, MongoDB can use the journal files to apply the write
operation to the data files.
</p>
<p class="leafygreen-ui-1kp3ins">
While the durability assurance provided by the journal typically
outweigh the performance costs of the additional write operations,
consider the following interactions between the journal and
performance:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If the journal and the data file reside on the same block device,
the data files and the journal may have to contend for a finite
number of available I/O resources. Moving the journal to a
separate device may increase the capacity for write operations.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If applications specify
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#std-label-write-concern">
write concerns
</a>
that include the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#mongodb-writeconcern-writeconcern.j">
<code class="leafygreen-ui-1l06pbn">
j option
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
will decrease the duration between journal
writes, which can increase the overall write load.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The duration between journal writes is configurable using the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-storage.journal.commitIntervalMs">
<code class="leafygreen-ui-1l06pbn">
commitIntervalMs
</code>
</a>
run-time option. Decreasing the
period between journal commits will increase the number of write
operations, which can limit MongoDB's capacity for write
operations. Increasing the amount of time between journal commits may
decrease the total number of write operation, but also increases the
chance that the journal will not record a write operation in the
event of a failure.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For additional information on journaling, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/journaling/">
Journaling
<!-- -->
.
</a>
</p>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/aggregation/toDouble/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$toDouble (aggregation)
<a class="headerlink leafygreen-ui-1kepx47" href="#-todouble--aggregation-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-todouble--aggregation-">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="expression">
<dt>
<code class="leafygreen-ui-1l06pbn">
$toDouble
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-expression-exp.-toDouble" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-expression-exp.-toDouble">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Converts a value to a double. If the value cannot be converted to
an double,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-toDouble" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$toDouble
</code>
</span>
</a>
errors. If the value is null or
missing,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-toDouble" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$toDouble
</code>
</span>
</a>
returns null.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-toDouble" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$toDouble
</code>
</span>
</a>
has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n $toDouble: <expression>\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$toDouble</span>: <<!-- -->expression<!-- -->></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-toDouble" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$toDouble
</code>
</span>
</a>
takes any valid
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-toDouble" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$toDouble
</code>
</span>
</a>
is a shorthand for the following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/convert/#mongodb-expression-exp.-convert">
<code class="leafygreen-ui-1l06pbn">
$convert
</code>
</a>
expression:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $convert: { input: <expression>, to: \"double\" } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$convert</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <<!-- -->expression<!-- -->><!-- -->,<!-- --> <span class="lg-highlight-attr">to</span>: <span class="lg-highlight-string">"double"</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following table lists the input types that can be converted to a
double:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Input Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Behavior
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
Returns
<code class="leafygreen-ui-1l06pbn">
0
</code>
for
<code class="leafygreen-ui-1l06pbn">
false
</code>
.
</div>
<div class="line">
Returns
<code class="leafygreen-ui-1l06pbn">
1
</code>
for
<code class="leafygreen-ui-1l06pbn">
true
</code>
.
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Double
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
No-op. Returns the double.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Decimal
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Returns the decimal value as a double.
</p>
<p class="leafygreen-ui-1kp3ins">
The decimal value must fall within the minimum and
maximum value for a double.
</p>
<p class="leafygreen-ui-1kp3ins">
You cannot convert a decimal value whose value is less
than the minimum double value or is greater than the maximum
double value.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the int value as a double.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Long
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the long value as a double.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
String
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Returns the numerical value of the string as a double.
</p>
<p class="leafygreen-ui-1kp3ins">
The string value must be of a base
<sub>
10
</sub>
numeric value (e.g.
<code class="leafygreen-ui-1l06pbn">
"-5.5"
</code>
,
<code class="leafygreen-ui-1l06pbn">
"123456"
</code>
) and fall within the minimum and
maximum value for a double.
</p>
<p class="leafygreen-ui-1kp3ins">
You cannot convert a string value of a non-base
<sub>
10
</sub>
number (e.g.
<code class="leafygreen-ui-1l06pbn">
"0x6400"
</code>
) or a value that falls
outside the minimum and maximum value for a double.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Date
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns the number of milliseconds since the epoch that
corresponds to the date value.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
The following table lists some conversion to double examples:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:80%"/>
<col style="width:20%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Example
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Results
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
$toDouble: true
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
1
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
$toDouble: false
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
0
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
$toDouble: 2.5
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
2.5
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
$toDouble: NumberInt(5)
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
5
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
$toDouble: NumberLong(10000)
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
10000
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
$toDouble: "-5.5"
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
-5.5
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
$toDouble: ISODate("2018-03-27T05:04:47.890Z")
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
1522127087890
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Create a collection
<code class="leafygreen-ui-1l06pbn">
weather
</code>
with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.weather.insertMany( [\n { _id: 1, date: new Date(\"2018-06-01\"), temp: \"26.1C\" },\n { _id: 2, date: new Date(\"2018-06-02\"), temp: \"25.1C\" },\n { _id: 3, date: new Date(\"2018-06-03\"), temp: \"25.4C\" },\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">weather</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">date</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2018-06-01"</span>)<!-- -->, <span class="lg-highlight-attr">temp</span>: <span class="lg-highlight-string">"26.1C"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">date</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2018-06-02"</span>)<!-- -->, <span class="lg-highlight-attr">temp</span>: <span class="lg-highlight-string">"25.1C"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">date</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2018-06-03"</span>)<!-- -->, <span class="lg-highlight-attr">temp</span>: <span class="lg-highlight-string">"25.4C"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following aggregation operation on the
<code class="leafygreen-ui-1l06pbn">
weather
</code>
collection
parses the
<code class="leafygreen-ui-1l06pbn">
temp
</code>
value and converts to a double:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"// Define stage to add degrees field with converted value\n\ntempConversionStage = {\n $addFields: {\n degrees: { $toDouble: { $substrBytes: [ \"$temp\", 0, 4 ] } }\n }\n};\n\n\ndb.weather.aggregate( [\n tempConversionStage,\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">//</span><span class="lg-highlight-comment"> Define stage to </span><span class="lg-highlight-comment">add</span><span class="lg-highlight-comment"> degrees field with </span><span class="lg-highlight-comment">converted value</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">tempConversionStage <!-- -->= <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$addFields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">degrees</span>: <!-- -->{ <span class="lg-highlight-attr">$toDouble</span>: <!-- -->{ <span class="lg-highlight-attr">$substrBytes</span>: <!-- -->[ <span class="lg-highlight-string">"$temp"</span>, <span class="lg-highlight-number">0</span>, <span class="lg-highlight-number">4</span> ] } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">weather</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->tempConversionStage<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"date\" : ISODate(\"2018-06-01T00:00:00Z\"), \"temp\" : \"26.1C\", \"degrees\" : 26.1 }\n{ \"_id\" : 2, \"date\" : ISODate(\"2018-06-02T00:00:00Z\"), \"temp\" : \"25.1C\", \"degrees\" : 25.1 }\n{ \"_id\" : 3, \"date\" : ISODate(\"2018-06-03T00:00:00Z\"), \"temp\" : \"25.4C\", \"degrees\" : 25.4 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"date"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2018-06-01T00:00:00Z"</span>)<!-- -->, <span class="lg-highlight-string">"temp"</span> <!-- -->: <span class="lg-highlight-string">"26.1C"</span>, <span class="lg-highlight-string">"degrees"</span> <!-- -->: <span class="lg-highlight-number">26.1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"date"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2018-06-02T00:00:00Z"</span>)<!-- -->, <span class="lg-highlight-string">"temp"</span> <!-- -->: <span class="lg-highlight-string">"25.1C"</span>, <span class="lg-highlight-string">"degrees"</span> <!-- -->: <span class="lg-highlight-number">25.1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"date"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2018-06-03T00:00:00Z"</span>)<!-- -->, <span class="lg-highlight-string">"temp"</span> <!-- -->: <span class="lg-highlight-string">"25.4C"</span>, <span class="lg-highlight-string">"degrees"</span> <!-- -->: <span class="lg-highlight-number">25.4</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If the conversion operation encounters an error, the aggregation
operation stops and throws an error. To override this behavior, use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/convert/#mongodb-expression-exp.-convert">
<code class="leafygreen-ui-1l06pbn">
$convert
</code>
</a>
instead.
</p>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/db.getSiblingDB/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
db.getSiblingDB()
<a class="headerlink leafygreen-ui-1kepx47" href="#db.getsiblingdb--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="db.getsiblingdb--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
db.getSiblingDB(<database>)
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-db.getSiblingDB" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-db.getSiblingDB">
</div>
</a>
</dt>
<dd>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Parameter
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
database
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The name of a MongoDB database.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<table class="css-11h39yh e1nex8bq0">
<colgroup>
<col class="field-name"/>
<col class="field-body"/>
</colgroup>
<tbody>
<tr class="css-x8snli">
<th>
Returns
<!-- -->
:
</th>
<td>
A database object.
</td>
</tr>
</tbody>
</table>
<p class="leafygreen-ui-1kp3ins">
Used to return another database without modifying the
<code class="leafygreen-ui-1l06pbn">
db
</code>
variable in the shell environment.
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.getSiblingDB" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
db.getSiblingDB()
</code>
</span>
</a>
as an alternative to the
<code class="leafygreen-ui-1l06pbn">
use
<database>
</code>
helper. This is particularly useful when writing scripts
using
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
where the
<code class="leafygreen-ui-1l06pbn">
use
</code>
helper is not
available.
</p>
<p class="leafygreen-ui-1kp3ins">
Consider a MongoDB instance with two databases,
<code class="leafygreen-ui-1l06pbn">
users
</code>
and
<code class="leafygreen-ui-1l06pbn">
records
</code>
. The
<code class="leafygreen-ui-1l06pbn">
active
</code>
collection is a part of the
<code class="leafygreen-ui-1l06pbn">
users
</code>
database. The
<code class="leafygreen-ui-1l06pbn">
requests
</code>
collection is a part of the
<code class="leafygreen-ui-1l06pbn">
records
</code>
database.
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Specify a Database
<a class="headerlink leafygreen-ui-1kepx47" href="#specify-a-database" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="specify-a-database">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
This operation sets the
<code class="leafygreen-ui-1l06pbn">
db
</code>
object to point to the database named
<code class="leafygreen-ui-1l06pbn">
users
</code>
, and then returns a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.countDocuments/#mongodb-method-db.collection.countDocuments">
<code class="leafygreen-ui-1l06pbn">
document count
</code>
</a>
for the
<code class="leafygreen-ui-1l06pbn">
active
</code>
collection.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db = db.getSiblingDB('users')\ndb.active.countDocuments()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db <!-- -->= <!-- -->db.<span class="lg-highlight-title lg-highlight-function">getSiblingDB</span>(<span class="lg-highlight-string">'users'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">active</span>.<span class="lg-highlight-title lg-highlight-function">countDocuments</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Use Multiple Databases
<a class="headerlink leafygreen-ui-1kepx47" href="#use-multiple-databases" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="use-multiple-databases">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
You can create multiple
<code class="leafygreen-ui-1l06pbn">
db
</code>
objects, that refer to different
databases, as in the following sequence of operations:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"users = db.getSiblingDB('users')\nrecords = db.getSiblingDB('records')\n\nusers.active.countDocuments()\nusers.active.findOne()\n\nrecords.requests.countDocuments()\nrecords.requests.findOne()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">users <!-- -->= <!-- -->db.<span class="lg-highlight-title lg-highlight-function">getSiblingDB</span>(<span class="lg-highlight-string">'users'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">records <!-- -->= <!-- -->db.<span class="lg-highlight-title lg-highlight-function">getSiblingDB</span>(<span class="lg-highlight-string">'records'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">users.<span class="lg-highlight-property">active</span>.<span class="lg-highlight-title lg-highlight-function">countDocuments</span>(<!-- -->)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">users.<span class="lg-highlight-property">active</span>.<span class="lg-highlight-title lg-highlight-function">findOne</span>(<!-- -->)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">records.<span class="lg-highlight-property">requests</span>.<span class="lg-highlight-title lg-highlight-function">countDocuments</span>(<!-- -->)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">records.<span class="lg-highlight-property">requests</span>.<span class="lg-highlight-title lg-highlight-function">findOne</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
This operation creates two
<code class="leafygreen-ui-1l06pbn">
db
</code>
objects. Each
<code class="leafygreen-ui-1l06pbn">
db
</code>
object refers to
a different database,
<code class="leafygreen-ui-1l06pbn">
users
</code>
or
<code class="leafygreen-ui-1l06pbn">
records
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
For each database, the query returns:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.countDocuments/#mongodb-method-db.collection.countDocuments">
<code class="leafygreen-ui-1l06pbn">
document count
</code>
</a>
, and
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.findOne/#mongodb-method-db.collection.findOne">
<code class="leafygreen-ui-1l06pbn">
example document
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
from a collection in that database.
</p>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/timeseries/timeseries-index/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Time Series Indexes
<a class="headerlink leafygreen-ui-1kepx47" href="#time-series-indexes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="time-series-indexes">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#clustered-collection" target="_self">
<span>
Clustered Collection
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compound-indexes" target="_self">
<span>
Compound Indexes
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#partial-indexes" target="_self">
<span>
Partial Indexes
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#ttl-indexes" target="_self">
<span>
TTL Indexes
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#prohibited-indexes" target="_self">
<span>
Prohibited Indexes
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#indexing-best-practices" target="_self">
<span>
Indexing Best Practices
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
Indexes on time series collections generally behave like indexes on
regular collections, but with several additional considerations and
limitations.
</p>
<p class="leafygreen-ui-1kp3ins">
If there are
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-secondary-index">
secondary indexes
</a>
on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/timeseries-collections/#std-label-manual-timeseries-collection">
time
series collections
</a>
and you need to
downgrade the feature compatibility version (fCV), you must first drop
any secondary indexes that are incompatible with the downgraded fCV.
For more information, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/setFeatureCompatibilityVersion/#mongodb-dbcommand-dbcmd.setFeatureCompatibilityVersion">
<code class="leafygreen-ui-1l06pbn">
setFeatureCompatibilityVersion
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in version 6.0, you can add a secondary index to any field in a
time series collection. MongoDB indexes time series collections by
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/timeseries/timeseries-bucketing/#std-label-timeseries-bucketing">
buckets
</a>
of documents as opposed to individual
documents. Time series buckets contain documents with shared metaField values,
ordered by timeField values that are close together. MongoDB indexes the
minimum and maximum values of all fields, except the metaField. Indexing
buckets instead of individual documents reduces index size and improves query
efficiency.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
To improve query performance, you can manually
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/timeseries/timeseries-secondary-index/#std-label-timeseries-add-secondary-index">
add secondary
indexes
</a>
any field in your time
series collection.
</p>
</div>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Clustered Collection
<a class="headerlink leafygreen-ui-1kepx47" href="#clustered-collection" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="clustered-collection">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
By default, MongoDB clusters time series collections based on bucket
time.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compound Indexes
<a class="headerlink leafygreen-ui-1kepx47" href="#compound-indexes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compound-indexes">
</div>
</a>
</h2>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.3
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.3, MongoDB creates a default
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-compound/#std-label-index-type-compound">
compound index
</a>
on both the metaField and timeField of a time
series collection. MongoDB uses this index to improve query performance
and speed.
</p>
<p class="leafygreen-ui-1kp3ins">
You can add a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-compound/#std-label-index-type-compound">
compound index
</a>
on the
<code class="leafygreen-ui-1l06pbn">
timeField
</code>
,
<code class="leafygreen-ui-1l06pbn">
metaField
</code>
, or measurement fields.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Partial Indexes
<a class="headerlink leafygreen-ui-1kepx47" href="#partial-indexes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="partial-indexes">
</div>
</a>
</h2>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.0, you can use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/or/#mongodb-query-op.-or">
<code class="leafygreen-ui-1l06pbn">
$or
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/in/#mongodb-query-op.-in">
<code class="leafygreen-ui-1l06pbn">
$in
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/geoWithin/#mongodb-query-op.-geoWithin">
<code class="leafygreen-ui-1l06pbn">
$geoWithin
</code>
</a>
operators with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-partial/#std-label-index-type-partial">
partial indexes
</a>
on a time series collection.
</p>
<p class="leafygreen-ui-1kp3ins">
You cannot create
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-partial/#std-label-index-type-partial">
partial indexes
</a>
on the
metaField and timeField.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
TTL Indexes
<a class="headerlink leafygreen-ui-1kepx47" href="#ttl-indexes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="ttl-indexes">
</div>
</a>
</h2>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.3
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 6.3, you can create a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-ttl/#std-label-index-feature-ttl">
TTL
</a>
index with a
<code class="leafygreen-ui-1l06pbn">
partialFilterExpression
</code>
that relies only on the
metaField. In versions prior to 6.3, you can only create TTL indexes
based on the
<code class="leafygreen-ui-1l06pbn">
expireAfterSeconds
</code>
parameter.
</p>
<p class="leafygreen-ui-1kp3ins">
If your time series collection doesn't use the
<code class="leafygreen-ui-1l06pbn">
expireAfterSeconds
</code>
option to expire documents, creating a partial TTL index sets an
expiration time for matching documents only. If the collection uses
<code class="leafygreen-ui-1l06pbn">
expireAfterSeconds
</code>
for all documents, you can use a partial TTL
index to expire matching documents sooner.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-timeseries--prohibited-index">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Prohibited Indexes
<a class="headerlink leafygreen-ui-1kepx47" href="#prohibited-indexes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="prohibited-indexes">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
MongoDB does not allow the following index types on time series
collections:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-text/#std-label-index-type-text">
Text indexes
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2d/#std-label-2d-index">
2d indexes
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-unique/#std-label-index-type-unique">
Unique indexes
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
You cannot create sparse indexes on the metaField.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Indexing Best Practices
<a class="headerlink leafygreen-ui-1kepx47" href="#indexing-best-practices" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="indexing-best-practices">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Use the metaField index for filtering and equality.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Use the timeField and other indexed fields for range queries.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
General indexing strategies also apply to time series collections. For
more information, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/applications/indexes/#std-label-indexing-strategies">
Indexing Strategies
<!-- -->
.
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For more information and examples, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/timeseries/timeseries-secondary-index/#std-label-timeseries-add-secondary-index">
Add Secondary Indexes to Time Series Collections
<!-- -->
.
</a>
</p>
</section>
</section>
|
https://www.mongodb.com/docs/manual/tutorial/install-mongodb-on-debian-tarball/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Install MongoDB Community on Debian using .tgz Tarball
<a class="headerlink leafygreen-ui-1kepx47" href="#install-mongodb-community-on-debian-using-.tgz-tarball" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="install-mongodb-community-on-debian-using-.tgz-tarball">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#overview" target="_self">
<span>
Overview
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#considerations" target="_self">
<span>
Considerations
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#install-mongodb-community-edition" target="_self">
<span>
Install MongoDB Community Edition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#run-mongodb-community-edition" target="_self">
<span>
Run MongoDB Community Edition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#additional-information" target="_self">
<span>
Additional Information
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Overview
<a class="headerlink leafygreen-ui-1kepx47" href="#overview" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="overview">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Use this tutorial to manually install MongoDB 8.0
<!-- -->
Community
<!-- -->
Edition on Debian Linux using a downloaded
<code class="leafygreen-ui-1l06pbn">
.tgz
</code>
tarball.
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
MongoDB Version
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-version" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-version">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
This tutorial installs MongoDB 8.0
<!-- -->
Community
<!-- -->
Edition. To install a different version of MongoDB
<!-- -->
Community
<!-- -->
,
use the version drop-down menu in the upper-left corner of this page to
select the documentation for that version.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Installation Method
<a class="headerlink leafygreen-ui-1kepx47" href="#installation-method" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="installation-method">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
While MongoDB can be installed manually via a downloaded
<code class="leafygreen-ui-1l06pbn">
.tgz
</code>
tarball as described in this document, it is recommended to use the
<code class="leafygreen-ui-1l06pbn">
apt
</code>
package manager on your system to install MongoDB if
possible. Using a package manager automatically installs all needed
dependencies, provides an example
<code class="leafygreen-ui-1l06pbn">
mongod.conf
</code>
file to get you
started, and simplifies future upgrade and maintenance tasks.
</p>
<p class="leafygreen-ui-1kp3ins">
➤
<!-- -->
See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/install-mongodb-on-debian/">
Install MongoDB using the apt Package Manager
</a>
for instructions.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Considerations
<a class="headerlink leafygreen-ui-1kepx47" href="#considerations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="considerations">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
MongoDB Shell,
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-shell--mongosh" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-shell--mongosh">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
When you use the
<code class="leafygreen-ui-1l06pbn">
.tgz
</code>
package to install the server, you need to
follow the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/install/" target="_self">
<span>
mongosh installation instructions
</span>
</a>
to
download and install
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/" target="_self">
<span>
mongosh
</span>
</a>
separately.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Platform Support
<a class="headerlink leafygreen-ui-1kepx47" href="#platform-support" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="platform-support">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
MongoDB 8.0 Community Edition supports the following
<strong class="css-4dei7l">
64-bit
</strong>
Debian releases on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/production-notes/#std-label-prod-notes-supported-platforms-x86_64">
x86_64
</a>
architecture:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Debian 12 "Bookworm"
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
MongoDB only supports the 64-bit versions of these platforms.
</p>
<p class="leafygreen-ui-1kp3ins">
See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/production-notes/#std-label-prod-notes-supported-platforms">
Platform Support
</a>
for more information.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Production Notes
<a class="headerlink leafygreen-ui-1kepx47" href="#production-notes" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="production-notes">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Before deploying MongoDB in a production environment, consider the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/production-notes/">
Production Notes for Self-Managed Deployments
</a>
document which offers
performance considerations and configuration recommendations for
production MongoDB deployments.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-install-community-debian-from-tarball">
</span>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Install MongoDB Community Edition
<a class="headerlink leafygreen-ui-1kepx47" href="#install-mongodb-community-edition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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<div class="css-1btu0w3 evvkmar0" id="install-mongodb-community-edition">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Prerequisites
<a class="headerlink leafygreen-ui-1kepx47" href="#prerequisites" title="Permalink to this heading">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="prerequisites">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Use the following command to install the dependencies required for the
MongoDB
<!-- -->
Community
<!-- -->
<code class="leafygreen-ui-1l06pbn">
.tgz
</code>
tarball:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo apt-get install libcurl4 libgssapi-krb5-2 libldap-common libwrap0 libsasl2-2 libsasl2-modules libsasl2-modules-gssapi-mit openssl liblzma5","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo apt-get install libcurl4 libgssapi-krb5-2 libldap-common libwrap0 libsasl2-2 libsasl2-modules libsasl2-modules-gssapi-mit openssl liblzma5</td></tr></tbody></table></code></pre>
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</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Procedure
<a class="headerlink leafygreen-ui-1kepx47" href="#procedure" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="procedure">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Follow these steps to manually install MongoDB
<!-- -->
Community
<!-- -->
Edition from
the
<code class="leafygreen-ui-1l06pbn">
.tgz
</code>
.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"HowTo","steps":[{"@type":"HowToStep","text":"Download the tarball.After you have installed the required prerequisite packages, download\nthe MongoDB Community tgz tarball from the following link:➤ MongoDB Download CenterIn the Version dropdown, select the version of\nMongoDB to download.In the Platform dropdown, select your operating system\nversion and architecture.In the Package dropdown, select tgz.Click Download."},{"@type":"HowToStep","text":"Extract the files from the downloaded archive.For example, from a system shell, you can extract using the tar command:"},{"@type":"HowToStep","text":"Ensure the binaries are in a directory listed in your PATH environment variable.The MongoDB binaries are in the bin/ directory of the tarball.\nYou can either:Copy the binaries into a directory listed in your PATH\nvariable, such as /usr/local/bin (Update\n/path/to/the/mongodb-directory/ with your installation\ndirectory as appropriate)Create symbolic links to the binaries from a directory listed in\nyour PATH variable, such as /usr/local/bin (Update\n/path/to/the/mongodb-directory/ with your installation\ndirectory as appropriate):"},{"@type":"HowToStep","text":"Install the MongoDB Shell (mongosh).Install mongosh then use the MongoDB Shell\nto connect to your deployment.Download the package for the version of mongosh you need from the\nMongoDB Download Center and uncompress the package."}],"name":"Procedure","image":"https://webimages.mongodb.com/_com_assets/cms/kuyj2focmkbxv7gh3-stacked_default_slate_blue.svg?auto=format%252Ccompress"}
</script>
<div class="css-4nyere eccljxs0">
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
1
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Download the tarball.
<a class="headerlink leafygreen-ui-1kepx47" href="#download-the-tarball" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="download-the-tarball">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
After you have installed the required prerequisite packages, download
the MongoDB
<!-- -->
Community
<!-- -->
<code class="leafygreen-ui-1l06pbn">
tgz
</code>
tarball from the following link:
</p>
<p class="leafygreen-ui-1kp3ins">
➤
<!-- -->
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/try/download/community?tck=docs_server" target="_self">
<span>
MongoDB Download Center
</span>
</a>
</p>
<ol class="leafygreen-ui-rioki0" type="a">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
In the
<span class="guilabel css-h15tq0">
Version
</span>
dropdown, select the version of
MongoDB to download.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
In the
<span class="guilabel css-h15tq0">
Platform
</span>
dropdown, select your operating system
version and architecture.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
In the
<span class="guilabel css-h15tq0">
Package
</span>
dropdown, select
<span class="guilabel css-h15tq0">
tgz
</span>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Click
<span class="guilabel css-h15tq0">
Download
</span>
.
</p>
</li>
</ol>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
2
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Extract the files from the downloaded archive.
<a class="headerlink leafygreen-ui-1kepx47" href="#extract-the-files-from-the-downloaded-archive" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="extract-the-files-from-the-downloaded-archive">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
For example, from a system shell, you can extract using the
<code class="leafygreen-ui-1l06pbn">
tar
</code>
command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"tar -zxvf mongodb-linux-*-8.0.0.tgz","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">tar -zxvf mongodb-linux-*-8.0.0.tgz</td></tr></tbody></table></code></pre>
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</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
3
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Ensure the binaries are in a directory listed in your
<code class="leafygreen-ui-1l06pbn">
PATH
</code>
environment variable.
<a class="headerlink leafygreen-ui-1kepx47" href="#ensure-the-binaries-are-in-a-directory-listed-in-your-path-environment-variable" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="ensure-the-binaries-are-in-a-directory-listed-in-your-path-environment-variable">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
The MongoDB binaries are in the
<code class="leafygreen-ui-1l06pbn">
bin/
</code>
directory of the tarball.
You can either:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Copy the binaries into a directory listed in your
<code class="leafygreen-ui-1l06pbn">
PATH
</code>
variable, such as
<code class="leafygreen-ui-1l06pbn">
/usr/local/bin
</code>
(Update
<code class="leafygreen-ui-1l06pbn">
/path/to/the/mongodb-directory/
</code>
with your installation
directory as appropriate)
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo cp /path/to/the/mongodb-directory/bin/* /usr/local/bin/","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo <span class="lg-highlight-built_in">cp</span> <!-- -->/path/to/the/mongodb-directory/bin<!-- -->/* <!-- -->/usr/local/bin<!-- -->/</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Create symbolic links to the binaries from a directory listed in
your
<code class="leafygreen-ui-1l06pbn">
PATH
</code>
variable, such as
<code class="leafygreen-ui-1l06pbn">
/usr/local/bin
</code>
(Update
<code class="leafygreen-ui-1l06pbn">
/path/to/the/mongodb-directory/
</code>
with your installation
directory as appropriate):
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo ln -s /path/to/the/mongodb-directory/bin/* /usr/local/bin/","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo <span class="lg-highlight-built_in">ln</span> -s <!-- -->/path/to/the/mongodb-directory/bin<!-- -->/* <!-- -->/usr/local/bin<!-- -->/</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
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</div>
</li>
</ul>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
4
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Install the MongoDB Shell (
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
).
<a class="headerlink leafygreen-ui-1kepx47" href="#install-the-mongodb-shell-mongosh" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="install-the-mongodb-shell-mongosh">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/install/" target="_self">
<span>
Install
</span>
</a>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
then use the MongoDB Shell
to connect to your deployment.
</p>
<p class="leafygreen-ui-1kp3ins">
Download the package for the version of
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
you need from the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/try/download/community?tck=docs_server" target="_self">
<span>
MongoDB Download Center
</span>
</a>
and uncompress the package.
</p>
</section>
</div>
</div>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Run MongoDB Community Edition
<a class="headerlink leafygreen-ui-1kepx47" href="#run-mongodb-community-edition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="run-mongodb-community-edition">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
ulimit Considerations
<a class="headerlink leafygreen-ui-1kepx47" href="#ulimit-considerations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="ulimit-considerations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Most Unix-like operating systems limit the system resources that a
process may use. These limits may negatively impact MongoDB operation,
and should be adjusted. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/ulimit/">
UNIX
<code class="leafygreen-ui-1l06pbn">
ulimit
</code>
Settings for Self-Managed Deployments
</a>
for the recommended
settings for your platform.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If the
<code class="leafygreen-ui-1l06pbn">
ulimit
</code>
value for number of open files is under
<code class="leafygreen-ui-1l06pbn">
64000
</code>
, MongoDB
generates a startup warning.
</p>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Directories
<a class="headerlink leafygreen-ui-1kepx47" href="#directories" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="directories">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
By default, a MongoDB instance stores:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
its data files in
<code class="leafygreen-ui-1l06pbn">
/var/lib/mongodb
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
its log files in
<code class="leafygreen-ui-1l06pbn">
/var/log/mongodb
</code>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
If you installed via the package manager, these default directories are
created during the installation.
</p>
<p class="leafygreen-ui-1kp3ins">
If you installed manually by downloading the tarballs, you can create
the directories using
<code class="leafygreen-ui-1l06pbn">
mkdir -p <directory>
</code>
or
<code class="leafygreen-ui-1l06pbn">
sudo mkdir -p
<directory>
</code>
depending on the user that will run MongoDB. (See your
linux man pages for information on
<code class="leafygreen-ui-1l06pbn">
mkdir
</code>
and
<code class="leafygreen-ui-1l06pbn">
sudo
</code>
.)
</p>
<p class="leafygreen-ui-1kp3ins">
By default, MongoDB runs using the
<code class="leafygreen-ui-1l06pbn">
mongodb
</code>
user account. If you
change the user that runs the MongoDB process, you
<strong>
must
</strong>
also modify
the permission to the
<code class="leafygreen-ui-1l06pbn">
/var/lib/mongodb
</code>
and
<code class="leafygreen-ui-1l06pbn">
/var/log/mongodb
</code>
directories to give this user access to these directories.
</p>
<p class="leafygreen-ui-1kp3ins">
To specify a different log file directory and data file directory, edit
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-systemLog.path">
<code class="leafygreen-ui-1l06pbn">
systemLog.path
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-storage.dbPath">
<code class="leafygreen-ui-1l06pbn">
storage.dbPath
</code>
</a>
settings in
the
<code class="leafygreen-ui-1l06pbn">
/etc/mongod.conf
</code>
. Ensure that the user running MongoDB has
access to these directories.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Procedure
<a class="headerlink leafygreen-ui-1kepx47" href="#procedure-1" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="procedure-1">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Follow these steps to run MongoDB
<!-- -->
Community
<!-- -->
Edition. These instructions
assume that you are using the default settings.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"HowTo","steps":[{"@type":"HowToStep","text":"Create the data and log directories.Create a directory where the MongoDB instance stores its data. For\nexample:Create a directory where the MongoDB instance stores its log. For example:The user that starts the MongoDB process must have read and write\npermission to these directories. For example, if you intend to run\nMongoDB as yourself:"},{"@type":"HowToStep","text":"Run MongoDB.To run MongoDB, run the mongod process at the system prompt.For details on the command-line options --dbpath and --logpath, see\nOptions."},{"@type":"HowToStep","text":"Verify that MongoDB has started successfully.Verify that MongoDB has started successfully by\nchecking the process output for the following line in the\nlog file /var/log/mongodb/mongod.log:You may see non-critical warnings in the process\noutput. As long as you see the log line shown above, you can safely\nignore these warnings during your initial evaluation of MongoDB."},{"@type":"HowToStep","text":"Begin using MongoDB.Start a mongosh session on the same host machine as the\nmongod. You can run mongosh\nwithout any command-line options to connect to a\nmongod that is running on your localhost with default\nport 27017.For more information on connecting using mongosh,\nsuch as to connect to a mongod instance running\non a different host and/or port, see the\nmongosh documentation.To help you start using MongoDB, MongoDB provides Getting\nStarted Guides in various driver editions. For the\ndriver documentation, see Start Developing with MongoDB."}],"name":"Procedure","image":"https://webimages.mongodb.com/_com_assets/cms/kuyj2focmkbxv7gh3-stacked_default_slate_blue.svg?auto=format%252Ccompress"}
</script>
<div class="css-4nyere eccljxs0">
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
1
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Create the data and log directories.
<a class="headerlink leafygreen-ui-1kepx47" href="#create-the-data-and-log-directories" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="create-the-data-and-log-directories">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Create a directory where the MongoDB instance stores its data. For
example:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo mkdir -p /var/lib/mongo","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo <span class="lg-highlight-built_in">mkdir</span> -p <!-- -->/var/lib/mongo</td></tr></tbody></table></code></pre>
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</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Create a directory where the MongoDB instance stores its log. For example:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo mkdir -p /var/log/mongodb","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo <span class="lg-highlight-built_in">mkdir</span> -p <!-- -->/var/log/mongodb</td></tr></tbody></table></code></pre>
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</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The user that starts the MongoDB process must have read and write
permission to these directories. For example, if you intend to run
MongoDB as yourself:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sudo chown `whoami` /var/lib/mongo # Or substitute another user\nsudo chown `whoami` /var/log/mongodb # Or substitute another user","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sudo <span class="lg-highlight-built_in">chown</span> `<span class="lg-highlight-built_in">whoami</span>` <!-- -->/var/lib/mongo<!-- --> <span class="lg-highlight-comment"># Or substitute another user</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">sudo <span class="lg-highlight-built_in">chown</span> `<span class="lg-highlight-built_in">whoami</span>` <!-- -->/var/log/mongodb<!-- --> <span class="lg-highlight-comment"># Or substitute another user</span></td></tr></tbody></table></code></pre>
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</div>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
2
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</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Run MongoDB.
<a class="headerlink leafygreen-ui-1kepx47" href="#run-mongodb" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="run-mongodb">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
To run MongoDB, run the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
process at the system prompt.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"mongod --dbpath /var/lib/mongo --logpath /var/log/mongodb/mongod.log --fork","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongod --dbpath <!-- -->/var/lib/mongo<!-- --> --logpath <!-- -->/var/log/mongodb/mongod.log<!-- --> --fork</td></tr></tbody></table></code></pre>
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</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For details on the command-line options
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--dbpath">
<code class="leafygreen-ui-1l06pbn">
--dbpath
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--logpath">
<code class="leafygreen-ui-1l06pbn">
--logpath
</code>
</a>
, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-label-mongod-options">
Options
<!-- -->
.
</a>
</p>
</section>
</div>
</div>
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<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
3
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Verify that MongoDB has started successfully.
<a class="headerlink leafygreen-ui-1kepx47" href="#verify-that-mongodb-has-started-successfully" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="verify-that-mongodb-has-started-successfully">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Verify that MongoDB has started successfully by
checking the process output for the following line in the
log file
<code class="leafygreen-ui-1l06pbn">
/var/log/mongodb/mongod.log
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[initandlisten] waiting for connections on port 27017\n"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[initandlisten] waiting for connections on port 27017</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
You may see non-critical warnings in the process
output. As long as you see the log line shown above, you can safely
ignore these warnings during your initial evaluation of MongoDB.
</p>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
4
</div>
</div>
<div class="css-1ed38mk">
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Begin using MongoDB.
<a class="headerlink leafygreen-ui-1kepx47" href="#begin-using-mongodb" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="begin-using-mongodb">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Start a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
session on the same host machine as the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
. You can run
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
without any command-line options to connect to a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
that is running on your localhost with default
port 27017.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"\nmongosh\n","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongosh</td></tr></tbody></table></code></pre>
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</svg>
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</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For more information on connecting using
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
,
such as to connect to a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instance running
on a different host and/or port, see the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/" target="_self">
<span>
mongosh documentation
<!-- -->
.
</span>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
To help you start using MongoDB, MongoDB provides
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/getting-started/#std-label-getting-started">
Getting
Started Guides
</a>
in various driver editions. For the
driver documentation, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://api.mongodb.com/" target="_self">
<span>
Start Developing with MongoDB
<!-- -->
.
</span>
</a>
</p>
</section>
</div>
</div>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Additional Information
<a class="headerlink leafygreen-ui-1kepx47" href="#additional-information" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="additional-information">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Localhost Binding by Default
<a class="headerlink leafygreen-ui-1kepx47" href="#localhost-binding-by-default" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="localhost-binding-by-default">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
By default, MongoDB launches with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-net.bindIp">
<code class="leafygreen-ui-1l06pbn">
bindIp
</code>
</a>
set to
<code class="leafygreen-ui-1l06pbn">
127.0.0.1
</code>
, which binds to the localhost network interface. This
means that the
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
can only accept connections from
clients that are running on the same machine. Remote clients will not be
able to connect to the
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
, and the
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
will
not be able to initialize a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-replica-set">
replica set
</a>
unless this value is set
to a valid network interface.
</p>
<p class="leafygreen-ui-1kp3ins">
This value can be configured either:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
in the MongoDB configuration file with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-net.bindIp">
<code class="leafygreen-ui-1l06pbn">
bindIp
</code>
</a>
, or
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
via the command-line argument
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--bind_ip">
<code class="leafygreen-ui-1l06pbn">
--bind_ip
</code>
</a>
</p>
</li>
</ul>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Before you bind your instance to a publicly-accessible IP address,
you must secure your cluster from unauthorized access. For a complete
list of security recommendations, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/security-checklist/#std-label-security-checklist">
Security Checklist for Self-Managed Deployments
</a>
. At minimum, consider
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/security-checklist/#std-label-checklist-auth">
enabling authentication
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/security-hardening/#std-label-network-config-hardening">
hardening
network infrastructure
<!-- -->
.
</a>
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For more information on configuring
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-net.bindIp">
<code class="leafygreen-ui-1l06pbn">
bindIp
</code>
</a>
, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/security-mongodb-configuration/">
IP Binding in Self-Managed Deployments
<!-- -->
.
</a>
</p>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/aggregation/regexFindAll/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$regexFindAll (aggregation)
<a class="headerlink leafygreen-ui-1kepx47" href="#-regexfindall--aggregation-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-regexfindall--aggregation-">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
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<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="expression">
<dt>
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-expression-exp.-regexFindAll" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-expression-exp.-regexFindAll">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Provides regular expression (regex) pattern matching capability in
aggregation expressions. The operator returns an array of documents
that contains information on each match. If a match is not found,
returns an empty array.
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-regexFindAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
</span>
</a>
operator has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $regexFindAll: { input: <expression> , regex: <expression>, options: <expression> } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <<!-- -->expression<!-- -->> <!-- -->,<!-- --> <span class="lg-highlight-attr">regex</span>: <<!-- -->expression<!-- -->><!-- -->,<!-- --> <span class="lg-highlight-attr">options</span>: <<!-- -->expression<!-- -->> <!-- -->} }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-input" target="_self">
<span>
input
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-regexFindAll-input">
</span>
<p class="leafygreen-ui-1kp3ins">
The string on which you wish to apply the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-regex" target="_self">
<span>
regex pattern
</span>
</a>
.
Can be a string or any valid
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
that resolves to a string.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-regex" target="_self">
<span>
regex
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-regexFindAll-regex">
</span>
<p class="leafygreen-ui-1kp3ins">
The regex pattern to apply. Can be any valid
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
that resolves to either a string or regex
pattern
<code class="leafygreen-ui-1l06pbn">
/<pattern>/
</code>
. When using the regex
<code class="leafygreen-ui-1l06pbn">
/<pattern>/
</code>
, you
can also specify the regex options
<code class="leafygreen-ui-1l06pbn">
i
</code>
and
<code class="leafygreen-ui-1l06pbn">
m
</code>
(but not the
<code class="leafygreen-ui-1l06pbn">
s
</code>
or
<code class="leafygreen-ui-1l06pbn">
x
</code>
options):
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"pattern"
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
/<pattern>/
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
/<pattern>/<options>
</code>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Alternatively, you can also specify the regex options with the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-options" target="_self">
<span>
options
</span>
</a>
field. To specify the
<code class="leafygreen-ui-1l06pbn">
s
</code>
or
<code class="leafygreen-ui-1l06pbn">
x
</code>
options, you
must use the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-options" target="_self">
<span>
options
</span>
</a>
field.
</p>
<p class="leafygreen-ui-1kp3ins">
You cannot specify options in both the
<code class="leafygreen-ui-1l06pbn">
regex
</code>
and the
<code class="leafygreen-ui-1l06pbn">
options
</code>
field.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-options" target="_self">
<span>
options
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-regexFindAll-options">
</span>
<p class="leafygreen-ui-1kp3ins">
<em>
Optional
</em>
. The following
<code class="leafygreen-ui-1l06pbn">
<options>
</code>
are available for use
with regular expression.
</p>
<p class="leafygreen-ui-1kp3ins">
You cannot specify options in both the
<code class="leafygreen-ui-1l06pbn">
regex
</code>
and the
<code class="leafygreen-ui-1l06pbn">
options
</code>
field.
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:90%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Option
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
i
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Case insensitivity to match both upper and lower cases. You
can specify the option in the
<code class="leafygreen-ui-1l06pbn">
options
</code>
field or as part of
the regex field.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
m
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
For patterns that include anchors (i.e.
<code class="leafygreen-ui-1l06pbn">
^
</code>
for the start,
<code class="leafygreen-ui-1l06pbn">
$
</code>
for the end), match at the beginning or end of each
line for strings with multiline values. Without this option,
these anchors match at beginning or end of the string.
</p>
<p class="leafygreen-ui-1kp3ins">
If the pattern contains no anchors or if the string value has
no newline characters (e.g.
<code class="leafygreen-ui-1l06pbn">
\n
</code>
), the
<code class="leafygreen-ui-1l06pbn">
m
</code>
option has no
effect.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
x
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
"Extended" capability to ignore all white space characters
in the pattern unless escaped or included in a character
class.
</p>
<p class="leafygreen-ui-1kp3ins">
Additionally, it ignores characters in-between and including
an un-escaped hash/pound (
<code class="leafygreen-ui-1l06pbn">
#
</code>
) character and the next new
line, so that you may include comments in complicated
patterns. This only applies to data characters; white space
characters may never appear within special character
sequences in a pattern.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
x
</code>
option does not affect the handling of the VT
character (i.e. code 11).
</p>
<p class="leafygreen-ui-1kp3ins">
You can specify the option only in the
<code class="leafygreen-ui-1l06pbn">
options
</code>
field.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
s
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Allows the dot character (i.e.
<code class="leafygreen-ui-1l06pbn">
.
</code>
) to match all
characters
<em>
including
</em>
newline characters.
</p>
<p class="leafygreen-ui-1kp3ins">
You can specify the option only in the
<code class="leafygreen-ui-1l06pbn">
options
</code>
field.
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Returns
<a class="headerlink leafygreen-ui-1kepx47" href="#returns" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="returns">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The operator returns an array:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If the operator does not find a match, the operator returns an empty
array.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If the operator finds a match, the operator returns an array of
documents that contains the following information for each match:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
the matching string in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-input" target="_self">
<span>
input
<!-- -->
,
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://www.unicode.org/glossary/#code_point" rel="noopener noreferrer">
<span>
code point
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
index (not byte index) of the matching string in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-input" target="_self">
<span>
input
</span>
</a>
, and
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
An array of the strings that corresponds to the groups captured by
the matching string. Capturing groups are specified with unescaped
parenthesis
<code class="leafygreen-ui-1l06pbn">
()
</code>
in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-regex" target="_self">
<span>
regex
</span>
</a>
pattern.
</p>
</li>
</ul>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[ { \"match\" : <string>, \"idx\" : <num>, \"captures\" : <array> }, ... ]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1agdxuk" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <<!-- -->string<!-- -->><!-- -->,<!-- --> <span class="lg-highlight-string">"idx"</span> <!-- -->: <<!-- -->num<!-- -->><!-- -->,<!-- --> <span class="lg-highlight-string">"captures"</span> <!-- -->: <span class="lg-highlight-tag lg-highlight-xml"><</span><span class="lg-highlight-name lg-highlight-tag lg-highlight-xml">array</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">of</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">strings</span><span class="lg-highlight-tag lg-highlight-xml">></span><span class="lg-highlight-xml"> }, ... ]</span></td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</li>
</ul>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/regexFind/#mongodb-expression-exp.-regexFind">
<code class="leafygreen-ui-1l06pbn">
$regexFind
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/regexMatch/#mongodb-expression-exp.-regexMatch">
<code class="leafygreen-ui-1l06pbn">
$regexMatch
</code>
</a>
</p>
</li>
</ul>
</div>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
PCRE Library
<a class="headerlink leafygreen-ui-1kepx47" href="#pcre-library" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="pcre-library">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in version 6.1, MongoDB uses the PCRE2 (Perl Compatible Regular Expressions) library to
implement regular expression pattern matching. To learn more about
PCRE2, see the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.pcre.org/current/doc/html/" rel="noopener noreferrer">
<span>
PCRE Documentation
<!-- -->
.
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
and Collation
<a class="headerlink leafygreen-ui-1kepx47" href="#-regexfindall-and-collation" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-regexfindall-and-collation">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-regexFindAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
</span>
</a>
ignores the collation specified for the
collection,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.aggregate/#mongodb-method-db.collection.aggregate">
<code class="leafygreen-ui-1l06pbn">
db.collection.aggregate()
</code>
</a>
, and the index, if used.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, the create a sample collection with collation strength
<code class="leafygreen-ui-1l06pbn">
1
</code>
(i.e. compare base character only and ignore other differences
such as case and diacritics):
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.createCollection( \"myColl\", { collation: { locale: \"fr\", strength: 1 } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">createCollection</span>( <span class="lg-highlight-string">"myColl"</span>, <!-- -->{ <span class="lg-highlight-attr">collation</span>: <!-- -->{ <span class="lg-highlight-attr">locale</span>: <span class="lg-highlight-string">"fr"</span>, <span class="lg-highlight-attr">strength</span>: <span class="lg-highlight-number">1</span> } } )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Insert the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.myColl.insertMany([\n { _id: 1, category: \"café\" },\n { _id: 2, category: \"cafe\" },\n { _id: 3, category: \"cafE\" }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">myColl</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">category</span>: <span class="lg-highlight-string">"café"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">category</span>: <span class="lg-highlight-string">"cafe"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">category</span>: <span class="lg-highlight-string">"cafE"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Using the collection's collation, the following operation performs a
case-insensitive and diacritic-insensitive match:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.myColl.aggregate( [ { $match: { category: \"cafe\" } } ] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">myColl</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">$match</span>: <!-- -->{ <span class="lg-highlight-attr">category</span>: <span class="lg-highlight-string">"cafe"</span> } } ] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following 3 documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"category\" : \"café\" }\n{ \"_id\" : 2, \"category\" : \"cafe\" }\n{ \"_id\" : 3, \"category\" : \"cafE\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"category"</span> <!-- -->: <span class="lg-highlight-string">"café"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"category"</span> <!-- -->: <span class="lg-highlight-string">"cafe"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"category"</span> <!-- -->: <span class="lg-highlight-string">"cafE"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
However, the aggregation expression
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/regexFind/#mongodb-expression-exp.-regexFind">
<code class="leafygreen-ui-1l06pbn">
$regexFind
</code>
</a>
ignores
collation; that is, the following regular expression pattern matching examples
are case-sensitive and diacritic sensitive:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.myColl.aggregate( [ { $addFields: { results: { $regexFindAll: { input: \"$category\", regex: /cafe/ } } } } ] )\ndb.myColl.aggregate(\n [ { $addFields: { results: { $regexFindAll: { input: \"$category\", regex: /cafe/ } } } } ],\n { collation: { locale: \"fr\", strength: 1 } } // Ignored in the $regexFindAll\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">myColl</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">$addFields</span>: <!-- -->{ <span class="lg-highlight-attr">results</span>: <!-- -->{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$category"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/cafe/</span> <!-- -->} } } } ] )</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">myColl</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">$addFields</span>: <!-- -->{ <span class="lg-highlight-attr">results</span>: <!-- -->{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$category"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/cafe/</span> <!-- -->} } } } ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">collation</span>: <!-- -->{ <span class="lg-highlight-attr">locale</span>: <span class="lg-highlight-string">"fr"</span>, <span class="lg-highlight-attr">strength</span>: <span class="lg-highlight-number">1</span> } } <span class="lg-highlight-comment">//</span><span class="lg-highlight-comment"> Ignored in the </span><span class="lg-highlight-comment">$regexFindAll</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Both operations return the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"category\" : \"café\", \"results\" : [ ] }\n{ \"_id\" : 2, \"category\" : \"cafe\", \"results\" : [ { \"match\" : \"cafe\", \"idx\" : 0, \"captures\" : [ ] } ] }\n{ \"_id\" : 3, \"category\" : \"cafE\", \"results\" : [ ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"category"</span> <!-- -->: <span class="lg-highlight-string">"café"</span>, <span class="lg-highlight-string">"results"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"category"</span> <!-- -->: <span class="lg-highlight-string">"cafe"</span>, <span class="lg-highlight-string">"results"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"cafe"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"category"</span> <!-- -->: <span class="lg-highlight-string">"cafE"</span>, <span class="lg-highlight-string">"results"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To perform a case-insensitive regex pattern matching, use the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-example-i-options" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
i
</code>
Option
</span>
</a>
instead. See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-example-i-options" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
i
</code>
Option
</span>
</a>
for an example.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-regexFindAll-captures-behavior">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
captures
</code>
Output Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#captures-output-behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="captures-output-behavior">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If your
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-regex" target="_self">
<span>
regex
</span>
</a>
pattern contains capture
groups and the pattern finds a match in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-input" target="_self">
<span>
input
</span>
</a>
, the
<code class="leafygreen-ui-1l06pbn">
captures
</code>
array in the results
corresponds to the groups captured by the matching string. Capture
groups are specified with unescaped parentheses
<code class="leafygreen-ui-1l06pbn">
()
</code>
in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-regex" target="_self">
<span>
regex
</span>
</a>
pattern. The length of the
<code class="leafygreen-ui-1l06pbn">
captures
</code>
array equals the number of capture groups in the pattern
and the order of the array matches the order in which the capture groups
appear.
</p>
<p class="leafygreen-ui-1kp3ins">
Create a sample collection named
<code class="leafygreen-ui-1l06pbn">
contacts
</code>
with the following
documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.contacts.insertMany([\n { \"_id\": 1, \"fname\": \"Carol\", \"lname\": \"Smith\", \"phone\": \"718-555-0113\" },\n { \"_id\": 2, \"fname\": \"Daryl\", \"lname\": \"Doe\", \"phone\": \"212-555-8832\" },\n { \"_id\": 3, \"fname\": \"Polly\", \"lname\": \"Andrews\", \"phone\": \"208-555-1932\" },\n { \"_id\": 4, \"fname\": \"Colleen\", \"lname\": \"Duncan\", \"phone\": \"775-555-0187\" },\n { \"_id\": 5, \"fname\": \"Luna\", \"lname\": \"Clarke\", \"phone\": \"917-555-4414\" }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">contacts</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"fname"</span>: <span class="lg-highlight-string">"Carol"</span>, <span class="lg-highlight-string">"lname"</span>: <span class="lg-highlight-string">"Smith"</span>, <span class="lg-highlight-string">"phone"</span>: <span class="lg-highlight-string">"718-555-0113"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"fname"</span>: <span class="lg-highlight-string">"Daryl"</span>, <span class="lg-highlight-string">"lname"</span>: <span class="lg-highlight-string">"Doe"</span>, <span class="lg-highlight-string">"phone"</span>: <span class="lg-highlight-string">"212-555-8832"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"fname"</span>: <span class="lg-highlight-string">"Polly"</span>, <span class="lg-highlight-string">"lname"</span>: <span class="lg-highlight-string">"Andrews"</span>, <span class="lg-highlight-string">"phone"</span>: <span class="lg-highlight-string">"208-555-1932"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span>: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"fname"</span>: <span class="lg-highlight-string">"Colleen"</span>, <span class="lg-highlight-string">"lname"</span>: <span class="lg-highlight-string">"Duncan"</span>, <span class="lg-highlight-string">"phone"</span>: <span class="lg-highlight-string">"775-555-0187"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span>: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"fname"</span>: <span class="lg-highlight-string">"Luna"</span>, <span class="lg-highlight-string">"lname"</span>: <span class="lg-highlight-string">"Clarke"</span>, <span class="lg-highlight-string">"phone"</span>: <span class="lg-highlight-string">"917-555-4414"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following pipeline applies the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-regex" target="_self">
<span>
regex
</span>
</a>
pattern
<code class="leafygreen-ui-1l06pbn">
/(C(ar)*)ol/
</code>
to the
<code class="leafygreen-ui-1l06pbn">
fname
</code>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.contacts.aggregate([\n {\n $project: {\n returnObject: {\n $regexFindAll: { input: \"$fname\", regex: /(C(ar)*)ol/ }\n }\n }\n }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">contacts</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$project</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">returnObject</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$fname"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/(C(ar)*)ol/</span> <!-- -->}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-regex" target="_self">
<span>
regex
</span>
</a>
pattern finds a match with
<code class="leafygreen-ui-1l06pbn">
fname
</code>
values
<code class="leafygreen-ui-1l06pbn">
Carol
</code>
and
<code class="leafygreen-ui-1l06pbn">
Colleen
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"returnObject\" : [ { \"match\" : \"Carol\", \"idx\" : 0, \"captures\" : [ \"Car\", \"ar\" ] } ] }\n{ \"_id\" : 2, \"returnObject\" : [ ] }\n{ \"_id\" : 3, \"returnObject\" : [ ] }\n{ \"_id\" : 4, \"returnObject\" : [ { \"match\" : \"Col\", \"idx\" : 0, \"captures\" : [ \"C\", null ] } ] }\n{ \"_id\" : 5, \"returnObject\" : [ ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"Carol"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"Car"</span>, <span class="lg-highlight-string">"ar"</span> ] } ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"Col"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"C"</span>, <span class="lg-highlight-literal">null</span> ] } ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The pattern contains the capture group
<code class="leafygreen-ui-1l06pbn">
(C(ar)*)
</code>
which contains the
nested group
<code class="leafygreen-ui-1l06pbn">
(ar)
</code>
. The elements in the
<code class="leafygreen-ui-1l06pbn">
captures
</code>
array correspond
to the two capture groups. If a matching document is not captured by a
group (e.g.
<code class="leafygreen-ui-1l06pbn">
Colleen
</code>
and the group
<code class="leafygreen-ui-1l06pbn">
(ar)
</code>
),
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-regexFindAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
</span>
</a>
replaces the group with a null placeholder.
</p>
<p class="leafygreen-ui-1kp3ins">
As shown in the previous example, the
<code class="leafygreen-ui-1l06pbn">
captures
</code>
array contains an
element for each capture group (using
<code class="leafygreen-ui-1l06pbn">
null
</code>
for non-captures).
Consider the following example which searches for phone numbers with
New York City area codes by applying a logical
<code class="leafygreen-ui-1l06pbn">
or
</code>
of capture
groups to the
<code class="leafygreen-ui-1l06pbn">
phone
</code>
field. Each group represents a New York City
area code:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.contacts.aggregate([\n {\n $project: {\n nycContacts: {\n $regexFindAll: { input: \"$phone\", regex: /^(718).*|^(212).*|^(917).*/ }\n }\n }\n }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">contacts</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$project</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">nycContacts</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$phone"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/^(718).*|^(212).*|^(917).*/</span> <!-- -->}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For documents which are matched by the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-regex" target="_self">
<span>
regex
</span>
</a>
pattern, the
<code class="leafygreen-ui-1l06pbn">
captures
</code>
array includes the matching capture group
and replaces any non-capturing groups with
<code class="leafygreen-ui-1l06pbn">
null
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"nycContacts\" : [ { \"match\" : \"718-555-0113\", \"idx\" : 0, \"captures\" : [ \"718\", null, null ] } ] }\n{ \"_id\" : 2, \"nycContacts\" : [ { \"match\" : \"212-555-8832\", \"idx\" : 0, \"captures\" : [ null, \"212\", null ] } ] }\n{ \"_id\" : 3, \"nycContacts\" : [ ] }\n{ \"_id\" : 4, \"nycContacts\" : [ ] }\n{ \"_id\" : 5, \"nycContacts\" : [ { \"match\" : \"917-555-4414\", \"idx\" : 0, \"captures\" : [ null, null, \"917\" ] } ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"nycContacts"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"718-555-0113"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"718"</span>, <span class="lg-highlight-literal">null</span>, <span class="lg-highlight-literal">null</span> ] } ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"nycContacts"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"212-555-8832"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-literal">null</span>, <span class="lg-highlight-string">"212"</span>, <span class="lg-highlight-literal">null</span> ] } ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"nycContacts"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"nycContacts"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"nycContacts"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"917-555-4414"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-literal">null</span>, <span class="lg-highlight-literal">null</span>, <span class="lg-highlight-string">"917"</span> ] } ] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
and Its Options
<a class="headerlink leafygreen-ui-1kepx47" href="#-regexfindall-and-its-options" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-regexfindall-and-its-options">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To illustrate the behavior of the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-regexFindAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
</span>
</a>
operator as
discussed in this example, create a sample collection
<code class="leafygreen-ui-1l06pbn">
products
</code>
with
the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.products.insertMany([\n { _id: 1, description: \"Single LINE description.\" },\n { _id: 2, description: \"First lines\\nsecond line\" },\n { _id: 3, description: \"Many spaces before line\" },\n { _id: 4, description: \"Multiple\\nline descriptions\" },\n { _id: 5, description: \"anchors, links and hyperlinks\" },\n { _id: 6, description: \"métier work vocation\" }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">products</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">description</span>: <span class="lg-highlight-string">"Single LINE description."</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">description</span>: <span class="lg-highlight-string">"First lines</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">second line"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">description</span>: <span class="lg-highlight-string">"Many spaces before line"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-attr">description</span>: <span class="lg-highlight-string">"Multiple</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">line descriptions"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-attr">description</span>: <span class="lg-highlight-string">"anchors, links and hyperlinks"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-attr">description</span>: <span class="lg-highlight-string">"métier work vocation"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
By default,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-regexFindAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
</span>
</a>
performs a case-sensitive match.
For example, the following aggregation performs a case-
<em>
sensitive
</em>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-regexFindAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
</span>
</a>
on the
<code class="leafygreen-ui-1l06pbn">
description
</code>
field. The regex
pattern
<code class="leafygreen-ui-1l06pbn">
/line/
</code>
does not specify any grouping:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.products.aggregate([\n { $addFields: { returnObject: { $regexFindAll: { input: \"$description\", regex: /line/ } } } }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">products</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addFields</span>: <!-- -->{ <span class="lg-highlight-attr">returnObject</span>: <!-- -->{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/line/</span> <!-- -->} } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : 1,\n \"description\" : \"Single LINE description.\",\n \"returnObject\" : [ ]\n}\n{\n \"_id\" : 2,\n \"description\" : \"First lines\\nsecond line\",\n \"returnObject\" : [ { \"match\" : \"line\", \"idx\" : 6, \"captures\" : [ ]}, { \"match\" : \"line\", \"idx\" : 19, \"captures\" : [ ] } ]\n}\n{\n \"_id\" : 3,\n \"description\" : \"Many spaces before line\",\n \"returnObject\" : [ { \"match\" : \"line\", \"idx\" : 23, \"captures\" : [ ] } ]\n}\n{\n \"_id\" : 4,\n \"description\" : \"Multiple\\nline descriptions\",\n \"returnObject\" : [ { \"match\" : \"line\", \"idx\" : 9, \"captures\" : [ ] }\n] }\n\n{\n \"_id\" : 5,\n \"description\" : \"anchors, links and hyperlinks\",\n \"returnObject\" : [ ]\n}\n{\n \"_id\" : 6,\n \"description\" : \"métier work vocation\",\n \"returnObject\" : [ ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Single LINE description."</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"First lines</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">second line"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->]}<!-- -->, <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">19</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Many spaces before line"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">23</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Multiple</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">line descriptions"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">9</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"anchors, links and hyperlinks"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">6</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"métier work vocation"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following regex pattern
<code class="leafygreen-ui-1l06pbn">
/lin(e|k)/
</code>
specifies a grouping
<code class="leafygreen-ui-1l06pbn">
(e|k)
</code>
in the pattern:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.products.aggregate([\n { $addFields: { returnObject: { $regexFindAll: { input: \"$description\", regex: /lin(e|k)/ } } } }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">products</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addFields</span>: <!-- -->{ <span class="lg-highlight-attr">returnObject</span>: <!-- -->{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/lin(e|k)/</span> <!-- -->} } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : 1,\n \"description\" : \"Single LINE description.\",\n \"returnObject\": [ ]\n}\n{\n \"_id\" : 2,\n \"description\" : \"First lines\\nsecond line\",\n \"returnObject\" : [ { \"match\" : \"line\", \"idx\" : 6, \"captures\" : [ \"e\" ] }, { \"match\" : \"line\", \"idx\" : 19, \"captures\" : [ \"e\" ] } ]\n}\n{\n \"_id\" : 3,\n \"description\" : \"Many spaces before line\",\n \"returnObject\" : [ { \"match\" : \"line\", \"idx\" : 23, \"captures\" : [ \"e\" ] } ]\n}\n{\n \"_id\" : 4,\n \"description\" : \"Multiple\\nline descriptions\",\n \"returnObject\" : [ { \"match\" : \"line\", \"idx\" : 9, \"captures\" : [ \"e\" ] } ]\n}\n{\n \"_id\" : 5,\n \"description\" : \"anchors, links and hyperlinks\",\n \"returnObject\" : [ { \"match\" : \"link\", \"idx\" : 9, \"captures\" : [ \"k\" ] }, { \"match\" : \"link\", \"idx\" : 24, \"captures\" : [ \"k\" ] } ]\n}\n{\n \"_id\" : 6,\n \"description\" : \"métier work vocation\",\n \"returnObject\" : [ ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Single LINE description."</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span>: <!-- -->[ <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"First lines</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">second line"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"e"</span> ] }<!-- -->, <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">19</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"e"</span> ] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Many spaces before line"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">23</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"e"</span> ] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Multiple</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">line descriptions"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">9</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"e"</span> ] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"anchors, links and hyperlinks"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"link"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">9</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"k"</span> ] }<!-- -->, <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"link"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">24</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"k"</span> ] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">6</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"métier work vocation"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
In the return option, the
<code class="leafygreen-ui-1l06pbn">
idx
</code>
field is the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="http://www.unicode.org/glossary/#code_point" rel="noopener noreferrer">
<span>
code point
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
index and not the byte
index. To illustrate, consider the following example that uses the
regex pattern
<code class="leafygreen-ui-1l06pbn">
/tier/
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.products.aggregate([\n { $addFields: { returnObject: { $regexFindAll: { input: \"$description\", regex: /tier/ } } } }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">products</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addFields</span>: <!-- -->{ <span class="lg-highlight-attr">returnObject</span>: <!-- -->{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/tier/</span> <!-- -->} } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following where only the last record
matches the pattern and the returned
<code class="leafygreen-ui-1l06pbn">
idx
</code>
is
<code class="leafygreen-ui-1l06pbn">
2
</code>
(instead of 3
if using a byte index)
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"description\" : \"Single LINE description.\", \"returnObject\" : [ ] }\n{ \"_id\" : 2, \"description\" : \"First lines\\nsecond line\", \"returnObject\" : [ ] }\n{ \"_id\" : 3, \"description\" : \"Many spaces before line\", \"returnObject\" : [ ] }\n{ \"_id\" : 4, \"description\" : \"Multiple\\nline descriptions\", \"returnObject\" : [ ] }\n{ \"_id\" : 5, \"description\" : \"anchors, links and hyperlinks\", \"returnObject\" : [ ] }\n{ \"_id\" : 6, \"description\" : \"métier work vocation\",\n \"returnObject\" : [ { \"match\" : \"tier\", \"idx\" : 2, \"captures\" : [ ] } ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Single LINE description."</span>, <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"First lines</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">second line"</span>, <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Many spaces before line"</span>, <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Multiple</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">line descriptions"</span>, <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"anchors, links and hyperlinks"</span>, <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"métier work vocation"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"tier"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-regexFindAll-example-i-options">
</span>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
<code class="leafygreen-ui-1l06pbn">
i
</code>
Option
<a class="headerlink leafygreen-ui-1kepx47" href="#i-option" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="i-option">
</div>
</a>
</h4>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
You cannot specify options in both the
<code class="leafygreen-ui-1l06pbn">
regex
</code>
and the
<code class="leafygreen-ui-1l06pbn">
options
</code>
field.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To perform case-
<em>
insensitive
</em>
pattern matching, include the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-options" target="_self">
<span>
i
</span>
</a>
option as part of the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-regex" target="_self">
<span>
regex
</span>
</a>
field or in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-options" target="_self">
<span>
options
</span>
</a>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"// Specify i as part of the regex field\n{ $regexFindAll: { input: \"$description\", regex: /line/i } }\n\n// Specify i in the options field\n{ $regexFindAll: { input: \"$description\", regex: /line/, options: \"i\" } }\n{ $regexFindAll: { input: \"$description\", regex: \"line\", options: \"i\" } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// Specify i as part of the regex field</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/line/i</span> <!-- -->} }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// Specify i</span><span class="lg-highlight-comment"> in the options </span><span class="lg-highlight-comment">field</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/line/</span>,<!-- --> <span class="lg-highlight-attr">options</span>: <span class="lg-highlight-string">"i"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-attr">options</span>: <span class="lg-highlight-string">"i"</span> } }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For example, the following aggregation performs a case-
<em>
insensitive
</em>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-regexFindAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
</span>
</a>
on the
<code class="leafygreen-ui-1l06pbn">
description
</code>
field. The regex
pattern
<code class="leafygreen-ui-1l06pbn">
/line/
</code>
does not specify any grouping:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.products.aggregate([\n { $addFields: { returnObject: { $regexFindAll: { input: \"$description\", regex: /line/i } } } }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">products</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addFields</span>: <!-- -->{ <span class="lg-highlight-attr">returnObject</span>: <!-- -->{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/line/i</span> <!-- -->} } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : 1,\n \"description\" : \"Single LINE description.\",\n \"returnObject\" : [ { \"match\" : \"LINE\", \"idx\" : 7, \"captures\" : [ ] } ]\n}\n{\n \"_id\" : 2,\n \"description\" : \"First lines\\nsecond line\",\n \"returnObject\" : [ { \"match\" : \"line\", \"idx\" : 6, \"captures\" : [ ] }, { \"match\" : \"line\", \"idx\" : 19, \"captures\" : [ ] } ]\n}\n{\n \"_id\" : 3,\n \"description\" : \"Many spaces before line\",\n \"returnObject\" : [ { \"match\" : \"line\", \"idx\" : 23, \"captures\" : [ ] } ]\n}\n{\n \"_id\" : 4,\n \"description\" : \"Multiple\\nline descriptions\",\n \"returnObject\" : [ { \"match\" : \"line\", \"idx\" : 9, \"captures\" : [ ] } ]\n}\n{\n \"_id\" : 5,\n \"description\" : \"anchors, links and hyperlinks\",\n \"returnObject\" : [ ]\n}\n{ \"_id\" : 6, \"description\" : \"métier work vocation\", \"returnObject\" : [ ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Single LINE description."</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"LINE"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">7</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"First lines</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">second line"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] }<!-- -->, <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">19</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Many spaces before line"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">23</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Multiple</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">line descriptions"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">9</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"anchors, links and hyperlinks"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"métier work vocation"</span>, <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
<code class="leafygreen-ui-1l06pbn">
m
</code>
Option
<a class="headerlink leafygreen-ui-1kepx47" href="#m-option" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="m-option">
</div>
</a>
</h4>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
You cannot specify options in both the
<code class="leafygreen-ui-1l06pbn">
regex
</code>
and the
<code class="leafygreen-ui-1l06pbn">
options
</code>
field.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To match the specified anchors (e.g.
<code class="leafygreen-ui-1l06pbn">
^
</code>
,
<code class="leafygreen-ui-1l06pbn">
$
</code>
) for each line of a
multiline string, include the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-options" target="_self">
<span>
m
</span>
</a>
option
as part of the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-regex" target="_self">
<span>
regex
</span>
</a>
field or in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-options" target="_self">
<span>
options
</span>
</a>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"// Specify m as part of the regex field\n{ $regexFindAll: { input: \"$description\", regex: /line/m } }\n\n// Specify m in the options field\n{ $regexFindAll: { input: \"$description\", regex: /line/, options: \"m\" } }\n{ $regexFindAll: { input: \"$description\", regex: \"line\", options: \"m\" } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// Specify m as part of the regex field</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/line/m</span> <!-- -->} }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// Specify m</span><span class="lg-highlight-comment"> in the options </span><span class="lg-highlight-comment">field</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/line/</span>,<!-- --> <span class="lg-highlight-attr">options</span>: <span class="lg-highlight-string">"m"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-attr">options</span>: <span class="lg-highlight-string">"m"</span> } }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following example includes both the
<code class="leafygreen-ui-1l06pbn">
i
</code>
and the
<code class="leafygreen-ui-1l06pbn">
m
</code>
options to
match lines starting with either the letter
<code class="leafygreen-ui-1l06pbn">
s
</code>
or
<code class="leafygreen-ui-1l06pbn">
S
</code>
for
multiline strings:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.products.aggregate([\n { $addFields: { returnObject: { $regexFindAll: { input: \"$description\", regex: /^s/im } } } }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">products</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addFields</span>: <!-- -->{ <span class="lg-highlight-attr">returnObject</span>: <!-- -->{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/^s/im</span> <!-- -->} } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : 1,\n \"description\" : \"Single LINE description.\",\n \"returnObject\" : [ { \"match\" : \"S\", \"idx\" : 0, \"captures\" : [ ] } ]\n}\n{\n \"_id\" : 2,\n \"description\" : \"First lines\\nsecond line\",\n \"returnObject\" : [ { \"match\" : \"s\", \"idx\" : 12, \"captures\" : [ ] } ]\n}\n{\n \"_id\" : 3,\n \"description\" : \"Many spaces before line\",\n \"returnObject\" : [ ]\n}\n{\n \"_id\" : 4,\n \"description\" : \"Multiple\\nline descriptions\",\n \"returnObject\" : [ ]\n}\n{\n \"_id\" : 5,\n \"description\" : \"anchors, links and hyperlinks\",\n \"returnObject\" : [ ]\n}\n{ \"_id\" : 6, \"description\" : \"métier work vocation\", \"returnObject\" : [ ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Single LINE description."</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"S"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"First lines</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">second line"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"s"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">12</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Many spaces before line"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Multiple</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">line descriptions"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"anchors, links and hyperlinks"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"métier work vocation"</span>, <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
<code class="leafygreen-ui-1l06pbn">
x
</code>
Option
<a class="headerlink leafygreen-ui-1kepx47" href="#x-option" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="x-option">
</div>
</a>
</h4>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
You cannot specify options in both the
<code class="leafygreen-ui-1l06pbn">
regex
</code>
and the
<code class="leafygreen-ui-1l06pbn">
options
</code>
field.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To ignore all unescaped white space characters and comments (denoted by
the un-escaped hash
<code class="leafygreen-ui-1l06pbn">
#
</code>
character and the next new-line character) in
the pattern, include the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-options" target="_self">
<span>
s
</span>
</a>
option in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-options" target="_self">
<span>
options
</span>
</a>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"// Specify x in the options field\n{ $regexFindAll: { input: \"$description\", regex: /line/, options: \"x\" } }\n{ $regexFindAll: { input: \"$description\", regex: \"line\", options: \"x\" } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// Specify x</span><span class="lg-highlight-comment"> in the options </span><span class="lg-highlight-comment">field</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/line/</span>,<!-- --> <span class="lg-highlight-attr">options</span>: <span class="lg-highlight-string">"x"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-attr">options</span>: <span class="lg-highlight-string">"x"</span> } }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following example includes the
<code class="leafygreen-ui-1l06pbn">
x
</code>
option to skip unescaped white
spaces and comments:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.products.aggregate([\n { $addFields: { returnObject: { $regexFindAll: { input: \"$description\", regex: /lin(e|k) # matches line or link/, options:\"x\" } } } }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">products</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addFields</span>: <!-- -->{ <span class="lg-highlight-attr">returnObject</span>: <!-- -->{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/lin(e|k) # matches line or link/</span>,<!-- --> <span class="lg-highlight-attr">options</span>:<span class="lg-highlight-string">"x"</span> } } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : 1,\n \"description\" : \"Single LINE description.\",\n \"returnObject\" : [ ]\n}\n{\n \"_id\" : 2,\n \"description\" : \"First lines\\nsecond line\",\n \"returnObject\" : [ { \"match\" : \"line\", \"idx\" : 6, \"captures\" : [ \"e\" ] }, { \"match\" : \"line\", \"idx\" : 19, \"captures\" : [ \"e\" ] } ]\n}\n{\n \"_id\" : 3,\n \"description\" : \"Many spaces before line\",\n \"returnObject\" : [ { \"match\" : \"line\", \"idx\" : 23, \"captures\" : [ \"e\" ] } ]\n}\n{\n \"_id\" : 4,\n \"description\" : \"Multiple\\nline descriptions\",\n \"returnObject\" : [ { \"match\" : \"line\", \"idx\" : 9, \"captures\" : [ \"e\" ] } ]\n}\n{\n \"_id\" : 5,\n \"description\" : \"anchors, links and hyperlinks\",\n \"returnObject\" : [ { \"match\" : \"link\", \"idx\" : 9, \"captures\" : [ \"k\" ] }, { \"match\" : \"link\", \"idx\" : 24, \"captures\" : [ \"k\" ] } ]\n}\n{ \"_id\" : 6, \"description\" : \"métier work vocation\", \"returnObject\" : [ ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Single LINE description."</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"First lines</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">second line"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"e"</span> ] }<!-- -->, <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">19</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"e"</span> ] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Many spaces before line"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">23</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"e"</span> ] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Multiple</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">line descriptions"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">9</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"e"</span> ] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"anchors, links and hyperlinks"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"link"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">9</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"k"</span> ] }<!-- -->, <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"link"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">24</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"k"</span> ] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"métier work vocation"</span>, <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
<code class="leafygreen-ui-1l06pbn">
s
</code>
Option
<a class="headerlink leafygreen-ui-1kepx47" href="#s-option" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="s-option">
</div>
</a>
</h4>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
You cannot specify options in both the
<code class="leafygreen-ui-1l06pbn">
regex
</code>
and the
<code class="leafygreen-ui-1l06pbn">
options
</code>
field.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To allow the dot character (i.e.
<code class="leafygreen-ui-1l06pbn">
.
</code>
) in the pattern to match all
characters including the new line character, include the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-options" target="_self">
<span>
s
</span>
</a>
option in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-options" target="_self">
<span>
options
</span>
</a>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"// Specify s in the options field\n{ $regexFindAll: { input: \"$description\", regex: /m.*line/, options: \"s\" } }\n{ $regexFindAll: { input: \"$description\", regex: \"m.*line\", options: \"s\" } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// Specify s</span><span class="lg-highlight-comment"> in the options </span><span class="lg-highlight-comment">field</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/m.*line/</span>,<!-- --> <span class="lg-highlight-attr">options</span>: <span class="lg-highlight-string">"s"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-string">"m.*line"</span>, <span class="lg-highlight-attr">options</span>: <span class="lg-highlight-string">"s"</span> } }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following example includes the
<code class="leafygreen-ui-1l06pbn">
s
</code>
option to allow the dot
character (i.e. .) to match all characters including new line as well
as the
<code class="leafygreen-ui-1l06pbn">
i
</code>
option to perform a case-insensitive match:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.products.aggregate([\n { $addFields: { returnObject: { $regexFindAll: { input: \"$description\", regex:/m.*line/, options: \"si\" } } } }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">products</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addFields</span>: <!-- -->{ <span class="lg-highlight-attr">returnObject</span>: <!-- -->{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$description"</span>, <span class="lg-highlight-attr">regex</span>:<span class="lg-highlight-regexp">/m.*line/</span>,<!-- --> <span class="lg-highlight-attr">options</span>: <span class="lg-highlight-string">"si"</span> } } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : 1,\n \"description\" : \"Single LINE description.\",\n \"returnObject\" : [ ]\n}\n{\n \"_id\" : 2,\n \"description\" : \"First lines\\nsecond line\",\n \"returnObject\" : [ ]\n}\n{\n \"_id\" : 3,\n \"description\" : \"Many spaces before line\",\n \"returnObject\" : [ { \"match\" : \"Many spaces before line\", \"idx\" : 0, \"captures\" : [ ] } ]\n}\n{\n \"_id\" : 4,\n \"description\" : \"Multiple\\nline descriptions\",\n \"returnObject\" : [ { \"match\" : \"Multiple\\nline\", \"idx\" : 0, \"captures\" : [ ] } ]\n}\n{\n \"_id\" : 5,\n \"description\" : \"anchors, links and hyperlinks\",\n \"returnObject\" : [ ]\n}\n{ \"_id\" : 6, \"description\" : \"métier work vocation\", \"returnObject\" : [ ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Single LINE description."</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"First lines</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">second line"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Many spaces before line"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"Many spaces before line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"Multiple</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">line descriptions"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"Multiple</span><span class="lg-highlight-string">\n</span><span class="lg-highlight-string">line"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"anchors, links and hyperlinks"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"description"</span> <!-- -->: <span class="lg-highlight-string">"métier work vocation"</span>, <span class="lg-highlight-string">"returnObject"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Use
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
to Parse Email from String
<a class="headerlink leafygreen-ui-1kepx47" href="#use--regexfindall-to-parse-email-from-string" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="use--regexfindall-to-parse-email-from-string">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Create a sample collection
<code class="leafygreen-ui-1l06pbn">
feedback
</code>
with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.feedback.insertMany([\n { \"_id\" : 1, comment: \"Hi, I'm just reading about MongoDB -- [email protected]\" },\n { \"_id\" : 2, comment: \"I wanted to concatenate a string\" },\n { \"_id\" : 3, comment: \"How do I convert a date to string? Contact me at either [email protected] or [email protected]\" },\n { \"_id\" : 4, comment: \"It's just me. I'm testing. [email protected]\" }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">feedback</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">comment</span>: <span class="lg-highlight-string">"Hi, I'm just reading about MongoDB -- [email protected]"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">comment</span>: <span class="lg-highlight-string">"I wanted to concatenate a string"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">comment</span>: <span class="lg-highlight-string">"How do I convert a date to string? Contact me at either [email protected] or [email protected]"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-attr">comment</span>: <span class="lg-highlight-string">"It's just me. I'm testing. [email protected]"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following aggregation uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-regexFindAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
</span>
</a>
to extract
all emails from the
<code class="leafygreen-ui-1l06pbn">
comment
</code>
field (case insensitive).
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.feedback.aggregate( [\n { $addFields: {\n \"email\": { $regexFindAll: { input: \"$comment\", regex: /[a-z0-9_.+-]+@[a-z0-9_.+-]+\\.[a-z0-9_.+-]+/i } }\n } },\n { $set: { email: \"$email.match\"} }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">feedback</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addFields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"email"</span>: <!-- -->{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$comment"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/</span><span class="lg-highlight-regexp">[a-z0-9_.+-]</span><span class="lg-highlight-regexp">+@</span><span class="lg-highlight-regexp">[a-z0-9_.+-]</span><span class="lg-highlight-regexp">+</span><span class="lg-highlight-regexp">\.</span><span class="lg-highlight-regexp">[a-z0-9_.+-]</span><span class="lg-highlight-regexp">+/i</span> <!-- -->} }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">email</span>: <span class="lg-highlight-string">"$email.match"</span>} }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<dl>
<dt>
First Stage
</dt>
<dd class="css-1ufxuu7">
<p class="leafygreen-ui-1kp3ins">
The stage uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/addFields/#mongodb-pipeline-pipe.-addFields">
<code class="leafygreen-ui-1l06pbn">
$addFields
</code>
</a>
stage to add a new field
<code class="leafygreen-ui-1l06pbn">
email
</code>
to the document. The new field is an array that contains
the result of performing the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-regexFindAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
</span>
</a>
on the
<code class="leafygreen-ui-1l06pbn">
comment
</code>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"comment\" : \"Hi, I'm just reading about MongoDB -- [email protected]\", \"email\" : [ { \"match\" : \"[email protected]\", \"idx\" : 38, \"captures\" : [ ] } ] }\n{ \"_id\" : 2, \"comment\" : \"I wanted to concatenate a string\", \"email\" : [ ] }\n{ \"_id\" : 3, \"comment\" : \"How do I convert a date to string? Contact me at either [email protected] or [email protected]\", \"email\" : [ { \"match\" : \"[email protected]\", \"idx\" : 56, \"captures\" : [ ] }, { \"match\" : \"[email protected]\", \"idx\" : 75, \"captures\" : [ ] } ] }\n{ \"_id\" : 4, \"comment\" : \"It's just me. I'm testing. [email protected]\", \"email\" : [ { \"match\" : \"[email protected]\", \"idx\" : 28, \"captures\" : [ ] } ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"Hi, I'm just reading about MongoDB -- [email protected]"</span>, <span class="lg-highlight-string">"email"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"[email protected]"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">38</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"I wanted to concatenate a string"</span>, <span class="lg-highlight-string">"email"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"How do I convert a date to string? Contact me at either [email protected] or [email protected]"</span>, <span class="lg-highlight-string">"email"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"[email protected]"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">56</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] }<!-- -->, <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"[email protected]"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">75</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"It's just me. I'm testing. [email protected]"</span>, <span class="lg-highlight-string">"email"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"[email protected]"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">28</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <!-- -->] } ] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</dd>
<dt>
Second Stage
</dt>
<dd class="css-1ufxuu7">
<p class="leafygreen-ui-1kp3ins">
The stage use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/set/#mongodb-pipeline-pipe.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
stage to reset the
<code class="leafygreen-ui-1l06pbn">
email
</code>
array elements to
the
<code class="leafygreen-ui-1l06pbn">
"email.match"
</code>
value(s). If the current value of
<code class="leafygreen-ui-1l06pbn">
email
</code>
is null, the new value of
<code class="leafygreen-ui-1l06pbn">
email
</code>
is set to null.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"comment\" : \"Hi, I'm just reading about MongoDB -- [email protected]\", \"email\" : [ \"[email protected]\" ] }\n{ \"_id\" : 2, \"comment\" : \"I wanted to concatenate a string\", \"email\" : [ ] }\n{ \"_id\" : 3, \"comment\" : \"How do I convert a date to string? Contact me at either [email protected] or [email protected]\", \"email\" : [ \"[email protected]\", \"[email protected]\" ] }\n{ \"_id\" : 4, \"comment\" : \"It's just me. I'm testing. [email protected]\", \"email\" : [ \"[email protected]\" ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"Hi, I'm just reading about MongoDB -- [email protected]"</span>, <span class="lg-highlight-string">"email"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"[email protected]"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"I wanted to concatenate a string"</span>, <span class="lg-highlight-string">"email"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"How do I convert a date to string? Contact me at either [email protected] or [email protected]"</span>, <span class="lg-highlight-string">"email"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"[email protected]"</span>, <span class="lg-highlight-string">"[email protected]"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"It's just me. I'm testing. [email protected]"</span>, <span class="lg-highlight-string">"email"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"[email protected]"</span> ] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</dd>
</dl>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Use Captured Groupings to Parse User Name
<a class="headerlink leafygreen-ui-1kepx47" href="#use-captured-groupings-to-parse-user-name" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="use-captured-groupings-to-parse-user-name">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Create a sample collection
<code class="leafygreen-ui-1l06pbn">
feedback
</code>
with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.feedback.insertMany([\n { \"_id\" : 1, comment: \"Hi, I'm just reading about MongoDB -- [email protected]\" },\n { \"_id\" : 2, comment: \"I wanted to concatenate a string\" },\n { \"_id\" : 3, comment: \"How do I convert a date to string? Contact me at either [email protected] or [email protected]\" },\n { \"_id\" : 4, comment: \"It's just me. I'm testing. [email protected]\" }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">feedback</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">comment</span>: <span class="lg-highlight-string">"Hi, I'm just reading about MongoDB -- [email protected]"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">comment</span>: <span class="lg-highlight-string">"I wanted to concatenate a string"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">comment</span>: <span class="lg-highlight-string">"How do I convert a date to string? Contact me at either [email protected] or [email protected]"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-attr">comment</span>: <span class="lg-highlight-string">"It's just me. I'm testing. [email protected]"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To reply to the feedback, assume you want to parse the local-part of
the email address to use as the name in the greetings. Using the
<code class="leafygreen-ui-1l06pbn">
captured
</code>
field returned in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-regexFindAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
</span>
</a>
results,
you can parse out the local part of each email address:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.feedback.aggregate( [\n { $addFields: {\n \"names\": { $regexFindAll: { input: \"$comment\", regex: /([a-z0-9_.+-]+)@[a-z0-9_.+-]+\\.[a-z0-9_.+-]+/i } },\n } },\n { $set: { names: { $reduce: { input: \"$names.captures\", initialValue: [ ], in: { $concatArrays: [ \"$$value\", \"$$this\" ] } } } } }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">feedback</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$addFields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"names"</span>: <!-- -->{ <span class="lg-highlight-attr">$regexFindAll</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$comment"</span>, <span class="lg-highlight-attr">regex</span>: <span class="lg-highlight-regexp">/(</span><span class="lg-highlight-regexp">[a-z0-9_.+-]</span><span class="lg-highlight-regexp">+)@</span><span class="lg-highlight-regexp">[a-z0-9_.+-]</span><span class="lg-highlight-regexp">+</span><span class="lg-highlight-regexp">\.</span><span class="lg-highlight-regexp">[a-z0-9_.+-]</span><span class="lg-highlight-regexp">+/i</span> <!-- -->} }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->} }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">names</span>: <!-- -->{ <span class="lg-highlight-attr">$reduce</span>: <!-- -->{ <span class="lg-highlight-attr">input</span>: <span class="lg-highlight-string">"$names.captures"</span>, <span class="lg-highlight-attr">initialValue</span>: <!-- -->[ <!-- -->]<!-- -->, <span class="lg-highlight-attr">in</span>: <!-- -->{ <span class="lg-highlight-attr">$concatArrays</span>: <!-- -->[ <span class="lg-highlight-string">"$$value"</span>, <span class="lg-highlight-string">"$$this"</span> ] } } } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<dl>
<dt>
First Stage
</dt>
<dd class="css-1ufxuu7">
<p class="leafygreen-ui-1kp3ins">
The stage uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/addFields/#mongodb-pipeline-pipe.-addFields">
<code class="leafygreen-ui-1l06pbn">
$addFields
</code>
</a>
stage to add a new field
<code class="leafygreen-ui-1l06pbn">
names
</code>
to the document. The new field contains the result of
performing the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-regexFindAll" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$regexFindAll
</code>
</span>
</a>
on the
<code class="leafygreen-ui-1l06pbn">
comment
</code>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : 1,\n \"comment\" : \"Hi, I'm just reading about MongoDB -- [email protected]\",\n \"names\" : [ { \"match\" : \"[email protected]\", \"idx\" : 38, \"captures\" : [ \"aunt.arc.tica\" ] } ]\n}\n\n{ \"_id\" : 2, \"comment\" : \"I wanted to concatenate a string\", \"names\" : [ ] }\n{\n \"_id\" : 3,\n \"comment\" : \"How do I convert a date to string? Contact me at either [email protected] or [email protected]\",\n \"names\" : [\n { \"match\" : \"[email protected]\", \"idx\" : 56, \"captures\" : [ \"cam\" ] },\n { \"match\" : \"[email protected]\", \"idx\" : 75, \"captures\" : [ \"c.dia\" ] }\n ]\n}\n{\n \"_id\" : 4,\n \"comment\" : \"It's just me. I'm testing. [email protected]\",\n \"names\" : [ { \"match\" : \"[email protected]\", \"idx\" : 28, \"captures\" : [ \"fred\" ] } ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"Hi, I'm just reading about MongoDB -- [email protected]"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"names"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"[email protected]"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">38</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"aunt.arc.tica"</span> ] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"I wanted to concatenate a string"</span>, <span class="lg-highlight-string">"names"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"How do I convert a date to string? Contact me at either [email protected] or [email protected]"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"names"</span> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"[email protected]"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">56</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"cam"</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"[email protected]"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">75</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"c.dia"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"It's just me. I'm testing. [email protected]"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"names"</span> <!-- -->: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"match"</span> <!-- -->: <span class="lg-highlight-string">"[email protected]"</span>, <span class="lg-highlight-string">"idx"</span> <!-- -->: <span class="lg-highlight-number">28</span>, <span class="lg-highlight-string">"captures"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"fred"</span> ] } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</dd>
<dt>
Second Stage
</dt>
<dd class="css-1ufxuu7">
<p class="leafygreen-ui-1kp3ins">
The stage use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/set/#mongodb-pipeline-pipe.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
stage with the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/reduce/#mongodb-expression-exp.-reduce">
<code class="leafygreen-ui-1l06pbn">
$reduce
</code>
</a>
operator to reset
<code class="leafygreen-ui-1l06pbn">
names
</code>
to an array that contains
the
<code class="leafygreen-ui-1l06pbn">
"$names.captures"
</code>
elements.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : 1,\n \"comment\" : \"Hi, I'm just reading about MongoDB -- [email protected]\",\n \"names\" : [ \"aunt.arc.tica\" ]\n}\n{ \"_id\" : 2, \"comment\" : \"I wanted to concatenate a string\", \"names\" : [ ] }\n{\n \"_id\" : 3,\n \"comment\" : \"How do I convert a date to string? Contact me at either [email protected] or [email protected]\",\n \"names\" : [ \"cam\", \"c.dia\" ]\n}\n{\n \"_id\" : 4,\n \"comment\" : \"It's just me. I'm testing. [email protected]\",\n \"names\" : [ \"fred\" ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"Hi, I'm just reading about MongoDB -- [email protected]"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"names"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"aunt.arc.tica"</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"I wanted to concatenate a string"</span>, <span class="lg-highlight-string">"names"</span> <!-- -->: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"How do I convert a date to string? Contact me at either [email protected] or [email protected]"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"names"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"cam"</span>, <span class="lg-highlight-string">"c.dia"</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"comment"</span> <!-- -->: <span class="lg-highlight-string">"It's just me. I'm testing. [email protected]"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"names"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"fred"</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</dd>
</dl>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
For more information on the behavior of the
<code class="leafygreen-ui-1l06pbn">
captures
</code>
array and
additional examples, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-regexFindAll-captures-behavior" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
captures
</code>
Output Behavior
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/cursor.objsLeftInBatch/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
cursor.objsLeftInBatch()
<a class="headerlink leafygreen-ui-1kepx47" href="#cursor.objsleftinbatch--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="cursor.objsleftinbatch--">
</div>
</a>
</h1>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
cursor.objsLeftInBatch()
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-cursor.objsLeftInBatch" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-cursor.objsLeftInBatch">
</div>
</a>
</dt>
<dd>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
mongosh Method
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This page documents a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
method. This is
<em>
not
</em>
the documentation for a language-specific driver, such as Node.js.
</p>
<p class="leafygreen-ui-1kp3ins">
For MongoDB API drivers, refer to the language-specific
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
MongoDB driver documentation
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.objsLeftInBatch" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
cursor.objsLeftInBatch()
</code>
</span>
</a>
returns the number of
documents remaining in the current batch.
</p>
<p class="leafygreen-ui-1kp3ins">
The MongoDB instance returns response in batches. To retrieve
all the documents from a cursor may require multiple batch
responses from the MongoDB instance. When there are no more
documents remaining in the current batch, the cursor will retrieve
another batch to get more documents until the cursor exhausts.
</p>
</dd>
</dl>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/BSONRegExp/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
BSONRegExp()
<a class="headerlink leafygreen-ui-1kepx47" href="#bsonregexp--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="bsonregexp--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Creates a new
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-bson-types">
BSON type
</a>
for a regular expression.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
BSONRegExp
</code>
has the following syntax:
</p>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
BSONRegExp("<pattern>, "<flags>")
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-BSONRegExp" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-BSONRegExp">
</div>
</a>
</dt>
<dd>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:60%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Parameter
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
pattern
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The regular expression pattern. You must not wrap the pattern
with delimiter characters.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
flag
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The regular expression flags. Characters in this argument are
sorted alphabetically.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</dd>
</dl>
<span class="leafygreen-ui-1qnjd6d" id="std-label-bsonRegExp-examples">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Insert a
<code class="leafygreen-ui-1l06pbn">
BSONRegExp()
</code>
Object
<a class="headerlink leafygreen-ui-1kepx47" href="#insert-a-bsonregexp---object" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="insert-a-bsonregexp---object">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Use the
<code class="leafygreen-ui-1l06pbn">
BSONRegExp()
</code>
constructor to create the BSON regular expression.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"var bsonRegExp = BSONRegExp(\"(?-i)AA_\", \"i\")","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> bsonRegExp <!-- -->= <span class="lg-highlight-title lg-highlight-class">BSONRegExp</span>(<span class="lg-highlight-string">"(?-i)AA_"</span>, <span class="lg-highlight-string">"i"</span>)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Insert the object into the
<code class="leafygreen-ui-1l06pbn">
testbson
</code>
collection.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.testbson.insertOne( { foo: bsonRegExp } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">testbson</span>.<span class="lg-highlight-title lg-highlight-function">insertOne</span>( <!-- -->{ <span class="lg-highlight-attr">foo</span>: <!-- -->bsonRegExp } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Retrieve a
<code class="leafygreen-ui-1l06pbn">
BSONRegExp()
</code>
Object
<a class="headerlink leafygreen-ui-1kepx47" href="#retrieve-a-bsonregexp---object" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="retrieve-a-bsonregexp---object">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Query the
<code class="leafygreen-ui-1l06pbn">
testbson
</code>
collection for the inserted document.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.testbson.find( {}, {}, { bsonRegExp: true } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">testbson</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{<!-- -->}<!-- -->, <!-- -->{<!-- -->}<!-- -->, <!-- -->{ <span class="lg-highlight-attr">bsonRegExp</span>: <span class="lg-highlight-literal">true</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
You can see the binary BSON regular expressions stored in the collection.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[\n {\n _id: ObjectId('65e8ba8a4b3c33a76e6cacca'),\n foo: BSONRegExp('(?-i)AA_', 'i')\n }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">'65e8ba8a4b3c33a76e6cacca'</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">foo</span>: <span class="lg-highlight-title lg-highlight-class">BSONRegExp</span>(<span class="lg-highlight-string">'(?-i)AA_'</span>, <span class="lg-highlight-string">'i'</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
If you set
<code class="leafygreen-ui-1l06pbn">
bsonRegExp
</code>
to
<code class="leafygreen-ui-1l06pbn">
false
</code>
,
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
returns an error:
</p>
<div class="css-1f5771r">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.testbson.find( {}, {}, { bsonRegExp: false })","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">testbson</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{<!-- -->}<!-- -->, <!-- -->{<!-- -->}<!-- -->, <!-- -->{ <span class="lg-highlight-attr">bsonRegExp</span>: <span class="lg-highlight-literal">false</span> })</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="css-9st569 efa38qy0" style="--border-color:#E8EDEB">
<button aria-disabled="false" class="lg-ui-button-0000 leafygreen-ui-hix6y6" data-lgid="lg-button" role="button" type="button">
<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg alt="" aria-hidden="true" class="leafygreen-ui-hjnzs9" fill="none" height="16" role="presentation" viewbox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg">
<path clip-rule="evenodd" d="M14.364 10.778a1 1 0 0 0 0-1.414l-4.95-4.95-.707-.707a1 1 0 0 0-1.414 0l-.707.707-4.95 4.95a1 1 0 0 0 0 1.414l.707.707a1 1 0 0 0 1.414 0L8 7.243l4.243 4.242a1 1 0 0 0 1.414 0l.707-.707Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
HIDE OUTPUT
</div>
</button>
</div>
<div class="leafygreen-ui-1oteowz">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"Uncaught:\nSyntaxError: Invalid regular expression: /(?-i)AA_/i: Invalid group","programmingLanguage":"JavaScript"}
</script>
<div class="css-1sax7hu e11q6jfk0" style="--code-container-border:initial;--code-pre-border:none">
<div class="leafygreen-ui-1fyvhqe">
<div class="leafygreen-ui-1ij019s">
<pre class="leafygreen-ui-12cejcz" tabindex="0"><code class="lg-highlight-hljs-dark javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">Uncaught</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">SyntaxError</span>: <span class="lg-highlight-title lg-highlight-class">Invalid</span> regular <span class="lg-highlight-attr">expression</span>: <span class="lg-highlight-regexp">/(?-i)AA_/i</span>: <span class="lg-highlight-title lg-highlight-class">Invalid</span> group</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/command/update/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
update
<a class="headerlink leafygreen-ui-1kepx47" href="#update" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="update">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#command-fields" target="_self">
<span>
Command Fields
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#access-control" target="_self">
<span>
Access Control
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#output" target="_self">
<span>
Output
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="dbcommand">
<dt>
<code class="leafygreen-ui-1l06pbn">
update
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-dbcommand-dbcmd.update" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-dbcommand-dbcmd.update">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
command modifies documents in a collection.
A single
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
command can contain multiple update
statements.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
In
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#std-program-mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
, this command can also be run through the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.updateOne/#mongodb-method-db.collection.updateOne">
<code class="leafygreen-ui-1l06pbn">
updateOne()
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.updateMany/#mongodb-method-db.collection.updateMany">
<code class="leafygreen-ui-1l06pbn">
updateMany()
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.replaceOne/#mongodb-method-db.collection.replaceOne">
<code class="leafygreen-ui-1l06pbn">
replaceOne()
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.findOneAndReplace/#mongodb-method-db.collection.findOneAndReplace">
<code class="leafygreen-ui-1l06pbn">
findOneAndReplace()
</code>
</a>
, and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.findOneAndUpdate/#mongodb-method-db.collection.findOneAndUpdate">
<code class="leafygreen-ui-1l06pbn">
findOneAndUpdate()
</code>
</a>
helper methods
<!-- -->
.
</p>
<p class="leafygreen-ui-1kp3ins">
Helper methods are convenient for
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#std-program-mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
users, but they may not
return the same level of information as database commands. In cases where
the convenience is not needed or the additional return fields are required,
use the database command.
</p>
</div>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This command is available in deployments hosted in the following environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This command is supported in all MongoDB Atlas clusters.
For information on Atlas support for all commands, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/" target="_self">
<span>
Unsupported Commands
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
The command has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n update: <collection>,\n updates: [\n {\n q: <query>,\n u: <document>,\n c: <document>, // Added in MongoDB 5.0\n upsert: <boolean>,\n multi: <boolean>,\n collation: <document>,\n arrayFilters: <array>,\n hint: <document|string>\n },\n ...\n ],\n ordered: <boolean>,\n maxTimeMS: <integer>,\n writeConcern: { <write> },\n bypassDocumentValidation: <boolean>,\n comment: <any>,\n let: <document> // Added in MongoDB 5.0\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <<!-- -->collection<!-- -->><!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">q</span>: <<!-- -->query<!-- -->><!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">u</span>: <!-- --><document or pipeline>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> c: <document>, // Added in MongoDB 5.0</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> upsert: <boolean>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> multi: <boolean>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> collation: <document>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> arrayFilters: <array>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> hint: <document|string></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ordered: <boolean>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> maxTimeMS: <integer>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> writeConcern: { <write concern> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> bypassDocumentValidation: <boolean>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> comment: <any>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> let: <document> // Added in MongoDB 5.0</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</button>
</div>
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</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Command Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#command-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="command-fields">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The command takes the following fields:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The name of the target collection.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
updates
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
An array of one or more update statements to perform on the named
collection. For details of the update statements, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-statement-documents" target="_self">
<span>
Update
Statements
<!-- -->
.
</span>
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ordered
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Optional. If
<code class="leafygreen-ui-1l06pbn">
true
</code>
, then when an update statement fails, return without
performing the remaining update statements. If
<code class="leafygreen-ui-1l06pbn">
false
</code>
, then when
an update fails, continue with the remaining update statements, if
any. Defaults to
<code class="leafygreen-ui-1l06pbn">
true
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
maxTimeMS
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
non-negative integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional.
</p>
<p class="leafygreen-ui-1kp3ins">
Specifies a time limit in milliseconds.
If you do not specify a value for
<code class="leafygreen-ui-1l06pbn">
maxTimeMS
</code>
, operations will not time out.
A value of
<code class="leafygreen-ui-1l06pbn">
0
</code>
explicitly specifies the default unbounded behavior.
</p>
<p class="leafygreen-ui-1kp3ins">
MongoDB terminates operations that exceed their allotted time limit
using the same mechanism as
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.killOp/#mongodb-method-db.killOp">
<code class="leafygreen-ui-1l06pbn">
db.killOp()
</code>
</a>
. MongoDB only
terminates an operation at one of its designated
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-interrupt-point">
interrupt
points
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
writeConcern
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. A document expressing the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#std-label-write-concern">
write concern
</a>
of the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
command. Omit to use the default write
concern.
</p>
<p class="leafygreen-ui-1kp3ins">
Do not explicitly set the write concern for the operation if run in
a transaction. To use write concern with transactions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions-write-concern">
Transactions and Write Concern
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
bypassDocumentValidation
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Optional. Enables
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
to bypass document validation
during the operation. This lets you update documents that do not
meet the validation requirements.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
comment
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
any
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. A user-provided comment to attach to this command. Once set, this
comment appears alongside records of this command in the following
locations:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/log-messages/#std-label-log-messages-ref">
mongod log messages
</a>
, in the
<code class="leafygreen-ui-1l06pbn">
attr.command.cursor.comment
</code>
field.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/database-profiler/#std-label-profiler">
Database profiler
</a>
output, in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/database-profiler/#mongodb-data-system.profile.command">
<code class="leafygreen-ui-1l06pbn">
command.comment
</code>
</a>
field.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/currentOp/#mongodb-dbcommand-dbcmd.currentOp">
<code class="leafygreen-ui-1l06pbn">
currentOp
</code>
</a>
output, in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/currentOp/#mongodb-data-currentOp.command">
<code class="leafygreen-ui-1l06pbn">
command.comment
</code>
</a>
field.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
A comment can be any valid
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-bson-types">
BSON type
</a>
(string, integer, object, array, etc).
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-let-syntax" target="_self">
<span>
let
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-let-syntax">
</span>
<p class="leafygreen-ui-1kp3ins">
Optional.
</p>
<p class="leafygreen-ui-1kp3ins">
Specifies a document with a list of variables. This allows you to
improve command readability by separating the variables from the query
text.
</p>
<p class="leafygreen-ui-1kp3ins">
The document syntax is:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n <variable_name_1>: <expression_1>,\n ...,\n <variable_name_n>: <expression_n>\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <<!-- -->variable_name_1<!-- -->><!-- -->: <<!-- -->expression_1<!-- -->><!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <<!-- -->variable_name_n<!-- -->><!-- -->: <<!-- -->expression_n<!-- -->></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The variable is set to the value returned by the expression, and cannot
be changed afterwards.
</p>
<p class="leafygreen-ui-1kp3ins">
To access the value of a variable in the command, use the double
dollar sign prefix (
<code class="leafygreen-ui-1l06pbn">
$$
</code>
) together with your variable name in the form
<code class="leafygreen-ui-1l06pbn">
$$<variable_name>
</code>
. For example:
<code class="leafygreen-ui-1l06pbn">
$$targetTotal
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
For a complete example, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-variables-example" target="_self">
<span>
Use Variables in
<code class="leafygreen-ui-1l06pbn">
let
</code>
Option or
<code class="leafygreen-ui-1l06pbn">
c
</code>
Field
<!-- -->
.
</span>
</a>
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-statement-documents">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Update Statements
<a class="headerlink leafygreen-ui-1kepx47" href="#update-statements" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="update-statements">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Each element of the
<code class="leafygreen-ui-1l06pbn">
updates
</code>
array is an update statement document.
Each document contains the following fields:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-q" target="_self">
<span>
q
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-command-q">
</span>
<p class="leafygreen-ui-1kp3ins">
The query that matches documents to update. Use the same
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/#std-label-query-selectors">
query
selectors
</a>
as used in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
find()
</code>
</a>
method.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-u" target="_self">
<span>
u
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document or pipeline
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-command-u">
</span>
<p class="leafygreen-ui-1kp3ins">
The modifications to apply.
The value can be either:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A document that contains
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/#std-label-update-operators">
update operator expressions
<!-- -->
,
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A replacement document with only
<code class="leafygreen-ui-1l06pbn">
<field1>: <value1>
</code>
pairs, or
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
An aggregation pipeline.
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/addFields/#mongodb-pipeline-pipe.-addFields">
<code class="leafygreen-ui-1l06pbn">
$addFields
</code>
</a>
and its alias
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/set/#mongodb-pipeline-pipe.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/project/#mongodb-pipeline-pipe.-project">
<code class="leafygreen-ui-1l06pbn">
$project
</code>
</a>
and its alias
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/unset/#mongodb-pipeline-pipe.-unset">
<code class="leafygreen-ui-1l06pbn">
$unset
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/replaceRoot/#mongodb-pipeline-pipe.-replaceRoot">
<code class="leafygreen-ui-1l06pbn">
$replaceRoot
</code>
</a>
and its alias
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/replaceWith/#mongodb-pipeline-pipe.-replaceWith">
<code class="leafygreen-ui-1l06pbn">
$replaceWith
</code>
.
</a>
</p>
</li>
</ul>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For details, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-behaviors" target="_self">
<span>
Behavior
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-c" target="_self">
<span>
c
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-command-c">
</span>
<p class="leafygreen-ui-1kp3ins">
Optional. You can specify
<code class="leafygreen-ui-1l06pbn">
c
</code>
only if
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-u" target="_self">
<span>
u
</span>
</a>
is a pipeline.
</p>
<p class="leafygreen-ui-1kp3ins">
Specifies a document with a list of variables. This allows you to
improve command readability by separating the variables from the query
text.
</p>
<p class="leafygreen-ui-1kp3ins">
The document syntax is:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n <variable_name_1>: <expression_1>,\n ...,\n <variable_name_n>: <expression_n>\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <<!-- -->variable_name_1<!-- -->><!-- -->: <<!-- -->expression_1<!-- -->><!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <<!-- -->variable_name_n<!-- -->><!-- -->: <<!-- -->expression_n<!-- -->></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The variable is set to the value returned by the expression, and cannot
be changed afterwards.
</p>
<p class="leafygreen-ui-1kp3ins">
To access the value of a variable in the command, use the double
dollar sign prefix (
<code class="leafygreen-ui-1l06pbn">
$$
</code>
) together with your variable name in the form
<code class="leafygreen-ui-1l06pbn">
$$<variable_name>
</code>
. For example:
<code class="leafygreen-ui-1l06pbn">
$$targetTotal
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
To use a variable to filter results, you must access the variable
within the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/expr/#mongodb-query-op.-expr">
<code class="leafygreen-ui-1l06pbn">
$expr
</code>
</a>
operator.
</p>
<p class="leafygreen-ui-1kp3ins">
For a complete example using
<code class="leafygreen-ui-1l06pbn">
let
</code>
and variables, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-variables-example" target="_self">
<span>
Use Variables in
<code class="leafygreen-ui-1l06pbn">
let
</code>
Option or
<code class="leafygreen-ui-1l06pbn">
c
</code>
Field
<!-- -->
.
</span>
</a>
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-upsert" target="_self">
<span>
upsert
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-command-upsert">
</span>
<p class="leafygreen-ui-1kp3ins">
Optional. When
<code class="leafygreen-ui-1l06pbn">
true
</code>
,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
either:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Creates a new document if no documents match the
<code class="leafygreen-ui-1l06pbn">
query
</code>
.
For more details see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.update/#std-label-upsert-behavior">
upsert behavior
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Updates a single document that matches the
<code class="leafygreen-ui-1l06pbn">
query
</code>
.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
If both
<code class="leafygreen-ui-1l06pbn">
upsert
</code>
and
<code class="leafygreen-ui-1l06pbn">
multi
</code>
are true and no documents match the query, the update operation inserts only a single document.
</p>
<p class="leafygreen-ui-1kp3ins">
To avoid multiple
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-upsert">
upserts
</a>
, ensure that the
<code class="leafygreen-ui-1l06pbn">
query
</code>
field(s) are
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-unique/#std-label-index-type-unique">
uniquely indexed
</a>
. See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-behaviors-unique-index" target="_self">
<span>
Upsert with Unique Index
</span>
</a>
for an example.
</p>
<p class="leafygreen-ui-1kp3ins">
Defaults to
<code class="leafygreen-ui-1l06pbn">
false
</code>
, which does
<em>
not
</em>
insert a new document when no
match is found.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
multi
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. If
<code class="leafygreen-ui-1l06pbn">
true
</code>
, updates all documents that meet the query criteria. If
<code class="leafygreen-ui-1l06pbn">
false
</code>
, limit the update to one document that meet the query
criteria. Defaults to
<code class="leafygreen-ui-1l06pbn">
false
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
When updating multiple documents, if a single document fails
to update, further documents are not updated. See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-multi-update-failures" target="_self">
<span>
multi-update failures
</span>
</a>
for more
details on this behavior.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
collation
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional.
</p>
<p class="leafygreen-ui-1kp3ins">
Specifies the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/collation/#std-label-collation">
collation
</a>
to use for the operation.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/collation/#std-label-collation">
Collation
</a>
allows users to specify
language-specific rules for string comparison, such as rules for
lettercase and accent marks.
</p>
<p class="leafygreen-ui-1kp3ins">
The collation option has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"collation: {\n locale: <string>,\n caseLevel: <boolean>,\n caseFirst: <string>,\n strength: <int>,\n numericOrdering: <boolean>,\n alternate: <string>,\n maxVariable: <string>,\n backwards: <boolean>\n}"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">collation: {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> locale: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> caseLevel: <boolean>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> caseFirst: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> strength: <int>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> numericOrdering: <boolean>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> alternate: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> maxVariable: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> backwards: <boolean></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
When specifying collation, the
<code class="leafygreen-ui-1l06pbn">
locale
</code>
field is mandatory; all
other collation fields are optional. For descriptions of the fields,
see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/collation/#std-label-collation-document-fields">
Collation Document
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
If the collation is unspecified but the collection has a
default collation (see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.createCollection/#mongodb-method-db.createCollection">
<code class="leafygreen-ui-1l06pbn">
db.createCollection()
</code>
</a>
), the
operation uses the collation specified for the collection.
</p>
<p class="leafygreen-ui-1kp3ins">
If no collation is specified for the collection or for the
operations, MongoDB uses the simple binary comparison used in prior
versions for string comparisons.
</p>
<p class="leafygreen-ui-1kp3ins">
You cannot specify multiple collations for an operation. For
example, you cannot specify different collations per field, or if
performing a find with a sort, you cannot use one collation for the
find and another for the sort.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
arrayFilters
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. An array of filter documents that determines which array elements to
modify for an update operation on an array field.
</p>
<p class="leafygreen-ui-1kp3ins">
In the update document, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/positional-filtered/#mongodb-update-up.---identifier--">
<code class="leafygreen-ui-1l06pbn">
$[<identifier>]
</code>
</a>
filtered
positional operator to define an identifier, which you then reference
in the array filter documents. You cannot have an array filter
document for an identifier if the identifier is not included in the
update document.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
<identifier>
</code>
must begin with a lowercase letter and
contain only alphanumeric characters.
</p>
<p class="leafygreen-ui-1kp3ins">
You can include the same identifier multiple times in the update
document; however, for each distinct identifier (
<code class="leafygreen-ui-1l06pbn">
$[identifier]
</code>
)
in the update document, you must specify
<strong>
exactly one
</strong>
corresponding array filter document. That is, you cannot specify
multiple array filter documents for the same identifier. For
example, if the update statement includes the identifier
<code class="leafygreen-ui-1l06pbn">
x
</code>
(possibly multiple times), you cannot specify the following for
<code class="leafygreen-ui-1l06pbn">
arrayFilters
</code>
that includes 2 separate filter documents for
<code class="leafygreen-ui-1l06pbn">
x
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"// INVALID\n\n[\n { \"x.a\": { $gt: 85 } },\n { \"x.b\": { $gt: 80 } }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// INVALID</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"x.a"</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">85</span> } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"x.b"</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">80</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
However, you can specify compound conditions on the same identifier
in a single filter document, such as in the following examples:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"// Example 1\n[\n { $or: [{\"x.a\": {$gt: 85}}, {\"x.b\": {$gt: 80}}] }\n]\n// Example 2\n[\n { $and: [{\"x.a\": {$gt: 85}}, {\"x.b\": {$gt: 80}}] }\n]\n// Example 3\n[\n { \"x.a\": { $gt: 85 }, \"x.b\": { $gt: 80 } }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// Example 1</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$or</span>: <!-- -->[<!-- -->{<span class="lg-highlight-string">"x.a"</span>: <!-- -->{<span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">85</span>}}<!-- -->, <!-- -->{<span class="lg-highlight-string">"x.b"</span>: <!-- -->{<span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">80</span>}}] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// Example 2</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$and</span>: <!-- -->[<!-- -->{<span class="lg-highlight-string">"x.a"</span>: <!-- -->{<span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">85</span>}}<!-- -->, <!-- -->{<span class="lg-highlight-string">"x.b"</span>: <!-- -->{<span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">80</span>}}] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// Example 3</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"x.a"</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">85</span> }<!-- -->, <span class="lg-highlight-string">"x.b"</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">80</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For examples, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-arrayFilters" target="_self">
<span>
Specify
<code class="leafygreen-ui-1l06pbn">
arrayFilters
</code>
for Array Update Operations
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-hint" target="_self">
<span>
hint
</span>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Document or string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-command-hint">
</span>
<p class="leafygreen-ui-1kp3ins">
Optional. A document or string that specifies the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/indexes/#std-label-indexes">
index
</a>
to use to support the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-q" target="_self">
<span>
query predicate
<!-- -->
.
</span>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The option can take an index specification document or the index
name string.
</p>
<p class="leafygreen-ui-1kp3ins">
If you specify an index that does not exist, the operation
errors.
</p>
<p class="leafygreen-ui-1kp3ins">
For an example, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-ex-update-command-hint" target="_self">
<span>
Specify
<code class="leafygreen-ui-1l06pbn">
hint
</code>
for Update Operations
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Returns
<a class="headerlink leafygreen-ui-1kepx47" href="#returns" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="returns">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The command returns a document that contains the status of the
operation. For example:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"ok\" : 1,\n \"nModified\" : 0,\n \"n\" : 1,\n \"upserted\" : [\n {\n \"index\" : 0,\n \"_id\" : ObjectId(\"52ccb2118908ccd753d65882\")\n }\n ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"ok"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"nModified"</span> <!-- -->: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"n"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"upserted"</span> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"index"</span> <!-- -->: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"52ccb2118908ccd753d65882"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For details of the output fields, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-output" target="_self">
<span>
Output
<!-- -->
.
</span>
</a>
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Access Control
<a class="headerlink leafygreen-ui-1kepx47" href="#access-control" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="access-control">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
On deployments running with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-security.authorization">
<code class="leafygreen-ui-1l06pbn">
authorization
</code>
</a>
, the
user must have access that includes the following privileges:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-update">
<code class="leafygreen-ui-1l06pbn">
update
</code>
</a>
action on the specified collection(s).
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-find">
<code class="leafygreen-ui-1l06pbn">
find
</code>
</a>
action on the specified collection(s).
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-insert">
<code class="leafygreen-ui-1l06pbn">
insert
</code>
</a>
action on the specified collection(s).
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
The built-in role
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/built-in-roles/#mongodb-authrole-readWrite">
<code class="leafygreen-ui-1l06pbn">
readWrite
</code>
</a>
provides the required
privileges.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-command-behaviors">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-command-behaviors-update-expressions">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Update with an Update Operator Expressions Document
<a class="headerlink leafygreen-ui-1kepx47" href="#update-with-an-update-operator-expressions-document" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="update-with-an-update-operator-expressions-document">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The update statement field
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-u" target="_self">
<span>
u
</span>
</a>
can accept a
document that only contains
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/#std-label-update-operators">
update operator
</a>
expressions. For example:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"updates: [\n {\n q: <query>,\n u: { $set: { status: \"D\" }, $inc: { quantity: 2 } },\n ...\n },\n ...\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">q</span>: <<!-- -->query<!-- -->><!-- -->,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">u</span>: <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"D"</span> }<!-- -->, <span class="lg-highlight-attr">$inc</span>: <!-- -->{ <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">2</span> } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Then, the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
command updates only the corresponding
fields in the document.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-command-behaviors-replacement-document">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Update with a Replacement Document
<a class="headerlink leafygreen-ui-1kepx47" href="#update-with-a-replacement-document" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="update-with-a-replacement-document">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The update statement field
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-u" target="_self">
<span>
u
</span>
</a>
field can accept
a replacement document, i.e. the document contains
<em>
only
</em>
<code class="leafygreen-ui-1l06pbn">
field:value
</code>
expressions. For example:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"updates: [\n {\n q: <query>,\n u: { status: \"D\", quantity: 4 },\n ...\n },\n ...\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">q</span>: <<!-- -->query<!-- -->><!-- -->,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">u</span>: <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"D"</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">4</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Then the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
command
<em>
replaces
</em>
the matching document
with the update document. The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
command can only
replace a
<em>
single
</em>
matching document; i.e. the
<code class="leafygreen-ui-1l06pbn">
multi
</code>
field cannot
be
<code class="leafygreen-ui-1l06pbn">
true
</code>
. The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
command
<em>
does not
</em>
replace the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
value.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-multi-update-failures">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Multi-Update Failures
<a class="headerlink leafygreen-ui-1kepx47" href="#multi-update-failures" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="multi-update-failures">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If a single document fails to update in an update command with the
<code class="leafygreen-ui-1l06pbn">
multi
</code>
parameter set to
<code class="leafygreen-ui-1l06pbn">
true
</code>
, no further documents
update as part of that command.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, create a
<code class="leafygreen-ui-1l06pbn">
members
</code>
collection with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.members.insertMany( [\n { \"_id\" : 1, \"member\" : \"Taylor\", \"status\" : \"pending\", \"points\" : 1},\n { \"_id\" : 2, \"member\" : \"Alexis\", \"status\" : \"enrolled\", \"points\" : 59},\n { \"_id\" : 3, \"member\" : \"Elizabeth\", \"status\" : \"enrolled\", \"points\" : 34}\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">members</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"Taylor"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"pending"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">1</span>}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"Alexis"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"enrolled"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">59</span>}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"Elizabeth"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"enrolled"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">34</span>}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following operation creates a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/schema-validation/#std-label-schema-validation-overview">
document validator
</a>
on the
<code class="leafygreen-ui-1l06pbn">
members
</code>
collection with a rule
that the
<code class="leafygreen-ui-1l06pbn">
points
</code>
value can not equal
<code class="leafygreen-ui-1l06pbn">
60
</code>
.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand( {\n collMod: \"members\",\n validator: { points: { $ne: 60 } }\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">collMod</span>: <span class="lg-highlight-string">"members"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">validator</span>: <!-- -->{ <span class="lg-highlight-attr">points</span>: <!-- -->{ <span class="lg-highlight-attr">$ne</span>: <span class="lg-highlight-number">60</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
This update command increases the
<code class="leafygreen-ui-1l06pbn">
points
</code>
field of every document
by
<code class="leafygreen-ui-1l06pbn">
1
</code>
.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n update: \"members\",\n updates: [\n {\n q: {},\n u: { $inc: { points: 1 } },\n multi: true\n }\n ]\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <span class="lg-highlight-string">"members"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">q</span>: <!-- -->{<!-- -->}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">u</span>: <!-- -->{ <span class="lg-highlight-attr">$inc</span>: <!-- -->{ <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">1</span> } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">multi</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
After running the command, the collection contains the following
documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ _id: 1, member: 'Taylor', status: 'A', points: 2 }\n{ _id: 2, member: 'Alexis', status: 'D', points: 59 }\n{ _id: 3, member: 'Elizabeth', status: 'C', points: 34 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">member</span>: <span class="lg-highlight-string">'Taylor'</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'A'</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">2</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">member</span>: <span class="lg-highlight-string">'Alexis'</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'D'</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">59</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">member</span>: <span class="lg-highlight-string">'Elizabeth'</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">'C'</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">34</span> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The update command updated the
<code class="leafygreen-ui-1l06pbn">
points
</code>
value of the first document
but failed to update the second document because of the validator rule
that the
<code class="leafygreen-ui-1l06pbn">
points
</code>
value can not equal
<code class="leafygreen-ui-1l06pbn">
60
</code>
. The third document did
not update because no further documents update following a write error.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If a subset of matched documents are updated, such as when an update
would cause some documents to fail schema validation, the value of
<code class="leafygreen-ui-1l06pbn">
nModified
</code>
returned by the
<code class="leafygreen-ui-1l06pbn">
update
</code>
command might not be accurate.
</p>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-command-behaviors-aggregation-pipeline">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Update with an Aggregation Pipeline
<a class="headerlink leafygreen-ui-1kepx47" href="#update-with-an-aggregation-pipeline" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="update-with-an-aggregation-pipeline">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The update statement field
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-u" target="_self">
<span>
u
</span>
</a>
field can accept an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/aggregation-pipeline/#std-label-aggregation-pipeline">
aggregation pipeline
</a>
<code class="leafygreen-ui-1l06pbn">
[ <stage1>, <stage2>, ... ]
</code>
that specifies the modifications to perform.
The pipeline can consist of the following stages:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/addFields/#mongodb-pipeline-pipe.-addFields">
<code class="leafygreen-ui-1l06pbn">
$addFields
</code>
</a>
and its alias
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/set/#mongodb-pipeline-pipe.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/project/#mongodb-pipeline-pipe.-project">
<code class="leafygreen-ui-1l06pbn">
$project
</code>
</a>
and its alias
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/unset/#mongodb-pipeline-pipe.-unset">
<code class="leafygreen-ui-1l06pbn">
$unset
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/replaceRoot/#mongodb-pipeline-pipe.-replaceRoot">
<code class="leafygreen-ui-1l06pbn">
$replaceRoot
</code>
</a>
and its alias
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/replaceWith/#mongodb-pipeline-pipe.-replaceWith">
<code class="leafygreen-ui-1l06pbn">
$replaceWith
</code>
.
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Using the aggregation pipeline allows for a more expressive update
statement, such as expressing conditional updates based on current
field values or updating one field using the value of another field(s).
</p>
<p class="leafygreen-ui-1kp3ins">
For example:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"updates: [\n {\n q: <query>,\n u: [\n { $set: { status: \"Modified\", comments: [ \"$misc1\", \"$misc2\" ] } },\n { $unset: [ \"misc1\", \"misc2\" ] }\n ],\n ...\n },\n ...\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">q</span>: <<!-- -->query<!-- -->><!-- -->,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">u</span>: <!-- -->[</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"Modified"</span>, <span class="lg-highlight-attr">comments</span>: <!-- -->[ <span class="lg-highlight-string">"$misc1"</span>, <span class="lg-highlight-string">"$misc2"</span> ] } }<!-- -->,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$unset</span>: <!-- -->[ <span class="lg-highlight-string">"misc1"</span>, <span class="lg-highlight-string">"misc2"</span> ] }</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->...</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
$set
</code>
and
<code class="leafygreen-ui-1l06pbn">
$unset
</code>
used in the pipeline refers to the
aggregation stages
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/set/#mongodb-pipeline-pipe.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/unset/#mongodb-pipeline-pipe.-unset">
<code class="leafygreen-ui-1l06pbn">
$unset
</code>
</a>
respectively, and not the update operators
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/set/#mongodb-update-up.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/unset/#mongodb-update-up.-unset">
<code class="leafygreen-ui-1l06pbn">
$unset
</code>
.
</a>
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For examples, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-example-agg" target="_self">
<span>
Update with Aggregation Pipeline
<!-- -->
.
</span>
</a>
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-command-behaviors-unique-index">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Upsert with Unique Index
<a class="headerlink leafygreen-ui-1kepx47" href="#upsert-with-unique-index" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="upsert-with-unique-index">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Upserts can create duplicate documents, unless there is a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-unique/#std-label-index-type-unique">
unique index
</a>
to prevent duplicates.
</p>
<p class="leafygreen-ui-1kp3ins">
Consider an example where no document with the name
<code class="leafygreen-ui-1l06pbn">
Andy
</code>
exists
and multiple clients issue the following command at roughly the same
time:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n update: \"people\",\n updates: [\n { q: { name: \"Andy\" }, u: { $inc: { score: 1 } }, multi: true, upsert: true }\n ]\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <span class="lg-highlight-string">"people"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">q</span>: <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"Andy"</span> }<!-- -->, <span class="lg-highlight-attr">u</span>: <!-- -->{ <span class="lg-highlight-attr">$inc</span>: <!-- -->{ <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">1</span> } }<!-- -->, <span class="lg-highlight-attr">multi</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">upsert</span>: <span class="lg-highlight-literal">true</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
If all
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
operations finish the query phase before any
client successfully inserts data,
<strong>
and
</strong>
there is no unique index on
the
<code class="leafygreen-ui-1l06pbn">
name
</code>
field, each
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
operation may result in an
insert, creating multiple documents with
<code class="leafygreen-ui-1l06pbn">
name: Andy
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
A unique index on the
<code class="leafygreen-ui-1l06pbn">
name
</code>
field ensures that only one document
is created. With a unique index in place, the multiple
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
operations now exhibit the following behavior:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Exactly one
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
operation will successfully insert a new
document.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Other
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
operations either update the newly-inserted
document or fail due to a unique key collision.
</p>
<p class="leafygreen-ui-1kp3ins">
In order for other
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
operations to update the
newly-inserted document,
<strong>
all
</strong>
of the following conditions must
be met:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The target collection has a unique index that would cause a
duplicate key error.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The update operation is not
<code class="leafygreen-ui-1l06pbn">
updateMany
</code>
or
<code class="leafygreen-ui-1l06pbn">
multi
</code>
is
<code class="leafygreen-ui-1l06pbn">
false
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The update match condition is either:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A single equality predicate. For example
<code class="leafygreen-ui-1l06pbn">
{ "fieldA" : "valueA" }
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A logical AND of equality predicates. For example
<code class="leafygreen-ui-1l06pbn">
{ "fieldA" :
"valueA", "fieldB" : "valueB" }
</code>
</p>
</li>
</ul>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The fields in the equality predicate match the fields in the
unique index key pattern.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The update operation does not modify any fields in the
unique index key pattern.
</p>
</li>
</ul>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
The following table shows examples of
<code class="leafygreen-ui-1l06pbn">
upsert
</code>
operations that,
when a key collision occurs, either result in an update or fail.
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:30%"/>
<col style="width:40%"/>
<col style="width:30%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Unique Index Key Pattern
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Update Operation
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Result
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ name : 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->name <!-- -->: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.people.updateOne(\n { name: \"Andy\" },\n { $inc: { score: 1 } },\n { upsert: true }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">people</span>.<span class="lg-highlight-title lg-highlight-function">updateOne</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"Andy"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$inc</span>: <!-- -->{ <span class="lg-highlight-attr">score</span>: <span class="lg-highlight-number">1</span> } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">upsert</span>: <span class="lg-highlight-literal">true</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The
<code class="leafygreen-ui-1l06pbn">
score
</code>
field of the matched document is incremented by
1.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ name : 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->name <!-- -->: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.people.updateOne(\n { name: { $ne: \"Joe\" } },\n { $set: { name: \"Andy\" } },\n { upsert: true }\n )","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">people</span>.<span class="lg-highlight-title lg-highlight-function">updateOne</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">name</span>: <!-- -->{ <span class="lg-highlight-attr">$ne</span>: <span class="lg-highlight-string">"Joe"</span> } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"Andy"</span> } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">upsert</span>: <span class="lg-highlight-literal">true</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> )</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The operation fails because it modifies the field in the
unique index key pattern (
<code class="leafygreen-ui-1l06pbn">
name
</code>
).
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ name : 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->name <!-- -->: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.people.updateOne(\n { name: \"Andy\", email: \"[email protected]\" },\n { $set: { active: false } },\n { upsert: true }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">people</span>.<span class="lg-highlight-title lg-highlight-function">updateOne</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"Andy"</span>, <span class="lg-highlight-attr">email</span>: <span class="lg-highlight-string">"[email protected]"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">active</span>: <span class="lg-highlight-literal">false</span> } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">upsert</span>: <span class="lg-highlight-literal">true</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The operation fails because the equality predicate fields
(
<code class="leafygreen-ui-1l06pbn">
name
</code>
,
<code class="leafygreen-ui-1l06pbn">
email
</code>
) do not match the index key field
(
<code class="leafygreen-ui-1l06pbn">
name
</code>
).
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Limits
<a class="headerlink leafygreen-ui-1kepx47" href="#limits" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="limits">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
For each update element in the
<code class="leafygreen-ui-1l06pbn">
updates
</code>
array, the sum of the query
and the update sizes (i.e.
<code class="leafygreen-ui-1l06pbn">
q
</code>
and
<code class="leafygreen-ui-1l06pbn">
u
</code>
) must be less than or equal
to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/limits/#mongodb-limit-BSON-Document-Size">
maximum BSON document size
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The total number of update statements in the
<code class="leafygreen-ui-1l06pbn">
updates
</code>
array must be
less than or equal to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/limits/#mongodb-limit-Write-Command-Batch-Limit-Size">
maximum bulk size
<!-- -->
.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Document Validation
<a class="headerlink leafygreen-ui-1kepx47" href="#document-validation" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="document-validation">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
command adds support for the
<code class="leafygreen-ui-1l06pbn">
bypassDocumentValidation
</code>
option, which lets you bypass
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/schema-validation/#std-label-schema-validation-overview">
document validation
</a>
when
inserting or updating documents in a collection with validation
rules.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Sharded Collections
<a class="headerlink leafygreen-ui-1kepx47" href="#sharded-collections" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sharded-collections">
</div>
</a>
</h3>
<span class="leafygreen-ui-1qnjd6d" id="std-label-cmd-update-sharded-upsert">
</span>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
<code class="leafygreen-ui-1l06pbn">
upsert
</code>
on a Sharded Collection
<a class="headerlink leafygreen-ui-1kepx47" href="#upsert-on-a-sharded-collection" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="upsert-on-a-sharded-collection">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
To use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
with
<code class="leafygreen-ui-1l06pbn">
multi: false
</code>
on a sharded
collection,
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If you do not specify
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-upsert" target="_self">
<span>
upsert: true
</span>
</a>
,
the filter
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-q" target="_self">
<span>
q
</span>
</a>
must either include an
equality match on the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field or target a single shard (such as
by including the shard key).
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If you specify
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-upsert" target="_self">
<span>
upsert: true
</span>
</a>
, the
filter
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-q" target="_self">
<span>
q
</span>
</a>
must include an equality match on the
shard key.
</p>
<p class="leafygreen-ui-1kp3ins">
However, documents in a sharded collection can be
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-shard-key/#std-label-shard-key-missing">
missing the shard key fields
</a>
. To target a
document that is missing the shard key, you can use the
<code class="leafygreen-ui-1l06pbn">
null
</code>
equality match
<strong class="css-4dei7l">
in conjunction with
</strong>
another filter condition
(such as on the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field). For example:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ _id: <value>, <shardkeyfield>: null } // _id of the document missing shard key","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">_id</span>: <<!-- -->value<!-- -->><!-- -->,<!-- --> <!-- --><<!-- -->shardkeyfield<!-- -->><!-- -->: <span class="lg-highlight-literal">null</span> } <span class="lg-highlight-comment">// _id of</span><span class="lg-highlight-comment"> the document missing </span><span class="lg-highlight-comment">shard key</span></td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
</ul>
</section>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Replace Document
<a class="headerlink leafygreen-ui-1kepx47" href="#replace-document" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="replace-document">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
When replacing a document,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
attempts to target a shard,
first by using the query filter. If the operation cannot target a single shard
by the query filter, it then attempts to target by the replacement document.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-command-update-shard-key-modification">
</span>
</section>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Shard Key Modification
<a class="headerlink leafygreen-ui-1kepx47" href="#shard-key-modification" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="shard-key-modification">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
You can update a document's shard key value unless the shard key field is the
immutable
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field.
</p>
<p class="leafygreen-ui-1kp3ins">
To modify the
<strong>
existing
</strong>
shard key value with
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
:
</span>
</a>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You
<strong class="css-4dei7l">
must
</strong>
run on a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
. Do
<strong class="css-4dei7l">
not
</strong>
issue the operation directly on the shard.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You
<strong class="css-4dei7l">
must
</strong>
run either in a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/">
transaction
</a>
or as a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/retryable-writes/">
retryable write
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You
<strong class="css-4dei7l">
must
</strong>
specify
<code class="leafygreen-ui-1l06pbn">
multi: false
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You
<strong class="css-4dei7l">
must
</strong>
include an equality
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-q" target="_self">
<span>
query filter
</span>
</a>
on the full shard key.
</p>
</li>
</ul>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Since a missing key value is returned as part of a null equality
match, to avoid updating a null-valued key, include additional
query conditions (such as on the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field) as appropriate.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
See also
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-cmd-update-sharded-upsert" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
upsert
</code>
on a Sharded Collection
<!-- -->
.
</span>
</a>
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-cmd-update-missing-shard-key">
</span>
</section>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Missing Shard Key
<a class="headerlink leafygreen-ui-1kepx47" href="#missing-shard-key" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="missing-shard-key">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Documents in a sharded collection can be
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-shard-key/#std-label-shard-key-missing">
missing the shard key fields
</a>
. To use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
to set the document's
<strong>
missing
</strong>
shard key, you
<strong class="css-4dei7l">
must
</strong>
run on a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
. Do
<strong class="css-4dei7l">
not
</strong>
issue the operation directly on
the shard.
</p>
<p class="leafygreen-ui-1kp3ins">
In addition, the following requirements also apply:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:30%"/>
<col style="width:70%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Task
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Requirements
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
To set to
<code class="leafygreen-ui-1l06pbn">
null
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Can specify
<code class="leafygreen-ui-1l06pbn">
multi: true
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Requires equality filter on the full shard key if
<code class="leafygreen-ui-1l06pbn">
upsert:
true
</code>
is specified.
</p>
</li>
</ul>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
To set to a non-
<code class="leafygreen-ui-1l06pbn">
null
</code>
value:
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<strong class="css-4dei7l">
Must
</strong>
be performed either inside a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/">
transaction
</a>
or as a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/retryable-writes/">
retryable write
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<strong class="css-4dei7l">
Must
</strong>
specify
<code class="leafygreen-ui-1l06pbn">
multi: false
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Requires equality filter on the full shard key if either:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
upsert: true
</code>
, or
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
if using a replacement document and the new shard key
value belongs to a different shard.
</p>
</li>
</ul>
</li>
</ul>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Since a missing key value is returned as part of a null equality
match, to avoid updating a null-valued key, include additional
query conditions (such as on the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field) as appropriate.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
See also:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.update/#std-label-method-update-sharded-upsert">
<code class="leafygreen-ui-1l06pbn">
upsert
</code>
on a Sharded Collection
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-shard-key/#std-label-shard-key-missing">
Missing Shard Key Fields
</a>
</p>
</li>
</ul>
</section>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Transactions
<a class="headerlink leafygreen-ui-1kepx47" href="#transactions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="transactions">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
can be used inside
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions">
distributed transactions
<!-- -->
.
</a>
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
In most cases, a distributed transaction incurs a greater
performance cost over single document writes, and the
availability of distributed transactions should not be a
replacement for effective schema design. For many scenarios, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/data-modeling/concepts/embedding-vs-references/#std-label-data-modeling-embedding">
denormalized data model (embedded documents and arrays)
</a>
will continue to be optimal for your
data and use cases. That is, for many scenarios, modeling your data
appropriately will minimize the need for distributed
transactions.
</p>
<p class="leafygreen-ui-1kp3ins">
For additional transactions usage considerations
(such as runtime limit and oplog size limit), see also
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions-production-consideration/#std-label-production-considerations">
Production Considerations
<!-- -->
.
</a>
</p>
</div>
</div>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Upsert within Transactions
<a class="headerlink leafygreen-ui-1kepx47" href="#upsert-within-transactions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="upsert-within-transactions">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
You can create collections and indexes inside a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions-create-collections-indexes">
distributed
transaction
</a>
if the
transaction is
<strong class="css-4dei7l">
not
</strong>
a cross-shard write transaction.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
with
<code class="leafygreen-ui-1l06pbn">
upsert: true
</code>
can be run on an existing
collection or a non-existing collection. If run on a non-existing
collection, the operation creates the collection.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions-create-collections-indexes">
Create Collections and Indexes in a Transaction
</a>
</p>
</div>
</div>
</section>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Write Concerns and Transactions
<a class="headerlink leafygreen-ui-1kepx47" href="#write-concerns-and-transactions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="write-concerns-and-transactions">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Do not explicitly set the write concern for the operation if run in
a transaction. To use write concern with transactions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions-write-concern">
Transactions and Write Concern
<!-- -->
.
</a>
</p>
</section>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Update Specific Fields of One Document
<a class="headerlink leafygreen-ui-1kepx47" href="#update-specific-fields-of-one-document" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="update-specific-fields-of-one-document">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/#std-label-update-operators">
update operators
</a>
to update only the
specified fields of a document.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, create a
<code class="leafygreen-ui-1l06pbn">
members
</code>
collection with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.members.insertMany([\n { _id: 1, member: \"abc123\", status: \"Pending\", points: 0, misc1: \"note to self: confirm status\", misc2: \"Need to activate\" },\n { _id: 2, member: \"xyz123\", status: \"D\", points: 59, misc1: \"reminder: ping me at 100pts\", misc2: \"Some random comment\" },\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">members</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">member</span>: <span class="lg-highlight-string">"abc123"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"Pending"</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-attr">misc1</span>: <span class="lg-highlight-string">"note to self: confirm status"</span>, <span class="lg-highlight-attr">misc2</span>: <span class="lg-highlight-string">"Need to activate"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">member</span>: <span class="lg-highlight-string">"xyz123"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"D"</span>, <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">59</span>, <span class="lg-highlight-attr">misc1</span>: <span class="lg-highlight-string">"reminder: ping me at 100pts"</span>, <span class="lg-highlight-attr">misc2</span>: <span class="lg-highlight-string">"Some random comment"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following command uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/set/#mongodb-update-up.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/inc/#mongodb-update-up.-inc">
<code class="leafygreen-ui-1l06pbn">
$inc
</code>
</a>
update operators to update the
<code class="leafygreen-ui-1l06pbn">
status
</code>
and the
<code class="leafygreen-ui-1l06pbn">
points
</code>
fields of a
document where the
<code class="leafygreen-ui-1l06pbn">
member
</code>
equals
<code class="leafygreen-ui-1l06pbn">
"abc123"
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n update: \"members\",\n updates: [\n {\n q: { member: \"abc123\" }, u: { $set: { status: \"A\" }, $inc: { points: 1 } }\n }\n ],\n ordered: false,\n writeConcern: { w: \"majority\", wtimeout: 5000 }\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <span class="lg-highlight-string">"members"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">q</span>: <!-- -->{ <span class="lg-highlight-attr">member</span>: <span class="lg-highlight-string">"abc123"</span> }<!-- -->, <span class="lg-highlight-attr">u</span>: <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <span class="lg-highlight-attr">$inc</span>: <!-- -->{ <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">1</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">ordered</span>: <span class="lg-highlight-literal">false</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">writeConcern</span>: <!-- -->{ <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-string">"majority"</span>, <span class="lg-highlight-attr">wtimeout</span>: <span class="lg-highlight-number">5000</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Because
<code class="leafygreen-ui-1l06pbn">
<update>
</code>
document does not specify the optional
<code class="leafygreen-ui-1l06pbn">
multi
</code>
field, the update only modifies one document, even if more than one
document matches the
<code class="leafygreen-ui-1l06pbn">
q
</code>
match condition.
</p>
<p class="leafygreen-ui-1kp3ins">
The returned document shows that the command found and updated a single
document. The command returns:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"n\" : 1, \"nModified\" : 1, \"ok\" : 1, <additional> }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1agdxuk" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"n"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"nModified"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"ok"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-tag lg-highlight-xml"><</span><span class="lg-highlight-name lg-highlight-tag lg-highlight-xml">additional</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">fields</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">if</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">run</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">on</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">a</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">replica</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">set</span><span class="lg-highlight-tag lg-highlight-xml">/</span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">sharded</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">cluster</span><span class="lg-highlight-tag lg-highlight-xml">></span><span class="lg-highlight-xml"> }</span></td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-output" target="_self">
<span>
Output
</span>
</a>
for details.
</p>
<p class="leafygreen-ui-1kp3ins">
After the command, the collection contains the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"member\" : \"abc123\", \"status\" : \"A\", \"points\" : 1, \"misc1\" : \"note to self: confirm status\", \"misc2\" : \"Need to activate\" }\n{ \"_id\" : 2, \"member\" : \"xyz123\", \"status\" : \"D\", \"points\" : 59, \"misc1\" : \"reminder: ping me at 100pts\", \"misc2\" : \"Some random comment\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"abc123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"misc1"</span> <!-- -->: <span class="lg-highlight-string">"note to self: confirm status"</span>, <span class="lg-highlight-string">"misc2"</span> <!-- -->: <span class="lg-highlight-string">"Need to activate"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"xyz123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"D"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">59</span>, <span class="lg-highlight-string">"misc1"</span> <!-- -->: <span class="lg-highlight-string">"reminder: ping me at 100pts"</span>, <span class="lg-highlight-string">"misc2"</span> <!-- -->: <span class="lg-highlight-string">"Some random comment"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Update Specific Fields of Multiple Documents
<a class="headerlink leafygreen-ui-1kepx47" href="#update-specific-fields-of-multiple-documents" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="update-specific-fields-of-multiple-documents">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/#std-label-update-operators">
update operators
</a>
to update only the
specified fields of a document, and include the
<code class="leafygreen-ui-1l06pbn">
multi
</code>
field set to
<code class="leafygreen-ui-1l06pbn">
true
</code>
in the update statement.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, a
<code class="leafygreen-ui-1l06pbn">
members
</code>
collection contains the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"member\" : \"abc123\", \"status\" : \"A\", \"points\" : 1, \"misc1\" : \"note to self: confirm status\", \"misc2\" : \"Need to activate\" }\n{ \"_id\" : 2, \"member\" : \"xyz123\", \"status\" : \"D\", \"points\" : 59, \"misc1\" : \"reminder: ping me at 100pts\", \"misc2\" : \"Some random comment\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"abc123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"misc1"</span> <!-- -->: <span class="lg-highlight-string">"note to self: confirm status"</span>, <span class="lg-highlight-string">"misc2"</span> <!-- -->: <span class="lg-highlight-string">"Need to activate"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"xyz123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"D"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">59</span>, <span class="lg-highlight-string">"misc1"</span> <!-- -->: <span class="lg-highlight-string">"reminder: ping me at 100pts"</span>, <span class="lg-highlight-string">"misc2"</span> <!-- -->: <span class="lg-highlight-string">"Some random comment"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following command uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/set/#mongodb-update-up.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/inc/#mongodb-update-up.-inc">
<code class="leafygreen-ui-1l06pbn">
$inc
</code>
</a>
update operators to modify the
<code class="leafygreen-ui-1l06pbn">
status
</code>
and the
<code class="leafygreen-ui-1l06pbn">
points
</code>
fields
respectively of all documents in the collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n update: \"members\",\n updates: [\n { q: { }, u: { $set: { status: \"A\" }, $inc: { points: 1 } }, multi: true }\n ],\n ordered: false,\n writeConcern: { w: \"majority\", wtimeout: 5000 }\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <span class="lg-highlight-string">"members"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">q</span>: <!-- -->{ <!-- -->}<!-- -->, <span class="lg-highlight-attr">u</span>: <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <span class="lg-highlight-attr">$inc</span>: <!-- -->{ <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">1</span> } }<!-- -->, <span class="lg-highlight-attr">multi</span>: <span class="lg-highlight-literal">true</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">ordered</span>: <span class="lg-highlight-literal">false</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">writeConcern</span>: <!-- -->{ <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-string">"majority"</span>, <span class="lg-highlight-attr">wtimeout</span>: <span class="lg-highlight-number">5000</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The update modifies all documents that match the query specified in the
<code class="leafygreen-ui-1l06pbn">
q
</code>
field, namely the empty query which matches all documents in the
collection.
</p>
<p class="leafygreen-ui-1kp3ins">
The returned document shows that the command found and updated multiple
documents. For a replica set, the command returns:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"n\" : 2, \"nModified\" : 2, \"ok\" : 1, <additional> }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1agdxuk" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"n"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"nModified"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"ok"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-tag lg-highlight-xml"><</span><span class="lg-highlight-name lg-highlight-tag lg-highlight-xml">additional</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">fields</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">if</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">run</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">on</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">a</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">replica</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">set</span><span class="lg-highlight-tag lg-highlight-xml">/</span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">sharded</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">cluster</span><span class="lg-highlight-tag lg-highlight-xml">></span><span class="lg-highlight-xml"> }</span></td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-output" target="_self">
<span>
Output
</span>
</a>
for details.
</p>
<p class="leafygreen-ui-1kp3ins">
After the command, the collection contains the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"member\" : \"abc123\", \"status\" : \"A\", \"points\" : 2, \"misc1\" : \"note to self: confirm status\", \"misc2\" : \"Need to activate\" }\n{ \"_id\" : 2, \"member\" : \"xyz123\", \"status\" : \"A\", \"points\" : 60, \"misc1\" : \"reminder: ping me at 100pts\", \"misc2\" : \"Some random comment\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"abc123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"misc1"</span> <!-- -->: <span class="lg-highlight-string">"note to self: confirm status"</span>, <span class="lg-highlight-string">"misc2"</span> <!-- -->: <span class="lg-highlight-string">"Need to activate"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"xyz123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">60</span>, <span class="lg-highlight-string">"misc1"</span> <!-- -->: <span class="lg-highlight-string">"reminder: ping me at 100pts"</span>, <span class="lg-highlight-string">"misc2"</span> <!-- -->: <span class="lg-highlight-string">"Some random comment"</span> }</td></tr></tbody></table></code></pre>
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-command-example-agg">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Update with Aggregation Pipeline
<a class="headerlink leafygreen-ui-1kepx47" href="#update-with-aggregation-pipeline" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="update-with-aggregation-pipeline">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
command can use an aggregation pipeline for the update.
The pipeline can consist of the following stages:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/addFields/#mongodb-pipeline-pipe.-addFields">
<code class="leafygreen-ui-1l06pbn">
$addFields
</code>
</a>
and its alias
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/set/#mongodb-pipeline-pipe.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/project/#mongodb-pipeline-pipe.-project">
<code class="leafygreen-ui-1l06pbn">
$project
</code>
</a>
and its alias
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/unset/#mongodb-pipeline-pipe.-unset">
<code class="leafygreen-ui-1l06pbn">
$unset
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/replaceRoot/#mongodb-pipeline-pipe.-replaceRoot">
<code class="leafygreen-ui-1l06pbn">
$replaceRoot
</code>
</a>
and its alias
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/replaceWith/#mongodb-pipeline-pipe.-replaceWith">
<code class="leafygreen-ui-1l06pbn">
$replaceWith
</code>
.
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Using the aggregation pipeline allows for a more expressive update
statement, such as expressing conditional updates based on current
field values or updating one field using the value of another field(s).
</p>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Example 1
<a class="headerlink leafygreen-ui-1kepx47" href="#example-1" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example-1">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
The following examples uses the aggregation pipeline to modify a field
using the values of the other fields in the document.
</p>
<p class="leafygreen-ui-1kp3ins">
A
<code class="leafygreen-ui-1l06pbn">
members
</code>
collection contains the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"member\" : \"abc123\", \"status\" : \"A\", \"points\" : 2, \"misc1\" : \"note to self: confirm status\", \"misc2\" : \"Need to activate\" }\n{ \"_id\" : 2, \"member\" : \"xyz123\", \"status\" : \"A\", \"points\" : 60, \"misc1\" : \"reminder: ping me at 100pts\", \"misc2\" : \"Some random comment\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"abc123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"misc1"</span> <!-- -->: <span class="lg-highlight-string">"note to self: confirm status"</span>, <span class="lg-highlight-string">"misc2"</span> <!-- -->: <span class="lg-highlight-string">"Need to activate"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"xyz123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">60</span>, <span class="lg-highlight-string">"misc1"</span> <!-- -->: <span class="lg-highlight-string">"reminder: ping me at 100pts"</span>, <span class="lg-highlight-string">"misc2"</span> <!-- -->: <span class="lg-highlight-string">"Some random comment"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Assume that instead of separate
<code class="leafygreen-ui-1l06pbn">
misc1
</code>
and
<code class="leafygreen-ui-1l06pbn">
misc2
</code>
fields, you
want to gather these into a new
<code class="leafygreen-ui-1l06pbn">
comments
</code>
field. The following
update operation uses an aggregation pipeline to add the new
<code class="leafygreen-ui-1l06pbn">
comments
</code>
field and remove the
<code class="leafygreen-ui-1l06pbn">
misc1
</code>
and
<code class="leafygreen-ui-1l06pbn">
misc2
</code>
fields for
all documents in the collection.
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
First, set the
<code class="leafygreen-ui-1l06pbn">
status
</code>
field to
<code class="leafygreen-ui-1l06pbn">
"Modified"
</code>
and add a new
field
<code class="leafygreen-ui-1l06pbn">
comments
</code>
that contains the current contents of two other
fields
<code class="leafygreen-ui-1l06pbn">
misc1
</code>
and
<code class="leafygreen-ui-1l06pbn">
misc2
</code>
fields.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Second, remove the
<code class="leafygreen-ui-1l06pbn">
misc1
</code>
and
<code class="leafygreen-ui-1l06pbn">
misc2
</code>
fields.
</p>
</li>
</ul>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n update: \"members\",\n updates: [\n {\n q: { },\n u: [\n { $set: { status: \"Modified\", comments: [ \"$misc1\", \"$misc2\" ] } },\n { $unset: [ \"misc1\", \"misc2\" ] }\n ],\n multi: true\n }\n ],\n ordered: false,\n writeConcern: { w: \"majority\", wtimeout: 5000 }\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <span class="lg-highlight-string">"members"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">q</span>: <!-- -->{ <!-- -->}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">u</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"Modified"</span>, <span class="lg-highlight-attr">comments</span>: <!-- -->[ <span class="lg-highlight-string">"$misc1"</span>, <span class="lg-highlight-string">"$misc2"</span> ] } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$unset</span>: <!-- -->[ <span class="lg-highlight-string">"misc1"</span>, <span class="lg-highlight-string">"misc2"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">multi</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">ordered</span>: <span class="lg-highlight-literal">false</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">writeConcern</span>: <!-- -->{ <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-string">"majority"</span>, <span class="lg-highlight-attr">wtimeout</span>: <span class="lg-highlight-number">5000</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
$set
</code>
and
<code class="leafygreen-ui-1l06pbn">
$unset
</code>
used in the pipeline refers to the
aggregation stages
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/set/#mongodb-pipeline-pipe.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/unset/#mongodb-pipeline-pipe.-unset">
<code class="leafygreen-ui-1l06pbn">
$unset
</code>
</a>
respectively, and not the update operators
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/set/#mongodb-update-up.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/unset/#mongodb-update-up.-unset">
<code class="leafygreen-ui-1l06pbn">
$unset
</code>
.
</a>
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The returned document shows that the command found and updated multiple
documents. The command returns:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"n\" : 2, \"nModified\" : 2, \"ok\" : 1, <additional> }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1agdxuk" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"n"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"nModified"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"ok"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-tag lg-highlight-xml"><</span><span class="lg-highlight-name lg-highlight-tag lg-highlight-xml">additional</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">fields</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">if</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">run</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">on</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">a</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">replica</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">set</span><span class="lg-highlight-tag lg-highlight-xml">/</span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">sharded</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">cluster</span><span class="lg-highlight-tag lg-highlight-xml">></span><span class="lg-highlight-xml"> }</span></td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-output" target="_self">
<span>
Output
</span>
</a>
for details.
</p>
<p class="leafygreen-ui-1kp3ins">
After the command, the collection contains the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"member\" : \"abc123\", \"status\" : \"Modified\", \"points\" : 2, \"comments\" : [ \"note to self: confirm status\", \"Need to activate\" ] }\n{ \"_id\" : 2, \"member\" : \"xyz123\", \"status\" : \"Modified\", \"points\" : 60, \"comments\" : [ \"reminder: ping me at 100pts\", \"Some random comment\" ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"abc123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"Modified"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"comments"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"note to self: confirm status"</span>, <span class="lg-highlight-string">"Need to activate"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"xyz123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"Modified"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">60</span>, <span class="lg-highlight-string">"comments"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"reminder: ping me at 100pts"</span>, <span class="lg-highlight-string">"Some random comment"</span> ] }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Example 2
<a class="headerlink leafygreen-ui-1kepx47" href="#example-2" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example-2">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
The aggregation pipeline allows the update to perform conditional
updates based on the current field values as well as use current field
values to calculate a separate field value.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.students.insertMany( [\n { \"_id\" : 1, \"tests\" : [ 95, 92, 90 ] },\n { \"_id\" : 2, \"tests\" : [ 94, 88, 90 ] },\n { \"_id\" : 3, \"tests\" : [ 70, 75, 82 ] }\n] );","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">students</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"tests"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">95</span>, <span class="lg-highlight-number">92</span>, <span class="lg-highlight-number">90</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"tests"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">94</span>, <span class="lg-highlight-number">88</span>, <span class="lg-highlight-number">90</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"tests"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">70</span>, <span class="lg-highlight-number">75</span>, <span class="lg-highlight-number">82</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )<!-- -->;</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Using an aggregation pipeline, you can update the documents with the
calculated grade average and letter grade.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n update: \"students\",\n updates: [\n {\n q: { },\n u: [\n { $set: { average : { $avg: \"$tests\" } } },\n { $set: { grade: { $switch: {\n branches: [\n { case: { $gte: [ \"$average\", 90 ] }, then: \"A\" },\n { case: { $gte: [ \"$average\", 80 ] }, then: \"B\" },\n { case: { $gte: [ \"$average\", 70 ] }, then: \"C\" },\n { case: { $gte: [ \"$average\", 60 ] }, then: \"D\" }\n ],\n default: \"F\"\n } } } }\n ],\n multi: true\n }\n ],\n ordered: false,\n writeConcern: { w: \"majority\", wtimeout: 5000 }\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <span class="lg-highlight-string">"students"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">q</span>: <!-- -->{ <!-- -->}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">u</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <!-- -->average <!-- -->: <!-- -->{ <span class="lg-highlight-attr">$avg</span>: <span class="lg-highlight-string">"$tests"</span> } } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">grade</span>: <!-- -->{ <span class="lg-highlight-attr">$switch</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">branches</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">case</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <!-- -->[ <span class="lg-highlight-string">"$average"</span>, <span class="lg-highlight-number">90</span> ] }<!-- -->, <span class="lg-highlight-attr">then</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">case</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <!-- -->[ <span class="lg-highlight-string">"$average"</span>, <span class="lg-highlight-number">80</span> ] }<!-- -->, <span class="lg-highlight-attr">then</span>: <span class="lg-highlight-string">"B"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">case</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <!-- -->[ <span class="lg-highlight-string">"$average"</span>, <span class="lg-highlight-number">70</span> ] }<!-- -->, <span class="lg-highlight-attr">then</span>: <span class="lg-highlight-string">"C"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">case</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <!-- -->[ <span class="lg-highlight-string">"$average"</span>, <span class="lg-highlight-number">60</span> ] }<!-- -->, <span class="lg-highlight-attr">then</span>: <span class="lg-highlight-string">"D"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">default</span>: <span class="lg-highlight-string">"F"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> } } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">multi</span>: <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">ordered</span>: <span class="lg-highlight-literal">false</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">writeConcern</span>: <!-- -->{ <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-string">"majority"</span>, <span class="lg-highlight-attr">wtimeout</span>: <span class="lg-highlight-number">5000</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
$set
</code>
used in the pipeline refers to the aggregation stage
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/set/#mongodb-pipeline-pipe.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
, and not the update operators
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/set/#mongodb-update-up.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
.
</a>
</p>
</div>
</div>
<dl>
<dt>
First Stage
</dt>
<dd class="css-1ufxuu7">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/set/#mongodb-pipeline-pipe.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
stage calculates a new field
<code class="leafygreen-ui-1l06pbn">
average
</code>
based
on the average of the
<code class="leafygreen-ui-1l06pbn">
tests
</code>
field. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/avg/#mongodb-group-grp.-avg">
<code class="leafygreen-ui-1l06pbn">
$avg
</code>
</a>
for
more information on the
<code class="leafygreen-ui-1l06pbn">
$avg
</code>
aggregation operator.
</dd>
<dt>
Second Stage
</dt>
<dd class="css-1ufxuu7">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/set/#mongodb-pipeline-pipe.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
stage calculates a new field
<code class="leafygreen-ui-1l06pbn">
grade
</code>
based on
the
<code class="leafygreen-ui-1l06pbn">
average
</code>
field calculated in the previous stage. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/switch/#mongodb-expression-exp.-switch">
<code class="leafygreen-ui-1l06pbn">
$switch
</code>
</a>
for more information on the
<code class="leafygreen-ui-1l06pbn">
$switch
</code>
aggregation operator.
</dd>
</dl>
<p class="leafygreen-ui-1kp3ins">
The returned document shows that the command found and updated multiple
documents. The command returns:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"n\" : 3, \"nModified\" : 3, \"ok\" : 1, <additional> }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1agdxuk" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"n"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"nModified"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"ok"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-tag lg-highlight-xml"><</span><span class="lg-highlight-name lg-highlight-tag lg-highlight-xml">additional</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">fields</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">if</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">run</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">on</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">a</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">replica</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">set</span><span class="lg-highlight-tag lg-highlight-xml">/</span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">sharded</span><span class="lg-highlight-tag lg-highlight-xml"> </span><span class="lg-highlight-attr lg-highlight-tag lg-highlight-xml">cluster</span><span class="lg-highlight-tag lg-highlight-xml">></span><span class="lg-highlight-xml"> }</span></td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
After the command, the collection contains the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"tests\" : [ 95, 92, 90 ], \"average\" : 92.33333333333333, \"grade\" : \"A\" }\n{ \"_id\" : 2, \"tests\" : [ 94, 88, 90 ], \"average\" : 90.66666666666667, \"grade\" : \"A\" }\n{ \"_id\" : 3, \"tests\" : [ 70, 75, 82 ], \"average\" : 75.66666666666667, \"grade\" : \"C\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"tests"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">95</span>, <span class="lg-highlight-number">92</span>, <span class="lg-highlight-number">90</span> ]<!-- -->, <span class="lg-highlight-string">"average"</span> <!-- -->: <span class="lg-highlight-number">92.33333333333333</span>, <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-string">"A"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"tests"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">94</span>, <span class="lg-highlight-number">88</span>, <span class="lg-highlight-number">90</span> ]<!-- -->, <span class="lg-highlight-string">"average"</span> <!-- -->: <span class="lg-highlight-number">90.66666666666667</span>, <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-string">"A"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"tests"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">70</span>, <span class="lg-highlight-number">75</span>, <span class="lg-highlight-number">82</span> ]<!-- -->, <span class="lg-highlight-string">"average"</span> <!-- -->: <span class="lg-highlight-number">75.66666666666667</span>, <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-string">"C"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Bulk Update
<a class="headerlink leafygreen-ui-1kepx47" href="#bulk-update" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="bulk-update">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following example performs multiple update operations on the
<code class="leafygreen-ui-1l06pbn">
members
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n update: \"members\",\n updates: [\n { q: { status: \"P\" }, u: { $set: { status: \"D\" } }, multi: true },\n { q: { _id: 5 }, u: { _id: 5, name: \"abc123\", status: \"A\" }, upsert: true }\n ],\n ordered: false,\n writeConcern: { w: \"majority\", wtimeout: 5000 }\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <span class="lg-highlight-string">"members"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">q</span>: <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"P"</span> }<!-- -->, <span class="lg-highlight-attr">u</span>: <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"D"</span> } }<!-- -->, <span class="lg-highlight-attr">multi</span>: <span class="lg-highlight-literal">true</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">q</span>: <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">5</span> }<!-- -->, <span class="lg-highlight-attr">u</span>: <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">"abc123"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }<!-- -->, <span class="lg-highlight-attr">upsert</span>: <span class="lg-highlight-literal">true</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">ordered</span>: <span class="lg-highlight-literal">false</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">writeConcern</span>: <!-- -->{ <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-string">"majority"</span>, <span class="lg-highlight-attr">wtimeout</span>: <span class="lg-highlight-number">5000</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The returned document shows that the command modified
<code class="leafygreen-ui-1l06pbn">
10
</code>
documents
and inserted a document with the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
value
<code class="leafygreen-ui-1l06pbn">
5
</code>
. See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-output" target="_self">
<span>
Output
</span>
</a>
for details.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"ok\" : 1,\n \"nModified\" : 10,\n \"n\" : 11,\n \"upserted\" : [\n {\n \"index\" : 1,\n \"_id\" : 5\n }\n ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"ok"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"nModified"</span> <!-- -->: <span class="lg-highlight-number">10</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"n"</span> <!-- -->: <span class="lg-highlight-number">11</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"upserted"</span> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"index"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Specify Collation
<a class="headerlink leafygreen-ui-1kepx47" href="#specify-collation" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="specify-collation">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/collation/#std-label-collation">
Collation
</a>
allows users to specify
language-specific rules for string comparison, such as rules for
lettercase and accent marks.
</p>
<p class="leafygreen-ui-1kp3ins">
A collection
<code class="leafygreen-ui-1l06pbn">
myColl
</code>
has the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ _id: 1, category: \"café\", status: \"A\" }\n{ _id: 2, category: \"cafe\", status: \"a\" }\n{ _id: 3, category: \"cafE\", status: \"a\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">category</span>: <span class="lg-highlight-string">"café"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"A"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">category</span>: <span class="lg-highlight-string">"cafe"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"a"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">category</span>: <span class="lg-highlight-string">"cafE"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"a"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following operation includes the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/collation/#std-label-collation">
collation
</a>
option:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand({\n update: \"myColl\",\n updates: [\n { q: { category: \"cafe\", status: \"a\" }, u: { $set: { status: \"Updated\" } }, collation: { locale: \"fr\", strength: 1 } }\n ]\n})","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <span class="lg-highlight-string">"myColl"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">q</span>: <!-- -->{ <span class="lg-highlight-attr">category</span>: <span class="lg-highlight-string">"cafe"</span>, <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"a"</span> }<!-- -->, <span class="lg-highlight-attr">u</span>: <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"Updated"</span> } }<!-- -->, <span class="lg-highlight-attr">collation</span>: <!-- -->{ <span class="lg-highlight-attr">locale</span>: <span class="lg-highlight-string">"fr"</span>, <span class="lg-highlight-attr">strength</span>: <span class="lg-highlight-number">1</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">})</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-command-arrayFilters">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Specify
<code class="leafygreen-ui-1l06pbn">
arrayFilters
</code>
for Array Update Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#specify-arrayfilters-for-array-update-operations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="specify-arrayfilters-for-array-update-operations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
When updating an array field, you can specify
<code class="leafygreen-ui-1l06pbn">
arrayFilters
</code>
that
determine which array elements to update.
</p>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Update Elements Match
<code class="leafygreen-ui-1l06pbn">
arrayFilters
</code>
Criteria
<a class="headerlink leafygreen-ui-1kepx47" href="#update-elements-match-arrayfilters-criteria" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="update-elements-match-arrayfilters-criteria">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Create a collection
<code class="leafygreen-ui-1l06pbn">
students
</code>
with the following
documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.students.insertMany( [\n { \"_id\" : 1, \"grades\" : [ 95, 92, 90 ] },\n { \"_id\" : 2, \"grades\" : [ 98, 100, 102 ] },\n { \"_id\" : 3, \"grades\" : [ 95, 110, 100 ] }\n] );","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">students</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"grades"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">95</span>, <span class="lg-highlight-number">92</span>, <span class="lg-highlight-number">90</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"grades"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">98</span>, <span class="lg-highlight-number">100</span>, <span class="lg-highlight-number">102</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"grades"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">95</span>, <span class="lg-highlight-number">110</span>, <span class="lg-highlight-number">100</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )<!-- -->;</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To modify all elements that are greater than or equal to
<code class="leafygreen-ui-1l06pbn">
100
</code>
in the
<code class="leafygreen-ui-1l06pbn">
grades
</code>
array, use the filtered positional operator
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/positional-filtered/#mongodb-update-up.---identifier--">
<code class="leafygreen-ui-1l06pbn">
$[<identifier>]
</code>
</a>
with the
<code class="leafygreen-ui-1l06pbn">
arrayFilters
</code>
option:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand( {\n update: \"students\",\n updates: [\n { q: { grades: { $gte: 100 } }, u: { $set: { \"grades.$[element]\" : 100 } }, arrayFilters: [ { \"element\": { $gte: 100 } } ], multi: true}\n ]\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <span class="lg-highlight-string">"students"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">q</span>: <!-- -->{ <span class="lg-highlight-attr">grades</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <span class="lg-highlight-number">100</span> } }<!-- -->, <span class="lg-highlight-attr">u</span>: <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-string">"grades.$[element]"</span> <!-- -->: <span class="lg-highlight-number">100</span> } }<!-- -->, <span class="lg-highlight-attr">arrayFilters</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"element"</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <span class="lg-highlight-number">100</span> } } ]<!-- -->, <span class="lg-highlight-attr">multi</span>: <span class="lg-highlight-literal">true</span>}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
After the operation, the collection contains the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"grades\" : [ 95, 92, 90 ] }\n{ \"_id\" : 2, \"grades\" : [ 98, 100, 100 ] }\n{ \"_id\" : 3, \"grades\" : [ 95, 100, 100 ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"grades"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">95</span>, <span class="lg-highlight-number">92</span>, <span class="lg-highlight-number">90</span> ] }</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"grades"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">98</span>, <span class="lg-highlight-number">100</span>, <span class="lg-highlight-number">100</span> ] }</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"grades"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-number">95</span>, <span class="lg-highlight-number">100</span>, <span class="lg-highlight-number">100</span> ] }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Update Specific Elements of an Array of Documents
<a class="headerlink leafygreen-ui-1kepx47" href="#update-specific-elements-of-an-array-of-documents" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="update-specific-elements-of-an-array-of-documents">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
Create a collection
<code class="leafygreen-ui-1l06pbn">
students2
</code>
with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.students2.insertMany( [\n {\n \"_id\" : 1,\n \"grades\" : [\n { \"grade\" : 80, \"mean\" : 75, \"std\" : 6 },\n { \"grade\" : 85, \"mean\" : 90, \"std\" : 4 },\n { \"grade\" : 85, \"mean\" : 85, \"std\" : 6 }\n ]\n },\n {\n \"_id\" : 2,\n \"grades\" : [\n { \"grade\" : 90, \"mean\" : 75, \"std\" : 6 },\n { \"grade\" : 87, \"mean\" : 90, \"std\" : 3 },\n { \"grade\" : 85, \"mean\" : 85, \"std\" : 4 }\n ]\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">students2</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"grades"</span> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-number">80</span>, <span class="lg-highlight-string">"mean"</span> <!-- -->: <span class="lg-highlight-number">75</span>, <span class="lg-highlight-string">"std"</span> <!-- -->: <span class="lg-highlight-number">6</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-number">85</span>, <span class="lg-highlight-string">"mean"</span> <!-- -->: <span class="lg-highlight-number">90</span>, <span class="lg-highlight-string">"std"</span> <!-- -->: <span class="lg-highlight-number">4</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-number">85</span>, <span class="lg-highlight-string">"mean"</span> <!-- -->: <span class="lg-highlight-number">85</span>, <span class="lg-highlight-string">"std"</span> <!-- -->: <span class="lg-highlight-number">6</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"grades"</span> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-number">90</span>, <span class="lg-highlight-string">"mean"</span> <!-- -->: <span class="lg-highlight-number">75</span>, <span class="lg-highlight-string">"std"</span> <!-- -->: <span class="lg-highlight-number">6</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-number">87</span>, <span class="lg-highlight-string">"mean"</span> <!-- -->: <span class="lg-highlight-number">90</span>, <span class="lg-highlight-string">"std"</span> <!-- -->: <span class="lg-highlight-number">3</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-number">85</span>, <span class="lg-highlight-string">"mean"</span> <!-- -->: <span class="lg-highlight-number">85</span>, <span class="lg-highlight-string">"std"</span> <!-- -->: <span class="lg-highlight-number">4</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To modify the value of the
<code class="leafygreen-ui-1l06pbn">
mean
</code>
field for all elements in the
<code class="leafygreen-ui-1l06pbn">
grades
</code>
array where the grade is greater than or equal to
<code class="leafygreen-ui-1l06pbn">
85
</code>
,
use the filtered positional operator
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/positional-filtered/#mongodb-update-up.---identifier--">
<code class="leafygreen-ui-1l06pbn">
$[<identifier>]
</code>
</a>
with
the
<code class="leafygreen-ui-1l06pbn">
arrayFilters
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand({\n update: \"students2\",\n updates: [\n { q: { }, u: { $set: { \"grades.$[elem].mean\" : 100 } }, arrayFilters: [ { \"elem.grade\": { $gte: 85 } } ], multi: true }\n ]\n})","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <span class="lg-highlight-string">"students2"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">q</span>: <!-- -->{ <!-- -->}<!-- -->, <span class="lg-highlight-attr">u</span>: <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-string">"grades.$[elem].mean"</span> <!-- -->: <span class="lg-highlight-number">100</span> } }<!-- -->, <span class="lg-highlight-attr">arrayFilters</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"elem.grade"</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <span class="lg-highlight-number">85</span> } } ]<!-- -->, <span class="lg-highlight-attr">multi</span>: <span class="lg-highlight-literal">true</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">})</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
After the operation, the collection has the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : 1,\n \"grades\" : [\n { \"grade\" : 80, \"mean\" : 75, \"std\" : 6 },\n { \"grade\" : 85, \"mean\" : 100, \"std\" : 4 },\n { \"grade\" : 85, \"mean\" : 100, \"std\" : 6 }\n ]\n}\n{\n \"_id\" : 2,\n \"grades\" : [\n { \"grade\" : 90, \"mean\" : 100, \"std\" : 6 },\n { \"grade\" : 87, \"mean\" : 100, \"std\" : 3 },\n { \"grade\" : 85, \"mean\" : 100, \"std\" : 4 }\n ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"grades"</span> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-number">80</span>, <span class="lg-highlight-string">"mean"</span> <!-- -->: <span class="lg-highlight-number">75</span>, <span class="lg-highlight-string">"std"</span> <!-- -->: <span class="lg-highlight-number">6</span> }<!-- -->,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-number">85</span>, <span class="lg-highlight-string">"mean"</span> <!-- -->: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-string">"std"</span> <!-- -->: <span class="lg-highlight-number">4</span> }<!-- -->,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-number">85</span>, <span class="lg-highlight-string">"mean"</span> <!-- -->: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-string">"std"</span> <!-- -->: <span class="lg-highlight-number">6</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"grades"</span> <!-- -->: <!-- -->[</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-number">90</span>, <span class="lg-highlight-string">"mean"</span> <!-- -->: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-string">"std"</span> <!-- -->: <span class="lg-highlight-number">6</span> }<!-- -->,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-number">87</span>, <span class="lg-highlight-string">"mean"</span> <!-- -->: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-string">"std"</span> <!-- -->: <span class="lg-highlight-number">3</span> }<!-- -->,</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"grade"</span> <!-- -->: <span class="lg-highlight-number">85</span>, <span class="lg-highlight-string">"mean"</span> <!-- -->: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-string">"std"</span> <!-- -->: <span class="lg-highlight-number">4</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-ex-update-command-hint">
</span>
</section>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Specify
<code class="leafygreen-ui-1l06pbn">
hint
</code>
for Update Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#specify-hint-for-update-operations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="specify-hint-for-update-operations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Create a sample
<code class="leafygreen-ui-1l06pbn">
members
</code>
collection with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.members.insertMany([\n { \"_id\" : 1, \"member\" : \"abc123\", \"status\" : \"P\", \"points\" : 0, \"misc1\" : null, \"misc2\" : null },\n { \"_id\" : 2, \"member\" : \"xyz123\", \"status\" : \"A\", \"points\" : 60, \"misc1\" : \"reminder: ping me at 100pts\", \"misc2\" : \"Some random comment\" },\n { \"_id\" : 3, \"member\" : \"lmn123\", \"status\" : \"P\", \"points\" : 0, \"misc1\" : null, \"misc2\" : null },\n { \"_id\" : 4, \"member\" : \"pqr123\", \"status\" : \"D\", \"points\" : 20, \"misc1\" : \"Deactivated\", \"misc2\" : null },\n { \"_id\" : 5, \"member\" : \"ijk123\", \"status\" : \"P\", \"points\" : 0, \"misc1\" : null, \"misc2\" : null },\n { \"_id\" : 6, \"member\" : \"cde123\", \"status\" : \"A\", \"points\" : 86, \"misc1\" : \"reminder: ping me at 100pts\", \"misc2\" : \"Some random comment\" }\n])","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">members</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>(<!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"abc123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"P"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"misc1"</span> <!-- -->: <span class="lg-highlight-literal">null</span>, <span class="lg-highlight-string">"misc2"</span> <!-- -->: <span class="lg-highlight-literal">null</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"xyz123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">60</span>, <span class="lg-highlight-string">"misc1"</span> <!-- -->: <span class="lg-highlight-string">"reminder: ping me at 100pts"</span>, <span class="lg-highlight-string">"misc2"</span> <!-- -->: <span class="lg-highlight-string">"Some random comment"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"lmn123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"P"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"misc1"</span> <!-- -->: <span class="lg-highlight-literal">null</span>, <span class="lg-highlight-string">"misc2"</span> <!-- -->: <span class="lg-highlight-literal">null</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"pqr123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"D"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">20</span>, <span class="lg-highlight-string">"misc1"</span> <!-- -->: <span class="lg-highlight-string">"Deactivated"</span>, <span class="lg-highlight-string">"misc2"</span> <!-- -->: <span class="lg-highlight-literal">null</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"ijk123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"P"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"misc1"</span> <!-- -->: <span class="lg-highlight-literal">null</span>, <span class="lg-highlight-string">"misc2"</span> <!-- -->: <span class="lg-highlight-literal">null</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"member"</span> <!-- -->: <span class="lg-highlight-string">"cde123"</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"A"</span>, <span class="lg-highlight-string">"points"</span> <!-- -->: <span class="lg-highlight-number">86</span>, <span class="lg-highlight-string">"misc1"</span> <!-- -->: <span class="lg-highlight-string">"reminder: ping me at 100pts"</span>, <span class="lg-highlight-string">"misc2"</span> <!-- -->: <span class="lg-highlight-string">"Some random comment"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">])</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Create the following indexes on the collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.members.createIndex( { status: 1 } )\ndb.members.createIndex( { points: 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">members</span>.<span class="lg-highlight-title lg-highlight-function">createIndex</span>( <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span> } )</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">members</span>.<span class="lg-highlight-title lg-highlight-function">createIndex</span>( <!-- -->{ <span class="lg-highlight-attr">points</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following update operation explicitly hints to use the index
<code class="leafygreen-ui-1l06pbn">
{
status: 1 }
</code>
:
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If you specify an index that does not exist, the operation errors.
</p>
</div>
</div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand({\n update: \"members\",\n updates: [\n { q: { \"points\": { $lte: 20 }, \"status\": \"P\" }, u: { $set: { \"misc1\": \"Need to activate\" } }, hint: { status: 1 }, multi: true }\n ]\n})","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(<!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <span class="lg-highlight-string">"members"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">q</span>: <!-- -->{ <span class="lg-highlight-string">"points"</span>: <!-- -->{ <span class="lg-highlight-attr">$lte</span>: <span class="lg-highlight-number">20</span> }<!-- -->, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"P"</span> }<!-- -->, <span class="lg-highlight-attr">u</span>: <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-string">"misc1"</span>: <span class="lg-highlight-string">"Need to activate"</span> } }<!-- -->, <span class="lg-highlight-attr">hint</span>: <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span> }<!-- -->, <span class="lg-highlight-attr">multi</span>: <span class="lg-highlight-literal">true</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">})</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The update command returns the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"n\" : 3, \"nModified\" : 3, \"ok\" : 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"n"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"nModified"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"ok"</span> <!-- -->: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To see the index used, run
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/explain/#mongodb-dbcommand-dbcmd.explain">
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</a>
on the operation:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n explain: {\n update: \"members\",\n updates: [\n { q: { \"points\": { $lte: 20 }, \"status\": \"P\" }, u: { $set: { \"misc1\": \"Need to activate\" } }, hint: { status: 1 }, multi: true }\n ]\n },\n verbosity: \"queryPlanner\"\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">explain</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <span class="lg-highlight-string">"members"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">q</span>: <!-- -->{ <span class="lg-highlight-string">"points"</span>: <!-- -->{ <span class="lg-highlight-attr">$lte</span>: <span class="lg-highlight-number">20</span> }<!-- -->, <span class="lg-highlight-string">"status"</span>: <span class="lg-highlight-string">"P"</span> }<!-- -->, <span class="lg-highlight-attr">u</span>: <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-string">"misc1"</span>: <span class="lg-highlight-string">"Need to activate"</span> } }<!-- -->, <span class="lg-highlight-attr">hint</span>: <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-number">1</span> }<!-- -->, <span class="lg-highlight-attr">multi</span>: <span class="lg-highlight-literal">true</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">verbosity</span>: <span class="lg-highlight-string">"queryPlanner"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/explain/#mongodb-dbcommand-dbcmd.explain">
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</a>
does not modify the documents.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-variables-example">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Use Variables in
<code class="leafygreen-ui-1l06pbn">
let
</code>
Option or
<code class="leafygreen-ui-1l06pbn">
c
</code>
Field
<a class="headerlink leafygreen-ui-1kepx47" href="#use-variables-in-let-option-or-c-field" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="use-variables-in-let-option-or-c-field">
</div>
</a>
</h3>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
Variables can be defined in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-let-syntax" target="_self">
<span>
let
</span>
</a>
option or
the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-update-command-c" target="_self">
<span>
c
</span>
</a>
field and accessed in the
<code class="leafygreen-ui-1l06pbn">
updates
</code>
array.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
To filter results using a variable, you must access the variable
within the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/expr/#mongodb-query-op.-expr">
<code class="leafygreen-ui-1l06pbn">
$expr
</code>
</a>
operator.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Create a collection
<code class="leafygreen-ui-1l06pbn">
cakeFlavors
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.cakeFlavors.insertMany( [\n { _id: 1, flavor: \"chocolate\" },\n { _id: 2, flavor: \"strawberry\" },\n { _id: 3, flavor: \"cherry\" }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">cakeFlavors</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">flavor</span>: <span class="lg-highlight-string">"chocolate"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">flavor</span>: <span class="lg-highlight-string">"strawberry"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">flavor</span>: <span class="lg-highlight-string">"cherry"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following example defines
<code class="leafygreen-ui-1l06pbn">
targetFlavor
</code>
and
<code class="leafygreen-ui-1l06pbn">
newFlavor
</code>
variables in
<code class="leafygreen-ui-1l06pbn">
let
</code>
and uses the variables to change the cake flavor
from cherry to orange:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand( {\n update: db.cakeFlavors.getName(),\n updates: [\n { q: { $expr: { $eq: [ \"$flavor\", \"$$targetFlavor\" ] } },\n u: [ { $set: { flavor: \"$$newFlavor\" } } ] }\n ],\n let : { targetFlavor: \"cherry\", newFlavor: \"orange\" }\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <!-- -->db.<span class="lg-highlight-property">cakeFlavors</span>.<span class="lg-highlight-title lg-highlight-function">getName</span>(<!-- -->)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">q</span>: <!-- -->{ <span class="lg-highlight-attr">$expr</span>: <!-- -->{ <span class="lg-highlight-attr">$eq</span>: <!-- -->[ <span class="lg-highlight-string">"$flavor"</span>, <span class="lg-highlight-string">"$$targetFlavor"</span> ] } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">u</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">flavor</span>: <span class="lg-highlight-string">"$$newFlavor"</span> } } ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">let</span> <!-- -->: <!-- -->{ <span class="lg-highlight-attr">targetFlavor</span>: <span class="lg-highlight-string">"cherry"</span>, <span class="lg-highlight-attr">newFlavor</span>: <span class="lg-highlight-string">"orange"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The next example defines
<code class="leafygreen-ui-1l06pbn">
targetFlavor
</code>
and
<code class="leafygreen-ui-1l06pbn">
newFlavor
</code>
variables in
<code class="leafygreen-ui-1l06pbn">
c
</code>
and uses the variables to change the cake flavor from chocolate to
vanilla:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand( {\n update: db.cakeFlavors.getName(),\n updates: [\n { q: { $expr: { $eq: [ \"$flavor\", \"$$targetFlavor\" ] } },\n u: [ { $set: { flavor: \"$$newFlavor\" } } ],\n c: { targetFlavor: \"chocolate\", newFlavor: \"vanilla\" } }\n ]\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">update</span>: <!-- -->db.<span class="lg-highlight-property">cakeFlavors</span>.<span class="lg-highlight-title lg-highlight-function">getName</span>(<!-- -->)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updates</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">q</span>: <!-- -->{ <span class="lg-highlight-attr">$expr</span>: <!-- -->{ <span class="lg-highlight-attr">$eq</span>: <!-- -->[ <span class="lg-highlight-string">"$flavor"</span>, <span class="lg-highlight-string">"$$targetFlavor"</span> ] } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">u</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">flavor</span>: <span class="lg-highlight-string">"$$newFlavor"</span> } } ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">c</span>: <!-- -->{ <span class="lg-highlight-attr">targetFlavor</span>: <span class="lg-highlight-string">"chocolate"</span>, <span class="lg-highlight-attr">newFlavor</span>: <span class="lg-highlight-string">"vanilla"</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-update-command-output">
</span>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Output
<a class="headerlink leafygreen-ui-1kepx47" href="#output" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="output">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The returned document contains a subset of the following fields:
</p>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.ok
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.ok" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.ok">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The status of the command.
</p>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.n
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.n" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.n">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
An
<code class="leafygreen-ui-1l06pbn">
update
</code>
command accepts an array of document updates, some of
which can be
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-upsert">
upserts
</a>
. For an update,
<code class="leafygreen-ui-1l06pbn">
n
</code>
is the
number of documents selected for the update. For an upsert,
<code class="leafygreen-ui-1l06pbn">
n
</code>
is
<code class="leafygreen-ui-1l06pbn">
1
</code>
for the inserted document. The server adds the
<code class="leafygreen-ui-1l06pbn">
n
</code>
values for
all the updates and upserts and returns the total as
<code class="leafygreen-ui-1l06pbn">
update.n
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
If an update operation
results in no change to the document, e.g.
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/set/#mongodb-update-up.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
expression
updates the value to the current value,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-data-update.n" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
n
</code>
</span>
</a>
can be
greater than
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-data-update.nModified" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
nModified
</code>
.
</span>
</a>
</p>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.nModified
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.nModified" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.nModified">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The number of documents updated. If the update operation results in
no change to the document, such as setting the value of the field to
its current value,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-data-update.nModified" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
nModified
</code>
</span>
</a>
can be less than
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-data-update.n" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
n
</code>
.
</span>
</a>
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If a subset of matched documents are updated, such as when an update
would cause some documents to fail schema validation, the value of
<code class="leafygreen-ui-1l06pbn">
nModified
</code>
returned by the
<code class="leafygreen-ui-1l06pbn">
update
</code>
command might not be accurate.
</p>
</div>
</div>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.upserted
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.upserted" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.upserted">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
An array of documents that contains information for each document
inserted through the update with
<code class="leafygreen-ui-1l06pbn">
upsert: true
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
Each document contains the following information:
</p>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.upserted.index
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.upserted.index" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.upserted.index">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
An integer that identifies the update with
<code class="leafygreen-ui-1l06pbn">
upsert:true
</code>
statement in the
<code class="leafygreen-ui-1l06pbn">
updates
</code>
array, which uses a zero-based index.
</p>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.upserted._id
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.upserted._id" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.upserted._id">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
_id
</code>
value of the added document.
</p>
</dd>
</dl>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.writeErrors
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.writeErrors" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.writeErrors">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
An array of documents that contains information regarding any error
encountered during the update operation. The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-data-update.writeErrors" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
writeErrors
</code>
</span>
</a>
array contains an error document for
each update statement that errors.
</p>
<p class="leafygreen-ui-1kp3ins">
Each error document contains the following fields:
</p>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.writeErrors.index
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.writeErrors.index" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.writeErrors.index">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
An integer that identifies the update statement in the
<code class="leafygreen-ui-1l06pbn">
updates
</code>
array, which uses a zero-based index.
</p>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.writeErrors.code
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.writeErrors.code" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.writeErrors.code">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
An integer value identifying the error.
</p>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.writeErrors.errmsg
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.writeErrors.errmsg" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.writeErrors.errmsg">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
A description of the error.
</p>
</dd>
</dl>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.writeConcernError
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.writeConcernError" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.writeConcernError">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Document describing errors that relate to the write concern.
</p>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
7.1
</em>
:
<!-- -->
When
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/update/#mongodb-dbcommand-dbcmd.update">
<code class="leafygreen-ui-1l06pbn">
update
</code>
</a>
executes on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-program-mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
, write concern
errors are always reported, even when one or more write
errors occur.
</p>
<p class="leafygreen-ui-1kp3ins">
In previous releases, the occurrence of write errors could
cause the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
to not report write concern errors.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
writeConcernError
</code>
documents contain the following fields:
</p>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.writeConcernError.code
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.writeConcernError.code" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.writeConcernError.code">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
An integer value identifying the cause of the write concern error.
</p>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.writeConcernError.errmsg
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.writeConcernError.errmsg" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.writeConcernError.errmsg">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
A description of the cause of the write concern error.
</p>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.writeConcernError.errInfo.writeConcern
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.writeConcernError.errInfo.writeConcern" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.writeConcernError.errInfo.writeConcern">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The write concern object used for the corresponding operation. For
information on write concern object fields, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#std-label-wc-specs">
Write Concern Specification
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The write concern object may also contain the following field,
indicating the source of the write concern:
</p>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
update.writeConcernError.errInfo.writeConcern.provenance
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-update.writeConcernError.errInfo.writeConcern.provenance" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-update.writeConcernError.errInfo.writeConcern.provenance">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
A string value indicating where the write concern originated (known as
write concern
<code class="leafygreen-ui-1l06pbn">
provenance
</code>
). The following table shows the possible
values for this field and their significance:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:40%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Provenance
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
clientSupplied
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The write concern was specified in the application.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
customDefault
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The write concern originated from a custom defined
default value. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/setDefaultRWConcern/#mongodb-dbcommand-dbcmd.setDefaultRWConcern">
<code class="leafygreen-ui-1l06pbn">
setDefaultRWConcern
</code>
.
</a>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
getLastErrorDefaults
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The write concern originated from the replica set's
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/#mongodb-rsconf-rsconf.settings.getLastErrorDefaults">
<code class="leafygreen-ui-1l06pbn">
settings.getLastErrorDefaults
</code>
</a>
field.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
implicitDefault
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The write concern originated from the server in absence
of all other write concern specifications.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</dd>
</dl>
</dd>
</dl>
</dd>
</dl>
<p class="leafygreen-ui-1kp3ins">
In addition to the aforementioned update specific return fields, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.runCommand/#mongodb-method-db.runCommand">
<code class="leafygreen-ui-1l06pbn">
db.runCommand()
</code>
</a>
includes additional information:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
for replica sets:
<code class="leafygreen-ui-1l06pbn">
optime
</code>
,
<code class="leafygreen-ui-1l06pbn">
electionId
</code>
,
<code class="leafygreen-ui-1l06pbn">
$clusterTime
</code>
, and
<code class="leafygreen-ui-1l06pbn">
operationTime
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
for sharded clusters:
<code class="leafygreen-ui-1l06pbn">
operationTime
</code>
and
<code class="leafygreen-ui-1l06pbn">
$clusterTime
</code>
.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.runCommand/#std-label-command-response">
db.runCommand Response
</a>
for details on
these fields.
</p>
<p class="leafygreen-ui-1kp3ins">
The following is an example document returned for a successful
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.update" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
update
</code>
</span>
</a>
command that performed an upsert:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"ok\" : 1,\n \"nModified\" : 0,\n \"n\" : 1,\n \"upserted\" : [\n {\n \"index\" : 0,\n \"_id\" : ObjectId(\"52ccb2118908ccd753d65882\")\n }\n ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"ok"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"nModified"</span> <!-- -->: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"n"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"upserted"</span> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"index"</span> <!-- -->: <span class="lg-highlight-number">0</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"52ccb2118908ccd753d65882"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following is an example document returned for a bulk update
involving three update statements, where one update statement was
successful and two other update statements encountered errors:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"ok\" : 1,\n \"nModified\" : 1,\n \"n\" : 1,\n \"writeErrors\" : [\n {\n \"index\" : 1,\n \"code\" : 16837,\n \"errmsg\" : \"The _id field cannot be changed from {_id: 1.0} to {_id: 5.0}.\"\n },\n {\n \"index\" : 2,\n \"code\" : 16837,\n \"errmsg\" : \"The _id field cannot be changed from {_id: 2.0} to {_id: 6.0}.\"\n },\n ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"ok"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"nModified"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"n"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"writeErrors"</span> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"index"</span> <!-- -->: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"code"</span> <!-- -->: <span class="lg-highlight-number">16837</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"errmsg"</span> <!-- -->: <span class="lg-highlight-string">"The _id field cannot be changed from {_id: 1.0} to {_id: 5.0}."</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"index"</span> <!-- -->: <span class="lg-highlight-number">2</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"code"</span> <!-- -->: <span class="lg-highlight-number">16837</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"errmsg"</span> <!-- -->: <span class="lg-highlight-string">"The _id field cannot be changed from {_id: 2.0} to {_id: 6.0}."</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/query/gte/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$gte
<a class="headerlink leafygreen-ui-1kepx47" href="#-gte" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-gte">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="query">
<dt>
<code class="leafygreen-ui-1l06pbn">
$gte
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-query-op.-gte" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-query-op.-gte">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-gte" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$gte
</code>
</span>
</a>
selects the documents where the value of the
specified field is greater than or equal to (i.e.
<code class="leafygreen-ui-1l06pbn">
>=
</code>
) a specified
value (e.g.
<code class="leafygreen-ui-1l06pbn">
value
</code>
.)
</p>
<p class="leafygreen-ui-1kp3ins">
For most data types,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query-comparison/">
comparison
operators
</a>
only perform
comparisons on fields where the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-bson-types">
BSON type
</a>
matches the
query value's type. MongoDB supports limited cross-BSON comparison
through
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#std-label-type-bracketing">
Type Bracketing
<!-- -->
.
</a>
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can use
<code class="leafygreen-ui-1l06pbn">
$gte
</code>
for deployments hosted in the following
environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-gte" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$gte
</code>
</span>
</a>
operator has the following form:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ field: { $gte: value } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">field</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <!-- -->value } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following examples use the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection. Create the
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.insertMany( [\n {\n \"item\": \"nuts\", \"quantity\": 30,\n \"carrier\": { \"name\": \"Shipit\", \"fee\": 3 }\n },\n {\n \"item\": \"bolts\", \"quantity\": 50,\n \"carrier\": { \"name\": \"Shipit\", \"fee\": 4 }\n },\n {\n \"item\": \"washers\", \"quantity\": 10,\n \"carrier\": { \"name\": \"Shipit\", \"fee\": 1 }\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"nuts"</span>, <span class="lg-highlight-string">"quantity"</span>: <span class="lg-highlight-number">30</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"carrier"</span>: <!-- -->{ <span class="lg-highlight-string">"name"</span>: <span class="lg-highlight-string">"Shipit"</span>, <span class="lg-highlight-string">"fee"</span>: <span class="lg-highlight-number">3</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"bolts"</span>, <span class="lg-highlight-string">"quantity"</span>: <span class="lg-highlight-number">50</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"carrier"</span>: <!-- -->{ <span class="lg-highlight-string">"name"</span>: <span class="lg-highlight-string">"Shipit"</span>, <span class="lg-highlight-string">"fee"</span>: <span class="lg-highlight-number">4</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"item"</span>: <span class="lg-highlight-string">"washers"</span>, <span class="lg-highlight-string">"quantity"</span>: <span class="lg-highlight-number">10</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"carrier"</span>: <!-- -->{ <span class="lg-highlight-string">"name"</span>: <span class="lg-highlight-string">"Shipit"</span>, <span class="lg-highlight-string">"fee"</span>: <span class="lg-highlight-number">1</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Match Document Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#match-document-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="match-document-fields">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Select all documents in the
<code class="leafygreen-ui-1l06pbn">
inventory
</code>
collection where
<code class="leafygreen-ui-1l06pbn">
quantity
</code>
is greater than or equal to
<code class="leafygreen-ui-1l06pbn">
20
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.find( { quantity: { $gte: 20 } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">quantity</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <span class="lg-highlight-number">20</span> } } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Example output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":" {\n _id: ObjectId(\"61bb51211b83c864e3bbe037\"),\n item: 'nuts',\n quantity: 30,\n carrier: { name: 'Shipit', fee: 3 }\n },\n {\n _id: ObjectId(\"61bb51211b83c864e3bbe038\"),\n item: 'bolts',\n quantity: 50,\n carrier: { name: 'Shipit', fee: 4 }\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"61bb51211b83c864e3bbe037"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'nuts'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">30</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">carrier</span>: <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'Shipit'</span>, <span class="lg-highlight-attr">fee</span>: <span class="lg-highlight-number">3</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"61bb51211b83c864e3bbe038"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'bolts'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">50</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">carrier</span>: <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'Shipit'</span>, <span class="lg-highlight-attr">fee</span>: <span class="lg-highlight-number">4</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Perform an Update Based on Embedded Document Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#perform-an-update-based-on-embedded-document-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="perform-an-update-based-on-embedded-document-fields">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The following example sets the
<code class="leafygreen-ui-1l06pbn">
price
</code>
field based on a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-query-op.-gte" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$gte
</code>
</span>
</a>
comparison against a field in an embedded document.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.inventory.updateMany(\n { \"carrier.fee\": { $gte: 2 } }, { $set: { \"price\": 9.99 } }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">inventory</span>.<span class="lg-highlight-title lg-highlight-function">updateMany</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"carrier.fee"</span>: <!-- -->{ <span class="lg-highlight-attr">$gte</span>: <span class="lg-highlight-number">2</span> } }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-string">"price"</span>: <span class="lg-highlight-number">9.99</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Example output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n _id: ObjectId(\"61bb51211b83c864e3bbe037\"),\n item: 'nuts',\n quantity: 30,\n carrier: { name: 'Shipit', fee: 3 },\n price: 9.99\n},\n{\n _id: ObjectId(\"61bb51211b83c864e3bbe038\"),\n item: 'bolts',\n quantity: 50,\n carrier: { name: 'Shipit', fee: 4 },\n price: 9.99\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"61bb51211b83c864e3bbe037"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'nuts'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">30</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">carrier</span>: <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'Shipit'</span>, <span class="lg-highlight-attr">fee</span>: <span class="lg-highlight-number">3</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">9.99</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"61bb51211b83c864e3bbe038"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">item</span>: <span class="lg-highlight-string">'bolts'</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">50</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">carrier</span>: <!-- -->{ <span class="lg-highlight-attr">name</span>: <span class="lg-highlight-string">'Shipit'</span>, <span class="lg-highlight-attr">fee</span>: <span class="lg-highlight-number">4</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">9.99</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
This
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.updateMany/#mongodb-method-db.collection.updateMany">
<code class="leafygreen-ui-1l06pbn">
updateMany()
</code>
</a>
operation searches for an
embedded document,
<code class="leafygreen-ui-1l06pbn">
carrier
</code>
, with a subfield named
<code class="leafygreen-ui-1l06pbn">
fee
</code>
. It sets
<code class="leafygreen-ui-1l06pbn">
{ price: 9.99 }
</code>
in each document where
<code class="leafygreen-ui-1l06pbn">
fee
</code>
has a value greater
than or equal to 2.
</p>
<p class="leafygreen-ui-1kp3ins">
To set the value of the
<code class="leafygreen-ui-1l06pbn">
price
</code>
field in only the first document
where
<code class="leafygreen-ui-1l06pbn">
carrier.fee
</code>
is greater than 2, use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.updateMany/#mongodb-method-db.collection.updateMany">
<code class="leafygreen-ui-1l06pbn">
updateMany()
</code>
.
</a>
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
find()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/set/#mongodb-update-up.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
</p>
</li>
</ul>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/aggregation/setUnion/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$setUnion (aggregation)
<a class="headerlink leafygreen-ui-1kepx47" href="#-setunion--aggregation-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-setunion--aggregation-">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="expression">
<dt>
<code class="leafygreen-ui-1l06pbn">
$setUnion
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-expression-exp.-setUnion" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-expression-exp.-setUnion">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Takes two or more arrays and returns an array containing the
elements that appear in any input array.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-setUnion" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$setUnion
</code>
</span>
</a>
has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $setUnion: [ <expression1>, <expression2>, ... ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$setUnion</span>: <!-- -->[ <<!-- -->expression1<!-- -->><!-- -->,<!-- --> <!-- --><<!-- -->expression2<!-- -->><!-- -->,<!-- --> <!-- -->...<!-- --> ] }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The arguments can be any valid
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
as long as they each resolve to an array.
For more information on expressions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
Expression Operators
<!-- -->
.
</a>
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-setUnion" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$setUnion
</code>
</span>
</a>
performs set operation on arrays, treating arrays
as sets. If an array contains duplicate entries,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-setUnion" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$setUnion
</code>
</span>
</a>
ignores the duplicate entries.
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-setUnion" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$setUnion
</code>
</span>
</a>
ignores the order of
the elements.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-setUnion" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$setUnion
</code>
</span>
</a>
filters out duplicates in its result to output an
array that contain only unique entries. The order of the elements in
the output array is unspecified.
</p>
<p class="leafygreen-ui-1kp3ins">
If a set contains a nested array element,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-setUnion" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$setUnion
</code>
</span>
</a>
does
<em>
not
</em>
descend
into the nested array but evaluates the array at top-level.
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:60%"/>
<col style="width:35%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Example
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Result
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $setUnion: [ [ \"a\", \"b\", \"a\" ], [ \"b\", \"a\" ] ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1agdxuk" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$setUnion</span>: <!-- -->[ <!-- -->[ <span class="lg-highlight-string">"a"</span>, <span class="lg-highlight-string">"b"</span>, <span class="lg-highlight-string">"a"</span> ]<!-- -->, <!-- -->[ <span class="lg-highlight-string">"b"</span>, <span class="lg-highlight-string">"a"</span> ] ] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[ \"b\", \"a\" ]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[ <span class="lg-highlight-string">"b"</span>, <span class="lg-highlight-string">"a"</span> ]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $setUnion: [ [ \"a\", \"b\" ], [ [ \"a\", \"b\" ] ] ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1agdxuk" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">$setUnion</span>: <!-- -->[ <!-- -->[ <span class="lg-highlight-string">"a"</span>, <span class="lg-highlight-string">"b"</span> ]<!-- -->, <!-- -->[ <!-- -->[ <span class="lg-highlight-string">"a"</span>, <span class="lg-highlight-string">"b"</span> ] ] ] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[ [ \"a\", \"b\" ], \"b\", \"a\" ]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1agdxuk" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">[ <!-- -->[ <span class="lg-highlight-string">"a"</span>, <span class="lg-highlight-string">"b"</span> ]<!-- -->, <span class="lg-highlight-string">"b"</span>, <span class="lg-highlight-string">"a"</span> ]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.2, the sort order for
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-setUnion" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$setUnion
</code>
</span>
</a>
is undefined. To sort an array, refer to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/sortArray/#mongodb-expression-exp.-sortArray">
<code class="leafygreen-ui-1l06pbn">
$sortArray
</code>
.
</a>
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Consider an
<code class="leafygreen-ui-1l06pbn">
flowers
</code>
collection with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.flowers.insertMany( [\n { \"_id\" : 1, \"flowerFieldA\" : [ \"rose\", \"orchid\" ], \"flowerFieldB\" : [ \"rose\", \"orchid\" ] },\n { \"_id\" : 2, \"flowerFieldA\" : [ \"rose\", \"orchid\" ], \"flowerFieldB\" : [ \"orchid\", \"rose\", \"orchid\" ] },\n { \"_id\" : 3, \"flowerFieldA\" : [ \"rose\", \"orchid\" ], \"flowerFieldB\" : [ \"rose\", \"orchid\", \"jasmine\" ] },\n { \"_id\" : 4, \"flowerFieldA\" : [ \"rose\", \"orchid\" ], \"flowerFieldB\" : [ \"jasmine\", \"rose\" ] },\n { \"_id\" : 5, \"flowerFieldA\" : [ \"rose\", \"orchid\" ], \"flowerFieldB\" : [ ] },\n { \"_id\" : 6, \"flowerFieldA\" : [ \"rose\", \"orchid\" ], \"flowerFieldB\" : [ [ \"rose\" ], [ \"orchid\" ] ] },\n { \"_id\" : 7, \"flowerFieldA\" : [ \"rose\", \"orchid\" ], \"flowerFieldB\" : [ [ \"rose\", \"orchid\" ] ] },\n { \"_id\" : 8, \"flowerFieldA\" : [ ], \"flowerFieldB\" : [ ] },\n { \"_id\" : 9, \"flowerFieldA\" : [ ], \"flowerFieldB\" : [ \"rose\" ] }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">flowers</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"flowerFieldA"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"flowerFieldA"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"orchid"</span>, <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"flowerFieldA"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span>, <span class="lg-highlight-string">"jasmine"</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"flowerFieldA"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"jasmine"</span>, <span class="lg-highlight-string">"rose"</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"flowerFieldA"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span> <!-- -->: <!-- -->[ <!-- -->] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">6</span>, <span class="lg-highlight-string">"flowerFieldA"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span> <!-- -->: <!-- -->[ <!-- -->[ <span class="lg-highlight-string">"rose"</span> ]<!-- -->, <!-- -->[ <span class="lg-highlight-string">"orchid"</span> ] ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">7</span>, <span class="lg-highlight-string">"flowerFieldA"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span> <!-- -->: <!-- -->[ <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ] ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">8</span>, <span class="lg-highlight-string">"flowerFieldA"</span> <!-- -->: <!-- -->[ <!-- -->]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span> <!-- -->: <!-- -->[ <!-- -->] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">9</span>, <span class="lg-highlight-string">"flowerFieldA"</span> <!-- -->: <!-- -->[ <!-- -->]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"rose"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following operation uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-expression-exp.-setUnion" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$setUnion
</code>
</span>
</a>
operator to
return an array of elements found in the
<code class="leafygreen-ui-1l06pbn">
flowerFieldA
</code>
array or the
<code class="leafygreen-ui-1l06pbn">
flowerFieldB
</code>
array or both:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.flowers.aggregate(\n [\n { $project: { flowerFieldA:1, flowerFieldB: 1, allValues: { $setUnion: [ \"$flowerFieldA\", \"$flowerFieldB\" ] }, _id: 0 } }\n ]\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">flowers</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$project</span>: <!-- -->{ <span class="lg-highlight-attr">flowerFieldA</span>:<span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">flowerFieldB</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">allValues</span>: <!-- -->{ <span class="lg-highlight-attr">$setUnion</span>: <!-- -->[ <span class="lg-highlight-string">"$flowerFieldA"</span>, <span class="lg-highlight-string">"$flowerFieldB"</span> ] }<!-- -->, <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">0</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following results:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"flowerFieldA\": [ \"rose\", \"orchid\" ], \"flowerFieldB\": [ \"rose\", \"orchid\" ], \"allValues\": [ \"orchid\", \"rose\" ] }\n{ \"flowerFieldA\": [ \"rose\", \"orchid\" ], \"flowerFieldB\": [ \"orchid\", \"rose\", \"orchid\" ], \"allValues\": [ \"orchid\", \"rose\" ] }\n{ \"flowerFieldA\": [ \"rose\", \"orchid\" ], \"flowerFieldB\": [ \"rose\", \"orchid\", \"jasmine\" ], \"allValues\": [ \"orchid\", \"rose\", \"jasmine\" ] }\n{ \"flowerFieldA\": [ \"rose\", \"orchid\" ], \"flowerFieldB\": [ \"jasmine\", \"rose\" ], \"allValues\": [ \"orchid\", \"rose\", \"jasmine\" ] }\n{ \"flowerFieldA\": [ \"rose\", \"orchid\" ], \"flowerFieldB\": [ ], \"allValues\": [ \"orchid\", \"rose\" ] }\n{ \"flowerFieldA\": [ \"rose\", \"orchid\" ], \"flowerFieldB\": [ [ \"rose\" ], [ \"orchid\" ] ], \"allValues\": [ \"orchid\", \"rose\", [ \"rose\" ], [ \"orchid\" ] ] }\n{ \"flowerFieldA\": [ \"rose\", \"orchid\" ], \"flowerFieldB\": [ [ \"rose\", \"orchid\" ] ], \"allValues\": [ \"orchid\", \"rose\", [ \"rose\", \"orchid\" ] ] }\n{ \"flowerFieldA\": [ ], \"flowerFieldB\": [ ], \"allValues\": [ ] }\n{ \"flowerFieldA\": [ ], \"flowerFieldB\": [ \"rose\" ], \"allValues\": [ \"rose\" ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"flowerFieldA"</span>: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span>: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"allValues"</span>: <!-- -->[ <span class="lg-highlight-string">"orchid"</span>, <span class="lg-highlight-string">"rose"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"flowerFieldA"</span>: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span>: <!-- -->[ <span class="lg-highlight-string">"orchid"</span>, <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"allValues"</span>: <!-- -->[ <span class="lg-highlight-string">"orchid"</span>, <span class="lg-highlight-string">"rose"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"flowerFieldA"</span>: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span>: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span>, <span class="lg-highlight-string">"jasmine"</span> ]<!-- -->, <span class="lg-highlight-string">"allValues"</span>: <!-- -->[ <span class="lg-highlight-string">"orchid"</span>, <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"jasmine"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"flowerFieldA"</span>: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span>: <!-- -->[ <span class="lg-highlight-string">"jasmine"</span>, <span class="lg-highlight-string">"rose"</span> ]<!-- -->, <span class="lg-highlight-string">"allValues"</span>: <!-- -->[ <span class="lg-highlight-string">"orchid"</span>, <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"jasmine"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"flowerFieldA"</span>: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span>: <!-- -->[ <!-- -->]<!-- -->, <span class="lg-highlight-string">"allValues"</span>: <!-- -->[ <span class="lg-highlight-string">"orchid"</span>, <span class="lg-highlight-string">"rose"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"flowerFieldA"</span>: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span>: <!-- -->[ <!-- -->[ <span class="lg-highlight-string">"rose"</span> ]<!-- -->, <!-- -->[ <span class="lg-highlight-string">"orchid"</span> ] ]<!-- -->, <span class="lg-highlight-string">"allValues"</span>: <!-- -->[ <span class="lg-highlight-string">"orchid"</span>, <span class="lg-highlight-string">"rose"</span>, <!-- -->[ <span class="lg-highlight-string">"rose"</span> ]<!-- -->, <!-- -->[ <span class="lg-highlight-string">"orchid"</span> ] ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"flowerFieldA"</span>: <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span>: <!-- -->[ <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ] ]<!-- -->, <span class="lg-highlight-string">"allValues"</span>: <!-- -->[ <span class="lg-highlight-string">"orchid"</span>, <span class="lg-highlight-string">"rose"</span>, <!-- -->[ <span class="lg-highlight-string">"rose"</span>, <span class="lg-highlight-string">"orchid"</span> ] ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"flowerFieldA"</span>: <!-- -->[ <!-- -->]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span>: <!-- -->[ <!-- -->]<!-- -->, <span class="lg-highlight-string">"allValues"</span>: <!-- -->[ <!-- -->] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"flowerFieldA"</span>: <!-- -->[ <!-- -->]<!-- -->, <span class="lg-highlight-string">"flowerFieldB"</span>: <!-- -->[ <span class="lg-highlight-string">"rose"</span> ]<!-- -->, <span class="lg-highlight-string">"allValues"</span>: <!-- -->[ <span class="lg-highlight-string">"rose"</span> ] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/tutorial/configure-a-delayed-replica-set-member/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Configure a Delayed Self-Managed Replica Set Member
<a class="headerlink leafygreen-ui-1kepx47" href="#configure-a-delayed-self-managed-replica-set-member" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="configure-a-delayed-self-managed-replica-set-member">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#related-documents" target="_self">
<span>
Related Documents
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
To configure a delayed secondary member, set its
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/#mongodb-rsconf-rsconf.members-n-.priority">
<code class="leafygreen-ui-1l06pbn">
members[n].priority
</code>
</a>
value to
<code class="leafygreen-ui-1l06pbn">
0
</code>
, its
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/#mongodb-rsconf-rsconf.members-n-.hidden">
<code class="leafygreen-ui-1l06pbn">
members[n].hidden
</code>
</a>
value to
<code class="leafygreen-ui-1l06pbn">
true
</code>
, and
its
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/#mongodb-rsconf-rsconf.members-n-.secondaryDelaySecs">
<code class="leafygreen-ui-1l06pbn">
members[n].secondaryDelaySecs
</code>
</a>
value to the
number of seconds to delay.
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The length of the secondary
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/#mongodb-rsconf-rsconf.members-n-.secondaryDelaySecs">
<code class="leafygreen-ui-1l06pbn">
members[n].secondaryDelaySecs
</code>
</a>
must
fit within the window of the oplog. If the oplog is shorter than
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/#mongodb-rsconf-rsconf.members-n-.secondaryDelaySecs">
<code class="leafygreen-ui-1l06pbn">
members[n].secondaryDelaySecs
</code>
</a>
window, the delayed member cannot successfully replicate
operations.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
When you configure a delayed member, the delay
applies both to replication and to the member's
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-oplog">
oplog
</a>
. For
details on delayed members and their uses, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/replica-set-delayed-member/">
Delayed Replica Set Members
<!-- -->
.
</a>
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following example sets a 1-hour delay on a secondary member
currently at the index
<code class="leafygreen-ui-1l06pbn">
0
</code>
in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/#mongodb-rsconf-rsconf.members">
<code class="leafygreen-ui-1l06pbn">
members
</code>
</a>
array. To set the delay, issue
the following sequence of operations in a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
session
that is connected to the primary:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"cfg = rs.conf()\ncfg.members[0].priority = 0\ncfg.members[0].hidden = true\ncfg.members[0].secondaryDelaySecs = 3600\nrs.reconfig(cfg)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">cfg <!-- -->= <!-- -->rs.<span class="lg-highlight-title lg-highlight-function">conf</span>(<!-- -->)</td></tr><tr class=""><td class="leafygreen-ui-7razhx">cfg.<span class="lg-highlight-property">members</span>[<span class="lg-highlight-number">0</span>].<span class="lg-highlight-property">priority</span> <!-- -->= <span class="lg-highlight-number">0</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cfg.<span class="lg-highlight-property">members</span>[<span class="lg-highlight-number">0</span>].<span class="lg-highlight-property">hidden</span> <!-- -->= <span class="lg-highlight-literal">true</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">cfg.<span class="lg-highlight-property">members</span>[<span class="lg-highlight-number">0</span>].<span class="lg-highlight-property">secondaryDelaySecs</span> <!-- -->= <span class="lg-highlight-number">3600</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">rs.<span class="lg-highlight-title lg-highlight-function">reconfig</span>(<!-- -->cfg)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
After the replica set reconfigures, the delayed secondary member cannot
become
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-primary">
primary
</a>
and is hidden from applications. The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/#mongodb-rsconf-rsconf.members-n-.secondaryDelaySecs">
<code class="leafygreen-ui-1l06pbn">
members[n].secondaryDelaySecs
</code>
</a>
value delays both
replication and the member's
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-oplog">
oplog
</a>
by 3600 seconds (1 hour).
</p>
<p class="leafygreen-ui-1kp3ins">
When updating the replica configuration object, access the replica set
members in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/#mongodb-rsconf-rsconf.members">
<code class="leafygreen-ui-1l06pbn">
members
</code>
</a>
array with the
<strong>
array index
</strong>
. The array index begins with
<code class="leafygreen-ui-1l06pbn">
0
</code>
. Do
<strong>
not
</strong>
confuse
this index value with the value of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/#mongodb-rsconf-rsconf.members-n-._id">
<code class="leafygreen-ui-1l06pbn">
members[n]._id
</code>
</a>
field in each document in
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/#mongodb-rsconf-rsconf.members">
<code class="leafygreen-ui-1l06pbn">
members
</code>
</a>
array.
</p>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/rs.reconfig/#mongodb-method-rs.reconfig">
<code class="leafygreen-ui-1l06pbn">
rs.reconfig()
</code>
</a>
shell method can force the current
primary to step down, which causes an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/replica-set-elections/#std-label-replica-set-elections">
election
</a>
. When the primary steps down, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
closes all client connections. While this
typically takes 10-20 seconds, try to make these changes during
scheduled maintenance periods.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Avoid reconfiguring replica sets that contain members of different
MongoDB versions as validation rules may differ across MongoDB versions.
</p>
</li>
</ul>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Related Documents
<a class="headerlink leafygreen-ui-1kepx47" href="#related-documents" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="related-documents">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/#mongodb-rsconf-rsconf.members-n-.secondaryDelaySecs">
<code class="leafygreen-ui-1l06pbn">
members[n].secondaryDelaySecs
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/rs.reconfig/#std-label-replica-set-reconfiguration-usage">
Replica Set Reconfiguration
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/replica-set-oplog/#std-label-replica-set-oplog-sizing">
Oplog Size
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/change-oplog-size/">
Change the Oplog Size of Self-Managed Replica Set Members
</a>
tutorial
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/replica-set-elections/">
Replica Set Elections
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/release-notes/8.0-upgrade-replica-set/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Upgrade a Replica Set to 8.0
<a class="headerlink leafygreen-ui-1kepx47" href="#upgrade-a-replica-set-to-8.0" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="upgrade-a-replica-set-to-8.0">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#upgrade-recommendations-and-checklists" target="_self">
<span>
Upgrade Recommendations and Checklists
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#prerequisites" target="_self">
<span>
Prerequisites
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#download-newversion-binaries" target="_self">
<span>
Download
<!-- -->
8.0
<!-- -->
Binaries
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#upgrade-procedure" target="_self">
<span>
Upgrade Procedure
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#additional-upgrade-procedures" target="_self">
<span>
Additional Upgrade Procedures
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
Familiarize yourself with the content of this document, including
thoroughly reviewing the prerequisites, prior to upgrading to MongoDB
8.0.
</p>
<p class="leafygreen-ui-1kp3ins">
The following steps outline the procedure to upgrade a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
that is a replica set member from version
<!-- -->
7.0
<!-- -->
to
<!-- -->
8.0
<!-- -->
.
</p>
<p class="leafygreen-ui-1kp3ins">
If you need guidance on upgrading to
<!-- -->
8.0
<!-- -->
,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/products/consulting?tck=docs_server" target="_self">
<span>
MongoDB
professional services
</span>
</a>
offer major version upgrade support to help ensure a smooth transition
without interruption to your MongoDB application.
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Upgrade Recommendations and Checklists
<a class="headerlink leafygreen-ui-1kepx47" href="#upgrade-recommendations-and-checklists" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="upgrade-recommendations-and-checklists">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
When upgrading, consider the following:
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Upgrade Version Path
<a class="headerlink leafygreen-ui-1kepx47" href="#upgrade-version-path" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="upgrade-version-path">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To upgrade an existing MongoDB deployment to
<!-- -->
8.0
<!-- -->
, you must be
running a
<!-- -->
7.0-series
<!-- -->
release.
</p>
<p class="leafygreen-ui-1kp3ins">
To upgrade from a version earlier than the
<!-- -->
7.0-series
<!-- -->
, you must
successively upgrade major releases until you have upgraded to
<!-- -->
7.0-series
<!-- -->
. For example, if you are running a
<!-- -->
6.0-series
<!-- -->
, you must
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/7.0/#std-label-7.0-upgrade">
upgrade first to 7.0
</a>
<em>
before
</em>
you can upgrade to
<!-- -->
8.0
<!-- -->
.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Check Driver Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#check-driver-compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="check-driver-compatibility">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Before you upgrade MongoDB, check that you're using a MongoDB
<!-- -->
8.0
<!-- -->
-compatible driver. Consult the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
driver documentation
</span>
</a>
for your specific driver to verify
compatibility with MongoDB
<!-- -->
8.0
<!-- -->
.
</p>
<p class="leafygreen-ui-1kp3ins">
Upgraded deployments that run on incompatible drivers might encounter
unexpected or undefined behavior.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Preparedness
<a class="headerlink leafygreen-ui-1kepx47" href="#preparedness" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="preparedness">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Before beginning your upgrade, see the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/8.0-compatibility/#std-label-8.0-compatibility">
Compatibility Changes in MongoDB 8.0
</a>
document to
ensure that your applications and deployments are compatible with
MongoDB
<!-- -->
8.0
<!-- -->
. Resolve the incompatibilities in your deployment
before starting the upgrade.
</p>
<p class="leafygreen-ui-1kp3ins">
Before upgrading MongoDB, always test your application in a staging
environment before deploying the upgrade to your production
environment.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Downgrade Consideration
<a class="headerlink leafygreen-ui-1kepx47" href="#downgrade-consideration" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="downgrade-consideration">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
You cannot downgrade your deployment's binary version without assistance from
support.
</p>
<p class="leafygreen-ui-1kp3ins">
To learn more, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/8.0-downgrade/#std-label-8.0-downgrade">
Downgrade
<!-- -->
8.0
<!-- -->
to
<!-- -->
7.0
<!-- -->
.
</a>
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Prerequisites
<a class="headerlink leafygreen-ui-1kepx47" href="#prerequisites" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="prerequisites">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
All Members Version
<a class="headerlink leafygreen-ui-1kepx47" href="#all-members-version" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="all-members-version">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
All replica set members must be running version
<!-- -->
7.0
<!-- -->
. To
upgrade a replica set from
<!-- -->
6.0-series
<!-- -->
and earlier,
<em>
first
</em>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/7.0-upgrade-replica-set/#std-label-7.0-upgrade-replica-set">
upgrade all members of the replica set to the latest
7.0-series release
</a>
, and then follow the procedure to
upgrade from MongoDB
<!-- -->
7.0
<!-- -->
to
<!-- -->
8.0
<!-- -->
.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Feature Compatibility Version
<a class="headerlink leafygreen-ui-1kepx47" href="#feature-compatibility-version" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="feature-compatibility-version">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<!-- -->
7.0
<!-- -->
replica set must have
<code class="leafygreen-ui-1l06pbn">
featureCompatibilityVersion
</code>
set to
<code class="leafygreen-ui-1l06pbn">
"7.0"
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
To ensure that all members of the replica set have
<code class="leafygreen-ui-1l06pbn">
featureCompatibilityVersion
</code>
set to
<code class="leafygreen-ui-1l06pbn">
"7.0"
</code>
, connect to each
replica set member and check the
<code class="leafygreen-ui-1l06pbn">
featureCompatibilityVersion
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.adminCommand( { getParameter: 1, featureCompatibilityVersion: 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>( <!-- -->{ <span class="lg-highlight-attr">getParameter</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">featureCompatibilityVersion</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
All members should return a result that includes
<code class="leafygreen-ui-1l06pbn">
"featureCompatibilityVersion" : { "version" : "7.0" }
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
To set or update
<code class="leafygreen-ui-1l06pbn">
featureCompatibilityVersion
</code>
, run the
following command on the primary. A majority of the data-bearing
members must be available:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.adminCommand( { setFeatureCompatibilityVersion: \"7.0\" } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>( <!-- -->{ <span class="lg-highlight-attr">setFeatureCompatibilityVersion</span>: <span class="lg-highlight-string">"7.0"</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For more information, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/setFeatureCompatibilityVersion/#mongodb-dbcommand-dbcmd.setFeatureCompatibilityVersion">
<code class="leafygreen-ui-1l06pbn">
setFeatureCompatibilityVersion
</code>
.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Replica Set Member State
<a class="headerlink leafygreen-ui-1kepx47" href="#replica-set-member-state" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="replica-set-member-state">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Ensure that no replica set member is in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-states/#mongodb-replstate-replstate.ROLLBACK">
<code class="leafygreen-ui-1l06pbn">
ROLLBACK
</code>
</a>
or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-states/#mongodb-replstate-replstate.RECOVERING">
<code class="leafygreen-ui-1l06pbn">
RECOVERING
</code>
</a>
state by issuing the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/replSetGetStatus/#mongodb-dbcommand-dbcmd.replSetGetStatus">
<code class="leafygreen-ui-1l06pbn">
replSetGetStatus
</code>
</a>
command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.adminCommand( { replSetGetStatus: 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>( <!-- -->{ <span class="lg-highlight-attr">replSetGetStatus</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Download
<!-- -->
8.0
<!-- -->
Binaries
<a class="headerlink leafygreen-ui-1kepx47" href="#download-newversion-binaries" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="download-newversion-binaries">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Use a Package Manager
<a class="headerlink leafygreen-ui-1kepx47" href="#use-a-package-manager" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="use-a-package-manager">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If you installed MongoDB from the MongoDB
<code class="leafygreen-ui-1l06pbn">
apt
</code>
,
<code class="leafygreen-ui-1l06pbn">
yum
</code>
,
<code class="leafygreen-ui-1l06pbn">
dnf
</code>
, or
<code class="leafygreen-ui-1l06pbn">
zypper
</code>
repositories, you should upgrade to
<!-- -->
8.0
<!-- -->
using your package
manager.
</p>
<p class="leafygreen-ui-1kp3ins">
Follow the appropriate
<a class="leafygreen-ui-tqgtui" href="/docs/manual/installation/#std-label-tutorial-installation">
8.0 installation instructions
</a>
for your Linux system. This
will involve adding a repository for the new release, then performing
the actual upgrade process.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Manually
<a class="headerlink leafygreen-ui-1kepx47" href="#manually" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="manually">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If you have not installed MongoDB using a package manager, you can
manually download the MongoDB binaries from the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/try/download?tck=docs_server" target="_self">
<span>
MongoDB Download
Center
</span>
</a>
.
</p>
<p class="leafygreen-ui-1kp3ins">
See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/installation/#std-label-tutorial-installation">
8.0 installation instructions
</a>
for more information.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Upgrade Procedure
<a class="headerlink leafygreen-ui-1kepx47" href="#upgrade-procedure" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="upgrade-procedure">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can upgrade from MongoDB
<!-- -->
7.0
<!-- -->
to
<!-- -->
8.0
<!-- -->
using a
"rolling" upgrade to minimize downtime by upgrading the members
individually while the other members are available.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"HowTo","steps":[{"@type":"HowToStep","text":"To shut down the mongod process, use\nmongosh to connect to the replica set member and\nrun the following command:","name":"Shut down the replica set member."},{"@type":"HowToStep","text":"Upgrade the secondary\nmembers of the replica set one at a time:Replace the 7.0 binary with the 8.0 binary.Restart the member.","name":"Upgrade secondary members of the replica set."},{"@type":"HowToStep","text":"Connect mongosh to the primary and use\nrs.stepDown() to step down the primary and force an\nelection of a new primary.","name":"Step down the replica set primary."},{"@type":"HowToStep","text":"When rs.status() shows that the primary has stepped down\nand another member has assumed PRIMARY state, upgrade the\nstepped-down primary:Shut down the stepped-down primary and replace the\nmongod binary with the 8.0 binary.Restart the member.","name":"Upgrade the primary."},{"@type":"HowToStep","text":"At this point, you can run the 8.0 binaries without the\n8.0 features that are incompatible with 7.0.To enable these 8.0 features, set the feature compatibility\nversion (fCV) to 8.0.Enabling these backwards-incompatible features can complicate the\ndowngrade process since you must remove any persisted backwards-incompatible\nfeatures before you downgrade.It is recommended that after upgrading, you allow your deployment to run\nwithout enabling these features for a burn-in period to ensure the\nlikelihood of downgrade is minimal. When you are confident that the\nlikelihood of downgrade is minimal, enable these features.Ensure that no initial sync is in progress. Running\nsetFeatureCompatibilityVersion command while an\ninitial sync is in progress will cause the initial sync to\nrestart.On the primary, run the setFeatureCompatibilityVersion\ncommand in the admin database:Setting featureCompatibilityVersion (fCV) : \"8.0\"\nimplicitly performs a replSetReconfig to add the\nterm field to the configuration document and blocks\nuntil the new configuration propagates to a majority of replica\nset members.This command must perform writes to an internal system\ncollection. If for any reason the command does not complete\nsuccessfully, you can safely retry the command on the primary as\nthe operation is idempotent.","name":"Enable backwards-incompatible 8.0 features."}],"name":"Upgrade Procedure","image":"https://webimages.mongodb.com/_com_assets/cms/kuyj2focmkbxv7gh3-stacked_default_slate_blue.svg?auto=format%252Ccompress"}
</script>
<div class="css-4nyere eccljxs0">
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
1
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Shut down the replica set member.
<a class="headerlink leafygreen-ui-1kepx47" href="#shut-down-the-replica-set-member." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="shut-down-the-replica-set-member.">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To shut down the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
process, use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
to connect to the replica set member and
run the following command:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.adminCommand( { shutdown: 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>( <!-- -->{ <span class="lg-highlight-attr">shutdown</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
2
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Upgrade secondary members of the replica set.
<a class="headerlink leafygreen-ui-1kepx47" href="#upgrade-secondary-members-of-the-replica-set." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="upgrade-secondary-members-of-the-replica-set.">
</div>
</a>
</h3>
<span class="leafygreen-ui-1qnjd6d" id="std-label-8.0-upgrade-rs-secondaries">
</span>
<p class="leafygreen-ui-1kp3ins">
Upgrade the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/replica-set-members/#std-label-replica-set-secondary-members">
secondary
</a>
members of the replica set one at a time:
</p>
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Replace the
<!-- -->
7.0
<!-- -->
binary with the
<!-- -->
8.0
<!-- -->
binary.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Restart the member.
</p>
</li>
</ol>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
3
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Step down the replica set primary.
<a class="headerlink leafygreen-ui-1kepx47" href="#step-down-the-replica-set-primary." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="step-down-the-replica-set-primary.">
</div>
</a>
</h3>
<span class="leafygreen-ui-1qnjd6d" id="std-label-8.0-upgrade-rs-step-down-primary">
</span>
<p class="leafygreen-ui-1kp3ins">
Connect
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
to the primary and use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/rs.stepDown/#mongodb-method-rs.stepDown">
<code class="leafygreen-ui-1l06pbn">
rs.stepDown()
</code>
</a>
to step down the primary and force an
election of a new primary.
</p>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
4
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Upgrade the primary.
<a class="headerlink leafygreen-ui-1kepx47" href="#upgrade-the-primary." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="upgrade-the-primary.">
</div>
</a>
</h3>
<span class="leafygreen-ui-1qnjd6d" id="std-label-8.0-upgrade-rs-primary">
</span>
<p class="leafygreen-ui-1kp3ins">
When
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/rs.status/#mongodb-method-rs.status">
<code class="leafygreen-ui-1l06pbn">
rs.status()
</code>
</a>
shows that the primary has stepped down
and another member has assumed
<code class="leafygreen-ui-1l06pbn">
PRIMARY
</code>
state, upgrade the
stepped-down primary:
</p>
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Shut down the stepped-down primary and replace the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
binary with the
<!-- -->
8.0
<!-- -->
binary.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Restart the member.
</p>
</li>
</ol>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
5
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Enable backwards-incompatible
<!-- -->
8.0
<!-- -->
features.
<a class="headerlink leafygreen-ui-1kepx47" href="#enable-backwards-incompatible--features." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="enable-backwards-incompatible--features.">
</div>
</a>
</h3>
<span class="leafygreen-ui-1qnjd6d" id="std-label-8.0-upgrade-enable-features-primary">
</span>
<p class="leafygreen-ui-1kp3ins">
At this point, you can run the
<!-- -->
8.0
<!-- -->
binaries without the
<!-- -->
8.0
<!-- -->
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/8.0-compatibility/#std-label-8.0-downgrade-considerations">
features
</a>
that are incompatible with
<!-- -->
7.0
<!-- -->
.
</p>
<p class="leafygreen-ui-1kp3ins">
To enable these
<!-- -->
8.0
<!-- -->
features, set the feature compatibility
version (
<code class="leafygreen-ui-1l06pbn">
fCV
</code>
) to
<!-- -->
8.0
<!-- -->
.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Enabling these backwards-incompatible features can complicate the
downgrade process since you must remove any persisted backwards-incompatible
features before you downgrade.
</p>
<p class="leafygreen-ui-1kp3ins">
It is recommended that after upgrading, you allow your deployment to run
without enabling these features for a burn-in period to ensure the
likelihood of downgrade is minimal. When you are confident that the
likelihood of downgrade is minimal, enable these features.
</p>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Ensure that no initial sync is in progress. Running
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/setFeatureCompatibilityVersion/#mongodb-dbcommand-dbcmd.setFeatureCompatibilityVersion">
<code class="leafygreen-ui-1l06pbn">
setFeatureCompatibilityVersion
</code>
</a>
command while an
initial sync is in progress will cause the initial sync to
restart.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
On the primary, run the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/setFeatureCompatibilityVersion/#mongodb-dbcommand-dbcmd.setFeatureCompatibilityVersion">
<code class="leafygreen-ui-1l06pbn">
setFeatureCompatibilityVersion
</code>
</a>
command in the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.adminCommand( { setFeatureCompatibilityVersion: \"8.0\" } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>( <!-- -->{ <span class="lg-highlight-attr">setFeatureCompatibilityVersion</span>: <span class="lg-highlight-string">"8.0"</span> } )</td></tr></tbody></table></code></pre>
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</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Setting
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/setFeatureCompatibilityVersion/#std-label-set-fcv">
featureCompatibilityVersion (fCV) : "8.0"
</a>
implicitly performs a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/replSetReconfig/#mongodb-dbcommand-dbcmd.replSetReconfig">
<code class="leafygreen-ui-1l06pbn">
replSetReconfig
</code>
</a>
to add the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/#mongodb-rsconf-rsconf.term">
<code class="leafygreen-ui-1l06pbn">
term
</code>
</a>
field to the configuration document and blocks
until the new configuration propagates to a majority of replica
set members.
</p>
<p class="leafygreen-ui-1kp3ins">
This command must perform writes to an internal system
collection. If for any reason the command does not complete
successfully, you can safely retry the command on the primary as
the operation is idempotent.
</p>
</section>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Additional Upgrade Procedures
<a class="headerlink leafygreen-ui-1kepx47" href="#additional-upgrade-procedures" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="additional-upgrade-procedures">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
To upgrade a standalone, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/8.0-upgrade-standalone/#std-label-8.0-upgrade-standalone">
Upgrade a Standalone to 8.0
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
To upgrade a sharded cluster, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/8.0-upgrade-sharded-cluster/#std-label-8.0-upgrade-sharded-cluster">
Upgrade a Sharded Cluster to 8.0
<!-- -->
.
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/tutorial/backup-sharded-cluster-with-database-dumps/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Back Up a Self-Managed Sharded Cluster with a Database Dump
<a class="headerlink leafygreen-ui-1kepx47" href="#back-up-a-self-managed-sharded-cluster-with-a-database-dump" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="back-up-a-self-managed-sharded-cluster-with-a-database-dump">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#about-this-task" target="_self">
<span>
About this Task
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#before-you-begin" target="_self">
<span>
Before you Begin
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#steps" target="_self">
<span>
Steps
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#next-steps" target="_self">
<span>
Next Steps
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 7.1 (also available starting in 7.0.2,
6.0.11, and 5.0.22), you can back up data on sharded clusters
using
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/database-tools/mongodump/#std-program-mongodump" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongodump
</code>
.
</span>
</a>
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
About this Task
<a class="headerlink leafygreen-ui-1kepx47" href="#about-this-task" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="about-this-task">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/database-tools/mongodump/#std-program-mongodump" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongodump
</code>
</span>
</a>
is a utility that creates a binary export of database
content. You can use the
<code class="leafygreen-ui-1l06pbn">
mongodump
</code>
utility to take self-managed backups of
a sharded cluster.
</p>
<p class="leafygreen-ui-1kp3ins">
To back up a sharded cluster with
<code class="leafygreen-ui-1l06pbn">
mongodump
</code>
, you must stop
the balancer, stop writes, and stop any schema transformation
operations on the cluster. This helps reduce the likelihood of
inconsistencies in the backup.
</p>
<p class="leafygreen-ui-1kp3ins">
MongoDB provides backup and restore operations that can run with the balancer
and running transactions through the following services:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/atlas/database?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/cloud/cloud-manager?tck=docs_server" target="_self">
<span>
MongoDB Cloud Manager
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/products/ops-manager?tck=docs_server" target="_self">
<span>
MongoDB Ops Manager
</span>
</a>
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Before you Begin
<a class="headerlink leafygreen-ui-1kepx47" href="#before-you-begin" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="before-you-begin">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This task uses
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/database-tools/mongodump/#std-program-mongodump" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongodump
</code>
</span>
</a>
to back up a sharded cluster. Ensure
that you have a cluster running that contains data in sharded collections.
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Version Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#version-compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="version-compatibility">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
This procedure requires a version of MongoDB that supports fsync
locking from
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-program-mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 7.1 (also available starting in 7.0.2,
6.0.11, and 5.0.22)
<!-- -->
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/fsync/#mongodb-dbcommand-dbcmd.fsync">
<code class="leafygreen-ui-1l06pbn">
fsync
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/fsyncUnlock/#mongodb-dbcommand-dbcmd.fsyncUnlock">
<code class="leafygreen-ui-1l06pbn">
fsyncUnlock
</code>
</a>
commands
<!-- -->
can run on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-program-mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
to lock and unlock a sharded cluster.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Admin Privileges
<a class="headerlink leafygreen-ui-1kepx47" href="#admin-privileges" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="admin-privileges">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To use this procedure, your MongoDB user must have the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-fsync">
<code class="leafygreen-ui-1l06pbn">
fsync
</code>
</a>
authorization, which can be available
through a custom role or using the built-in
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/built-in-roles/#mongodb-authrole-hostManager">
<code class="leafygreen-ui-1l06pbn">
hostManager
</code>
</a>
role.
</p>
<p class="leafygreen-ui-1kp3ins">
With this authorization you can run the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/fsync/#mongodb-dbcommand-dbcmd.fsync">
<code class="leafygreen-ui-1l06pbn">
fsync
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/fsyncUnlock/#mongodb-dbcommand-dbcmd.fsyncUnlock">
<code class="leafygreen-ui-1l06pbn">
fsyncUnlock
</code>
</a>
commands.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Steps
<a class="headerlink leafygreen-ui-1kepx47" href="#steps" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="steps">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To take a self-managed backup of a sharded cluster, complete the following
steps:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"HowTo","steps":[{"@type":"HowToStep","text":"To find a good time to perform a backup, monitor your\napplication and database usage to find a time when chunk\nmigrations, resharding, and schema transformation\noperations are unlikely to occur.These steps can only produce a consistent backup if\nthey are followed exactly and no operations are in\nprogress when you begin.For more information, see Schedule Backup Window for a Self-Managed Sharded Cluster.","name":"Find a Backup Window"},{"@type":"HowToStep","text":"To prevent chunk migrations from disrupting the backup, connect to\nmongos and use the sh.stopBalancer() method to stop\nthe balancer:If a balancing round is in progress, the operation waits for balancing to\ncomplete.To verify that the balancer is stopped, use the\nsh.getBalancerState() method:","name":"Stop the Balancer"},{"@type":"HowToStep","text":"The sharded cluster must remain locked during the backup process to protect\nthe database from writes, which may cause inconsistencies in the backup.To lock a sharded cluster, connect to mongos and use the\ndb.fsyncLock() method:To confirm the lock, on mongos and the primary\nmongod of the config servers, run the following\naggregation pipeline and ensure that all the shards are\nlocked:","name":"Lock the Cluster"},{"@type":"HowToStep","text":"To back up the sharded cluster, use mongodump to connect to\nmongos and perform the backup:","name":"Take Backup"},{"@type":"HowToStep","text":"After the backup completes, you can unlock the cluster to allow writes\nto resume.To unlock the cluster, use the db.fsyncUnlock() method:To confirm the unlock, on mongos and the primary\nmongod of the config servers, run the following\naggregation pipeline and ensure that all shards are unlocked:","name":"Unlock the Cluster"},{"@type":"HowToStep","text":"To restart the balancer, use the sh.startBalancer() method:To confirm that the balancer is running, use the\nsh.getBalancerState() method:The command returns true when the balancer is running.","name":"Restart the Balancer"}],"name":"Steps","image":"https://webimages.mongodb.com/_com_assets/cms/kuyj2focmkbxv7gh3-stacked_default_slate_blue.svg?auto=format%252Ccompress"}
</script>
<div class="css-4nyere eccljxs0">
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
1
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Find a Backup Window
<a class="headerlink leafygreen-ui-1kepx47" href="#find-a-backup-window" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="find-a-backup-window">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To find a good time to perform a backup, monitor your
application and database usage to find a time when chunk
migrations, resharding, and schema transformation
operations are unlikely to occur.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
These steps can only produce a consistent backup if
they are followed exactly and no operations are in
progress when you begin.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For more information, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/schedule-backup-window-for-sharded-clusters/#std-label-sharded-schedule-backup">
Schedule Backup Window for a Self-Managed Sharded Cluster
<!-- -->
.
</a>
</p>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
2
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Stop the Balancer
<a class="headerlink leafygreen-ui-1kepx47" href="#stop-the-balancer" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="stop-the-balancer">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To prevent chunk migrations from disrupting the backup, connect to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-program-mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
and use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.stopBalancer/#mongodb-method-sh.stopBalancer">
<code class="leafygreen-ui-1l06pbn">
sh.stopBalancer()
</code>
</a>
method to stop
the balancer:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.stopBalancer()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">stopBalancer</span>(<!-- -->)</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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<p class="leafygreen-ui-1kp3ins">
If a balancing round is in progress, the operation waits for balancing to
complete.
</p>
<p class="leafygreen-ui-1kp3ins">
To verify that the balancer is stopped, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.getBalancerState/#mongodb-method-sh.getBalancerState">
<code class="leafygreen-ui-1l06pbn">
sh.getBalancerState()
</code>
</a>
method:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"use config\nwhile( sh.isBalancerRunning().mode != \"off\" ) {\n print( \"Waiting for Balancer to stop...\" );\n sleep( 1000 );\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">use config</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">while</span>( <!-- -->sh.<span class="lg-highlight-title lg-highlight-function">isBalancerRunning</span>(<!-- -->).<span class="lg-highlight-property">mode</span> <!-- -->!<!-- -->= <span class="lg-highlight-string">"off"</span> ) <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-function">print</span>( <span class="lg-highlight-string">"Waiting for Balancer to stop..."</span> )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-function">sleep</span>( <span class="lg-highlight-number">1000</span> )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
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</div>
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<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
3
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Lock the Cluster
<a class="headerlink leafygreen-ui-1kepx47" href="#lock-the-cluster" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="lock-the-cluster">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The sharded cluster must remain locked during the backup process to protect
the database from writes, which may cause inconsistencies in the backup.
</p>
<p class="leafygreen-ui-1kp3ins">
To lock a sharded cluster, connect to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-program-mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
and use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.fsyncLock/#mongodb-method-db.fsyncLock">
<code class="leafygreen-ui-1l06pbn">
db.fsyncLock()
</code>
</a>
method:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.getSiblingDB(\"admin\").fsyncLock()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">getSiblingDB</span>(<span class="lg-highlight-string">"admin"</span>).<span class="lg-highlight-title lg-highlight-function">fsyncLock</span>(<!-- -->)</td></tr></tbody></table></code></pre>
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</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To confirm the lock, on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-program-mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
and the primary
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-program-mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
of the config servers, run the following
aggregation pipeline and ensure that all the shards are
locked:
</p>
<div class="css-1f5771r">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.getSiblingDB(\"admin\").aggregate( [\n { $currentOp: { } },\n { $facet: {\n \"locked\": [\n { $match: { $and: [\n { fsyncLock: { $exists: true } }\n ] } }],\n \"unlocked\": [\n { $match: { fsyncLock: { $exists: false } } }\n ]\n } },\n { $project: {\n \"fsyncLocked\": { $gt: [ { $size: \"$locked\" }, 0 ] },\n \"fsyncUnlocked\": { $gt: [ { $size: \"$unlocked\" }, 0 ] }\n } }\n ] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">getSiblingDB</span>(<span class="lg-highlight-string">"admin"</span>).<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$currentOp</span>: <!-- -->{ <!-- -->} }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$facet</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"locked"</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$match</span>: <!-- -->{ <span class="lg-highlight-attr">$and</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">fsyncLock</span>: <!-- -->{ <span class="lg-highlight-attr">$exists</span>: <span class="lg-highlight-literal">true</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ] } }]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"unlocked"</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$match</span>: <!-- -->{ <span class="lg-highlight-attr">fsyncLock</span>: <!-- -->{ <span class="lg-highlight-attr">$exists</span>: <span class="lg-highlight-literal">false</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$project</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"fsyncLocked"</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">$size</span>: <span class="lg-highlight-string">"$locked"</span> }<!-- -->, <span class="lg-highlight-number">0</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"fsyncUnlocked"</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">$size</span>: <span class="lg-highlight-string">"$unlocked"</span> }<!-- -->, <span class="lg-highlight-number">0</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ] )</td></tr></tbody></table></code></pre>
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<svg alt="" aria-hidden="true" class="leafygreen-ui-hjnzs9" fill="none" height="16" role="presentation" viewbox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg">
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<pre class="leafygreen-ui-1qhgg7e" tabindex="-1"><code class="lg-highlight-hljs-dark json leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-punctuation">[</span> <span class="lg-highlight-punctuation">{</span> fsyncLocked<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-keyword">true</span> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span> <span class="lg-highlight-punctuation">{</span> fsyncUnlocked<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-keyword">false</span> <span class="lg-highlight-punctuation">}</span> <span class="lg-highlight-punctuation">]</span></td></tr></tbody></table></code></pre>
</div>
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</div>
</section>
</div>
</div>
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<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
4
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Take Backup
<a class="headerlink leafygreen-ui-1kepx47" href="#take-backup" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="take-backup">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To back up the sharded cluster, use
<code class="leafygreen-ui-1l06pbn">
mongodump
</code>
to connect to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-program-mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
and perform the backup:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"mongodump \\\n --host mongos.example.net \\\n --port 27017 \\\n --username user \\\n --password \"passwd\" \\\n --out /opt/backups/example-cluster-1","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongodump \</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> --host mongos.example.net \</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> --port 27017 \</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> --username user \</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> --password <span class="lg-highlight-string">"passwd"</span> \</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> --out <!-- -->/opt/backups/example-cluster-<!-- -->1</td></tr></tbody></table></code></pre>
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</section>
</div>
</div>
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5
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Unlock the Cluster
<a class="headerlink leafygreen-ui-1kepx47" href="#unlock-the-cluster" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="unlock-the-cluster">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
After the backup completes, you can unlock the cluster to allow writes
to resume.
</p>
<p class="leafygreen-ui-1kp3ins">
To unlock the cluster, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.fsyncUnlock/#mongodb-method-db.fsyncUnlock">
<code class="leafygreen-ui-1l06pbn">
db.fsyncUnlock()
</code>
</a>
method:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.getSibling(\"admin\").fsyncUnlock()","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.getSibling(<span class="lg-highlight-string">"admin"</span>).fsyncUnlock()</td></tr></tbody></table></code></pre>
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</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To confirm the unlock, on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-program-mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
and the primary
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-program-mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
of the config servers, run the following
aggregation pipeline and ensure that all shards are unlocked:
</p>
<div class="css-1f5771r">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.getSiblingDB(\"admin\").aggregate( [\n { $currentOp: { } },\n { $facet: {\n \"locked\": [\n { $match: { $and: [\n { fsyncLock: { $exists: true } }\n ] } }],\n \"unlocked\": [\n { $match: { fsyncLock: { $exists: false } } }\n ]\n } },\n { $project: {\n \"fsyncLocked\": { $gt: [ { $size: \"$locked\" }, 0 ] },\n \"fsyncUnlocked\": { $gt: [ { $size: \"$unlocked\" }, 0 ] }\n } }\n ] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">getSiblingDB</span>(<span class="lg-highlight-string">"admin"</span>).<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$currentOp</span>: <!-- -->{ <!-- -->} }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$facet</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"locked"</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$match</span>: <!-- -->{ <span class="lg-highlight-attr">$and</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">fsyncLock</span>: <!-- -->{ <span class="lg-highlight-attr">$exists</span>: <span class="lg-highlight-literal">true</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ] } }]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"unlocked"</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$match</span>: <!-- -->{ <span class="lg-highlight-attr">fsyncLock</span>: <!-- -->{ <span class="lg-highlight-attr">$exists</span>: <span class="lg-highlight-literal">false</span> } } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$project</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"fsyncLocked"</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">$size</span>: <span class="lg-highlight-string">"$locked"</span> }<!-- -->, <span class="lg-highlight-number">0</span> ] }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"fsyncUnlocked"</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <!-- -->[ <!-- -->{ <span class="lg-highlight-attr">$size</span>: <span class="lg-highlight-string">"$unlocked"</span> }<!-- -->, <span class="lg-highlight-number">0</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ] )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-v038xi">
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<div class="leafygreen-ui-16tr4y">
<svg alt="" aria-hidden="true" class="leafygreen-ui-hjnzs9" fill="none" height="16" role="presentation" viewbox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg">
<path clip-rule="evenodd" d="M14.364 10.778a1 1 0 0 0 0-1.414l-4.95-4.95-.707-.707a1 1 0 0 0-1.414 0l-.707.707-4.95 4.95a1 1 0 0 0 0 1.414l.707.707a1 1 0 0 0 1.414 0L8 7.243l4.243 4.242a1 1 0 0 0 1.414 0l.707-.707Z" fill="currentColor" fill-rule="evenodd">
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<div class="leafygreen-ui-1oteowz">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"[ { fsyncLocked: false }, { fsyncUnlocked: true } ]","programmingLanguage":"JSON"}
</script>
<div class="css-1sax7hu e11q6jfk0" style="--code-container-border:initial;--code-pre-border:none">
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<pre class="leafygreen-ui-1qhgg7e" tabindex="-1"><code class="lg-highlight-hljs-dark json leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-punctuation">[</span> <span class="lg-highlight-punctuation">{</span> fsyncLocked<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-keyword">false</span> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span> <span class="lg-highlight-punctuation">{</span> fsyncUnlocked<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-keyword">true</span> <span class="lg-highlight-punctuation">}</span> <span class="lg-highlight-punctuation">]</span></td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</section>
</div>
</div>
<div class="css-1nuklj8 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-19lsqsq e1ckbxcu2">
6
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</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Restart the Balancer
<a class="headerlink leafygreen-ui-1kepx47" href="#restart-the-balancer" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="restart-the-balancer">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To restart the balancer, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.startBalancer/#mongodb-method-sh.startBalancer">
<code class="leafygreen-ui-1l06pbn">
sh.startBalancer()
</code>
</a>
method:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.startBalancer()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">startBalancer</span>(<!-- -->)</td></tr></tbody></table></code></pre>
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<p class="leafygreen-ui-1kp3ins">
To confirm that the balancer is running, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.getBalancerState/#mongodb-method-sh.getBalancerState">
<code class="leafygreen-ui-1l06pbn">
sh.getBalancerState()
</code>
</a>
method:
</p>
<div class="css-1f5771r">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.getBalancerState()","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">getBalancerState</span>(<!-- -->)</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-v038xi">
</div>
<div class="leafygreen-ui-16tr4y">
<svg alt="" aria-hidden="true" class="leafygreen-ui-hjnzs9" fill="none" height="16" role="presentation" viewbox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg">
<path clip-rule="evenodd" d="M14.364 10.778a1 1 0 0 0 0-1.414l-4.95-4.95-.707-.707a1 1 0 0 0-1.414 0l-.707.707-4.95 4.95a1 1 0 0 0 0 1.414l.707.707a1 1 0 0 0 1.414 0L8 7.243l4.243 4.242a1 1 0 0 0 1.414 0l.707-.707Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
HIDE OUTPUT
</div>
</button>
</div>
<div class="leafygreen-ui-1oteowz">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"true","programmingLanguage":"JavaScript"}
</script>
<div class="css-1sax7hu e11q6jfk0" style="--code-container-border:initial;--code-pre-border:none">
<div class="leafygreen-ui-1fyvhqe">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1qhgg7e" tabindex="-1"><code class="lg-highlight-hljs-dark javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-literal">true</span></td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The command returns
<code class="leafygreen-ui-1l06pbn">
true
</code>
when the balancer is running.
</p>
</section>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Next Steps
<a class="headerlink leafygreen-ui-1kepx47" href="#next-steps" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="next-steps">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can restore a database from a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/database-tools/mongodump/#std-program-mongodump" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongodump
</code>
</span>
</a>
backup using
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/database-tools/mongorestore/#std-program-mongorestore" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongorestore
</code>
.
</span>
</a>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
To restore a sharded cluster, execute
<code class="leafygreen-ui-1l06pbn">
mongorestore
</code>
against
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-program-mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
To migrate to a replica set or standalone server, execute
<code class="leafygreen-ui-1l06pbn">
mongorestore
</code>
against
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-program-mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
.
</a>
</p>
</li>
</ul>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If you want to restore the database to a sharded cluster, you
<strong>
must
</strong>
set
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/database-tools/mongorestore/#std-option-mongorestore.--nsExclude" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
--nsExclude
</code>
</span>
</a>
to exclude the
<code class="leafygreen-ui-1l06pbn">
config
</code>
database:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"mongorestore --nsExclude='config.*' /data/backup","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongorestore --nsExclude='config.*' /data/backup</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For more information, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/backup-and-restore-tools/#std-label-manual-tutorial-backup-and-restore">
Back Up and Restore a Self-Managed Deployment with MongoDB Tools
<!-- -->
.
</a>
</p>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/security-oidc/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Self-Managed OpenID Connect Authentication
<a class="headerlink leafygreen-ui-1kepx47" href="#self-managed-openid-connect-authentication" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="self-managed-openid-connect-authentication">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#get-started" target="_self">
<span>
Get Started
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#details" target="_self">
<span>
Details
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#learn-more" target="_self">
<span>
Learn More
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
MongoDB Enterprise supports OpenID Connect authentication. OpenID
Connect is an authentication layer built on top of OAuth2. You can use OpenID
Connect to configure single sign-on between your MongoDB database and a third-party
identity provider.
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
To authenticate using OpenID Connect, enable the
<code class="leafygreen-ui-1l06pbn">
MONGODB-OIDC
</code>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/authentication/#std-label-authentication">
authentication
mechanism
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
OpenID Connect uses access tokens to provide identity information. The access
tokens are encoded as JSON Web Tokens (JWT). They contain information about
user identities and authorization rights.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
MongoDB currently supports the use of Microsoft Azure AD and Okta as third-party
identity providers.
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Get Started
<a class="headerlink leafygreen-ui-1kepx47" href="#get-started" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="get-started">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/configure-oidc/#std-label-configure-oidc">
Configure MongoDB with OpenID Connect
</a>
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Details
<a class="headerlink leafygreen-ui-1kepx47" href="#details" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="details">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The OpenID Connect authentication process with MongoDB is summarized below:
</p>
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Configure your MongoDB server with OpenID Connect. The configuration
includes information from your identity provider, such as client ID,
authorization endpoints, and token endpoints. For more details, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/configure-oidc/#std-label-configure-oidc">
Configure MongoDB with OpenID Connect
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The client application (for example
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
or
<!-- -->
MongoDB Compass
<!-- -->
)
contacts the identity provider's authorization endpoint. You are redirected
to your identity provider's login screen. Provide your credentials to complete
authentication.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The client application receives an access token from the identity provider.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The MongoDB server uses the access token provided from the client application to
finalize authentication. The access token contains information such as user
identity and authorization rights.
</p>
</li>
</ol>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Learn More
<a class="headerlink leafygreen-ui-1kepx47" href="#learn-more" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="learn-more">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://auth0.com/docs/authenticate/protocols/openid-connect-protocol" rel="noopener noreferrer">
<span>
OpenID Connect
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://learn.microsoft.com/en-us/azure/active-directory/manage-apps/add-application-portal-setup-oidc-sso" rel="noopener noreferrer">
<span>
Microsoft Azure AD
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://help.okta.com/oie/en-us/Content/Topics/Apps/apps-about-oidc.htm" rel="noopener noreferrer">
<span>
Okta as an Identity Provider
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/db.commandHelp/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
db.commandHelp()
<a class="headerlink leafygreen-ui-1kepx47" href="#db.commandhelp--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="db.commandhelp--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#description" target="_self">
<span>
Description
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Description
<a class="headerlink leafygreen-ui-1kepx47" href="#description" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="description">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
db.commandHelp(command)
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-db.commandHelp" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-db.commandHelp">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Displays help text for the specified
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-database-command">
database command
</a>
. See
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/">
Database Commands
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.commandHelp" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
db.commandHelp()
</code>
</span>
</a>
method has the following parameter:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Parameter
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
command
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The name of a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-database-command">
database command
<!-- -->
.
</a>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</dd>
</dl>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/command/updateUser/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
updateUser
<a class="headerlink leafygreen-ui-1kepx47" href="#updateuser" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="updateuser">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#command-fields" target="_self">
<span>
Command Fields
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#required-access" target="_self">
<span>
Required Access
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="dbcommand">
<dt>
<code class="leafygreen-ui-1l06pbn">
updateUser
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-dbcommand-dbcmd.updateUser" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-dbcommand-dbcmd.updateUser">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Updates the user's profile on the database on which you run the
command. An update to a field
<strong>
completely replaces
</strong>
the previous
field's values, including updates to the user's
<code class="leafygreen-ui-1l06pbn">
roles
</code>
and
<code class="leafygreen-ui-1l06pbn">
authenticationRestrictions
</code>
arrays.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
In
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#std-program-mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
, this command can also be run through the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.changeUserPassword/#mongodb-method-db.changeUserPassword">
<code class="leafygreen-ui-1l06pbn">
db.changeUserPassword()
</code>
</a>
helper method
<!-- -->
.
</p>
<p class="leafygreen-ui-1kp3ins">
Helper methods are convenient for
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#std-program-mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
users, but they may not
return the same level of information as database commands. In cases where
the convenience is not needed or the additional return fields are required,
use the database command.
</p>
</div>
</div>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
When you update the
<code class="leafygreen-ui-1l06pbn">
roles
</code>
array, you completely replace the
previous array's values. To add or remove roles without replacing all
the user's existing roles, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/grantRolesToUser/#mongodb-dbcommand-dbcmd.grantRolesToUser">
<code class="leafygreen-ui-1l06pbn">
grantRolesToUser
</code>
</a>
or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/revokeRolesFromUser/#mongodb-dbcommand-dbcmd.revokeRolesFromUser">
<code class="leafygreen-ui-1l06pbn">
revokeRolesFromUser
</code>
</a>
commands.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To update a user, you must specify the
<code class="leafygreen-ui-1l06pbn">
updateUser
</code>
field and at
least one other field, other than
<code class="leafygreen-ui-1l06pbn">
writeConcern
</code>
.
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This command is available in deployments hosted in the following environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This command is not supported in M0, M2, M5, and M10+ clusters.
For more information, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/" target="_self">
<span>
Unsupported Commands
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The command uses the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":" db.runCommand(\n {\n updateUser: \"<username>\",\n pwd: passwordPrompt(), // Or \"<cleartext>\"\n customData: { <any> },\n roles: [\n { role: \"<role>\", db: \"<database>\" } | \"<role>\",\n ...\n ],\n authenticationRestrictions: [\n {\n clientSource: [\"<ip>\" | \"<cidr>\", ...],\n serverAddress: [\"<ip>\", | \"<cidr>\", ...]\n },\n ...\n ],\n mechanisms: [ \"<scram-mechanism>\", ... ],\n digestPassword: <boolean>,\n writeConcern: { <write> },\n comment: <any>\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"> db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">updateUser</span>: <span class="lg-highlight-string">"<username>"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">pwd</span>: <span class="lg-highlight-title lg-highlight-function">passwordPrompt</span>(<!-- -->)<!-- -->, <span class="lg-highlight-comment">// Or "<cleartext password>"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">customData</span>: <!-- -->{ <!-- --><any information> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> roles: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> { role: "<role>", db: "<database>" } | "<role>",</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> authenticationRestrictions: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> clientSource: ["<IP>" | "<CIDR range>", ...],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> serverAddress: ["<IP>", | "<CIDR range>", ...]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> mechanisms: [ "<scram-mechanism>", ... ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> digestPassword: <boolean>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> writeConcern: { <write concern> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> comment: <any></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Command Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#command-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="command-fields">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The command takes the following fields:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
updateUser
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The name of the user to update.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
pwd
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. The user's password. The value can be either:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
the user's password in cleartext string, or
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/passwordPrompt/#mongodb-method-passwordPrompt">
<code class="leafygreen-ui-1l06pbn">
passwordPrompt()
</code>
</a>
to prompt for the user's password.
</p>
<p class="leafygreen-ui-1kp3ins">
You can use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/passwordPrompt/#mongodb-method-passwordPrompt">
<code class="leafygreen-ui-1l06pbn">
passwordPrompt()
</code>
</a>
method in conjunction with
various user authentication management methods and commands to prompt
for the password instead of specifying the password directly in the
method or command call. However, you can still specify the password
directly as you would with earlier versions of the
<code class="leafygreen-ui-1l06pbn">
mongo
</code>
shell.
</p>
</li>
</ul>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
customData
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Optional. Any arbitrary information.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
roles
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Optional. The roles granted to the user. An update to the
<code class="leafygreen-ui-1l06pbn">
roles
</code>
array
overrides the previous array's values.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
writeConcern
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. The level of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#std-label-write-concern">
write concern
</a>
for the
operation. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#std-label-wc-specs">
Write Concern Specification
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
authenticationRestrictions
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Optional. The authentication restrictions the server enforces upon the user.
Specifies a list of IP addresses and
<span class="leafygreen-ui-vm4wms" tabindex="0">
CIDR
</span>
ranges from which the
user is allowed to connect to the server or from which the server can
accept users.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
mechanisms
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. The specific SCRAM mechanism or mechanisms for the user credentials.
If
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.authenticationMechanisms">
<code class="leafygreen-ui-1l06pbn">
authenticationMechanisms
</code>
</a>
is specified, you can only
specify a subset of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.authenticationMechanisms">
<code class="leafygreen-ui-1l06pbn">
authenticationMechanisms
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
If updating the mechanisms field without the password, you can only
specify a subset of the user's current mechanisms, and only the
existing user credentials for the specified mechanism or mechanisms
are retained.
</p>
<p class="leafygreen-ui-1kp3ins">
If updating the password along with the mechanisms, new set of
credentials are stored for the user.
</p>
<p class="leafygreen-ui-1kp3ins">
Valid values are:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"SCRAM-SHA-1"
</code>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Uses the
<code class="leafygreen-ui-1l06pbn">
SHA-1
</code>
hashing function.
</p>
</li>
</ul>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
"SCRAM-SHA-256"
</code>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Uses the
<code class="leafygreen-ui-1l06pbn">
SHA-256
</code>
hashing function.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Requires featureCompatibilityVersion set to
<code class="leafygreen-ui-1l06pbn">
4.0
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Requires digestPassword to be
<code class="leafygreen-ui-1l06pbn">
true
</code>
.
</p>
</li>
</ul>
</li>
</ul>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
digestPassword
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. Indicates whether the server or the client digests the password.
</p>
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
true
</code>
(default), the server receives undigested password from the client and
digests the password.
</p>
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
false
</code>
, the client digests the password and passes the digested
password to the server. Not compatible with
<code class="leafygreen-ui-1l06pbn">
SCRAM-SHA-256
</code>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
comment
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
any
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. A user-provided comment to attach to this command. Once set, this
comment appears alongside records of this command in the following
locations:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/log-messages/#std-label-log-messages-ref">
mongod log messages
</a>
, in the
<code class="leafygreen-ui-1l06pbn">
attr.command.cursor.comment
</code>
field.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/database-profiler/#std-label-profiler">
Database profiler
</a>
output, in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/database-profiler/#mongodb-data-system.profile.command">
<code class="leafygreen-ui-1l06pbn">
command.comment
</code>
</a>
field.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/currentOp/#mongodb-dbcommand-dbcmd.currentOp">
<code class="leafygreen-ui-1l06pbn">
currentOp
</code>
</a>
output, in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/currentOp/#mongodb-data-currentOp.command">
<code class="leafygreen-ui-1l06pbn">
command.comment
</code>
</a>
field.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
A comment can be any valid
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-bson-types">
BSON type
</a>
(string, integer, object, array, etc).
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Roles
<a class="headerlink leafygreen-ui-1kepx47" href="#roles" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="roles">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
In the
<code class="leafygreen-ui-1l06pbn">
roles
</code>
field, you can specify both
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/built-in-roles/#std-label-built-in-roles">
built-in roles
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/security-user-defined-roles/#std-label-user-defined-roles">
user-defined
roles
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
To specify a role that exists in the same database where
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.updateUser" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
updateUser
</code>
</span>
</a>
runs, you can either specify the role with the name of
the role:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"\"readWrite\"","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-string">"readWrite"</span></td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Or you can specify the role with a document, as in:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ role: \"<role>\", db: \"<database>\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">role</span>: <span class="lg-highlight-string">"<role>"</span>, <span class="lg-highlight-attr">db</span>: <span class="lg-highlight-string">"<database>"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To specify a role that exists in a different database, specify the role
with a document.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Authentication Restrictions
<a class="headerlink leafygreen-ui-1kepx47" href="#authentication-restrictions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="authentication-restrictions">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
authenticationRestrictions
</code>
document can contain
<em>
only
</em>
the
following fields. The server throws an error if the
<code class="leafygreen-ui-1l06pbn">
authenticationRestrictions
</code>
document contains an unrecognized field:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:30%"/>
<col style="width:50%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field Name
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Value
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
clientSource
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Array of IP addresses and/or
<span class="leafygreen-ui-vm4wms" tabindex="0">
CIDR
</span>
ranges
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
If present, when authenticating a user, the server verifies
that the client's IP address is either in the given list or
belongs to a CIDR range in the list. If the client's IP address
is not present, the server does not authenticate the user.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
serverAddress
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Array of IP addresses and/or
<span class="leafygreen-ui-vm4wms" tabindex="0">
CIDR
</span>
ranges
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
A list of IP addresses or CIDR ranges to which the client can
connect. If present, the server will verify that the client's
connection was accepted via an IP address in the given list. If
the connection was accepted via an unrecognized IP address, the
server does not authenticate the user.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If a user inherits multiple roles with incompatible authentication
restrictions, that user becomes unusable.
</p>
<p class="leafygreen-ui-1kp3ins">
For example, if a user inherits one role in which the
<code class="leafygreen-ui-1l06pbn">
clientSource
</code>
field is
<code class="leafygreen-ui-1l06pbn">
["198.51.100.0"]
</code>
and another role in
which the
<code class="leafygreen-ui-1l06pbn">
clientSource
</code>
field is
<code class="leafygreen-ui-1l06pbn">
["203.0.113.0"]
</code>
the server is
unable to authenticate the user.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For more information on authentication in MongoDB, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/authentication/#std-label-authentication">
Authentication on Self-Managed Deployments
<!-- -->
.
</a>
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
By default,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.updateUser" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
updateUser
</code>
</span>
</a>
sends all specified data to the MongoDB
instance in cleartext, even if using
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/passwordPrompt/#mongodb-method-passwordPrompt">
<code class="leafygreen-ui-1l06pbn">
passwordPrompt()
</code>
</a>
. Use
TLS transport encryption to protect communications between clients
and the server, including the password sent by
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.updateUser" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
updateUser
</code>
</span>
</a>
. For
instructions on enabling TLS transport encryption, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/configure-ssl/">
Configure
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
and
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
for TLS/SSL
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
MongoDB does not store the password in cleartext. The password
is only vulnerable in transit between the client and the
server, and only if TLS transport encryption is not enabled.
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Required Access
<a class="headerlink leafygreen-ui-1kepx47" href="#required-access" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="required-access">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You must have access that includes the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-revokeRole">
<code class="leafygreen-ui-1l06pbn">
revokeRole
</code>
</a>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#std-label-security-user-actions">
action
</a>
on all databases in order to update a
user's
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-users-collection/#mongodb-data-admin.system.users.roles">
<code class="leafygreen-ui-1l06pbn">
roles
</code>
</a>
array.
</p>
<p class="leafygreen-ui-1kp3ins">
You must have the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-grantRole">
<code class="leafygreen-ui-1l06pbn">
grantRole
</code>
</a>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#std-label-security-user-actions">
action
</a>
on a role's database to add a role to a user.
</p>
<p class="leafygreen-ui-1kp3ins">
To change another user's
<code class="leafygreen-ui-1l06pbn">
pwd
</code>
or
<code class="leafygreen-ui-1l06pbn">
customData
</code>
field, you must have
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-changePassword">
<code class="leafygreen-ui-1l06pbn">
changePassword
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-changeCustomData">
<code class="leafygreen-ui-1l06pbn">
changeCustomData
</code>
</a>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#std-label-security-user-actions">
actions
</a>
respectively on that user's database.
</p>
<p class="leafygreen-ui-1kp3ins">
To modify your own password and custom data, you must have privileges
that grant
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-changeOwnPassword">
<code class="leafygreen-ui-1l06pbn">
changeOwnPassword
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-changeOwnCustomData">
<code class="leafygreen-ui-1l06pbn">
changeOwnCustomData
</code>
</a>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#std-label-security-user-actions">
actions
</a>
respectively on the user's database.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Given a user
<code class="leafygreen-ui-1l06pbn">
appClient01
</code>
in the
<code class="leafygreen-ui-1l06pbn">
products
</code>
database with the following
user info:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : \"products.appClient01\",\n \"userId\" : UUID(\"c5d88855-3f1e-46cb-9c8b-269bef957986\"),\n \"user\" : \"appClient01\",\n \"db\" : \"products\",\n \"customData\" : { \"empID\" : \"12345\", \"badge\" : \"9156\" },\n \"roles\" : [\n { \"role\" : \"readWrite\",\n \"db\" : \"products\"\n },\n { \"role\" : \"read\",\n \"db\" : \"inventory\"\n }\n ],\n \"mechanisms\" : [\n \"SCRAM-SHA-1\",\n \"SCRAM-SHA-256\"\n ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"products.appClient01"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"userId"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-function">UUID</span>(<span class="lg-highlight-string">"c5d88855-3f1e-46cb-9c8b-269bef957986"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"user"</span> <!-- -->: <span class="lg-highlight-string">"appClient01"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"db"</span> <!-- -->: <span class="lg-highlight-string">"products"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"customData"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"empID"</span> <!-- -->: <span class="lg-highlight-string">"12345"</span>, <span class="lg-highlight-string">"badge"</span> <!-- -->: <span class="lg-highlight-string">"9156"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"roles"</span> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"role"</span> <!-- -->: <span class="lg-highlight-string">"readWrite"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"db"</span> <!-- -->: <span class="lg-highlight-string">"products"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"role"</span> <!-- -->: <span class="lg-highlight-string">"read"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"db"</span> <!-- -->: <span class="lg-highlight-string">"inventory"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"mechanisms"</span> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"SCRAM-SHA-1"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"SCRAM-SHA-256"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.updateUser" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
updateUser
</code>
</span>
</a>
command
<strong>
completely
</strong>
replaces the
user's
<code class="leafygreen-ui-1l06pbn">
customData
</code>
and
<code class="leafygreen-ui-1l06pbn">
roles
</code>
data:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"use products\ndb.runCommand( {\n updateUser : \"appClient01\",\n customData : { employeeId : \"0x3039\" },\n roles : [ { role : \"read\", db : \"assets\" } ]\n} )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">use products</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->updateUser <!-- -->: <span class="lg-highlight-string">"appClient01"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->customData <!-- -->: <!-- -->{ <!-- -->employeeId <!-- -->: <span class="lg-highlight-string">"0x3039"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->roles <!-- -->: <!-- -->[ <!-- -->{ <!-- -->role <!-- -->: <span class="lg-highlight-string">"read"</span>, <!-- -->db <!-- -->: <span class="lg-highlight-string">"assets"</span> } ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The user
<code class="leafygreen-ui-1l06pbn">
appClient01
</code>
in the
<code class="leafygreen-ui-1l06pbn">
products
</code>
database now has the following
user information:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\" : \"products.appClient01\",\n \"userId\" : UUID(\"c5d88855-3f1e-46cb-9c8b-269bef957986\"),\n \"user\" : \"appClient01\",\n \"db\" : \"products\",\n \"customData\" : { \"employeeId\" : \"0x3039\" },\n \"roles\" : [\n { \"role\" : \"read\",\n \"db\" : \"assets\"\n }\n ],\n \"mechanisms\" : [\n \"SCRAM-SHA-1\",\n \"SCRAM-SHA-256\"\n ]\n\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-string">"products.appClient01"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"userId"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-function">UUID</span>(<span class="lg-highlight-string">"c5d88855-3f1e-46cb-9c8b-269bef957986"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"user"</span> <!-- -->: <span class="lg-highlight-string">"appClient01"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"db"</span> <!-- -->: <span class="lg-highlight-string">"products"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"customData"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"employeeId"</span> <!-- -->: <span class="lg-highlight-string">"0x3039"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"roles"</span> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"role"</span> <!-- -->: <span class="lg-highlight-string">"read"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"db"</span> <!-- -->: <span class="lg-highlight-string">"assets"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"mechanisms"</span> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"SCRAM-SHA-1"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"SCRAM-SHA-256"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/Bulk.find.arrayFilters/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Bulk.find.arrayFilters()
<a class="headerlink leafygreen-ui-1kepx47" href="#bulk.find.arrayfilters--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="bulk.find.arrayfilters--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#description" target="_self">
<span>
Description
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Description
<a class="headerlink leafygreen-ui-1kepx47" href="#description" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="description">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
Bulk.find.arrayFilters(<array of filter documents>)
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-Bulk.find.arrayFilters" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-Bulk.find.arrayFilters">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Determines which array elements to modify for an update operation on
an array field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"Bulk.find(<query>).arrayFilters([ <filter1>, ... ]).updateOne(<update>);\nBulk.find(<query>).arrayFilters([ <filter1>, ... ]).update(<update>);","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">Bulk</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(<<!-- -->query<!-- -->><!-- -->).<span class="lg-highlight-title lg-highlight-function">arrayFilters</span>(<!-- -->[ <<!-- -->filter1<!-- -->><!-- -->,<!-- --> <!-- -->...<!-- --> ]).<span class="lg-highlight-title lg-highlight-function">updateOne</span>(<<!-- -->update<!-- -->><!-- -->)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">Bulk</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(<<!-- -->query<!-- -->><!-- -->).<span class="lg-highlight-title lg-highlight-function">arrayFilters</span>(<!-- -->[ <<!-- -->filter1<!-- -->><!-- -->,<!-- --> <!-- -->...<!-- --> ]).<span class="lg-highlight-title lg-highlight-function">update</span>(<<!-- -->update<!-- -->><!-- -->)<!-- -->;</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
In the update document, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/positional-filtered/#mongodb-update-up.---identifier--">
<code class="leafygreen-ui-1l06pbn">
$[<identifier>]
</code>
</a>
filtered
positional operator to define an identifier, which you then reference
in the array filter documents. You cannot have an array filter
document for an identifier if the identifier is not included in the
update document.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
<identifier>
</code>
must begin with a lowercase letter and
contain only alphanumeric characters.
</p>
<p class="leafygreen-ui-1kp3ins">
You can include the same identifier multiple times in the update
document; however, for each distinct identifier (
<code class="leafygreen-ui-1l06pbn">
$[identifier]
</code>
)
in the update document, you must specify
<strong>
exactly one
</strong>
corresponding array filter document. That is, you cannot specify
multiple array filter documents for the same identifier. For
example, if the update statement includes the identifier
<code class="leafygreen-ui-1l06pbn">
x
</code>
(possibly multiple times), you cannot specify the following for
<code class="leafygreen-ui-1l06pbn">
arrayFilters
</code>
that includes 2 separate filter documents for
<code class="leafygreen-ui-1l06pbn">
x
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"// INVALID\n\n[\n { \"x.a\": { $gt: 85 } },\n { \"x.b\": { $gt: 80 } }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// INVALID</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"x.a"</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">85</span> } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"x.b"</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">80</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
However, you can specify compound conditions on the same identifier
in a single filter document, such as in the following examples:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"// Example 1\n[\n { $or: [{\"x.a\": {$gt: 85}}, {\"x.b\": {$gt: 80}}] }\n]\n// Example 2\n[\n { $and: [{\"x.a\": {$gt: 85}}, {\"x.b\": {$gt: 80}}] }\n]\n// Example 3\n[\n { \"x.a\": { $gt: 85 }, \"x.b\": { $gt: 80 } }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// Example 1</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$or</span>: <!-- -->[<!-- -->{<span class="lg-highlight-string">"x.a"</span>: <!-- -->{<span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">85</span>}}<!-- -->, <!-- -->{<span class="lg-highlight-string">"x.b"</span>: <!-- -->{<span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">80</span>}}] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// Example 2</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$and</span>: <!-- -->[<!-- -->{<span class="lg-highlight-string">"x.a"</span>: <!-- -->{<span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">85</span>}}<!-- -->, <!-- -->{<span class="lg-highlight-string">"x.b"</span>: <!-- -->{<span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">80</span>}}] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// Example 3</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"x.a"</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">85</span> }<!-- -->, <span class="lg-highlight-string">"x.b"</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">80</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Append to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk.find/#mongodb-method-Bulk.find">
<code class="leafygreen-ui-1l06pbn">
Bulk.find()
</code>
</a>
method to specify the array filters
for the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk.find.updateOne/#mongodb-method-Bulk.find.updateOne">
<code class="leafygreen-ui-1l06pbn">
updateOne()
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk.find.update/#mongodb-method-Bulk.find.update">
<code class="leafygreen-ui-1l06pbn">
update()
</code>
</a>
operations.
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"var bulk = db.coll.initializeUnorderedBulkOp();\nbulk.find({}).arrayFilters( [ { \"elem.grade\": { $gt: 85 } } ] ).updateOne( { $set: { \"grades.$[elem].mean\" : 70 } } );\nbulk.execute();","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> bulk <!-- -->= <!-- -->db.<span class="lg-highlight-property">coll</span>.<span class="lg-highlight-title lg-highlight-function">initializeUnorderedBulkOp</span>(<!-- -->)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bulk.<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{<!-- -->}).<span class="lg-highlight-title lg-highlight-function">arrayFilters</span>( <!-- -->[ <!-- -->{ <span class="lg-highlight-string">"elem.grade"</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">85</span> } } ] ).<span class="lg-highlight-title lg-highlight-function">updateOne</span>( <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-string">"grades.$[elem].mean"</span> <!-- -->: <span class="lg-highlight-number">70</span> } } )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">bulk.<span class="lg-highlight-title lg-highlight-function">execute</span>(<!-- -->)<!-- -->;</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.initializeUnorderedBulkOp/#mongodb-method-db.collection.initializeUnorderedBulkOp">
<code class="leafygreen-ui-1l06pbn">
db.collection.initializeUnorderedBulkOp()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.initializeOrderedBulkOp/#mongodb-method-db.collection.initializeOrderedBulkOp">
<code class="leafygreen-ui-1l06pbn">
db.collection.initializeOrderedBulkOp()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk.find.update/#mongodb-method-Bulk.find.update">
<code class="leafygreen-ui-1l06pbn">
Bulk.find.update()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk.find.updateOne/#mongodb-method-Bulk.find.updateOne">
<code class="leafygreen-ui-1l06pbn">
Bulk.find.updateOne()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk.execute/#mongodb-method-Bulk.execute">
<code class="leafygreen-ui-1l06pbn">
Bulk.execute()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Bulk/#std-label-bulk-methods">
All Bulk Methods
</a>
</p>
</li>
</ul>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/tutorial/list-users/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
List Users in Self-Managed Deployments
<a class="headerlink leafygreen-ui-1kepx47" href="#list-users-in-self-managed-deployments" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="list-users-in-self-managed-deployments">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#before-you-begin" target="_self">
<span>
Before You Begin
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#steps" target="_self">
<span>
Steps
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
To list all users, use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
to query the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-users-collection/#std-label-system-users">
system.users
</a>
collection:
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Before You Begin
<a class="headerlink leafygreen-ui-1kepx47" href="#before-you-begin" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="before-you-begin">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 8.0, you can use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/built-in-roles/#mongodb-authrole-directShardOperations">
<code class="leafygreen-ui-1l06pbn">
directShardOperations
</code>
</a>
role to perform maintenance operations
that require you to execute commands directly against a shard.
</p>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Running commands using the
<code class="leafygreen-ui-1l06pbn">
directShardOperations
</code>
role can cause
your cluster to stop working correctly and may cause data corruption.
Only use the
<code class="leafygreen-ui-1l06pbn">
directShardOperations
</code>
role for maintenance purposes
or under the guidance of MongoDB support. Once you are done
performing maintenance operations, stop using the
<code class="leafygreen-ui-1l06pbn">
directShardOperations
</code>
role.
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Steps
<a class="headerlink leafygreen-ui-1kepx47" href="#steps" title="Permalink to this heading">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="steps">
</div>
</a>
</h2>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"use admin\ndb.system.users.find()","programmingLanguage":"Shell"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">use admin</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.system.users.find()</td></tr></tbody></table></code></pre>
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</div>
</div>
</div>
</div>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Do not modify the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-users-collection/">
system.users
</a>
collection directly. To manage
users, use the designated
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/#std-label-user-management-commands">
user management commands
<!-- -->
.
</a>
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To list all users of a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/sharding/#std-label-sharding-sharded-cluster">
sharded cluster
</a>
that were
created through a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
, connect to a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
and run the preceding command. MongoDB stores
users that are created through a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
in the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-config-server">
config servers
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
To list all
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/security-users/#std-label-shard-local-users">
shard local users
</a>
, connect to the respective shard directly and run
the preceding command. MongoDB stores
<em>
shard local
</em>
users in the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database of the shard itself. These
<em>
shard local
</em>
users are
independent from the users added to the sharded cluster through a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
.
<em>
Shard local
</em>
users are local to the shard and
are inaccessible to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
.
</a>
</p>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/aggregation/changeStream/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$changeStream (aggregation)
<a class="headerlink leafygreen-ui-1kepx47" href="#-changestream--aggregation-" title="Permalink to this heading">
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</path>
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</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-changestream--aggregation-">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#stable-api-support" target="_self">
<span>
Stable API Support
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="pipeline">
<dt>
<code class="leafygreen-ui-1l06pbn">
$changeStream
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-pipeline-pipe.-changeStream" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-pipeline-pipe.-changeStream">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Returns a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/changeStreams/#std-label-changeStreams">
Change Stream
</a>
cursor on a collection, a database,
or an entire cluster. Must be used as the first stage in an aggregation pipeline.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-pipeline-pipe.-changeStream" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$changeStream
</code>
</span>
</a>
stage has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n $changeStream: {\n allChangesForCluster: <boolean>,\n fullDocument: <string>,\n fullDocumentBeforeChange: <string>,\n resumeAfter: <document>\n showExpandedEvents: <boolean>,\n startAfter: <document>\n startAtOperationTime: <timestamp>\n }\n}"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> $changeStream: {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> allChangesForCluster: <boolean>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> fullDocument: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> fullDocumentBeforeChange: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> resumeAfter: <document></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> showExpandedEvents: <boolean>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> startAfter: <document></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> startAtOperationTime: <timestamp></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
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</div>
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</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Parameter
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
allChangesForCluster
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Optional: Sets whether the change stream should include all changes
in the cluster. May only be opened on the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
fullDocument
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional: Specifies whether change notifications include a copy of the
full document when modified by
<code class="leafygreen-ui-1l06pbn">
update
</code>
operations.
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
default
</code>
: Change notifications do not include the full document
for
<code class="leafygreen-ui-1l06pbn">
update
</code>
operations.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
required
</code>
: Change notifications includes a copy of the modified
document as it appeared immediately after the change. If the
document cannot be found, the change stream throws an error.
</p>
<p class="leafygreen-ui-1kp3ins">
To use this option, you must first use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collMod/#mongodb-dbcommand-dbcmd.collMod">
<code class="leafygreen-ui-1l06pbn">
collMod
</code>
</a>
command to enable the
<code class="leafygreen-ui-1l06pbn">
changeStreamPreAndPostImages
</code>
option.
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0
</em>
.
</p>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
updateLookup
</code>
: Change notifications includes a copy of the
document modified by the change. This document is the current
majority-committed document or
<code class="leafygreen-ui-1l06pbn">
null
</code>
if it no longer exists.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
whenAvailable
</code>
: Change notification includes a copy of the
modified document as it appeared immediately after the change or
<code class="leafygreen-ui-1l06pbn">
null
</code>
if the document is unavailable.
</p>
<p class="leafygreen-ui-1kp3ins">
To use this option, you must first use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collMod/#mongodb-dbcommand-dbcmd.collMod">
<code class="leafygreen-ui-1l06pbn">
collMod
</code>
</a>
command to enable the
<code class="leafygreen-ui-1l06pbn">
changeStreamPreAndPostImages
</code>
option.
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0
</em>
.
</p>
</div>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
In the case of partial updates, the change notification also
provides a description of the change.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
fullDocumentBeforeChange
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Include the full document from before the change.
This field accepts the following values:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
off
</code>
: Disables inclusion of the document from before the change.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
whenAvailable
</code>
: Includes document from before the change.
The query does not fail if the unmodified document is not available.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
required
</code>
: Includes document from before the change. The query
fails if the unmodified document is not available.
</p>
</li>
</ul>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
resumeAfter
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. Specifies a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/changeStreams/#std-label-change-stream-resume">
resume token
</a>
as the
logical starting point for the change stream. Cannot be used to resume
the change stream after an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/change-events/invalidate/#mongodb-data-invalidate">
<code class="leafygreen-ui-1l06pbn">
invalidate
</code>
</a>
event.
</p>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
resumeAfter
</code>
is mutually exclusive with
<code class="leafygreen-ui-1l06pbn">
startAfter
</code>
and
<code class="leafygreen-ui-1l06pbn">
startAtOperationTime
</code>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
showExpandedEvents
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Specifies whether to include additional change events, such as
such as DDL and index operations.
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
6.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
startAfter
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. Specifies a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/changeStreams/#std-label-change-stream-resume">
resume token
</a>
as the
logical starting point for the change stream. Unlike
<code class="leafygreen-ui-1l06pbn">
resumeAfter
</code>
,
<code class="leafygreen-ui-1l06pbn">
startAfter
</code>
can resume notifications after an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/change-events/invalidate/#mongodb-data-invalidate">
<code class="leafygreen-ui-1l06pbn">
invalidate
</code>
</a>
event by creating a new change stream.
</p>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
startAfter
</code>
is mutually exclusive with
<code class="leafygreen-ui-1l06pbn">
resumeAfter
</code>
and
<code class="leafygreen-ui-1l06pbn">
startAtOperationTime
</code>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
startAtOperationTime
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Specifies a time as the logical starting point for the change stream.
Cannot be used with
<code class="leafygreen-ui-1l06pbn">
resumeAfter
</code>
or
<code class="leafygreen-ui-1l06pbn">
startAfter
</code>
fields.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Stable API Support
<a class="headerlink leafygreen-ui-1kepx47" href="#stable-api-support" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="stable-api-support">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Change streams are included in
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/stable-api/#std-label-stable-api">
Stable API
</a>
V1.
However, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/change-events/#std-label-change-streams-expanded-events">
showExpandedEvents
</a>
option is not included in Stable API V1.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To create a change stream cursor using the aggregation stage, run
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/aggregate/#mongodb-dbcommand-dbcmd.aggregate">
<code class="leafygreen-ui-1l06pbn">
aggregate
</code>
</a>
command.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"var cur = db.names.aggregate( [\n { $changeStream: {} }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">var</span> cur <!-- -->= <!-- -->db.<span class="lg-highlight-property">names</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">$changeStream</span>: <!-- -->{<!-- -->} }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To open the cursor, run
<code class="leafygreen-ui-1l06pbn">
cur
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
When the change stream detects a change, the
<code class="leafygreen-ui-1l06pbn">
next()
</code>
method returns
a change event notification. For example, after running
<code class="leafygreen-ui-1l06pbn">
cur.next()
</code>
,
MongoDB returns a document similar to the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"_id\": {\n _data: \"8262E2EE54000000022B022C0100296E5A100448E5E3DD01364019AE8FE8C6859527E046645F6964006462E2EE54C8756C0D5CF6F0720004\"\n },\n \"operationType\": \"insert\",\n \"clusterTime\": Timestamp({ t: 1659039316, i: 2 }),\n \"wallTime\": ISODate(\"2022-07-28T20:15:16.148Z\"),\n \"fullDocument\": {\n \"_id\": ObjectId(\"62e2ee54c8756c0d5cf6f072\"),\n \"name\": \"Walker Percy\"\n },\n \"ns\": {\n \"db\": \"test\",\n \"coll\": \"names\"\n },\n \"documentKey\": { _id: ObjectId(\"62e2ee54c8756c0d5cf6f072\") }\n}","programmingLanguage":"JSON"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light json leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"_id"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> _data<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"8262E2EE54000000022B022C0100296E5A100448E5E3DD01364019AE8FE8C6859527E046645F6964006462E2EE54C8756C0D5CF6F0720004"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"operationType"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"insert"</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"clusterTime"</span><span class="lg-highlight-punctuation">:</span> Timestamp(<span class="lg-highlight-punctuation">{</span> t<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-number">1659039316</span><span class="lg-highlight-punctuation">,</span> i<span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-number">2</span> <span class="lg-highlight-punctuation">}</span>)<span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"wallTime"</span><span class="lg-highlight-punctuation">:</span> ISODate(<span class="lg-highlight-string">"2022-07-28T20:15:16.148Z"</span>)<span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"fullDocument"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"_id"</span><span class="lg-highlight-punctuation">:</span> ObjectId(<span class="lg-highlight-string">"62e2ee54c8756c0d5cf6f072"</span>)<span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"name"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"Walker Percy"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"ns"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"db"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"test"</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"coll"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-string">"names"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"documentKey"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span> _id<span class="lg-highlight-punctuation">:</span> ObjectId(<span class="lg-highlight-string">"62e2ee54c8756c0d5cf6f072"</span>) <span class="lg-highlight-punctuation">}</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-punctuation">}</span></td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For more information on change stream notifications, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/change-events/#std-label-change-events">
Change Events
<!-- -->
.
</a>
</p>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/ObjectId.getTimestamp/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
ObjectId.getTimestamp()
<a class="headerlink leafygreen-ui-1kepx47" href="#objectid.gettimestamp--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="objectid.gettimestamp--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
ObjectId.getTimestamp()
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-ObjectId.getTimestamp" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-ObjectId.getTimestamp">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Returns the timestamp portion of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/ObjectId/#mongodb-method-ObjectId">
<code class="leafygreen-ui-1l06pbn">
ObjectId()
</code>
</a>
as a Date.
</p>
</dd>
</dl>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following example calls the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-ObjectId.getTimestamp" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
getTimestamp()
</code>
</span>
</a>
method on an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/ObjectId/#mongodb-method-ObjectId">
<code class="leafygreen-ui-1l06pbn">
ObjectId()
</code>
:
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"ObjectId(\"507c7f79bcf86cd7994f6c0e\").getTimestamp()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"507c7f79bcf86cd7994f6c0e"</span>).<span class="lg-highlight-title lg-highlight-function">getTimestamp</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
This will return the following output:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"ISODate(\"2012-10-15T21:26:17Z\")","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2012-10-15T21:26:17Z"</span>)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-objectid">
ObjectId BSON Type
</a>
</p>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/cursor.collation/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
cursor.collation()
<a class="headerlink leafygreen-ui-1kepx47" href="#cursor.collation--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="cursor.collation--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
cursor.collation(<collation document>)
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-cursor.collation" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-cursor.collation">
</div>
</a>
</dt>
<dd>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
mongosh Method
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This page documents a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
method. This is
<em>
not
</em>
the documentation for a language-specific driver, such as Node.js.
</p>
<p class="leafygreen-ui-1kp3ins">
For MongoDB API drivers, refer to the language-specific
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
MongoDB driver documentation
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Specifies the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/collation/#std-label-collation">
collation
</a>
for the cursor returned
by the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
db.collection.find()
</code>
</a>
. To use, append to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
db.collection.find()
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.collation" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
cursor.collation()
</code>
</span>
</a>
accepts the following collation
document:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n locale: <string>,\n caseLevel: <boolean>,\n caseFirst: <string>,\n strength: <int>,\n numericOrdering: <boolean>,\n alternate: <string>,\n maxVariable: <string>,\n backwards: <boolean>\n}"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> locale: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> caseLevel: <boolean>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> caseFirst: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> strength: <int>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> numericOrdering: <boolean>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> alternate: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> maxVariable: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> backwards: <boolean></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
When specifying collation, the
<code class="leafygreen-ui-1l06pbn">
locale
</code>
field is mandatory; all
other collation fields are optional. For descriptions of the fields,
see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/collation/#std-label-collation-document-fields">
Collation Document
<!-- -->
.
</a>
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
locale
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The ICU locale. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/collation-locales-defaults/#std-label-collation-languages-locales">
Supported Languages and Locales
</a>
for a
list of supported locales.
</p>
<p class="leafygreen-ui-1kp3ins">
To specify simple binary comparison, specify
<code class="leafygreen-ui-1l06pbn">
locale
</code>
value of
<code class="leafygreen-ui-1l06pbn">
"simple"
</code>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
strength
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. The level of comparison to perform.
Corresponds to
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://unicode-org.github.io/icu/userguide/collation/concepts.html#comparison-levels" rel="noopener noreferrer">
<span>
ICU Comparison Levels
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
.
Possible values are:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:90%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Value
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
1
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Primary level of comparison. Collation performs
comparisons of the base characters only, ignoring other
differences such as diacritics and case.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
2
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Secondary level of comparison. Collation performs comparisons
up to secondary differences, such as diacritics.
That is, collation performs comparisons of base characters
(primary differences) and diacritics (secondary differences).
Differences between base characters takes precedence over
secondary differences.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
3
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Tertiary level of comparison. Collation performs comparisons
up to tertiary differences, such as case and letter variants.
That is, collation performs comparisons of base characters
(primary differences), diacritics (secondary differences), and
case and variants (tertiary differences). Differences between
base characters takes precedence over secondary differences,
which takes precedence over tertiary differences.
</p>
<p class="leafygreen-ui-1kp3ins">
This is the default level.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
4
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Quaternary Level. Limited for specific use case to
consider punctuation when levels 1-3 ignore punctuation
or for processing Japanese text.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
5
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Identical Level. Limited for specific use case of tie
breaker.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://unicode-org.github.io/icu/userguide/collation/concepts.html#comparison-levels" rel="noopener noreferrer">
<span>
ICU Collation: Comparison Levels
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
for details.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
caseLevel
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. Flag that determines whether to include case comparison at
<code class="leafygreen-ui-1l06pbn">
strength
</code>
level
<code class="leafygreen-ui-1l06pbn">
1
</code>
or
<code class="leafygreen-ui-1l06pbn">
2
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
true
</code>
, include case comparison; i.e.
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
When used with
<code class="leafygreen-ui-1l06pbn">
strength:1
</code>
, collation compares base characters
and case.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
When used with
<code class="leafygreen-ui-1l06pbn">
strength:2
</code>
, collation compares base characters,
diacritics (and possible other secondary differences) and case.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
false
</code>
, do not include case comparison at level
<code class="leafygreen-ui-1l06pbn">
1
</code>
or
<code class="leafygreen-ui-1l06pbn">
2
</code>
. The default is
<code class="leafygreen-ui-1l06pbn">
false
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
For more information, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://unicode-org.github.io/icu/userguide/collation/concepts.html#caselevel" rel="noopener noreferrer">
<span>
ICU Collation: Case Level
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
caseFirst
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. A field that determines sort order of case differences during
tertiary level comparisons.
</p>
<p class="leafygreen-ui-1kp3ins">
Possible values are:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:90%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Value
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"upper"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Uppercase sorts before lowercase.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"lower"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Lowercase sorts before uppercase.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
"off"
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Default value. Similar to
<code class="leafygreen-ui-1l06pbn">
"lower"
</code>
with slight
differences. See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://unicode-org.github.io/icu/userguide/strings/properties.html#customization" rel="noopener noreferrer">
<span>
https://unicode-org.github.io/icu/userguide/strings/properties.html#customization
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
for details of differences.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
numericOrdering
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. Flag that determines whether to compare numeric strings as numbers
or as strings.
</p>
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
true
</code>
, compare as numbers; i.e.
<code class="leafygreen-ui-1l06pbn">
"10"
</code>
is greater than
<code class="leafygreen-ui-1l06pbn">
"2"
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
false
</code>
, compare as strings; i.e.
<code class="leafygreen-ui-1l06pbn">
"10"
</code>
is less than
<code class="leafygreen-ui-1l06pbn">
"2"
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
Default is
<code class="leafygreen-ui-1l06pbn">
false
</code>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
alternate
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. Field that determines whether collation should consider whitespace
and punctuation as base characters for purposes of comparison.
</p>
<p class="leafygreen-ui-1kp3ins">
Possible values are:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:90%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Value
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
"non-ignorable"
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Whitespace and punctuation are considered base characters.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
"shifted"
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Whitespace and punctuation are not considered base characters
and are only distinguished at strength levels greater than 3.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://unicode-org.github.io/icu/userguide/collation/concepts.html#comparison-levels" rel="noopener noreferrer">
<span>
ICU Collation: Comparison Levels
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
for more information.
</p>
<p class="leafygreen-ui-1kp3ins">
Default is
<code class="leafygreen-ui-1l06pbn">
"non-ignorable"
</code>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
maxVariable
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. Field that determines up to which characters are considered
ignorable when
<code class="leafygreen-ui-1l06pbn">
alternate: "shifted"
</code>
. Has no effect if
<code class="leafygreen-ui-1l06pbn">
alternate: "non-ignorable"
</code>
</p>
<p class="leafygreen-ui-1kp3ins">
Possible values are:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:90%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Value
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
"punct"
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Both whitespaces and punctuation are "ignorable", i.e. not
considered base characters.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
"space"
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Whitespace are "ignorable", i.e. not considered base
characters.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
backwards
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. Flag that determines whether strings with diacritics sort from back
of the string, such as with some French dictionary ordering.
</p>
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
true
</code>
, compare from back to front.
</p>
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
false
</code>
, compare from front to back.
</p>
<p class="leafygreen-ui-1kp3ins">
The default value is
<code class="leafygreen-ui-1l06pbn">
false
</code>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
normalization
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. Flag that determines whether to check if text require normalization
and to perform normalization. Generally, majority of text does not
require this normalization processing.
</p>
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
true
</code>
, check if fully normalized and perform normalization to
compare text.
</p>
<p class="leafygreen-ui-1kp3ins">
If
<code class="leafygreen-ui-1l06pbn">
false
</code>
, does not check.
</p>
<p class="leafygreen-ui-1kp3ins">
The default value is
<code class="leafygreen-ui-1l06pbn">
false
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://unicode-org.github.io/icu/userguide/collation/concepts.html#normalization" rel="noopener noreferrer">
<span>
https://unicode-org.github.io/icu/userguide/collation/concepts.html#normalization
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
for details.
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Consider a collection
<code class="leafygreen-ui-1l06pbn">
foo
</code>
with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"x\" : \"a\" }\n{ \"_id\" : 2, \"x\" : \"A\" }\n{ \"_id\" : 3, \"x\" : \"á\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"x"</span> <!-- -->: <span class="lg-highlight-string">"a"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"x"</span> <!-- -->: <span class="lg-highlight-string">"A"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"x"</span> <!-- -->: <span class="lg-highlight-string">"á"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following operation specifies a query filter of
<code class="leafygreen-ui-1l06pbn">
x: "a"
</code>
. The
operation also includes a collation option with
<code class="leafygreen-ui-1l06pbn">
locale: "en_US"
</code>
(US English locale) and
<code class="leafygreen-ui-1l06pbn">
strength: 1
</code>
(compare base characters
only; i.e. ignore case and diacritics):
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.foo.find( { x: \"a\" } ).collation( { locale: \"en_US\", strength: 1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">foo</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">x</span>: <span class="lg-highlight-string">"a"</span> } ).<span class="lg-highlight-title lg-highlight-function">collation</span>( <!-- -->{ <span class="lg-highlight-attr">locale</span>: <span class="lg-highlight-string">"en_US"</span>, <span class="lg-highlight-attr">strength</span>: <span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"x\" : \"a\" }\n{ \"_id\" : 2, \"x\" : \"A\" }\n{ \"_id\" : 3, \"x\" : \"á\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"x"</span> <!-- -->: <span class="lg-highlight-string">"a"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"x"</span> <!-- -->: <span class="lg-highlight-string">"A"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"x"</span> <!-- -->: <span class="lg-highlight-string">"á"</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
If you do not specify the collation, i.e.
<code class="leafygreen-ui-1l06pbn">
db.collection.find( { x:
"a" } )
</code>
, the query would only match the following document:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.foo.find( { x: \"a\" } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">foo</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">x</span>: <span class="lg-highlight-string">"a"</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
You can chain other cursor methods, such as
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.sort/#mongodb-method-cursor.sort">
<code class="leafygreen-ui-1l06pbn">
cursor.sort()
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.count/#mongodb-method-cursor.count">
<code class="leafygreen-ui-1l06pbn">
cursor.count()
</code>
</a>
, to
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.collation" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
cursor.collation()
</code>
:
</span>
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.collection.find({...}).collation({...}).sort({...});\ndb.collection.find({...}).collation({...}).count();","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">collection</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{<!-- -->...<!-- -->}).<span class="lg-highlight-title lg-highlight-function">collation</span>(<!-- -->{<!-- -->...<!-- -->}).<span class="lg-highlight-title lg-highlight-function">sort</span>(<!-- -->{<!-- -->...<!-- -->})<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">collection</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->{<!-- -->...<!-- -->}).<span class="lg-highlight-title lg-highlight-function">collation</span>(<!-- -->{<!-- -->...<!-- -->}).<span class="lg-highlight-title lg-highlight-function">count</span>(<!-- -->)<!-- -->;</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
You cannot specify multiple collations for an operation. For
example, you cannot specify different collations per field, or if
performing a find with a sort, you cannot use one collation for the
find and another for the sort.
</p>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/data-models/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Data Model Reference
<a class="headerlink leafygreen-ui-1kepx47" href="#data-model-reference" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="data-model-reference">
</div>
</a>
</h1>
<dl>
<dt>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/database-references/">
Database References
</a>
</dt>
<dd class="css-1ufxuu7">
Discusses manual references and DBRefs, which MongoDB can use to
represent relationships between documents.
</dd>
</dl>
</section>
|
https://www.mongodb.com/docs/manual/reference/command/whatsmyuri/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
whatsmyuri
<a class="headerlink leafygreen-ui-1kepx47" href="#whatsmyuri" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="whatsmyuri">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
</ul>
</div>
<dl class="dbcommand">
<dt>
<code class="leafygreen-ui-1l06pbn">
whatsmyuri
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-dbcommand-dbcmd.whatsmyuri" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-dbcommand-dbcmd.whatsmyuri">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.whatsmyuri" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
whatsmyuri
</code>
</span>
</a>
is an internal command.
</p>
</dd>
</dl>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This command is available in deployments hosted in the following environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This command is supported in all MongoDB Atlas clusters.
For information on Atlas support for all commands, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/" target="_self">
<span>
Unsupported Commands
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/security-x.509/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
x.509
<a class="headerlink leafygreen-ui-1kepx47" href="#x.509" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="x.509">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#certificate-authority" target="_self">
<span>
Certificate Authority
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#client-x.509-certificates" target="_self">
<span>
Client x.509 Certificates
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#member-x.509-certificates" target="_self">
<span>
Member x.509 Certificates
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
MongoDB supports x.509 certificate authentication for client
authentication and internal authentication of the members of replica
sets and sharded clusters.
</p>
<p class="leafygreen-ui-1kp3ins">
x.509 certificate authentication requires a secure
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/configure-ssl/">
TLS/SSL
connection
<!-- -->
.
</a>
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Certificate Authority
<a class="headerlink leafygreen-ui-1kepx47" href="#certificate-authority" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="certificate-authority">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
For production use, your MongoDB deployment should use valid
certificates generated and signed by a certificate authority. You or
your organization can generate and maintain an independent certificate
authority, or use certificates generated by third-party TLS vendors.
Obtaining and managing certificates is beyond the scope of this
documentation.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-x509-client-certificate-auth">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Client x.509 Certificates
<a class="headerlink leafygreen-ui-1kepx47" href="#client-x.509-certificates" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="client-x.509-certificates">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To authenticate to servers, clients can use x.509 certificates instead
of usernames and passwords.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-client-x509-certificates-requirements">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Client Certificate Requirements
<a class="headerlink leafygreen-ui-1kepx47" href="#client-certificate-requirements" title="Permalink to this heading">
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</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="client-certificate-requirements">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Client certificate requirements:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A single Certificate Authority (CA) must issue the certificates
for both the client and the server.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Each unique MongoDB user must have a unique certificate.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The x.509 certificate must
<em>
not
</em>
be expired.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
/
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
logs a warning on
connection if the presented x.509 certificate expires within
<code class="leafygreen-ui-1l06pbn">
30
</code>
days of the
<code class="leafygreen-ui-1l06pbn">
mongod/mongos
</code>
host system time.
</p>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Client certificates must contain the following fields:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"keyUsage = digitalSignature\nextendedKeyUsage = clientAuth"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">keyUsage = digitalSignature</td></tr><tr class=""><td class="leafygreen-ui-7razhx">extendedKeyUsage = clientAuth</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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</path>
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</div>
</button>
</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
At least one of the following client certificate attributes must be
<strong>
different
</strong>
than the attributes in both the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-net.tls.clusterFile">
<code class="leafygreen-ui-1l06pbn">
net.tls.clusterFile
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-net.tls.certificateKeyFile">
<code class="leafygreen-ui-1l06pbn">
net.tls.certificateKeyFile
</code>
</a>
server certificates:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Organization (
<code class="leafygreen-ui-1l06pbn">
O
</code>
)
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Organizational Unit (
<code class="leafygreen-ui-1l06pbn">
OU
</code>
)
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Domain Component (
<code class="leafygreen-ui-1l06pbn">
DC
</code>
)
</p>
</li>
</ul>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
You can also disable the
<code class="leafygreen-ui-1l06pbn">
enforceUserClusterSeparation
</code>
parameter during startup to automatically disable the
<code class="leafygreen-ui-1l06pbn">
O/OU/DC
</code>
check. This allows member certificates to
authenticate as users stored in the
<code class="leafygreen-ui-1l06pbn">
$external
</code>
database.
</p>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
subject
</code>
of a client x.509 certificate, which contains the
Distinguished Name (
<code class="leafygreen-ui-1l06pbn">
DN
</code>
), must be
<strong>
different
</strong>
than the
<code class="leafygreen-ui-1l06pbn">
subject
</code>
s
of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/configure-x509-member-authentication/#std-label-x509-member-certificate">
member x.509 certificates
</a>
.
If the MongoDB deployment has
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.tlsX509ClusterAuthDNOverride">
<code class="leafygreen-ui-1l06pbn">
tlsX509ClusterAuthDNOverride
</code>
</a>
set, the client x.509 certificate's subject must not match that value.
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If a client x.509 certificate's subject matches the
<code class="leafygreen-ui-1l06pbn">
O
</code>
,
<code class="leafygreen-ui-1l06pbn">
OU
</code>
, and
<code class="leafygreen-ui-1l06pbn">
DC
</code>
attributes of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/configure-x509-member-authentication/#std-label-x509-member-certificate">
Member x.509 Certificate
</a>
(or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.tlsX509ClusterAuthDNOverride">
<code class="leafygreen-ui-1l06pbn">
tlsX509ClusterAuthDNOverride
</code>
</a>
, if set) exactly, the client
connection is accepted, full permissions are granted, and a warning
message appears in the log.
</p>
<p class="leafygreen-ui-1kp3ins">
Only
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/configure-x509-member-authentication/#std-label-x509-member-certificate">
cluster member x509 certificates
</a>
should use the same
<code class="leafygreen-ui-1l06pbn">
O
</code>
,
<code class="leafygreen-ui-1l06pbn">
OU
</code>
, and
<code class="leafygreen-ui-1l06pbn">
DC
</code>
attribute combinations.
</p>
</div>
</div>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-client-x509-mongodb-user">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
MongoDB User and
<code class="leafygreen-ui-1l06pbn">
$external
</code>
Database
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-user-and--external-database" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-user-and--external-database">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To authenticate with a client certificate, you must first add the client
certificate's
<code class="leafygreen-ui-1l06pbn">
subject
</code>
as a MongoDB user in the
<code class="leafygreen-ui-1l06pbn">
$external
</code>
database.
The
<code class="leafygreen-ui-1l06pbn">
$external
</code>
database is the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/security-users/#std-label-authentication-database">
Authentication Database
</a>
for the user.
</p>
<p class="leafygreen-ui-1kp3ins">
Each unique x.509 client certificate is for one MongoDB user.
You cannot use a single client certificate to authenticate more than one
MongoDB user.
</p>
<p class="leafygreen-ui-1kp3ins">
To use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/read-isolation-consistency-recency/#std-label-sessions">
Client Sessions and Causal Consistency Guarantees
</a>
with
<code class="leafygreen-ui-1l06pbn">
$external
</code>
authentication users
(Kerberos, LDAP, or x.509 users), usernames cannot be greater
than 10k bytes.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
TLS Connection X509 Certificate Startup Warning
<a class="headerlink leafygreen-ui-1kepx47" href="#tls-connection-x509-certificate-startup-warning" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="tls-connection-x509-certificate-startup-warning">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
now
issue a startup warning when their certificates do not include a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-Subject-Alternative-Name">
Subject Alternative Name
</a>
attribute.
</p>
<p class="leafygreen-ui-1kp3ins">
The following platforms do not support common name validation:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
iOS 13 and higher
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
MacOS 10.15 and higher
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Go 1.15 and higher
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Clients using these platforms will not
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/configure-x509-client-authentication/#std-label-x509-client-authentication">
authenticate
</a>
to
MongoDB servers that use x.509 certificates whose hostnames are
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-label-KMIP-subject-alternative-name-CN">
specified by CommonName attributes
<!-- -->
.
</a>
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Member x.509 Certificates
<a class="headerlink leafygreen-ui-1kepx47" href="#member-x.509-certificates" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="member-x.509-certificates">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
For internal authentication between members of sharded clusters and
replica sets, you can use x.509 certificates instead of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/deploy-sharded-cluster-with-keyfile-access-control/">
keyfiles
<!-- -->
.
</a>
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-x509-member-certificate-requirements">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Member Certificate Requirements
<a class="headerlink leafygreen-ui-1kepx47" href="#member-certificate-requirements" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="member-certificate-requirements">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Use member certificates to verify membership to a sharded
cluster or a replica set. Member certificate file paths are
configured with the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-net.tls.clusterFile">
<code class="leafygreen-ui-1l06pbn">
net.tls.clusterFile
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-net.tls.certificateKeyFile">
<code class="leafygreen-ui-1l06pbn">
net.tls.certificateKeyFile
</code>
</a>
options. Members have the
following configuration requirements:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Cluster member configuration must specify a non-empty value for
at least one of the attributes used for authentication. By default, MongoDB accepts:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
the Organization (
<code class="leafygreen-ui-1l06pbn">
O
</code>
)
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
the Organizational Unit (
<code class="leafygreen-ui-1l06pbn">
OU
</code>
)
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
the Domain Component (
<code class="leafygreen-ui-1l06pbn">
DC
</code>
)
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
You can specify alternative attributes to use for authentication by
setting
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-net.tls.clusterAuthX509.extensionValue">
<code class="leafygreen-ui-1l06pbn">
net.tls.clusterAuthX509.extensionValue
</code>
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Cluster member configuration must include the same
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-net.tls.clusterAuthX509.attributes">
<code class="leafygreen-ui-1l06pbn">
net.tls.clusterAuthX509.attributes
</code>
</a>
and use matching values.
Attribute order doesn't matter. The following example sets
<code class="leafygreen-ui-1l06pbn">
O
</code>
and
<code class="leafygreen-ui-1l06pbn">
OU
</code>
, but not
<code class="leafygreen-ui-1l06pbn">
DC
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"net:\n tls:\n clusterAuthX509:\n attributes: O=MongoDB, OU=MongoDB Server","programmingLanguage":"YAML"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light yaml leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-attr">net:</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">tls:</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">clusterAuthX509:</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">attributes:</span> <span class="lg-highlight-string">O=MongoDB,</span> <span class="lg-highlight-string">OU=MongoDB</span> <span class="lg-highlight-string">Server</span></td></tr></tbody></table></code></pre>
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</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</li>
</ul>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If you disable the
<code class="leafygreen-ui-1l06pbn">
enforceUserClusterSeparation
</code>
parameter, the
following behaviors apply:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
O/OU/DC
</code>
check is disabled if
<code class="leafygreen-ui-1l06pbn">
clusterAuthMode
</code>
is
<code class="leafygreen-ui-1l06pbn">
keyFile
</code>
in your configuration file. This allows clients
possessing member certificates to authenticate as users stored in
the
<code class="leafygreen-ui-1l06pbn">
$external
</code>
database.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The server won't start if
<code class="leafygreen-ui-1l06pbn">
clusterAuthMode
</code>
isn't
<code class="leafygreen-ui-1l06pbn">
keyFile
</code>
in
your configuration file.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
If you set the
<code class="leafygreen-ui-1l06pbn">
enforceUserClusterSeparation
</code>
parameter to
<code class="leafygreen-ui-1l06pbn">
false
</code>
,
the server doesn't distinguish between client certificates, which
applications use to authenticate, and intra-cluster certificates, which
have privileged access. This has no effect if your
<code class="leafygreen-ui-1l06pbn">
clusterAuthMode
</code>
is
<code class="leafygreen-ui-1l06pbn">
keyFile
</code>
. However, if your
<code class="leafygreen-ui-1l06pbn">
clusterAuthMode
</code>
is
<code class="leafygreen-ui-1l06pbn">
x509
</code>
, user
certificates that use the allowed scheme are conflated with cluster
certificates and granted privileged access.
</p>
<p class="leafygreen-ui-1kp3ins">
Your existing certificates are granted internal privileges if you do the
following:
</p>
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Create a user, with a name allowed by this parameter.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Set the
<code class="leafygreen-ui-1l06pbn">
enforceUserClusterSeparation
</code>
parameter to
<code class="leafygreen-ui-1l06pbn">
false
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Set
<code class="leafygreen-ui-1l06pbn">
clusterAuthMode
</code>
to
<code class="leafygreen-ui-1l06pbn">
x509
</code>
.
</p>
</li>
</ol>
<p class="leafygreen-ui-1kp3ins">
You must not upgrade from
<code class="leafygreen-ui-1l06pbn">
keyFile
</code>
to
<code class="leafygreen-ui-1l06pbn">
x509
</code>
without validating
that you've removed users with elevated privileges that the
<code class="leafygreen-ui-1l06pbn">
enforceUserClusterSeparation
</code>
flag allowed you to create.
</p>
<p class="leafygreen-ui-1kp3ins">
To set the
<code class="leafygreen-ui-1l06pbn">
enforceUserClusterSeparation
</code>
parameter to
<code class="leafygreen-ui-1l06pbn">
false
</code>
, run the following command during startup:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"mongod --setParameter enforceUserClusterSeparation=false","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongod <!-- -->-<!-- -->-<!-- -->setParameter enforceUserClusterSeparation<!-- -->=<span class="lg-highlight-literal">false</span></td></tr></tbody></table></code></pre>
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</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The certificates have the following requirements:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A single Certificate Authority (CA) must issue all x.509 certificates
for the members of a sharded cluster or a replica set.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
At least one of the Subject Alternative Name (
<code class="leafygreen-ui-1l06pbn">
SAN
</code>
) entries must
match the server hostname used by other cluster members. When
comparing
<code class="leafygreen-ui-1l06pbn">
SAN
</code>
s, MongoDB can compare either DNS names or IP addresses.
</p>
<p class="leafygreen-ui-1kp3ins">
If you don't specify
<code class="leafygreen-ui-1l06pbn">
subjectAltName
</code>
, MongoDB compares the Common
Name (CN) instead. However, this usage of CN is deprecated per
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://datatracker.ietf.org/doc/html/rfc2818" rel="noopener noreferrer">
<span>
RFC2818
</span>
<svg alt="" aria-hidden="true" class="leafygreen-ui-1ie5kuq" height="16" role="presentation" viewbox="0 0 16 16" width="16">
<path d="M13.823 2.4491C13.8201 2.30008 13.6999 2.17994 13.5509 2.17704L9.5062 2.09836C9.25654 2.09351 9.12821 2.39519 9.30482 2.5718L10.3856 3.65257L7.93433 6.10383C7.87964 6.15852 7.83047 6.21665 7.78683 6.27752L5.99909 8.06525C5.46457 8.59977 5.46457 9.4664 5.99909 10.0009C6.53361 10.5354 7.40023 10.5354 7.93475 10.0009L9.72249 8.21317C9.78336 8.16953 9.84148 8.12037 9.89618 8.06567L12.3474 5.61441L13.4282 6.69518C13.6048 6.87179 13.9065 6.74347 13.9016 6.4938L13.823 2.4491Z" fill="currentColor">
</path>
<path d="M7.25 3.12893C7.66421 3.12893 8 3.46472 8 3.87893C8 4.29315 7.66421 4.62893 7.25 4.62893H4C3.72386 4.62893 3.5 4.85279 3.5 5.12893V11.9929C3.5 12.2691 3.72386 12.4929 4 12.4929H10.864C11.1401 12.4929 11.364 12.2691 11.364 11.9929V8.75C11.364 8.33579 11.6998 8 12.114 8C12.5282 8 12.864 8.33579 12.864 8.75V11.9929C12.864 13.0975 11.9686 13.9929 10.864 13.9929H4C2.89543 13.9929 2 13.0975 2 11.9929V5.12893C2 4.02436 2.89543 3.12893 4 3.12893H7.25Z" fill="currentColor">
</path>
</svg>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If the certificate used as the
<code class="leafygreen-ui-1l06pbn">
certificateKeyFile
</code>
includes
<code class="leafygreen-ui-1l06pbn">
extendedKeyUsage
</code>
, the value must include both
<code class="leafygreen-ui-1l06pbn">
clientAuth
</code>
("TLS Web Client Authentication") and
<code class="leafygreen-ui-1l06pbn">
serverAuth
</code>
("TLS Web Server Authentication").
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"extendedKeyUsage = clientAuth, serverAuth"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">extendedKeyUsage = clientAuth, serverAuth</td></tr></tbody></table></code></pre>
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</div>
</div>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If the certificate used as the
<code class="leafygreen-ui-1l06pbn">
clusterFile
</code>
includes
<code class="leafygreen-ui-1l06pbn">
extendedKeyUsage
</code>
, the value must include
<code class="leafygreen-ui-1l06pbn">
clientAuth
</code>
.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"extendedKeyUsage = clientAuth"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">extendedKeyUsage = clientAuth</td></tr></tbody></table></code></pre>
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</li>
</ul>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
MongoDB Configuration for Membership Authentication
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-configuration-for-membership-authentication" title="Permalink to this heading">
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</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-configuration-for-membership-authentication">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
You can use TLS for internal authentication between each member of
your replica set (each
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instance) or sharded
cluster (each
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
instance).
</p>
<p class="leafygreen-ui-1kp3ins">
To use TLS for internal authentication, use the following settings:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-security.clusterAuthMode">
<code class="leafygreen-ui-1l06pbn">
security.clusterAuthMode
</code>
</a>
or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--clusterAuthMode">
<code class="leafygreen-ui-1l06pbn">
--clusterAuthMode
</code>
</a>
set to
<code class="leafygreen-ui-1l06pbn">
x509
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-net.tls.clusterFile">
<code class="leafygreen-ui-1l06pbn">
net.tls.clusterFile
</code>
</a>
or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--clusterAuthMode">
<code class="leafygreen-ui-1l06pbn">
--tlsClusterFile
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-option-mongos.--tlsCertificateKeyFile">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
instances use their certificate key files to
prove their identity to clients, but certificate key files can also be used for
membership authentication. If you do not specify a cluster file,
members use their certificate key files for membership authentication.
Specify the certificate key file with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-net.tls.certificateKeyFile">
<code class="leafygreen-ui-1l06pbn">
net.tls.certificateKeyFile
</code>
</a>
or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--tlsCertificateKeyFile">
<code class="leafygreen-ui-1l06pbn">
--tlsCertificateKeyFile
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
To use the certificate key file for both client authentication and
membership authentication, the certificate must either:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Omit
<code class="leafygreen-ui-1l06pbn">
extendedKeyUsage
</code>
or
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Specify
<code class="leafygreen-ui-1l06pbn">
extendedKeyUsage = serverAuth, clientAuth
</code>
</p>
</li>
</ul>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/queryable-encryption/fundamentals/manage-collections/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Encrypted Collections
<a class="headerlink leafygreen-ui-1kepx47" href="#encrypted-collections" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="encrypted-collections">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#overview" target="_self">
<span>
Overview
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#metadata-collections" target="_self">
<span>
Metadata Collections
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#equality-and-range-query-impact" target="_self">
<span>
Equality and Range Query Impact
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#write-costs-for-equality-queryable-fields" target="_self">
<span>
Write Costs for Equality Queryable Fields
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#insert-operations" target="_self">
<span>
Insert Operations
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#update-operations" target="_self">
<span>
Update Operations
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#delete-operations" target="_self">
<span>
Delete Operations
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#storage-costs-for-equality-queryable-fields" target="_self">
<span>
Storage Costs for Equality Queryable Fields
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#best-practices" target="_self">
<span>
Best Practices
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#metadata-collection-compaction" target="_self">
<span>
Metadata Collection Compaction
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#scheduling-metadata-compaction" target="_self">
<span>
Scheduling Metadata Compaction
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#running-metadata-compaction" target="_self">
<span>
Running Metadata Compaction
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
Field level encryption comes with performance and storage costs. Every
field you choose to encrypt:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Adds writes to insert and update operations.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Requires additional storage, because MongoDB maintains an index of
encrypted fields to improve query performance.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
This section summarizes the storage and write impact of encrypting collections,
and explains how to compact encrypted collection indexes to minimize these
costs. If you want to encrypt fields and configure them for querying, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/queryable-encryption/fundamentals/encrypt-and-query/#std-label-qe-fundamentals-encrypt-query">
Encrypted Fields and Enabled Queries
<!-- -->
.
</a>
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Overview
<a class="headerlink leafygreen-ui-1kepx47" href="#overview" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="overview">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Queryable Encryption introduces the ability to encrypt sensitive fields in your documents
using randomized encryption, while still being able to query the encrypted
fields.
</p>
<p class="leafygreen-ui-1kp3ins">
With Queryable Encryption, a given plaintext value always encrypts to a different
ciphertext, while still remaining queryable. To enable
this functionality, Queryable Encryption uses three data structures:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Two metadata collections
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A field in every document in the encrypted collection called
<code class="leafygreen-ui-1l06pbn">
__safeContent__
</code>
</p>
</li>
</ul>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
It is critical that these data structures are not modified or
deleted, or query results will be incorrect.
</p>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-qe-metadata-collections">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Metadata Collections
<a class="headerlink leafygreen-ui-1kepx47" href="#metadata-collections" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="metadata-collections">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
When you create an encrypted collection, MongoDB creates two
metadata collections:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
enxcol_.<collectionName>.esc
</code>
, referred to as
<code class="leafygreen-ui-1l06pbn">
ESC
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
enxcol_.<collectionName>.ecoc
</code>
, referred to as
<code class="leafygreen-ui-1l06pbn">
ECOC
</code>
</p>
</li>
</ul>
<div class="leafygreen-ui-vg7qwp" role="note">
<h2 class="leafygreen-ui-2xicti">
Example
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If you create a collection called "patients", MongoDB creates the
following metadata collections:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
enxcol_.patients.esc
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
enxcol_.patients.ecoc
</code>
</p>
</li>
</ul>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
When you insert documents with a queryable encrypted field,
MongoDB updates the metadata collections to maintain an index
that enables querying. The field becomes an "indexed field". This
comes at a cost in storage and write speed for every such field.
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
When you drop an encrypted collection, drop the associated metadata
collections immediately afterwards:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
enxcol_.<collectionName>.esc
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
enxcol_.<collectionName>.ecoc
</code>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Otherwise, re-creating the collection with the same name puts the metadata
collections in a conflicted state that consumes excess storage space and
degrades CRUD performance.
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Equality and Range Query Impact
<a class="headerlink leafygreen-ui-1kepx47" href="#equality-and-range-query-impact" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="equality-and-range-query-impact">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Equality queries carry fixed additional costs for storage and write operations.
Range query costs depend on the queryable field's
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/queryable-encryption/fundamentals/encrypt-and-query/#std-label-qe-field-configuration">
parameters
</a>
. Tightly bounding these queries greatly decreases their performance impact.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Write Costs for Equality Queryable Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#write-costs-for-equality-queryable-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="write-costs-for-equality-queryable-fields">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Insert Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#insert-operations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="insert-operations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
When inserting a document, each indexed field requires two additional writes to
metadata collections.
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
One write to
<code class="leafygreen-ui-1l06pbn">
ESC
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
One write to
<code class="leafygreen-ui-1l06pbn">
ECOC
</code>
</p>
</li>
</ul>
<div class="leafygreen-ui-vg7qwp" role="note">
<h2 class="leafygreen-ui-2xicti">
Example
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Inserting a document with two indexed fields requires:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
One write to the encrypted collection.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Four writes to the metadata collections.
</p>
</li>
</ul>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Update Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#update-operations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="update-operations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
When updating a document, each indexed field requires two additional writes to
metadata collections.
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
One write to
<code class="leafygreen-ui-1l06pbn">
ESC
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
One write to
<code class="leafygreen-ui-1l06pbn">
ECOC
</code>
</p>
</li>
</ul>
<div class="leafygreen-ui-vg7qwp" role="note">
<h2 class="leafygreen-ui-2xicti">
Example
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Updating a document with two indexed fields requires:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
One write to the encrypted collection.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Four writes to the metadata collections.
</p>
</li>
</ul>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Delete Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#delete-operations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="delete-operations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
When deleting a document, indexed fields do not require any additional writes.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Storage Costs for Equality Queryable Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#storage-costs-for-equality-queryable-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="storage-costs-for-equality-queryable-fields">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Before any metadata compaction, the
<code class="leafygreen-ui-1l06pbn">
ESC
</code>
and
<code class="leafygreen-ui-1l06pbn">
ECOC
</code>
contain one metadata
document for every field/value pair of every indexed field. Indexing one
encrypted field/value pair across 1000 documents requires 1000 documents in
the
<code class="leafygreen-ui-1l06pbn">
ESC
</code>
and 1000 documents in the
<code class="leafygreen-ui-1l06pbn">
ECOC
</code>
.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
A Queryable Encryption collection that encrypts every field can take up to 2-3 times the
storage space, to account for metadata collections. For example, a 1 GB
collection may have a storage requirement of 2-3 GB.
</p>
</div>
</div>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Best Practices
<a class="headerlink leafygreen-ui-1kepx47" href="#best-practices" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="best-practices">
</div>
</a>
</h3>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Don't encrypt fields that don't need it. Most data only requires a small
subset of fields to be encrypted, such as those that contain Personally
Identifiable Information.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Don't enable range queries on a field if equality queries are sufficient for
your users.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
For encrypted fields with range queries enabled, review the field
configuration, especially the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/queryable-encryption/fundamentals/encrypt-and-query/#std-label-qe-field-min-max">
min, max,
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/queryable-encryption/fundamentals/encrypt-and-query/#std-label-qe-field-precision">
precision
</a>
parameters. Setting tight bounds for
range queries greatly decreases the performance impact of those fields.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/data-modeling/#std-label-manual-data-modeling-intro">
Model your data
</a>
and prototype it to
determine the actual storage and write increases for your deployment.
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-qe-metadata-compaction">
</span>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Metadata Collection Compaction
<a class="headerlink leafygreen-ui-1kepx47" href="#metadata-collection-compaction" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="metadata-collection-compaction">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
As you insert or update documents, the metadata collections change and grow.
Metadata collection compaction empties the
<code class="leafygreen-ui-1l06pbn">
ECOC
</code>
and reduces the size of the
<code class="leafygreen-ui-1l06pbn">
ESC
</code>
.
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Scheduling Metadata Compaction
<a class="headerlink leafygreen-ui-1kepx47" href="#scheduling-metadata-compaction" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="scheduling-metadata-compaction">
</div>
</a>
</h3>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
In the worst case, running metadata compaction reveals the number of unique
field/value pairs inserted across all documents since the previous
compaction.
</p>
<p class="leafygreen-ui-1kp3ins">
For details on the exact information revealed by metadata compaction,
see "Section 6: Theoretical Analysis" and "Section 9: Guidelines" in
MongoDB's
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/collateral/queryable-encryption-technical-paper" target="_self">
<span>
Queryable Encryption Technical Paper
</span>
</a>
.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
As a best practice, keep track of the following information:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
encfields
</code>
: the number of encrypted fields per document.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
docinserts
</code>
: the number of documents inserted since the last compaction.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
valinserts
</code>
: the number of unique field/value pairs inserted since the
last compaction.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
To reduce the size of the
<code class="leafygreen-ui-1l06pbn">
ESC
</code>
metadata collection by at least
<code class="leafygreen-ui-1l06pbn">
t
</code>
documents, run metadata compaction when the following formula is
satisfied:
</p>
<p class="leafygreen-ui-1kp3ins">
(
<code class="leafygreen-ui-1l06pbn">
encfields
</code>
·
<code class="leafygreen-ui-1l06pbn">
docinserts
</code>
) -
<code class="leafygreen-ui-1l06pbn">
valinserts
</code>
≥
<code class="leafygreen-ui-1l06pbn">
t
</code>
</p>
<p class="leafygreen-ui-1kp3ins">
The number of encrypted fields per document multiplied by the number of
insertions since last compaction, minus the number of unique field/value
pairs inserted across all documents since the last compaction, should be
greater than or equal to the number of documents to remove from the
<code class="leafygreen-ui-1l06pbn">
ESC
</code>
.
</p>
<section>
<h4 class="contains-headerlink leafygreen-ui-1vzlt5f">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h4>
<p class="leafygreen-ui-1kp3ins">
For example, in a collection with six encrypted fields, you can reduce the
size of the
<code class="leafygreen-ui-1l06pbn">
ESC
</code>
by at least 1000 documents when total documents inserted
and unique field/value pairs inserted since the last compaction meet the
following conditions:
</p>
<p class="leafygreen-ui-1kp3ins">
(6 ·
<code class="leafygreen-ui-1l06pbn">
docinserts
</code>
) -
<code class="leafygreen-ui-1l06pbn">
valinserts
</code>
≥
<code class="leafygreen-ui-1l06pbn">
1000
</code>
</p>
<p class="leafygreen-ui-1kp3ins">
The formula would be satisfied, for example, if 200 documents were inserted
since the last compaction with a total of 200 unique field/value pairs across
all documents, or if 400 documents were inserted since the last compaction
with 700 unique field/value pairs.
</p>
</section>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Running Metadata Compaction
<a class="headerlink leafygreen-ui-1kepx47" href="#running-metadata-compaction" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="running-metadata-compaction">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
You must run metadata compaction manually. Use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
and
run the
<code class="leafygreen-ui-1l06pbn">
db.collection.compactStructuredEncryptionData()
</code>
command:
</p>
<div class="leafygreen-ui-vg7qwp" role="note">
<h2 class="leafygreen-ui-2xicti">
Example
</h2>
<div class="leafygreen-ui-9mycqc">
<div class="css-1f5771r">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"const eDB = \"encryption\"\nconst eKV = \"__keyVault\"\nconst secretDB = \"records\"\nconst secretCollection = \"patients\"\nconst localKey = fs.readFileSync(\"master-key.txt\")\n\nconst localKeyProvider = { key: localKey }\n\nconst queryableEncryptionOpts = {\n kmsProviders: { local: localKeyProvider },\n keyVaultNamespace: `${eDB}.${eKV}`,\n}\n\nconst encryptedClient = Mongo(\"localhost:27017\", queryableEncryptionOpts)\n\nconst encryptedDB = encryptedClient.getDB(secretDB)\nconst encryptedCollection = encryptedDB.getCollection(secretCollection)\nencryptedCollection.compactStructuredEncryptionData()","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> eDB <!-- -->= <span class="lg-highlight-string">"encryption"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> eKV <!-- -->= <span class="lg-highlight-string">"__keyVault"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> secretDB <!-- -->= <span class="lg-highlight-string">"records"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> secretCollection <!-- -->= <span class="lg-highlight-string">"patients"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> localKey <!-- -->= <!-- -->fs.<span class="lg-highlight-title lg-highlight-function">readFileSync</span>(<span class="lg-highlight-string">"master-key.txt"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> localKeyProvider <!-- -->= <!-- -->{ <span class="lg-highlight-attr">key</span>: <!-- -->localKey }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> queryableEncryptionOpts <!-- -->= <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">kmsProviders</span>: <!-- -->{ <span class="lg-highlight-attr">local</span>: <!-- -->localKeyProvider }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">keyVaultNamespace</span>: <span class="lg-highlight-string">`</span><span class="lg-highlight-subst lg-highlight-string">${eDB}</span><span class="lg-highlight-string">.</span><span class="lg-highlight-subst lg-highlight-string">${eKV}</span><span class="lg-highlight-string">`</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> encryptedClient <!-- -->= <span class="lg-highlight-title lg-highlight-class">Mongo</span>(<span class="lg-highlight-string">"localhost:27017"</span>, <!-- -->queryableEncryptionOpts)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> encryptedDB <!-- -->= <!-- -->encryptedClient.<span class="lg-highlight-title lg-highlight-function">getDB</span>(<!-- -->secretDB)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">const</span> encryptedCollection <!-- -->= <!-- -->encryptedDB.<span class="lg-highlight-title lg-highlight-function">getCollection</span>(<!-- -->secretCollection)</td></tr><tr class="leafygreen-ui-1wr1lm6"><td class="leafygreen-ui-7razhx">encryptedCollection.<span class="lg-highlight-title lg-highlight-function">compactStructuredEncryptionData</span>(<!-- -->)</td></tr></tbody></table></code></pre>
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</div>
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<pre class="leafygreen-ui-12cejcz" tabindex="-1"><code class="lg-highlight-hljs-dark json leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"stats"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-punctuation">{</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-punctuation">}</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">"ok"</span><span class="lg-highlight-punctuation">:</span> <span class="lg-highlight-number">1</span><span class="lg-highlight-punctuation">,</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-punctuation">}</span></td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
You can check the size of a metadata collection using
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
and running the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.totalSize/#mongodb-method-db.collection.totalSize">
<code class="leafygreen-ui-1l06pbn">
db.collection.totalSize()
</code>
</a>
command.
</p>
<div class="leafygreen-ui-vg7qwp" role="note">
<h2 class="leafygreen-ui-2xicti">
Example
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
In this example, the encrypted collection is named "patients".
</p>
<div class="css-1f5771r">
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.enxcol_.patients.esc.totalSize()","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">enxcol_</span>.<span class="lg-highlight-property">patients</span>.<span class="lg-highlight-property">esc</span>.<span class="lg-highlight-title lg-highlight-function">totalSize</span>(<!-- -->)</td></tr></tbody></table></code></pre>
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{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"1407960328","programmingLanguage":"Shell"}
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<pre class="leafygreen-ui-1qhgg7e" tabindex="-1"><code class="lg-highlight-hljs-dark shell leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">1407960328</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/read-concern-available/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Read Concern
<code class="leafygreen-ui-1l06pbn">
"available"
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#read-concern--available-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="read-concern--available-">
</div>
</a>
</h1>
<p class="leafygreen-ui-1kp3ins">
A query with read concern
<code class="leafygreen-ui-1l06pbn">
"available"
</code>
returns data from the instance
with no guarantee that the data has been written to a majority of the
replica set members (i.e. may be rolled back).
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<strong>
For a sharded cluster
</strong>
,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-readconcern-readconcern.-available-" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
"available"
</code>
</span>
</a>
read concern
provides greater tolerance for partitions.
</p>
<p class="leafygreen-ui-1kp3ins">
Queries with the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-readconcern-readconcern.-available-" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
"available"
</code>
</span>
</a>
read concern don't require a
check to ensure that the correct shard received the query.
</p>
<p class="leafygreen-ui-1kp3ins">
In the event of network partitions, these queries route to the shard
considered appropriate before the network partition occurred. They do not
wait for consistency guarantees from servers that may be unavailable. If
the shard was undergoing chunk migration, queries with
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-readconcern-readconcern.-available-" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
"available"
</code>
</span>
</a>
can return
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-orphaned-document">
orphaned documents
<!-- -->
.
</a>
</p>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-program-mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
does not guarantee that queries with read concern
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-readconcern-readconcern.-available-" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
"available"
</code>
</span>
</a>
route to the correct shards. The shard that
receives the query returns data, but this shard may not be the
authoritative owner of the requested data.
</p>
<p class="leafygreen-ui-1kp3ins">
This can cause queries to return incorrect or unexpected results.
</p>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<strong>
For unsharded collections
</strong>
(including collections in a standalone
deployment or a replica set deployment),
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-local/#mongodb-readconcern-readconcern.-local-">
<code class="leafygreen-ui-1l06pbn">
"local"
</code>
</a>
and
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-readconcern-readconcern.-available-" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
"available"
</code>
</span>
</a>
read concerns behave identically.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Regardless of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-read-concern">
read concern
</a>
level, the most recent data on a
node may not reflect the most recent version of the data in the system.
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.orphanCleanupDelaySecs">
<code class="leafygreen-ui-1l06pbn">
orphanCleanupDelaySecs
</code>
</a>
</p>
</div>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Availability
<a class="headerlink leafygreen-ui-1kepx47" href="#availability" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="availability">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Read concern
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-readconcern-readconcern.-available-" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
"available"
</code>
</span>
</a>
is
<strong class="css-4dei7l">
unavailable for use
</strong>
with causally consistent sessions and transactions.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Consider the following timeline of a write operation Write
<sub>
0
</sub>
to
a three member replica set:
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
For simplification, the example assumes:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
All writes prior to Write
<sub>
0
</sub>
have been successfully
replicated to all members.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Write
<sub>
prev
</sub>
is the previous write before Write
<sub>
0
</sub>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
No other writes have occured after Write
<sub>
0
</sub>
.
</p>
</li>
</ul>
</div>
</div>
<div class="figure css-5vkxs0" style="width:340px">
<img alt="Timeline of a write operation to a three member replica set" class="leafygreen-ui-1qnf57e" height="112" src="/docs/manual/images/read-concern-write-timeline.svg" style="--border-color:#C1C7C6" width="340"/>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:45%"/>
<col style="width:25%"/>
<col style="width:25%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Time
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Event
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Most Recent Write
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Most Recent w: "majority" write
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
t
<sub>
0
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Primary applies Write
<sub>
0
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<strong>
Primary
</strong>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
1
</sub>
: Write
<sub>
prev
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
2
</sub>
: Write
<sub>
prev
</sub>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<strong>
Primary
</strong>
: Write
<sub>
prev
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
1
</sub>
: Write
<sub>
prev
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
2
</sub>
: Write
<sub>
prev
</sub>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
t
<sub>
1
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Secondary
<sub>
1
</sub>
applies write
<sub>
0
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<strong>
Primary
</strong>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
1
</sub>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
2
</sub>
: Write
<sub>
prev
</sub>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<strong>
Primary
</strong>
: Write
<sub>
prev
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
1
</sub>
: Write
<sub>
prev
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
2
</sub>
: Write
<sub>
prev
</sub>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
t
<sub>
2
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Secondary
<sub>
2
</sub>
applies write
<sub>
0
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<strong>
Primary
</strong>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
1
</sub>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
2
</sub>
: Write
<sub>
0
</sub>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<strong>
Primary
</strong>
: Write
<sub>
prev
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
1
</sub>
: Write
<sub>
prev
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
2
</sub>
: Write
<sub>
prev
</sub>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
t
<sub>
3
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Primary is aware of successful replication to Secondary
<sub>
1
</sub>
and sends acknowledgment to client
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<strong>
Primary
</strong>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
1
</sub>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
2
</sub>
: Write
<sub>
0
</sub>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<strong>
Primary
</strong>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
1
</sub>
: Write
<sub>
prev
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
2
</sub>
: Write
<sub>
prev
</sub>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
t
<sub>
4
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Primary is aware of successful replication to Secondary
<sub>
2
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<strong>
Primary
</strong>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
1
</sub>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
2
</sub>
: Write
<sub>
0
</sub>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<strong>
Primary
</strong>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
1
</sub>
: Write
<sub>
prev
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
2
</sub>
: Write
<sub>
prev
</sub>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
t
<sub>
5
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Secondary
<sub>
1
</sub>
receives notice (through regular replication mechanism) to update its snapshot of its most recent w: "majority" write
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<strong>
Primary
</strong>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
1
</sub>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
2
</sub>
: Write
<sub>
0
</sub>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<strong>
Primary
</strong>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
1
</sub>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
2
</sub>
: Write
<sub>
prev
</sub>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
t
<sub>
6
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Secondary
<sub>
2
</sub>
receives notice (through regular replication mechanism) to update its snapshot of its most recent w: "majority" write
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<strong>
Primary
</strong>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
1
</sub>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
2
</sub>
: Write
<sub>
0
</sub>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<strong>
Primary
</strong>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
1
</sub>
: Write
<sub>
0
</sub>
</div>
<div class="line">
<strong>
Secondary
</strong>
<sub>
2
</sub>
: Write
<sub>
0
</sub>
</div>
</div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
Then, the following tables summarizes the state of the data that a read
operation with
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-readconcern-readconcern.-available-" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
"available"
</code>
</span>
</a>
read concern would see at
time
<code class="leafygreen-ui-1l06pbn">
T
</code>
.
</p>
<div class="figure css-5vkxs0" style="width:330px">
<img alt="Timeline of a write operation to a three member replica set." class="leafygreen-ui-1qnf57e" height="112" src="/docs/manual/images/read-concern-write-timeline.svg" style="--border-color:#C1C7C6" width="340"/>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:40%"/>
<col style="width:30%"/>
<col style="width:30%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Read Target
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Time
<code class="leafygreen-ui-1l06pbn">
T
</code>
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
State of Data
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Primary
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
After t
<sub>
0
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Data reflects Write
<sub>
0
</sub>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Secondary
<sub>
1
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Before t
<sub>
1
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Data reflects Write
<sub>
prev
</sub>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Secondary
<sub>
1
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
After t
<sub>
1
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Data reflects Write
<sub>
0
</sub>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Secondary
<sub>
2
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Before t
<sub>
2
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Data reflects Write
<sub>
prev
</sub>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Secondary
<sub>
2
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
After t
<sub>
2
</sub>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Data reflects Write
<sub>
0
</sub>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/tutorial/sharding-distribute-collections-with-zones/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Distribute Collections Using Zones
<a class="headerlink leafygreen-ui-1kepx47" href="#distribute-collections-using-zones" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="distribute-collections-using-zones">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#prerequisites" target="_self">
<span>
Prerequisites
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#scenario" target="_self">
<span>
Scenario
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#architecture" target="_self">
<span>
Architecture
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#zones" target="_self">
<span>
Zones
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#shard-key" target="_self">
<span>
Shard Key
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#balancer" target="_self">
<span>
Balancer
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#steps" target="_self">
<span>
Steps
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#add-each-shard-to-the-appropriate-zone." target="_self">
<span>
Add each shard to the appropriate zone.
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#add-zone-ranges-for-the-relevant-collections." target="_self">
<span>
Add zone ranges for the relevant collections.
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#shard-the-collections." target="_self">
<span>
Shard the collections.
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#review-the-changes." target="_self">
<span>
Review the changes.
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#learn-more" target="_self">
<span>
Learn More
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
In sharded clusters, you can create
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-zone">
zones
</a>
of sharded data
based on the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-shard-key">
shard key
</a>
. You can associate each zone with one or
more shards in the cluster. A shard can associate with any number of
zones. In a balanced cluster, MongoDB migrates
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-chunk">
chunks
</a>
covered by a zone only to those shards associated with the zone.
</p>
<p class="leafygreen-ui-1kp3ins">
You can use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/zone-sharding/#std-label-zone-sharding">
zone sharding
</a>
to distribute
collections across a sharded cluster and designate which shards store
data for each collection. You can distribute collections based on shard
properties, such as physical resources and available memory, to ensure
that each collection is stored on the optimal shard for that data.
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Prerequisites
<a class="headerlink leafygreen-ui-1kepx47" href="#prerequisites" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="prerequisites">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To complete this tutorial, you must:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/deploy-shard-cluster/#std-label-sharding-procedure-setup">
Deploy a sharded cluster
</a>
. This
tutorial uses a sharded cluster with three shards.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Connect to a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-program-mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
. You cannot create zones or zone ranges
by connecting directly to a shard.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Authenticate as a user with at least the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/built-in-roles/#mongodb-authrole-clusterManager">
<code class="leafygreen-ui-1l06pbn">
clusterManager
</code>
</a>
role on the
<code class="leafygreen-ui-1l06pbn">
admin
</code>
database. To view user permissions, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.getUser/#mongodb-method-db.getUser">
<code class="leafygreen-ui-1l06pbn">
db.getUser()
</code>
</a>
method.
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Scenario
<a class="headerlink leafygreen-ui-1kepx47" href="#scenario" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="scenario">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You have a database called
<code class="leafygreen-ui-1l06pbn">
shardDistributionDB
</code>
that contains two
sharded collections:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
bigData
</code>
, which contains a large amount of data.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
manyIndexes
</code>
, which contains many large indexes.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
You want to limit each collection to a subset of shards so that each
collection can use the shards' different physical resources.
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Architecture
<a class="headerlink leafygreen-ui-1kepx47" href="#architecture" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="architecture">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The sharded cluster has three shards. Each shard has unique physical
resources:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:8%"/>
<col style="width:20%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Shard Name
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Physical Resources
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
shard0
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
High memory capacity
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
shard1
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Fast flash storage
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
shard2
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
High memory capacity
<strong>
and
</strong>
fast flash storage
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Zones
<a class="headerlink leafygreen-ui-1kepx47" href="#zones" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="zones">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To distribute collections based on physical resources, use shard zones.
A shard zone associates collections with a specific subset of shards,
which restricts the shards that store the collection's data. In this
example, you need two shard zones:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:15%"/>
<col style="width:20%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Zone Name
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Collections in this Zone
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
HI_RAM
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Servers with high memory capacity.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Collections requiring more memory, such as collections with large
indexes, should be on the
<code class="leafygreen-ui-1l06pbn">
HI_RAM
</code>
shards.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
FLASH
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Servers with flash drives for fast storage speeds.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Large collections requiring fast data retrieval should be on the
<code class="leafygreen-ui-1l06pbn">
FLASH
</code>
shards.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Shard Key
<a class="headerlink leafygreen-ui-1kepx47" href="#shard-key" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="shard-key">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
In this tutorial, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-shard-key/#std-label-shard-key">
shard key
</a>
you will use to shard
each collection is
<code class="leafygreen-ui-1l06pbn">
{ _id: "hashed" }
</code>
. You will configure shard zones
<strong>
before
</strong>
you shard the collections. As a result, each collection's
data only ever exists on the shards in the corresponding zone.
</p>
<p class="leafygreen-ui-1kp3ins">
With
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-hashed/#std-label-index-type-hashed">
hashed sharding
</a>
, if you shard
collections before you configure zones, MongoDB assigns
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-chunk">
chunks
</a>
evenly between all shards when sharding is enabled. This means
that chunks may be temporarily assigned to a shard poorly suited to
handle that chunk's data.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Balancer
<a class="headerlink leafygreen-ui-1kepx47" href="#balancer" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="balancer">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-balancer-administration/#std-label-sharding-balancing">
balancer
</a>
migrates chunks to the
appropriate shard, respecting any configured zones. When balancing is
complete, shards only contain chunks whose ranges match its assigned
zones.
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
Performance
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Adding, removing, or changing zones or zone ranges can result in
chunk migrations. Depending on the size of your dataset and the
number of chunks a zone or zone range affects, these migrations may
impact cluster performance. Consider running the balancer during
specific scheduled windows. To learn how to set a scheduling window,
see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/manage-sharded-cluster-balancer/#std-label-sharding-schedule-balancing-window">
Schedule the Balancing Window
<!-- -->
.
</a>
</p>
</div>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Steps
<a class="headerlink leafygreen-ui-1kepx47" href="#steps" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="steps">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Use the following procedure to configure shard zones and distribute
collections based on shard physical resources.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"HowTo","steps":[{"@type":"HowToStep","text":"To configure the shards in each zone, use the\naddShardToZone command.Add shard0 and shard2 to the HI_RAM zone:Add shard1 and shard2 to the FLASH zone:","name":"Add each shard to the appropriate zone."},{"@type":"HowToStep","text":"To associate a range of\nshard keys to a zone, use sh.updateZoneKeyRange().In this scenario, you want to associate all documents in a\ncollection to the appropriate zone. To associate all collection\ndocuments to a zone, specify the following zone range:a lower bound of { \"_id\" : MinKey }an upper bound of { \"_id\" : MaxKey }For the bigData collection, set:The namespace to shardDistributionDB.bigData,The lower bound to MinKey,The upper bound to MaxKey,The zone to FLASHFor the manyIndexes collection, set:The namespace to shardDistributionDB.manyIndexes,The lower bound to MinKey,The upper bound to MaxKey,The zone to HI_RAM","name":"Add zone ranges for the relevant collections."},{"@type":"HowToStep","text":"To shard both collections (bigData and manyIndexes),\nspecify a shard key of { _id: \"hashed\" }.Run the following commands:","name":"Shard the collections."},{"@type":"HowToStep","text":"To view chunk distribution and shard zones, use the\nsh.status() method:The next time the balancer runs, it\nsplits chunks where necessary and migrates chunks across the\nshards, respecting the configured zones. The amount of time the\nbalancer takes to complete depends on several factors, including\nnumber of shards, available memory, and\nIOPS (Input/Output Operations Per Second).When balancing finishes:Chunks for documents in the manyIndexes collection reside on\nshard0 and shard2Chunks for documents in the bigData collection reside on\nshard1 and shard2.","name":"Review the changes."}],"name":"Steps","image":"https://webimages.mongodb.com/_com_assets/cms/kuyj2focmkbxv7gh3-stacked_default_slate_blue.svg?auto=format%252Ccompress"}
</script>
<div class="css-qum8nr eccljxs0">
<div class="css-vq8pj5 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-18jxsvu e1ckbxcu2">
1
</div>
</div>
<div class="css-clrhqf">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Add each shard to the appropriate zone.
<a class="headerlink leafygreen-ui-1kepx47" href="#add-each-shard-to-the-appropriate-zone." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="add-each-shard-to-the-appropriate-zone.">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To configure the shards in each zone, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/addShardToZone/#mongodb-dbcommand-dbcmd.addShardToZone">
<code class="leafygreen-ui-1l06pbn">
addShardToZone
</code>
</a>
command.
</p>
<p class="leafygreen-ui-1kp3ins">
Add
<code class="leafygreen-ui-1l06pbn">
shard0
</code>
and
<code class="leafygreen-ui-1l06pbn">
shard2
</code>
to the
<code class="leafygreen-ui-1l06pbn">
HI_RAM
</code>
zone:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.addShardToZone(\"shard0\", \"HI_RAM\")\n\nsh.addShardToZone(\"shard2\", \"HI_RAM\")","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">addShardToZone</span>(<span class="lg-highlight-string">"shard0"</span>, <span class="lg-highlight-string">"HI_RAM"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">addShardToZone</span>(<span class="lg-highlight-string">"shard2"</span>, <span class="lg-highlight-string">"HI_RAM"</span>)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Add
<code class="leafygreen-ui-1l06pbn">
shard1
</code>
and
<code class="leafygreen-ui-1l06pbn">
shard2
</code>
to the
<code class="leafygreen-ui-1l06pbn">
FLASH
</code>
zone:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.addShardToZone(\"shard1\", \"FLASH\")\n\nsh.addShardToZone(\"shard2\", \"FLASH\")","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">addShardToZone</span>(<span class="lg-highlight-string">"shard1"</span>, <span class="lg-highlight-string">"FLASH"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">addShardToZone</span>(<span class="lg-highlight-string">"shard2"</span>, <span class="lg-highlight-string">"FLASH"</span>)</td></tr></tbody></table></code></pre>
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</div>
<div class="css-vq8pj5 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-18jxsvu e1ckbxcu2">
2
</div>
</div>
<div class="css-clrhqf">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Add zone ranges for the relevant collections.
<a class="headerlink leafygreen-ui-1kepx47" href="#add-zone-ranges-for-the-relevant-collections." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="add-zone-ranges-for-the-relevant-collections.">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To associate a range of
shard keys to a zone, use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.updateZoneKeyRange/#mongodb-method-sh.updateZoneKeyRange">
<code class="leafygreen-ui-1l06pbn">
sh.updateZoneKeyRange()
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
In this scenario, you want to associate all documents in a
collection to the appropriate zone. To associate all collection
documents to a zone, specify the following zone range:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
a lower bound of
<code class="leafygreen-ui-1l06pbn">
{ "_id" : MinKey }
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
an upper bound of
<code class="leafygreen-ui-1l06pbn">
{ "_id" : MaxKey }
</code>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For the
<code class="leafygreen-ui-1l06pbn">
bigData
</code>
collection, set:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The namespace to
<code class="leafygreen-ui-1l06pbn">
shardDistributionDB.bigData
</code>
,
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The lower bound to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-MinKey">
<code class="leafygreen-ui-1l06pbn">
MinKey
</code>
,
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The upper bound to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-MaxKey">
<code class="leafygreen-ui-1l06pbn">
MaxKey
</code>
,
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The zone to
<code class="leafygreen-ui-1l06pbn">
FLASH
</code>
</p>
</li>
</ul>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.updateZoneKeyRange(\n \"shardDistributionDB.bigData\",\n { \"_id\" : MinKey },\n { \"_id\" : MaxKey },\n \"FLASH\"\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">updateZoneKeyRange</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"shardDistributionDB.bigData"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">MinKey</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">MaxKey</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"FLASH"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For the
<code class="leafygreen-ui-1l06pbn">
manyIndexes
</code>
collection, set:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The namespace to
<code class="leafygreen-ui-1l06pbn">
shardDistributionDB.manyIndexes
</code>
,
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The lower bound to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-MinKey">
<code class="leafygreen-ui-1l06pbn">
MinKey
</code>
,
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The upper bound to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-MaxKey">
<code class="leafygreen-ui-1l06pbn">
MaxKey
</code>
,
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The zone to
<code class="leafygreen-ui-1l06pbn">
HI_RAM
</code>
</p>
</li>
</ul>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.updateZoneKeyRange(\n \"shardDistributionDB.manyIndexes\",\n { \"_id\" : MinKey },\n { \"_id\" : MaxKey },\n \"HI_RAM\"\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">updateZoneKeyRange</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"shardDistributionDB.manyIndexes"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">MinKey</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">MaxKey</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"HI_RAM"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
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</div>
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<div class="css-18fui5z e1ckbxcu0">
<div class="css-18jxsvu e1ckbxcu2">
3
</div>
</div>
<div class="css-clrhqf">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Shard the collections.
<a class="headerlink leafygreen-ui-1kepx47" href="#shard-the-collections." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="shard-the-collections.">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To shard both collections (
<code class="leafygreen-ui-1l06pbn">
bigData
</code>
and
<code class="leafygreen-ui-1l06pbn">
manyIndexes
</code>
),
specify a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-shard-key/#std-label-shard-key">
shard key
</a>
of
<code class="leafygreen-ui-1l06pbn">
{ _id: "hashed" }
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
Run the following commands:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.shardCollection(\n \"shardDistributionDB.bigData\", { _id: \"hashed\" }\n)\n\nsh.shardCollection(\n \"shardDistributionDB.manyIndexes\", { _id: \"hashed\" }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">shardCollection</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"shardDistributionDB.bigData"</span>, <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-string">"hashed"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">shardCollection</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"shardDistributionDB.manyIndexes"</span>, <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-string">"hashed"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</div>
</div>
<div class="css-vq8pj5 e1ckbxcu1">
<div class="css-18fui5z e1ckbxcu0">
<div class="css-18jxsvu e1ckbxcu2">
4
</div>
</div>
<div class="css-clrhqf">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Review the changes.
<a class="headerlink leafygreen-ui-1kepx47" href="#review-the-changes." title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="review-the-changes.">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To view chunk distribution and shard zones, use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/sh.status/#mongodb-method-sh.status">
<code class="leafygreen-ui-1l06pbn">
sh.status()
</code>
</a>
method:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"sh.status()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">sh.<span class="lg-highlight-title lg-highlight-function">status</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The next time the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-balancer-administration/#std-label-sharding-balancing">
balancer
</a>
runs, it
splits chunks where necessary and migrates chunks across the
shards, respecting the configured zones. The amount of time the
balancer takes to complete depends on several factors, including
number of shards, available memory, and
<span class="leafygreen-ui-vm4wms" tabindex="0">
IOPS
</span>
.
</p>
<p class="leafygreen-ui-1kp3ins">
When balancing finishes:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Chunks for documents in the
<code class="leafygreen-ui-1l06pbn">
manyIndexes
</code>
collection reside on
<code class="leafygreen-ui-1l06pbn">
shard0
</code>
and
<code class="leafygreen-ui-1l06pbn">
shard2
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Chunks for documents in the
<code class="leafygreen-ui-1l06pbn">
bigData
</code>
collection reside on
<code class="leafygreen-ui-1l06pbn">
shard1
</code>
and
<code class="leafygreen-ui-1l06pbn">
shard2
</code>
.
</p>
</li>
</ul>
</section>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Learn More
<a class="headerlink leafygreen-ui-1kepx47" href="#learn-more" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="learn-more">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To learn more about sharding and balancing, see the following pages:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharding-data-partitioning/#std-label-sharding-data-partitioning">
Data Partitioning with Chunks
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/index-hashed/#std-label-index-type-hashed">
Hashed Indexes
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/manage-shard-zone/#std-label-sharding-manage-zones">
Manage Shard Zones
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/sharded-cluster-components/#std-label-sharding-shards">
Sharded Cluster Components
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/tutorial/configure-replica-set-secondary-sync-target/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Configure a Self-Managed Secondary's Sync Target
<a class="headerlink leafygreen-ui-1kepx47" href="#configure-a-self-managed-secondary-s-sync-target" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="configure-a-self-managed-secondary-s-sync-target">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#overview" target="_self">
<span>
Overview
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#considerations" target="_self">
<span>
Considerations
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#procedure" target="_self">
<span>
Procedure
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Overview
<a class="headerlink leafygreen-ui-1kepx47" href="#overview" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="overview">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Secondaries capture data from the primary member to maintain an up to date
copy of the sets' data. However, by default secondaries may automatically
change their sync targets to secondary members based on changes in the
ping time between members and the state of other members' replication. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/replica-set-sync/">
Replica Set Data Synchronization
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/manage-chained-replication/">
Self-Managed Chained Replication
</a>
for more information.
</p>
<p class="leafygreen-ui-1kp3ins">
For some deployments, implementing a custom replication sync topology may
be more effective than the default sync target selection logic. MongoDB
provides the ability to specify a host to use as a sync target.
</p>
<p class="leafygreen-ui-1kp3ins">
To temporarily override the default sync target selection logic, you
may manually configure a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-secondary">
secondary
</a>
member's sync target to
temporarily pull
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-oplog">
oplog
</a>
entries. The following provide access to
this functionality:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/replSetSyncFrom/#mongodb-dbcommand-dbcmd.replSetSyncFrom">
<code class="leafygreen-ui-1l06pbn">
replSetSyncFrom
</code>
</a>
command, or
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/rs.syncFrom/#mongodb-method-rs.syncFrom">
<code class="leafygreen-ui-1l06pbn">
rs.syncFrom()
</code>
</a>
helper in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Considerations
<a class="headerlink leafygreen-ui-1kepx47" href="#considerations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="considerations">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Sync Logic
<a class="headerlink leafygreen-ui-1kepx47" href="#sync-logic" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="sync-logic">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If an initial sync operation is in progress when you run
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/replSetSyncFrom/#mongodb-dbcommand-dbcmd.replSetSyncFrom">
<code class="leafygreen-ui-1l06pbn">
replSetSyncFrom
</code>
/
</a>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/rs.syncFrom/#mongodb-method-rs.syncFrom">
<code class="leafygreen-ui-1l06pbn">
rs.syncFrom()
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/replSetSyncFrom/#mongodb-dbcommand-dbcmd.replSetSyncFrom">
<code class="leafygreen-ui-1l06pbn">
replSetSyncFrom
</code>
/
</a>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/rs.syncFrom/#mongodb-method-rs.syncFrom">
<code class="leafygreen-ui-1l06pbn">
rs.syncFrom()
</code>
</a>
stops the in-progress initial sync and
restarts the sync process with the new target.
</p>
<p class="leafygreen-ui-1kp3ins">
Only modify the default sync logic as needed, and always exercise
caution.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Target
<a class="headerlink leafygreen-ui-1kepx47" href="#target" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="target">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The member to sync from must be a valid source for data in the set.
To sync from a member, the member must:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Have data. It cannot be an arbiter, in startup or recovering mode, and
must be able to answer data queries.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Be accessible.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Be a member of the same set in the replica set configuration.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Build indexes with the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/#mongodb-rsconf-rsconf.members-n-.buildIndexes">
<code class="leafygreen-ui-1l06pbn">
members[n].buildIndexes
</code>
</a>
setting.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A different member of the set, to prevent syncing from itself.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
If you attempt to replicate from a member that is more than 10 seconds
behind the current member,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
will log a warning but will
still replicate from the lagging member. See also
<a class="leafygreen-ui-tqgtui" href="/docs/manual/replication/#std-label-replication-flow-control">
Replication Lag and Flow Control
<!-- -->
.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Persistence
<a class="headerlink leafygreen-ui-1kepx47" href="#persistence" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="persistence">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/replSetSyncFrom/#mongodb-dbcommand-dbcmd.replSetSyncFrom">
<code class="leafygreen-ui-1l06pbn">
replSetSyncFrom
</code>
/
</a>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/rs.syncFrom/#mongodb-method-rs.syncFrom">
<code class="leafygreen-ui-1l06pbn">
rs.syncFrom()
</code>
</a>
provide a temporary override of default behavior.
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
will revert to the default sync behavior in the
following situations:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instance restarts.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The connection between the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
and the sync target
closes.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
If the sync target falls more than 30 seconds behind another
member of the replica set.
</p>
</li>
</ul>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Procedure
<a class="headerlink leafygreen-ui-1kepx47" href="#procedure" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="procedure">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/replSetSyncFrom/#mongodb-dbcommand-dbcmd.replSetSyncFrom">
<code class="leafygreen-ui-1l06pbn">
replSetSyncFrom
</code>
</a>
command in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
:
</span>
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.adminCommand( { replSetSyncFrom: \"hostname<:port>\" } );","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">adminCommand</span>( <!-- -->{ <span class="lg-highlight-attr">replSetSyncFrom</span>: <span class="lg-highlight-string">"hostname<:port>"</span> } )<!-- -->;</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/rs.syncFrom/#mongodb-method-rs.syncFrom">
<code class="leafygreen-ui-1l06pbn">
rs.syncFrom()
</code>
</a>
helper in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
:
</span>
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"rs.syncFrom(\"hostname<:port>\");","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">rs.<span class="lg-highlight-title lg-highlight-function">syncFrom</span>(<span class="lg-highlight-string">"hostname<:port>"</span>)<!-- -->;</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/csfle/reference/supported-operations/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Supported Operations for Automatic Encryption
<a class="headerlink leafygreen-ui-1kepx47" href="#supported-operations-for-automatic-encryption" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="supported-operations-for-automatic-encryption">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#supported-read-and-write-commands" target="_self">
<span>
Supported Read and Write Commands
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#supported-query-operators" target="_self">
<span>
Supported Query Operators
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#unsupported-insert-operations" target="_self">
<span>
Unsupported Insert Operations
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#supported-update-operators" target="_self">
<span>
Supported Update Operators
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#supported-aggregation-stages" target="_self">
<span>
Supported Aggregation Stages
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#-group-behavior" target="_self">
<span>
<code class="css-1kekw28 e1wawog0">
$group
</code>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#-lookup-and--graphlookup-behavior" target="_self">
<span>
<code class="css-1kekw28 e1wawog0">
$lookup
</code>
and
<code class="css-1kekw28 e1wawog0">
$graphLookup
</code>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#supported-aggregation-expressions" target="_self">
<span>
Supported Aggregation Expressions
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#unsupported-field-types" target="_self">
<span>
Unsupported Field Types
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
This page documents the specific commands, query operators, update
operators, aggregation stages, and aggregation expressions supported by
drivers configured for automatic Client-Side Field Level Encryption.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-csfle-commands-supported-automatic-encryption">
</span>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Supported Read and Write Commands
<a class="headerlink leafygreen-ui-1kepx47" href="#supported-read-and-write-commands" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="supported-read-and-write-commands">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Drivers using automatic Client-Side Field Level Encryption support the following commands:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/aggregate/#mongodb-dbcommand-dbcmd.aggregate">
<code class="leafygreen-ui-1l06pbn">
aggregate
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/count/#mongodb-dbcommand-dbcmd.count">
<code class="leafygreen-ui-1l06pbn">
count
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/delete/#mongodb-dbcommand-dbcmd.delete">
<code class="leafygreen-ui-1l06pbn">
delete
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/distinct/#mongodb-dbcommand-dbcmd.distinct">
<code class="leafygreen-ui-1l06pbn">
distinct
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/explain/#mongodb-dbcommand-dbcmd.explain">
<code class="leafygreen-ui-1l06pbn">
explain
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/find/#mongodb-dbcommand-dbcmd.find">
<code class="leafygreen-ui-1l06pbn">
find
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/findAndModify/#mongodb-dbcommand-dbcmd.findAndModify">
<code class="leafygreen-ui-1l06pbn">
findAndModify
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/insert/#mongodb-dbcommand-dbcmd.insert">
<code class="leafygreen-ui-1l06pbn">
insert
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/update/#mongodb-dbcommand-dbcmd.update">
<code class="leafygreen-ui-1l06pbn">
update
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For any supported command, drivers return an error if the command uses
an unsupported operator, aggregation stage, or aggregation expression.
For a complete list of the supported operators, stages, and expressions,
see the following sections of this page:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-csfle-supported-query-operators" target="_self">
<span>
Supported Query Operators
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-csfle-supported-update-operators" target="_self">
<span>
Supported Update Operators
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-csfle-supported-aggregation-stages" target="_self">
<span>
Supported Aggregation Stages
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-csfle-supported-aggregation-expressions" target="_self">
<span>
Supported Aggregation Expressions
</span>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
The following commands do not require automatic encryption. Drivers
configured for automatic Client-Side Field Level Encryption pass these commands directly to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
:
</a>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/getMore/#mongodb-dbcommand-dbcmd.getMore">
<code class="leafygreen-ui-1l06pbn">
getMore
</code>
</a>
<a class="footnote-reference header-buffer" href="#footnote-1" id="ref-id1">
[
<!-- -->
1
<!-- -->
]
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/authenticate/#mongodb-dbcommand-dbcmd.authenticate">
<code class="leafygreen-ui-1l06pbn">
authenticate
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/hello/#mongodb-dbcommand-dbcmd.hello">
<code class="leafygreen-ui-1l06pbn">
hello
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/logout/#mongodb-dbcommand-dbcmd.logout">
<code class="leafygreen-ui-1l06pbn">
logout
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/abortTransaction/#mongodb-dbcommand-dbcmd.abortTransaction">
<code class="leafygreen-ui-1l06pbn">
abortTransaction
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/commitTransaction/#mongodb-dbcommand-dbcmd.commitTransaction">
<code class="leafygreen-ui-1l06pbn">
commitTransaction
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/endSessions/#mongodb-dbcommand-dbcmd.endSessions">
<code class="leafygreen-ui-1l06pbn">
endSessions
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/startSession/#mongodb-dbcommand-dbcmd.startSession">
<code class="leafygreen-ui-1l06pbn">
startSession
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/create/#mongodb-dbcommand-dbcmd.create">
<code class="leafygreen-ui-1l06pbn">
create
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/createIndexes/#mongodb-dbcommand-dbcmd.createIndexes">
<code class="leafygreen-ui-1l06pbn">
createIndexes
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/drop/#mongodb-dbcommand-dbcmd.drop">
<code class="leafygreen-ui-1l06pbn">
drop
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/dropDatabase/#mongodb-dbcommand-dbcmd.dropDatabase">
<code class="leafygreen-ui-1l06pbn">
dropDatabase
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/dropIndexes/#mongodb-dbcommand-dbcmd.dropIndexes">
<code class="leafygreen-ui-1l06pbn">
dropIndexes
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/killCursors/#mongodb-dbcommand-dbcmd.killCursors">
<code class="leafygreen-ui-1l06pbn">
killCursors
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/listCollections/#mongodb-dbcommand-dbcmd.listCollections">
<code class="leafygreen-ui-1l06pbn">
listCollections
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/listDatabases/#mongodb-dbcommand-dbcmd.listDatabases">
<code class="leafygreen-ui-1l06pbn">
listDatabases
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/listIndexes/#mongodb-dbcommand-dbcmd.listIndexes">
<code class="leafygreen-ui-1l06pbn">
listIndexes
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/renameCollection/#mongodb-dbcommand-dbcmd.renameCollection">
<code class="leafygreen-ui-1l06pbn">
renameCollection
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/ping/#mongodb-dbcommand-dbcmd.ping">
<code class="leafygreen-ui-1l06pbn">
ping
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Issuing any other
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/#std-label-database-commands">
command
</a>
through a driver
configured for automatic Client-Side Field Level Encryption returns an error.
</p>
<table class="header-buffer leafygreen-ui-rbqgrl" frame="void" id="footnote-1" rules="none">
<colgroup>
<col/>
</colgroup>
<tbody valign="top">
<tr>
<td class="leafygreen-ui-17r2xs0">
[
<a href="#ref-id1">
1
</a>
]
</td>
<td class="leafygreen-ui-17r2xs0">
<!-- -->
While automatic Client-Side Field Level Encryption (CSFLE) does not encrypt the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/getMore/#mongodb-dbcommand-dbcmd.getMore">
<code class="leafygreen-ui-1l06pbn">
getMore
</code>
</a>
command, the response to the command may contain
encrypted field values.
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
Applications configured with the correct CSFLE options
automatically decrypt those values.
</li>
<li class="leafygreen-ui-d7p7b6">
Applications without the correct CSFLE options only see
the encrypted values.
</li>
</ul>
</td>
</tr>
</tbody>
</table>
<span class="leafygreen-ui-1qnjd6d" id="std-label-csfle-supported-query-operators">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Supported Query Operators
<a class="headerlink leafygreen-ui-1kepx47" href="#supported-query-operators" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="supported-query-operators">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Drivers configured for automatic Client-Side Field Level Encryption allow the following query
operators when issued against
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/csfle/fundamentals/encryption-algorithms/#std-label-csfle-deterministic-encryption">
deterministically encrypted
</a>
fields:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/eq/#mongodb-query-op.-eq">
<code class="leafygreen-ui-1l06pbn">
$eq
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/ne/#mongodb-query-op.-ne">
<code class="leafygreen-ui-1l06pbn">
$ne
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/in/#mongodb-query-op.-in">
<code class="leafygreen-ui-1l06pbn">
$in
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/nin/#mongodb-query-op.-nin">
<code class="leafygreen-ui-1l06pbn">
$nin
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/and/#mongodb-query-op.-and">
<code class="leafygreen-ui-1l06pbn">
$and
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/or/#mongodb-query-op.-or">
<code class="leafygreen-ui-1l06pbn">
$or
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/not/#mongodb-query-op.-not">
<code class="leafygreen-ui-1l06pbn">
$not
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/nor/#mongodb-query-op.-nor">
<code class="leafygreen-ui-1l06pbn">
$nor
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Queries that compare an encrypted field to
<code class="leafygreen-ui-1l06pbn">
null
</code>
or a regular
expression always return an error even when using a supported query
operator. Queries issuing these operators against a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/csfle/fundamentals/encryption-algorithms/#std-label-csfle-random-encryption">
randomly
encrypted
</a>
field return an error.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/exists/#mongodb-query-op.-exists">
<code class="leafygreen-ui-1l06pbn">
$exists
</code>
</a>
operator has normal behavior when issued against
both deterministically and randomly encrypted fields.
</p>
<p class="leafygreen-ui-1kp3ins">
Queries specifying any other query operator against an encrypted field
return an error.
</p>
<p class="leafygreen-ui-1kp3ins">
The following query operators return an error
<em>
even if
</em>
not issued
against an encrypted field:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/text/#mongodb-query-op.-text">
<code class="leafygreen-ui-1l06pbn">
$text
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/where/#mongodb-query-op.-where">
<code class="leafygreen-ui-1l06pbn">
$where
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/jsonSchema/#mongodb-query-op.-jsonSchema">
<code class="leafygreen-ui-1l06pbn">
$jsonSchema
</code>
</a>
</p>
</li>
</ul>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
Unexpected Behavior with BinData
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
MongoDB stores client-side field level encrypted fields as a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json-v1/#mongodb-bsontype-data_binary">
<code class="leafygreen-ui-1l06pbn">
BinData
</code>
</a>
blob. Read and write operations
issued against the encrypted
<code class="leafygreen-ui-1l06pbn">
BinData
</code>
value may have unexpected or
incorrect behavior as compared to issuing that same operation against
the decrypted value. Certain operations have strict BSON type support
where issuing them against a
<code class="leafygreen-ui-1l06pbn">
BinData
</code>
value returns an error.
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Drivers using automatic Client-Side Field Level Encryption parse read and write operations
for operators or expressions that do not support
<code class="leafygreen-ui-1l06pbn">
BinData
</code>
values
<em>
or
</em>
that have unexpected behavior when issued against
<code class="leafygreen-ui-1l06pbn">
BinData
</code>
values.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Applications using explicit (manual) Client-Side Field Level Encryption
<em>
may
</em>
use this page
as guidance for issuing read and write operations against encrypted
fields.
</p>
</li>
</ul>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-csfle-supported-insert-operation">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Unsupported Insert Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#unsupported-insert-operations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="unsupported-insert-operations">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Drivers configured for automatic Client-Side Field Level Encryption do
<em>
not
</em>
support insert
commands with the following behavior:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Inserting a document with
<code class="leafygreen-ui-1l06pbn">
Timestamp(0,0)
</code>
associated to an
encrypted field. The
<code class="leafygreen-ui-1l06pbn">
(0,0)
</code>
value indicates that the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
should generate the Timestamp. When the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
cannot generated encrypted fields, the resulting
timestamp is unencrypted.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Inserting a document without an encrypted
<code class="leafygreen-ui-1l06pbn">
_id
</code>
<em>
if
</em>
the configured
automatic schema specifies an encrypted
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field. When the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
automatically generates an unencrypted
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-objectid">
ObjectId
</a>
, omitting
<code class="leafygreen-ui-1l06pbn">
_id
</code>
from documents results in
documents that do not conform to the automatic encryption rules.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Inserting a document with an array associated to a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/csfle/fundamentals/encryption-algorithms/#std-label-csfle-deterministic-encryption">
deterministically encrypted
</a>
field. Automatic Client-Side Field Level Encryption does not support deterministically
encrypting arrays.
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-csfle-supported-update-operators">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Supported Update Operators
<a class="headerlink leafygreen-ui-1kepx47" href="#supported-update-operators" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="supported-update-operators">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Drivers configured for automatic Client-Side Field Level Encryption allow the following update
operators when issued against
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/csfle/fundamentals/encryption-algorithms/#std-label-csfle-deterministic-encryption">
deterministically encrypted
</a>
fields:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/set/#mongodb-update-up.-set">
<code class="leafygreen-ui-1l06pbn">
$set
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/unset/#mongodb-update-up.-unset">
<code class="leafygreen-ui-1l06pbn">
$unset
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/rename/#mongodb-update-up.-rename">
<code class="leafygreen-ui-1l06pbn">
$rename
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
When you use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/update/rename/#mongodb-update-up.-rename">
<code class="leafygreen-ui-1l06pbn">
$rename
</code>
</a>
operator on encrypted fields, the
automatic JSON schema must specify the same encryption metadata for the
source and target field names.
</p>
<p class="leafygreen-ui-1kp3ins">
Updates specifying any other update operator against an encrypted field
return an error.
</p>
<p class="leafygreen-ui-1kp3ins">
Update operations with the following behavior return an error
<em>
even if
</em>
using a supported operator:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The update operation produces an array inside of an encrypted path.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The update operation uses aggregation expression syntax.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For update operations specifying a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/update/#std-label-update-command-q">
query filter
</a>
on deterministically encrypted fields, the query
filter must use only
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-csfle-supported-query-operators" target="_self">
<span>
supported operators
</span>
</a>
on those fields.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-csfle-supported-aggregation-stages">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Supported Aggregation Stages
<a class="headerlink leafygreen-ui-1kepx47" href="#supported-aggregation-stages" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="supported-aggregation-stages">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Drivers configured for automatic Client-Side Field Level Encryption support the following
aggregation pipeline stages:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/addFields/#mongodb-pipeline-pipe.-addFields">
<code class="leafygreen-ui-1l06pbn">
$addFields
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/bucket/#mongodb-pipeline-pipe.-bucket">
<code class="leafygreen-ui-1l06pbn">
$bucket
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/bucketAuto/#mongodb-pipeline-pipe.-bucketAuto">
<code class="leafygreen-ui-1l06pbn">
$bucketAuto
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/collStats/#mongodb-pipeline-pipe.-collStats">
<code class="leafygreen-ui-1l06pbn">
$collStats
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/count/#mongodb-pipeline-pipe.-count">
<code class="leafygreen-ui-1l06pbn">
$count
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/geoNear/#mongodb-pipeline-pipe.-geoNear">
<code class="leafygreen-ui-1l06pbn">
$geoNear
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
(For usage requirements, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-csfle-group-behavior" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$group
</code>
Behavior
<!-- -->
)
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/indexStats/#mongodb-pipeline-pipe.-indexStats">
<code class="leafygreen-ui-1l06pbn">
$indexStats
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/limit/#mongodb-pipeline-pipe.-limit">
<code class="leafygreen-ui-1l06pbn">
$limit
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lookup/#mongodb-pipeline-pipe.-lookup">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/graphLookup/#mongodb-pipeline-pipe.-graphLookup">
<code class="leafygreen-ui-1l06pbn">
$graphLookup
</code>
</a>
(For usage
requirements, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-csfle-lookup-graphLookup-behavior" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
and
<code class="leafygreen-ui-1l06pbn">
$graphLookup
</code>
Behavior
<!-- -->
)
</span>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/match/#mongodb-pipeline-pipe.-match">
<code class="leafygreen-ui-1l06pbn">
$match
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/project/#mongodb-pipeline-pipe.-project">
<code class="leafygreen-ui-1l06pbn">
$project
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/redact/#mongodb-pipeline-pipe.-redact">
<code class="leafygreen-ui-1l06pbn">
$redact
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/replaceRoot/#mongodb-pipeline-pipe.-replaceRoot">
<code class="leafygreen-ui-1l06pbn">
$replaceRoot
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/sample/#mongodb-pipeline-pipe.-sample">
<code class="leafygreen-ui-1l06pbn">
$sample
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/skip/#mongodb-pipeline-pipe.-skip">
<code class="leafygreen-ui-1l06pbn">
$skip
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/sort/#mongodb-pipeline-pipe.-sort">
<code class="leafygreen-ui-1l06pbn">
$sort
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/sortByCount/#mongodb-pipeline-pipe.-sortByCount">
<code class="leafygreen-ui-1l06pbn">
$sortByCount
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/unwind/#mongodb-pipeline-pipe.-unwind">
<code class="leafygreen-ui-1l06pbn">
$unwind
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Pipelines operating on collections configured for automatic encryption
that specify any other stage return an error.
</p>
<p class="leafygreen-ui-1kp3ins">
For each supported pipeline stage, MongoDB tracks fields that
<em>
must
</em>
be encrypted as they pass through the supported pipelines and
marks them for encryption.
</p>
<p class="leafygreen-ui-1kp3ins">
Each supported stage must specify only supported
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-csfle-supported-query-operators" target="_self">
<span>
query operators
</span>
</a>
and
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-csfle-supported-aggregation-expressions" target="_self">
<span>
aggregation expressions
<!-- -->
.
</span>
</a>
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-csfle-group-behavior">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#-group-behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-group-behavior">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
has the following behaviors specific to Client-Side Field Level Encryption:
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
supports:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Grouping on deterministically encrypted fields.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Using
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/addToSet/#mongodb-group-grp.-addToSet">
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/push/#mongodb-group-grp.-push">
<code class="leafygreen-ui-1l06pbn">
$push
</code>
</a>
accumulators on
encrypted fields.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
$group does not support:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Matching on the array returned by
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/addToSet/#mongodb-group-grp.-addToSet">
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/push/#mongodb-group-grp.-push">
<code class="leafygreen-ui-1l06pbn">
$push
</code>
</a>
accumulators.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Arithmetic accumulators on encrypted fields.
</p>
</li>
</ul>
<span class="leafygreen-ui-1qnjd6d" id="std-label-csfle-lookup-graphLookup-behavior">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
and
<code class="leafygreen-ui-1l06pbn">
$graphLookup
</code>
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#-lookup-and--graphlookup-behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-lookup-and--graphlookup-behavior">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Automatic Client-Side Field Level Encryption supports the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lookup/#mongodb-pipeline-pipe.-lookup">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/graphLookup/#mongodb-pipeline-pipe.-graphLookup">
<code class="leafygreen-ui-1l06pbn">
$graphLookup
</code>
</a>
<em>
only if
</em>
the
<code class="leafygreen-ui-1l06pbn">
from
</code>
collection matches the
collection on which the aggregation runs against (specifically,
self-lookup operations).
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lookup/#mongodb-pipeline-pipe.-lookup">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/graphLookup/#mongodb-pipeline-pipe.-graphLookup">
<code class="leafygreen-ui-1l06pbn">
$graphLookup
</code>
</a>
stages that
reference a different
<code class="leafygreen-ui-1l06pbn">
from
</code>
collection return an error.
</p>
<p class="leafygreen-ui-1kp3ins">
You cannot perform a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/lookup/#mongodb-pipeline-pipe.-lookup">
<code class="leafygreen-ui-1l06pbn">
$lookup
</code>
</a>
from a CSFLE-enabled
<code class="leafygreen-ui-1l06pbn">
MongoClient
</code>
on unencrypted collections.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-csfle-supported-aggregation-expressions">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Supported Aggregation Expressions
<a class="headerlink leafygreen-ui-1kepx47" href="#supported-aggregation-expressions" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="supported-aggregation-expressions">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Drivers configured for automatic Client-Side Field Level Encryption allow aggregation stages
using the following expressions against
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/csfle/fundamentals/encryption-algorithms/#std-label-csfle-deterministic-encryption">
deterministically
encrypted
</a>
fields:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/cond/#mongodb-expression-exp.-cond">
<code class="leafygreen-ui-1l06pbn">
$cond
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/eq/#mongodb-expression-exp.-eq">
<code class="leafygreen-ui-1l06pbn">
$eq
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/ifNull/#mongodb-expression-exp.-ifNull">
<code class="leafygreen-ui-1l06pbn">
$ifNull
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/in/#mongodb-expression-exp.-in">
<code class="leafygreen-ui-1l06pbn">
$in
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/let/#mongodb-expression-exp.-let">
<code class="leafygreen-ui-1l06pbn">
$let
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/literal/#mongodb-expression-exp.-literal">
<code class="leafygreen-ui-1l06pbn">
$literal
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/ne/#mongodb-expression-exp.-ne">
<code class="leafygreen-ui-1l06pbn">
$ne
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/switch/#mongodb-expression-exp.-switch">
<code class="leafygreen-ui-1l06pbn">
$switch
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
All other aggregation expressions return an error if issued against
encrypted fields.
</p>
<p class="leafygreen-ui-1kp3ins">
Aggregation stages with the following behavior return an error
<em>
even if
</em>
using a supported aggregation expression:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:10%"/>
<col style="width:30%"/>
<col style="width:60%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Expressions
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Rejected Behavior
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Example
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/cond/#mongodb-expression-exp.-cond">
<code class="leafygreen-ui-1l06pbn">
$cond
</code>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/switch/#mongodb-expression-exp.-switch">
<code class="leafygreen-ui-1l06pbn">
$switch
</code>
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The expression specifies a field whose encryption properties
cannot be known until runtime
<em>
and
</em>
a subsequent aggregation
stage includes an expression referencing that field.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"$addFields : {\n \"valueWithUnknownEncryption\" : {\n $cond : {\n if : { \"$encryptedField\" : \"value\" },\n then : \"$encryptedField\",\n else: \"unencryptedValue\"\n }\n }\n},\n{\n $match : {\n \"valueWithUnknownEncryption\" : \"someNewValue\"\n }\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">$addFields<!-- --> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"valueWithUnknownEncryption"</span> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->$cond<!-- --> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">if</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"$encryptedField"</span> <!-- -->: <span class="lg-highlight-string">"value"</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->then <!-- -->: <span class="lg-highlight-string">"$encryptedField"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">else</span>: <span class="lg-highlight-string">"unencryptedValue"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->$match<!-- --> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"valueWithUnknownEncryption"</span> <!-- -->: <span class="lg-highlight-string">"someNewValue"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/eq/#mongodb-expression-exp.-eq">
<code class="leafygreen-ui-1l06pbn">
$eq
</code>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/ne/#mongodb-expression-exp.-ne">
<code class="leafygreen-ui-1l06pbn">
$ne
</code>
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The expression creates a new field that references an
encrypted field
<em>
and
</em>
operates on that new field in the same
expression.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n $eq : [\n {\"newField\" : \"$encryptedField\"},\n {\"newField\" : \"value\"\n ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->$eq<!-- --> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{<span class="lg-highlight-string">"newField"</span> <!-- -->: <span class="lg-highlight-string">"$encryptedField"</span>}<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{<span class="lg-highlight-string">"newField"</span> <!-- -->: <span class="lg-highlight-string">"value"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/eq/#mongodb-expression-exp.-eq">
<code class="leafygreen-ui-1l06pbn">
$eq
</code>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/ne/#mongodb-expression-exp.-ne">
<code class="leafygreen-ui-1l06pbn">
$ne
</code>
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The expression references the prefix of an encrypted field
within the comparison expression.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $eq : [ \"$prefixOfEncryptedField\" , \"value\"] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1agdxuk" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <!-- -->$eq<!-- --> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"$prefixOfEncryptedField"</span> <!-- -->, <span class="lg-highlight-string">"value"</span>] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/eq/#mongodb-expression-exp.-eq">
<code class="leafygreen-ui-1l06pbn">
$eq
</code>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/ne/#mongodb-expression-exp.-ne">
<code class="leafygreen-ui-1l06pbn">
$ne
</code>
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The result of the expression is compared to an encrypted field.
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n $eq : [\n \"$encryptedField\" ,\n { $ne : [ \"field\", \"value\" ] }\n ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->$eq<!-- --> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"$encryptedField"</span> <!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <!-- -->$ne<!-- --> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"field"</span>, <span class="lg-highlight-string">"value"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/let/#mongodb-expression-exp.-let">
<code class="leafygreen-ui-1l06pbn">
$let
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
The expression binds a variable to an encrypted
field or attempts to rebind
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/aggregation-variables/#mongodb-variable-variable.CURRENT">
<code class="leafygreen-ui-1l06pbn">
$$CURRENT
</code>
.
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n $let: {\n \"vars\" : {\n \"newVariable\" : \"$encryptedField\"\n }\n }\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$let</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"vars"</span> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"newVariable"</span> <!-- -->: <span class="lg-highlight-string">"$encryptedField"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/in/#mongodb-expression-exp.-in">
<code class="leafygreen-ui-1l06pbn">
$in
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
The first argument to the expression
<em>
is
</em>
an encrypted field,
<em>
and
</em>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The second argument to the expression is
<em>
not
</em>
an array literal
</p>
<p class="leafygreen-ui-1kp3ins">
<em>
-OR-
</em>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The second argument to the expression is an encrypted field.
</p>
</li>
</ul>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n $in : [\n \"$encryptedField\" ,\n \"$otherEncryptedField\"\n ]\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->$in<!-- --> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"$encryptedField"</span> <!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"$otherEncryptedField"</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Unsupported Field Types
<a class="headerlink leafygreen-ui-1kepx47" href="#unsupported-field-types" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="unsupported-field-types">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Drivers configured for automatic Client-Side Field Level Encryption (CSFLE) do
<em>
not
</em>
support any
read or write operation that requires encrypting the following value
types:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-MaxKey">
<code class="leafygreen-ui-1l06pbn">
MaxKey
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/mongodb-extended-json/#mongodb-bsontype-MinKey">
<code class="leafygreen-ui-1l06pbn">
MinKey
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
null
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
undefined
</code>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Encryption does not adequately hide the type information for these
values.
</p>
<p class="leafygreen-ui-1kp3ins">
CSFLE does not support automatic encryption on fields within an
array of documents.
</p>
<p class="leafygreen-ui-1kp3ins">
Automatic CSFLE
<em>
also
</em>
does not support read or write operations on a
deterministically encrypted field where the operation compares the
encrypted field to the following value types:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
array
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
bool
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
decimal128
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
double
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
object
</code>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/audit-message/mongo/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
mongo Schema Audit Messages
<a class="headerlink leafygreen-ui-1kepx47" href="#mongo-schema-audit-messages" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongo-schema-audit-messages">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#audit-event-actions--details--and-results" target="_self">
<span>
Audit Event Actions, Details, and Results
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
In the
<code class="leafygreen-ui-1l06pbn">
mongo
</code>
schema, recorded log messages have this syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n atype: <string>,\n ts : { $date: <timestamp> },\n uuid : { $binary: <string>, $type: <string> },\n local: { ip: <string>, port: <int> || isSystemUser: <boolean> || unix: <string> },\n remote: { ip: <string>, port: <int> || isSystemUser: <boolean> || unix: <string> },\n users : [ { user: <string>, db: <string> }, ... ],\n roles: [ { role: <string>, db: <string> }, ... ],\n param: <document>,\n result: <int>\n}"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> atype: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ts : { $date: <timestamp> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> uuid : { $binary: <string>, $type: <string> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> local: { ip: <string>, port: <int> || isSystemUser: <boolean> || unix: <string> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> remote: { ip: <string>, port: <int> || isSystemUser: <boolean> || unix: <string> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> users : [ { user: <string>, db: <string> }, ... ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> roles: [ { role: <string>, db: <string> }, ... ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> param: <document>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> result: <int></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
atype
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
string
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Action type. See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-audit-action-details-results" target="_self">
<span>
Audit Event Actions, Details, and Results
<!-- -->
.
</span>
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ts
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Document that contains the date and UTC time of the event, in ISO
8601 format.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-message-uuid">
</span>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
uuid
</code>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
A document that contains a message identifier.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<span class="leafygreen-ui-vm4wms" tabindex="0">
UUID
</span>
identifies a
client connection. Use the UUID to track audit events connected
to that client.
</p>
<p class="leafygreen-ui-1kp3ins">
The value of the
<code class="leafygreen-ui-1l06pbn">
$type
</code>
field is
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/bson-types/#std-label-bson-types">
BSON type
</a>
<code class="leafygreen-ui-1l06pbn">
04
</code>
which indicates that the
<code class="leafygreen-ui-1l06pbn">
$binary
</code>
field contains a
UUID.
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-message-local">
</span>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
local
</code>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
A document that contains the
<code class="leafygreen-ui-1l06pbn">
ip
</code>
address and the
<code class="leafygreen-ui-1l06pbn">
port
</code>
number of the running instance.
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0, can alternatively be a document with one of
these fields:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
isSystemUser
</code>
that indicates whether the user who
caused the event was a system user. Logged for self-referential jobs
initiated by a background process that runs on the same server
instance.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
unix
</code>
that contains the MongoDB socket file path if the client
connects through a Unix domain socket.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0, the
<code class="leafygreen-ui-1l06pbn">
local
</code>
field is deprecated.
Use the
<code class="leafygreen-ui-1l06pbn">
localEndpoint
</code>
field in the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-audit-message-clientMetadata" target="_self">
<span>
clientMetadata
</span>
</a>
audit message instead.
</p>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
remote
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
A document that contains the
<code class="leafygreen-ui-1l06pbn">
ip
</code>
address and the
<code class="leafygreen-ui-1l06pbn">
port
</code>
number of the incoming connection associated with the event.
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0, can alternatively be a document with one of
these fields:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
isSystemUser
</code>
that indicates whether the user who
caused the event was a system user. Logged for self-referential jobs
initiated by a background process that runs on the same server
instance.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
unix
</code>
that contains the MongoDB socket file path if the client
connects through a Unix domain socket.
</p>
</li>
</ul>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
users
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Array of user identification documents. Because MongoDB allows a
session to log in with different user per database, this array can
have more than one user. Each document contains a
<code class="leafygreen-ui-1l06pbn">
user
</code>
field for
the username and a
<code class="leafygreen-ui-1l06pbn">
db
</code>
field for the authentication database for
that user.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
roles
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
array
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Array of documents that specify the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/authorization/">
roles
</a>
granted to the user. Each document contains a
<code class="leafygreen-ui-1l06pbn">
role
</code>
field for the name of the role and a
<code class="leafygreen-ui-1l06pbn">
db
</code>
field for the
database associated with the role.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
param
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
document
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Specific details for the event. See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-audit-action-details-results" target="_self">
<span>
Audit Event Actions, Details, and Results
<!-- -->
.
</span>
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
result
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
integer
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Error code. See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-audit-action-details-results" target="_self">
<span>
Audit Event Actions, Details, and Results
<!-- -->
.
</span>
</a>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-action-details-results">
</span>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Audit Event Actions, Details, and Results
<a class="headerlink leafygreen-ui-1kepx47" href="#audit-event-actions--details--and-results" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="audit-event-actions--details--and-results">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following table lists for each
<code class="leafygreen-ui-1l06pbn">
atype
</code>
or action type, the
associated
<code class="leafygreen-ui-1l06pbn">
param
</code>
details and the
<code class="leafygreen-ui-1l06pbn">
result
</code>
values, if any.
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:50%"/>
<col style="width:30%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
<code class="leafygreen-ui-1l06pbn">
atype
</code>
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
<code class="leafygreen-ui-1l06pbn">
param
</code>
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
<code class="leafygreen-ui-1l06pbn">
result
</code>
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-message-authenticate">
</span>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
authenticate
</code>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n user: <user>,\n db: <database>,\n mechanism: <mechanism>\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> user: <user name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> mechanism: <mechanism></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0,
<code class="leafygreen-ui-1l06pbn">
authenticate
</code>
:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Is logged for incomplete authentication attempts.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Includes the principle name and identifier in
<code class="leafygreen-ui-1l06pbn">
mechanism
</code>
for external authentication mechanisms such as
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/security-x.509/#std-label-security-auth-x509">
x.509
</a>
and Amazon Web Services
Identity and Access Management (AWS-IAM) (see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/connection-string-options/#mongodb-urioption-urioption.authMechanism">
<code class="leafygreen-ui-1l06pbn">
authMechanism
</code>
</a>
).
</p>
</li>
</ul>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
<div class="line">
<code class="leafygreen-ui-1l06pbn">
18
</code>
- Authentication Failed
</div>
<div class="line">
<code class="leafygreen-ui-1l06pbn">
334
</code>
- Mechanism Unavailable
</div>
<div class="line">
<code class="leafygreen-ui-1l06pbn">
337
</code>
- Authentication Abandoned
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-message-authCheck">
</span>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
authCheck
</code>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n command: <name>,\n ns: <database>.<collection>,\n args: <command>\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> command: <name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ns: <database>.<collection>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> args: <command object></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<div class="line-block">
<div class="line">
<code class="leafygreen-ui-1l06pbn">
ns
</code>
field is optional.
</div>
<div class="line">
<code class="leafygreen-ui-1l06pbn">
args
</code>
field may be redacted.
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
By default, the auditing system logs only the authorization
failures. To enable the system to log authorization successes,
use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.auditAuthorizationSuccess">
<code class="leafygreen-ui-1l06pbn">
auditAuthorizationSuccess
</code>
</a>
parameter.
</p>
<p class="leafygreen-ui-1kp3ins">
Enabling
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.auditAuthorizationSuccess">
<code class="leafygreen-ui-1l06pbn">
auditAuthorizationSuccess
</code>
</a>
degrades performance
more than logging only the authorization failures.
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0,
<code class="leafygreen-ui-1l06pbn">
authCheck
</code>
is not logged for actions
that are generated internally.
</p>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
<div class="line">
<code class="leafygreen-ui-1l06pbn">
13
</code>
- Unauthorized to perform the operation.
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-message-clientMetadata">
</span>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
clientMetadata
</code>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n localEndpoint : {\n ip : <ip>,\n port : <port>\n } || {\n unix : <mongodb>\n },\n clientMetadata : {\n driver : {\n name : <client>,\n version : <client>\n },\n os : {\n type : <client>,\n name : <client>,\n architecture : <client>,\n version : <client>\n },\n platform : <client>,\n application : {\n name : <client>\n }\n }\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> localEndpoint : {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ip : <IP address of running instance>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> port : <port of running instance></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> } || {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> unix : <MongoDB socket file path if connecting through</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> a Unix domain socket></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> clientMetadata : {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> driver : {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> name : <client driver name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> version : <client driver version></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> os : {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> type : <client operating system type>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> name : <client operating system name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> architecture : <client operating system architecture>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> version : <client operating system version></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> platform : <client platform name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> application : {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> name : <client application name></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Contains the client metadata. Logged when the client runs the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/hello/#mongodb-dbcommand-dbcmd.hello">
<code class="leafygreen-ui-1l06pbn">
hello
</code>
</a>
command.
</p>
<p class="leafygreen-ui-1kp3ins">
For more details, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/log-messages/#std-label-log-messages-client-data">
Client Data
<!-- -->
.
</a>
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-message-createCollection">
</span>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-createCollection">
<code class="leafygreen-ui-1l06pbn">
createCollection
</code>
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n ns: <database>.<collection>,\n viewOn: <database>.<collection>,\n pipeline: [ <pipeline> ]\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ns: <database>.<collection || view>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> viewOn: <database>.<collection>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> pipeline: [ <pipeline definition> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Logged when a:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Collection is created.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/views/#std-label-views-landing-page">
View
</a>
is created, with the view
name logged in the
<code class="leafygreen-ui-1l06pbn">
ns
</code>
field.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0, this additional information is logged for a
view:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
viewOn
</code>
field with the database and collection for the view.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
pipeline
</code>
field with the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/aggregation-pipeline/#std-label-aggregation-pipeline">
aggregation pipeline
</a>
definition
for the view.
</p>
</li>
</ul>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
createDatabase
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ ns: <database> }"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ ns: <database> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-message-createIndex">
</span>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-createIndex">
<code class="leafygreen-ui-1l06pbn">
createIndex
</code>
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n ns: <database>.<collection>,\n indexName: <index>,\n indexSpec: <index>,\n indexBuildState: <index>\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ns: <database>.<collection>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> indexName: <index name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> indexSpec: <index specification>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> indexBuildState: <index build state></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Possible values for
<code class="leafygreen-ui-1l06pbn">
indexBuildState
</code>
are:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
IndexBuildStarted
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
IndexBuildSucceeded
</code>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
IndexBuildAborted
</code>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-createIndex">
<code class="leafygreen-ui-1l06pbn">
createIndex
</code>
</a>
audit events
are:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Logged at the start and end of index creation, and includes a
message indicating if the index was successfully created or
not.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Attributed to the originating user for the action that
caused the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-createIndex">
<code class="leafygreen-ui-1l06pbn">
createIndex
</code>
</a>
audit event.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Logged for a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-createCollection">
<code class="leafygreen-ui-1l06pbn">
createCollection
</code>
</a>
event if the
collection has an index.
</p>
</li>
</ul>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
<div class="line">
<code class="leafygreen-ui-1l06pbn">
276
</code>
- Index build aborted.
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The audit message contains result code
<code class="leafygreen-ui-1l06pbn">
276
</code>
for
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-createIndex">
<code class="leafygreen-ui-1l06pbn">
createIndex
</code>
</a>
audit events with
<code class="leafygreen-ui-1l06pbn">
IndexBuildState
</code>
set to
<code class="leafygreen-ui-1l06pbn">
IndexBuildAborted
</code>
. The audit message contains result
code
<code class="leafygreen-ui-1l06pbn">
0
</code>
for
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-createIndex">
<code class="leafygreen-ui-1l06pbn">
createIndex
</code>
</a>
audit events with
<code class="leafygreen-ui-1l06pbn">
IndexBuildState
</code>
set to
<code class="leafygreen-ui-1l06pbn">
IndexBuildStarted
</code>
or
<code class="leafygreen-ui-1l06pbn">
IndexBuildSucceeded
</code>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-message-directAuthMutation">
</span>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
directAuthMutation
</code>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n document: {\n <collection>\n },\n ns: <database>.<collection>,\n operation: <database>\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> document: {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <collection modifications></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ns: <database>.<collection>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> operation: <database operation></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Logged when a database operation directly modifies the contents
of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data-admin.system.users">
<code class="leafygreen-ui-1l06pbn">
admin.system.users
</code>
</a>
or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data-admin.system.roles">
<code class="leafygreen-ui-1l06pbn">
admin.system.roles
</code>
</a>
collections.
</p>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
renameCollection
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n old: <database>.<collection>,\n new: <database>.<collection>\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> old: <database>.<collection>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> new: <database>.<collection></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-message-dropCollection">
</span>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-dropCollection">
<code class="leafygreen-ui-1l06pbn">
dropCollection
</code>
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n ns: <database>.<collection>,\n viewOn: <database>.<collection>,\n pipeline: [ <pipeline> ]\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ns: <database>.<collection || view>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> viewOn: <database>.<collection>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> pipeline: [ <pipeline definition> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Logged when a:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Collection is dropped.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/views/#std-label-views-landing-page">
View
</a>
is dropped, with the view
name logged in the
<code class="leafygreen-ui-1l06pbn">
ns
</code>
field.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0, this additional information is logged for a
view:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
viewOn
</code>
field with the database and collection for the view.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
pipeline
</code>
field with the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/aggregation-pipeline/#std-label-aggregation-pipeline">
aggregation pipeline
</a>
definition
for the view.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
In addition, starting in MongoDB 5.0, a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-dropCollection">
<code class="leafygreen-ui-1l06pbn">
dropCollection
</code>
</a>
audit event is logged when a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-dropDatabase">
<code class="leafygreen-ui-1l06pbn">
dropDatabase
</code>
</a>
event occurs.
</p>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
<div class="line">
<code class="leafygreen-ui-1l06pbn">
26
</code>
-
<code class="leafygreen-ui-1l06pbn">
NamespaceNotFound
</code>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
If the collection or view does not exist, the audit message shows
the return code as
<code class="leafygreen-ui-1l06pbn">
result: 26
</code>
.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-dropDatabase">
<code class="leafygreen-ui-1l06pbn">
dropDatabase
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ ns: <database> }"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ ns: <database> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-dropIndex">
<code class="leafygreen-ui-1l06pbn">
dropIndex
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n ns: <database>.<collection>,\n indexName: <index>\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ns: <database>.<collection>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> indexName: <index name></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-createUser">
<code class="leafygreen-ui-1l06pbn">
createUser
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n user: <user>,\n db: <database>,\n customData: <document>,\n roles: [\n {\n role: <role>,\n db: <database>\n },\n ...\n ]\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> user: <user name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> customData: <document>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> roles: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
customData
</code>
field is optional.
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-dropUser">
<code class="leafygreen-ui-1l06pbn">
dropUser
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n user: <user>,\n db: <database>\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> user: <user name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
dropAllUsersFromDatabase
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ db: <database> }"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ db: <database> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-message-getClusterParameter">
</span>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
getClusterParameter
</code>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n requestedClusterServerParameters: <parameters>\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> requestedClusterServerParameters: <parameters></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-message-setClusterParameter">
</span>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
setClusterParameter
</code>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n originalClusterServerParameter: <original>,\n updatedClusterServerParameter\": <new>\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> originalClusterServerParameter: <original parameter value>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> updatedClusterServerParameter": <new parameter value></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-message-updateCachedClusterServerParameter">
</span>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
updateCachedClusterServerParameter
</code>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n originalClusterServerParameter: <original>,\n updatedClusterServerParameter\": <new>\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> originalClusterServerParameter: <original parameter value>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> updatedClusterServerParameter": <new parameter value></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Logged when a parameter is changed because of:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Propagation of a
<code class="leafygreen-ui-1l06pbn">
setClusterParameter
</code>
command
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Replication event such as rollback
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
A refresh of new cluster parameter values from the config
server on
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</p>
</li>
</ul>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
updateUser
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n user: <user>,\n db: <database>,\n passwordChanged: <boolean>,\n customData: <document>,\n roles: [\n {\n role: <role>,\n db: <database>\n },\n ...\n ]\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> user: <user name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> passwordChanged: <boolean>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> customData: <document>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> roles: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
customData
</code>
field is optional.
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
grantRolesToUser
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n user: <user>,\n db: <database>,\n roles: [\n {\n role: <role>,\n db: <database>\n },\n ...\n ]\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> user: <user name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> roles: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
revokeRolesFromUser
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n user: <user>,\n db: <database>,\n roles: [\n {\n role: <role>,\n db: <database>\n },\n ...\n ]\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> user: <user name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> roles: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-createRole">
<code class="leafygreen-ui-1l06pbn">
createRole
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n role: <role>,\n db: <database>,\n roles: [\n {\n role: <role>,\n db: <database>\n },\n ...\n ],\n privileges: [\n {\n resource: <resource>,\n actions: [ <action>, ... ]\n },\n ...\n ]\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> roles: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> privileges: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> resource: <resource document>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> actions: [ <action>, ... ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
roles
</code>
and the
<code class="leafygreen-ui-1l06pbn">
privileges
</code>
fields are optional.
</p>
<p class="leafygreen-ui-1kp3ins">
For details on the resource document, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/resource-document/#std-label-resource-document">
Resource Document on Self-Managed Deployments
</a>
.
For a list of actions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#std-label-security-user-actions">
Privilege Actions for Self-Managed Deployments
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
updateRole
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n role: <role>,\n db: <database>,\n roles: [\n {\n role: <role>,\n db: <database>\n },\n ...\n ],\n privileges: [\n {\n resource: <resource>,\n actions: [ <action>, ... ]\n },\n ...\n ]\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> roles: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> privileges: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> resource: <resource document>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> actions: [ <action>, ... ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
roles
</code>
and the
<code class="leafygreen-ui-1l06pbn">
privileges
</code>
fields are optional.
</p>
<p class="leafygreen-ui-1kp3ins">
For details on the resource document, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/resource-document/#std-label-resource-document">
Resource Document on Self-Managed Deployments
</a>
.
For a list of actions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#std-label-security-user-actions">
Privilege Actions for Self-Managed Deployments
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-dropRole">
<code class="leafygreen-ui-1l06pbn">
dropRole
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n role: <role>,\n db: <database>\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
dropAllRolesFromDatabase
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ db: <database> }"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ db: <database> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
grantRolesToRole
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n role: <role>,\n db: <database>,\n roles: [\n {\n role: <role>,\n db: <database>\n },\n ...\n ]\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> roles: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
revokeRolesFromRole
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n role: <role>,\n db: <database>,\n roles: [\n {\n role: <role>,\n db: <database>\n },\n ...\n ]\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> roles: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
grantPrivilegesToRole
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n role: <role>,\n db: <database>,\n privileges: [\n {\n resource: <resource>,\n actions: [ <action>, ... ]\n },\n ...\n ]\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> privileges: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> resource: <resource document>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> actions: [ <action>, ... ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For details on the resource document, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/resource-document/#std-label-resource-document">
Resource Document on Self-Managed Deployments
</a>
.
For a list of actions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#std-label-security-user-actions">
Privilege Actions for Self-Managed Deployments
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
revokePrivilegesFromRole
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n role: <role>,\n db: <database>,\n privileges: [\n {\n resource: <resource>,\n actions: [ <action>, ... ]\n },\n ...\n ]\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> role: <role name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> db: <database name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> privileges: [</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> resource: <resource document>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> actions: [ <action>, ... ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For details on the resource document, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/resource-document/#std-label-resource-document">
Resource Document on Self-Managed Deployments
</a>
.
For a list of actions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#std-label-security-user-actions">
Privilege Actions for Self-Managed Deployments
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
replSetReconfig
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n old: {\n _id: <replicasetname>,\n version: <number>,\n ...\n members: [ ... ],\n settings: { ... }\n },\n new: {\n _id: <replicasetname>,\n version: <number>,\n ...\n members: [ ... ],\n settings: { ... }\n }\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> old: {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> _id: <replicaSetName>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> version: <number>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> members: [ ... ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> settings: { ... }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> },</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> new: {</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> _id: <replicaSetName>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> version: <number>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ...</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> members: [ ... ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> settings: { ... }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For details on the replica set configuration document, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/replica-configuration/">
Self-Managed Replica Set Configuration
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-enableSharding">
<code class="leafygreen-ui-1l06pbn">
enableSharding
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ ns: <database> }"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ ns: <database> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
shardCollection
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n ns: <database>.<collection>,\n key: <shard>,\n options: { unique: <boolean> }\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ns: <database>.<collection>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> key: <shard key pattern>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> options: { unique: <boolean> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-addShard">
<code class="leafygreen-ui-1l06pbn">
addShard
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n shard: <shard>,\n connectionString: <hostname>:<port>,\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> shard: <shard name>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> connectionString: <hostname>:<port>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
When a shard is a replica set, the
<code class="leafygreen-ui-1l06pbn">
connectionString
</code>
includes the
replica set name and can include other members of the replica set.
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-refineCollectionShardKey">
<code class="leafygreen-ui-1l06pbn">
refineCollectionShardKey
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n ns: <database>.<collection>,\n key: <shard>\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ns: <database>.<collection>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> key: <shard key pattern></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-removeShard">
<code class="leafygreen-ui-1l06pbn">
removeShard
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ shard: <shard> }"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ shard: <shard name> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-shutdown">
<code class="leafygreen-ui-1l06pbn">
shutdown
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ }"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Indicates commencement of database shutdown.
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#mongodb-authaction-applicationMessage">
<code class="leafygreen-ui-1l06pbn">
applicationMessage
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ msg: <custom> }"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1agdxuk" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ msg: <custom message string> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/logApplicationMessage/#mongodb-dbcommand-dbcmd.logApplicationMessage">
<code class="leafygreen-ui-1l06pbn">
logApplicationMessage
</code>
.
</a>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-message-logout">
</span>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
logout
</code>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n reason: <string>,\n initialUsers: [ <document>, ... ],\n updatedUsers: [ <document>, ... ],\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> reason: <string>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> initialUsers: [ <document>, ... ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> updatedUsers: [ <document>, ... ],</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<dl>
<dt>
<code class="leafygreen-ui-1l06pbn">
reason
</code>
will be either:
</dt>
<dd class="css-1ufxuu7">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
"Explicit logout from <database>"
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
"Implicit logout due to client connection closure"
</p>
</li>
</ul>
</dd>
</dl>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
initialUsers
</code>
is an array of documents containing users
authenticated on the current client prior to logout.
</p>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
updatedUsers
</code>
is an array of documents containing users
expected to be authenticated on the current client after the
logout event.
</p>
<dl>
<dt>
Each document in
<code class="leafygreen-ui-1l06pbn">
initialUsers
</code>
and
<code class="leafygreen-ui-1l06pbn">
updatedUsers
</code>
contains:
</dt>
<dd class="css-1ufxuu7">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
user
</code>
: the username
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
db
</code>
: the database
<code class="leafygreen-ui-1l06pbn">
user
</code>
is authenticated to
</p>
</li>
</ul>
</dd>
</dl>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-audit-message-startup">
</span>
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
startup
</code>
</p>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n startupOptions: <document>,\n initialClusterServerParameter: <array>\n}"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> startupOptions: <document>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> initialClusterServerParameter: <array of documents></td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
startupOptions
</code>
contains all of the options that the node
has after startup
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
initialClusterServerParameters
</code>
contains the initial values
of the cluster server parameters that the node has at the end
of startup:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
after they have been loaded from storage (for
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
)
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
after they have been refreshed from the config server
(for
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
).
</p>
</li>
</ul>
</li>
</ul>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
6.1
</em>
.
</p>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
0
</code>
- Success
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/db.collection.latencyStats/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
db.collection.latencyStats()
<a class="headerlink leafygreen-ui-1kepx47" href="#db.collection.latencystats--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="db.collection.latencystats--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#output" target="_self">
<span>
Output
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
db.collection.latencyStats(options)
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-db.collection.latencyStats" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-db.collection.latencyStats">
</div>
</a>
</dt>
<dd>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
mongosh Method
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This page documents a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
method. This is
<em>
not
</em>
the documentation for database commands or language-specific drivers,
such as Node.js.
</p>
<p class="leafygreen-ui-1kp3ins">
For the database command, see the
<code class="leafygreen-ui-1l06pbn">
latencyStats
</code>
field returned by the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collStats/#mongodb-dbcommand-dbcmd.collStats">
<code class="leafygreen-ui-1l06pbn">
collStats
</code>
</a>
command
<!-- -->
.
</p>
<p class="leafygreen-ui-1kp3ins">
For MongoDB API drivers, refer to the language-specific
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
MongoDB driver documentation
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.collection.latencyStats" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
db.collection.latencyStats()
</code>
</span>
</a>
returns latency
statistics for a given collection. It is a wrapper around
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/collStats/#mongodb-pipeline-pipe.-collStats">
<code class="leafygreen-ui-1l06pbn">
$collStats
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
This method has the form:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.collection.latencyStats( { histograms: <boolean> } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">collection</span>.<span class="lg-highlight-title lg-highlight-function">latencyStats</span>( <!-- -->{ <span class="lg-highlight-attr">histograms</span>: <<!-- -->boolean<!-- -->> <!-- -->} )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
histograms
</code>
argument is an optional boolean. If
<code class="leafygreen-ui-1l06pbn">
histograms: true
</code>
then
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.collection.latencyStats" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
latencyStats()
</code>
</span>
</a>
adds
latency histograms to the return document.
</p>
</dd>
</dl>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/collStats/#mongodb-pipeline-pipe.-collStats">
<code class="leafygreen-ui-1l06pbn">
$collStats
</code>
</a>
</p>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Output
<a class="headerlink leafygreen-ui-1kepx47" href="#output" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="output">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.collection.latencyStats" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
latencyStats()
</code>
</span>
</a>
returns a document containing
a field
<code class="leafygreen-ui-1l06pbn">
latencyStats
</code>
, containing the following fields:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:30%"/>
<col style="width:70%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field Name
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
reads
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Latency statistics for read requests.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
writes
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Latency statistics for write requests.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
commands
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Latency statistics for database commands.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
transactions
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Latency statistics for database transactions.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
Each of these fields contains an embedded document bearing the
following fields:
</p>
<div class="header-buffer" id="ref-inclusive_symbols-id1">
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:30%"/>
<col style="width:70%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field Name
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
latency
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
A 64-bit integer giving the total combined
latency in microseconds.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
ops
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
A 64-bit integer giving the total number of
operations performed on the collection since startup.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
histogram
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
An array of embedded documents, each representing a latency range.
Each document covers twice the previous document's range. For
lower values between 2048 microseconds and roughly 1 second,
the histogram includes half-steps.
</p>
<p class="leafygreen-ui-1kp3ins">
This field only exists given the
<code class="leafygreen-ui-1l06pbn">
latencyStats: { histograms: true }
</code>
option. Empty ranges with
a zero
<code class="leafygreen-ui-1l06pbn">
count
</code>
are omitted from the output.
</p>
<p class="leafygreen-ui-1kp3ins">
Each document bears the following fields:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<thead class="leafygreen-ui-a9ho40">
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Field Name
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Description
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
micros
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
A 64-bit integer giving the inclusive
lower time bound of the current latency range in
microseconds.
</p>
<p class="leafygreen-ui-1kp3ins">
The document's range spans between the previous document's
<code class="leafygreen-ui-1l06pbn">
micros
</code>
value, exclusive, and this document's
<code class="leafygreen-ui-1l06pbn">
micros
</code>
value, inclusive.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
count
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
A 64-bit integer giving the number of
operations with latency less than or equal to
<code class="leafygreen-ui-1l06pbn">
micros
</code>
.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
For example, if
<code class="leafygreen-ui-1l06pbn">
collStats
</code>
returns the following histogram:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"histogram: [\n { micros: NumberLong(0), count: NumberLong(10) },\n { micros: NumberLong(2), count: NumberLong(1) },\n { micros: NumberLong(4096), count: NumberLong(1) },\n { micros: NumberLong(16384), count: NumberLong(1000) },\n { micros: NumberLong(49152), count: NumberLong(100) }\n]","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-attr">histogram</span>: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">micros</span>: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">0</span>)<!-- -->, <span class="lg-highlight-attr">count</span>: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">10</span>) }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">micros</span>: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">2</span>)<!-- -->, <span class="lg-highlight-attr">count</span>: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">1</span>) }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">micros</span>: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">4096</span>)<!-- -->, <span class="lg-highlight-attr">count</span>: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">1</span>) }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">micros</span>: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">16384</span>)<!-- -->, <span class="lg-highlight-attr">count</span>: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">1000</span>) }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">micros</span>: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">49152</span>)<!-- -->, <span class="lg-highlight-attr">count</span>: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">100</span>) }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">]</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
This indicates that there were
<a class="footnote-reference header-buffer" href="#footnote-inclusive_symbols" id="ref-inclusive_symbols-id1">
[
<!-- -->
1
<!-- -->
]
</a>
:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
10 operations taking 2 microsecond or less
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
1 operation in the range [2, 4) microseconds
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
1 operation in the range [4096, 6144) microseconds
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
1000 operations in the range [16384, 24576) microseconds
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
100 operations in the range [49152, 65536) microseconds
</p>
</li>
</ul>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<table class="header-buffer leafygreen-ui-rbqgrl" frame="void" id="footnote-inclusive_symbols" rules="none">
<colgroup>
<col/>
</colgroup>
<tbody valign="top">
<tr>
<td class="leafygreen-ui-17r2xs0">
[
<a href="#ref-inclusive_symbols-id1">
1
</a>
]
</td>
<td class="leafygreen-ui-17r2xs0">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
The
<code class="leafygreen-ui-1l06pbn">
(
</code>
symbol notation on this page means the value is exclusive.
</li>
<li class="leafygreen-ui-d7p7b6">
The
<code class="leafygreen-ui-1l06pbn">
]
</code>
symbol notation on this page means the value is inclusive.
</li>
</ul>
</td>
</tr>
</tbody>
</table>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can run
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.collection.latencyStats" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
latencyStats()
</code>
</span>
</a>
in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
as follows:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.data.latencyStats( { histograms: true } ).pretty()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">data</span>.<span class="lg-highlight-title lg-highlight-function">latencyStats</span>( <!-- -->{ <span class="lg-highlight-attr">histograms</span>: <span class="lg-highlight-literal">true</span> } ).<span class="lg-highlight-title lg-highlight-function">pretty</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-db.collection.latencyStats" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
latencyStats()
</code>
</span>
</a>
returns a document such as
the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{\n \"ns\" : \"test.data\",\n \"localTime\" : ISODate(\"2016-11-01T21:56:28.962Z\"),\n \"latencyStats\" : {\n \"reads\" : {\n \"histogram\" : [\n {\n \"micros\" : NumberLong(16),\n \"count\" : NumberLong(6)\n },\n {\n \"micros\" : NumberLong(512),\n \"count\" : NumberLong(1)\n }\n ],\n \"latency\" : NumberLong(747),\n \"ops\" : NumberLong(7)\n },\n \"writes\" : {\n \"histogram\" : [\n {\n \"micros\" : NumberLong(64),\n \"count\" : NumberLong(1)\n },\n {\n \"micros\" : NumberLong(24576),\n \"count\" : NumberLong(1)\n }\n ],\n \"latency\" : NumberLong(26845),\n \"ops\" : NumberLong(2)\n },\n \"commands\" : {\n \"histogram\" : [ ],\n \"latency\" : NumberLong(0),\n \"ops\" : NumberLong(0)\n }\n }\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"ns"</span> <!-- -->: <span class="lg-highlight-string">"test.data"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"localTime"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2016-11-01T21:56:28.962Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"latencyStats"</span> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"reads"</span> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"histogram"</span> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"micros"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">16</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"count"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">6</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"micros"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">512</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"count"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">1</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"latency"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">747</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"ops"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">7</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"writes"</span> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"histogram"</span> <!-- -->: <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"micros"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">64</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"count"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">1</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"micros"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">24576</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"count"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">1</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"latency"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">26845</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"ops"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">2</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"commands"</span> <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"histogram"</span> <!-- -->: <!-- -->[ <!-- -->]<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"latency"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">0</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"ops"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">NumberLong</span>(<span class="lg-highlight-number">0</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
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|
https://www.mongodb.com/docs/manual/reference/operator/aggregation/addToSet/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
$addToSet (aggregation)
<a class="headerlink leafygreen-ui-1kepx47" href="#-addtoset--aggregation-" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="-addtoset--aggregation-">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<div>
<p>
<em>
Changed
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
<dl class="group">
<dt>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-group-grp.-addToSet" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-group-grp.-addToSet">
</div>
</a>
</dt>
<dd>
</dd>
</dl>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
returns an array of all
<em>
unique
</em>
values that
results from applying an
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
expression
</a>
to each document in a group.
</p>
<p class="leafygreen-ui-1kp3ins">
The order of the elements in the returned array is unspecified.
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
is available in these stages:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/bucket/#mongodb-pipeline-pipe.-bucket">
<code class="leafygreen-ui-1l06pbn">
$bucket
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/bucketAuto/#mongodb-pipeline-pipe.-bucketAuto">
<code class="leafygreen-ui-1l06pbn">
$bucketAuto
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#mongodb-pipeline-pipe.-setWindowFields">
<code class="leafygreen-ui-1l06pbn">
$setWindowFields
</code>
</a>
(Available starting in MongoDB 5.0)
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ $addToSet: <expression> }"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light none leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ $addToSet: <expression> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For more information on expressions, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/#std-label-aggregation-expressions">
Expression Operators
<!-- -->
.
</a>
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
If the value of the expression is an array,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
appends
the whole array as a
<em>
single
</em>
element.
</p>
<p class="leafygreen-ui-1kp3ins">
If the value of the expression is a document, MongoDB determines that
the document is a duplicate if another document in the array matches the
to-be-added document exactly. Specifically, the existing document has
the exact same fields and values in the exact same order.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Use in
<code class="leafygreen-ui-1l06pbn">
$group
</code>
Stage
<a class="headerlink leafygreen-ui-1kepx47" href="#use-in--group-stage" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="use-in--group-stage">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Consider a
<code class="leafygreen-ui-1l06pbn">
sales
</code>
collection with the following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 1, \"item\" : \"abc\", \"price\" : 10, \"quantity\" : 2, \"date\" : ISODate(\"2014-01-01T08:00:00Z\") }\n{ \"_id\" : 2, \"item\" : \"jkl\", \"price\" : 20, \"quantity\" : 1, \"date\" : ISODate(\"2014-02-03T09:00:00Z\") }\n{ \"_id\" : 3, \"item\" : \"xyz\", \"price\" : 5, \"quantity\" : 5, \"date\" : ISODate(\"2014-02-03T09:05:00Z\") }\n{ \"_id\" : 4, \"item\" : \"abc\", \"price\" : 10, \"quantity\" : 10, \"date\" : ISODate(\"2014-02-15T08:00:00Z\") }\n{ \"_id\" : 5, \"item\" : \"xyz\", \"price\" : 5, \"quantity\" : 10, \"date\" : ISODate(\"2014-02-15T09:12:00Z\") }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"abc"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"date"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2014-01-01T08:00:00Z"</span>) }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"jkl"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">20</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"date"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2014-02-03T09:00:00Z"</span>) }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"xyz"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"date"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2014-02-03T09:05:00Z"</span>) }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"abc"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-string">"date"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2014-02-15T08:00:00Z"</span>) }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"item"</span> <!-- -->: <span class="lg-highlight-string">"xyz"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">10</span>, <span class="lg-highlight-string">"date"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2014-02-15T09:12:00Z"</span>) }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Grouping the documents by the day and the year of the
<code class="leafygreen-ui-1l06pbn">
date
</code>
field,
the following operation uses the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
accumulator to
compute the list of unique items sold for each group:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.sales.aggregate(\n [\n {\n $group:\n {\n _id: { day: { $dayOfYear: \"$date\"}, year: { $year: \"$date\" } },\n itemsSold: { $addToSet: \"$item\" }\n }\n }\n ]\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">sales</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$group</span>:</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">_id</span>: <!-- -->{ <span class="lg-highlight-attr">day</span>: <!-- -->{ <span class="lg-highlight-attr">$dayOfYear</span>: <span class="lg-highlight-string">"$date"</span>}<!-- -->, <span class="lg-highlight-attr">year</span>: <!-- -->{ <span class="lg-highlight-attr">$year</span>: <span class="lg-highlight-string">"$date"</span> } }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">itemsSold</span>: <!-- -->{ <span class="lg-highlight-attr">$addToSet</span>: <span class="lg-highlight-string">"$item"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The operation returns the following results:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : { \"day\" : 46, \"year\" : 2014 }, \"itemsSold\" : [ \"xyz\", \"abc\" ] }\n{ \"_id\" : { \"day\" : 34, \"year\" : 2014 }, \"itemsSold\" : [ \"xyz\", \"jkl\" ] }\n{ \"_id\" : { \"day\" : 1, \"year\" : 2014 }, \"itemsSold\" : [ \"abc\" ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"day"</span> <!-- -->: <span class="lg-highlight-number">46</span>, <span class="lg-highlight-string">"year"</span> <!-- -->: <span class="lg-highlight-number">2014</span> }<!-- -->, <span class="lg-highlight-string">"itemsSold"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"xyz"</span>, <span class="lg-highlight-string">"abc"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"day"</span> <!-- -->: <span class="lg-highlight-number">34</span>, <span class="lg-highlight-string">"year"</span> <!-- -->: <span class="lg-highlight-number">2014</span> }<!-- -->, <span class="lg-highlight-string">"itemsSold"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"xyz"</span>, <span class="lg-highlight-string">"jkl"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"day"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"year"</span> <!-- -->: <span class="lg-highlight-number">2014</span> }<!-- -->, <span class="lg-highlight-string">"itemsSold"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"abc"</span> ] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Use in
<code class="leafygreen-ui-1l06pbn">
$setWindowFields
</code>
Stage
<a class="headerlink leafygreen-ui-1kepx47" href="#use-in--setwindowfields-stage" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="use-in--setwindowfields-stage">
</div>
</a>
</h3>
<div>
<p>
<em>
New
<!-- -->
in version
<!-- -->
5.0
</em>
.
</p>
</div>
<p class="leafygreen-ui-1kp3ins">
Create a
<code class="leafygreen-ui-1l06pbn">
cakeSales
</code>
collection that contains cake sales in the states
of California (
<code class="leafygreen-ui-1l06pbn">
CA
</code>
) and Washington (
<code class="leafygreen-ui-1l06pbn">
WA
</code>
):
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.cakeSales.insertMany( [\n { _id: 0, type: \"chocolate\", orderDate: new Date(\"2020-05-18T14:10:30Z\"),\n state: \"CA\", price: 13, quantity: 120 },\n { _id: 1, type: \"chocolate\", orderDate: new Date(\"2021-03-20T11:30:05Z\"),\n state: \"WA\", price: 14, quantity: 140 },\n { _id: 2, type: \"vanilla\", orderDate: new Date(\"2021-01-11T06:31:15Z\"),\n state: \"CA\", price: 12, quantity: 145 },\n { _id: 3, type: \"vanilla\", orderDate: new Date(\"2020-02-08T13:13:23Z\"),\n state: \"WA\", price: 13, quantity: 104 },\n { _id: 4, type: \"strawberry\", orderDate: new Date(\"2019-05-18T16:09:01Z\"),\n state: \"CA\", price: 41, quantity: 162 },\n { _id: 5, type: \"strawberry\", orderDate: new Date(\"2019-01-08T06:12:03Z\"),\n state: \"WA\", price: 43, quantity: 134 }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">cakeSales</span>.<span class="lg-highlight-title lg-highlight-function">insertMany</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"chocolate"</span>, <span class="lg-highlight-attr">orderDate</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2020-05-18T14:10:30Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">state</span>: <span class="lg-highlight-string">"CA"</span>, <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">13</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">120</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"chocolate"</span>, <span class="lg-highlight-attr">orderDate</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2021-03-20T11:30:05Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">state</span>: <span class="lg-highlight-string">"WA"</span>, <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">14</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">140</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"vanilla"</span>, <span class="lg-highlight-attr">orderDate</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2021-01-11T06:31:15Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">state</span>: <span class="lg-highlight-string">"CA"</span>, <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">12</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">145</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"vanilla"</span>, <span class="lg-highlight-attr">orderDate</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2020-02-08T13:13:23Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">state</span>: <span class="lg-highlight-string">"WA"</span>, <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">13</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">104</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"strawberry"</span>, <span class="lg-highlight-attr">orderDate</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2019-05-18T16:09:01Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">state</span>: <span class="lg-highlight-string">"CA"</span>, <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">41</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">162</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{ <span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-attr">type</span>: <span class="lg-highlight-string">"strawberry"</span>, <span class="lg-highlight-attr">orderDate</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">Date</span>(<span class="lg-highlight-string">"2019-01-08T06:12:03Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">state</span>: <span class="lg-highlight-string">"WA"</span>, <span class="lg-highlight-attr">price</span>: <span class="lg-highlight-number">43</span>, <span class="lg-highlight-attr">quantity</span>: <span class="lg-highlight-number">134</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
This example uses
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#mongodb-pipeline-pipe.-setWindowFields">
<code class="leafygreen-ui-1l06pbn">
$setWindowFields
</code>
</a>
stage to output the unique cake
<code class="leafygreen-ui-1l06pbn">
type
</code>
sales for each
<code class="leafygreen-ui-1l06pbn">
state
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.cakeSales.aggregate( [\n {\n $setWindowFields: {\n partitionBy: \"$state\",\n sortBy: { orderDate: 1 },\n output: {\n cakeTypesForState: {\n $addToSet: \"$type\",\n window: {\n documents: [ \"unbounded\", \"current\" ]\n }\n }\n }\n }\n }\n] )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">cakeSales</span>.<span class="lg-highlight-title lg-highlight-function">aggregate</span>( <!-- -->[</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$setWindowFields</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">partitionBy</span>: <span class="lg-highlight-string">"$state"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">sortBy</span>: <!-- -->{ <span class="lg-highlight-attr">orderDate</span>: <span class="lg-highlight-number">1</span> }<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">output</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">cakeTypesForState</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$addToSet</span>: <span class="lg-highlight-string">"$type"</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">window</span>: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">documents</span>: <!-- -->[ <span class="lg-highlight-string">"unbounded"</span>, <span class="lg-highlight-string">"current"</span> ]</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">] )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
In the example:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
partitionBy: "$state"
</code>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-partitionBy">
partitions
</a>
the documents in the collection by
<code class="leafygreen-ui-1l06pbn">
state
</code>
. There are partitions for
<code class="leafygreen-ui-1l06pbn">
CA
</code>
and
<code class="leafygreen-ui-1l06pbn">
WA
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
sortBy: { orderDate: 1 }
</code>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-sortBy">
sorts
</a>
the documents in each partition by
<code class="leafygreen-ui-1l06pbn">
orderDate
</code>
in ascending order (
<code class="leafygreen-ui-1l06pbn">
1
</code>
), so the earliest
<code class="leafygreen-ui-1l06pbn">
orderDate
</code>
is first.
</p>
</li>
</ul>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
output
</code>
adds each unique cake
<code class="leafygreen-ui-1l06pbn">
type
</code>
to the
<code class="leafygreen-ui-1l06pbn">
cakeTypesForState
</code>
array field using
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
that is run in a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-documents">
documents
</a>
window.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/setWindowFields/#std-label-setWindowFields-window">
window
</a>
contains documents between
an
<code class="leafygreen-ui-1l06pbn">
unbounded
</code>
lower limit and the
<code class="leafygreen-ui-1l06pbn">
current
</code>
document. This means
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-group-grp.-addToSet" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
$addToSet
</code>
</span>
</a>
returns an array containing the unique cake
<code class="leafygreen-ui-1l06pbn">
type
</code>
fields for the documents between the beginning of the
partition and the current document.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
In this example output, the cake
<code class="leafygreen-ui-1l06pbn">
type
</code>
array for
<code class="leafygreen-ui-1l06pbn">
CA
</code>
and
<code class="leafygreen-ui-1l06pbn">
WA
</code>
is
shown in the
<code class="leafygreen-ui-1l06pbn">
cakeTypesForState
</code>
field:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : 4, \"type\" : \"strawberry\", \"orderDate\" : ISODate(\"2019-05-18T16:09:01Z\"),\n \"state\" : \"CA\", \"price\" : 41, \"quantity\" : 162,\n \"cakeTypesForState\" : [ \"strawberry\" ] }\n{ \"_id\" : 0, \"type\" : \"chocolate\", \"orderDate\" : ISODate(\"2020-05-18T14:10:30Z\"),\n \"state\" : \"CA\", \"price\" : 13, \"quantity\" : 120,\n \"cakeTypesForState\" : [ \"strawberry\", \"chocolate\" ] }\n{ \"_id\" : 2, \"type\" : \"vanilla\", \"orderDate\" : ISODate(\"2021-01-11T06:31:15Z\"),\n \"state\" : \"CA\", \"price\" : 12, \"quantity\" : 145,\n \"cakeTypesForState\" : [ \"strawberry\", \"vanilla\", \"chocolate\" ] }\n{ \"_id\" : 5, \"type\" : \"strawberry\", \"orderDate\" : ISODate(\"2019-01-08T06:12:03Z\"),\n \"state\" : \"WA\", \"price\" : 43, \"quantity\" : 134,\n \"cakeTypesForState\" : [ \"strawberry\" ] }\n{ \"_id\" : 3, \"type\" : \"vanilla\", \"orderDate\" : ISODate(\"2020-02-08T13:13:23Z\"),\n \"state\" : \"WA\", \"price\" : 13, \"quantity\" : 104,\n \"cakeTypesForState\" : [ \"vanilla\", \"strawberry\" ] }\n{ \"_id\" : 1, \"type\" : \"chocolate\", \"orderDate\" : ISODate(\"2021-03-20T11:30:05Z\"),\n \"state\" : \"WA\", \"price\" : 14, \"quantity\" : 140,\n \"cakeTypesForState\" : [ \"vanilla\", \"chocolate\", \"strawberry\" ] }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-tyg50d">
<pre class="leafygreen-ui-1453az5" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">4</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"strawberry"</span>, <span class="lg-highlight-string">"orderDate"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2019-05-18T16:09:01Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"state"</span> <!-- -->: <span class="lg-highlight-string">"CA"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">41</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">162</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"cakeTypesForState"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"strawberry"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"chocolate"</span>, <span class="lg-highlight-string">"orderDate"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2020-05-18T14:10:30Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"state"</span> <!-- -->: <span class="lg-highlight-string">"CA"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">13</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">120</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"cakeTypesForState"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"strawberry"</span>, <span class="lg-highlight-string">"chocolate"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"vanilla"</span>, <span class="lg-highlight-string">"orderDate"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2021-01-11T06:31:15Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"state"</span> <!-- -->: <span class="lg-highlight-string">"CA"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">12</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">145</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"cakeTypesForState"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"strawberry"</span>, <span class="lg-highlight-string">"vanilla"</span>, <span class="lg-highlight-string">"chocolate"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">5</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"strawberry"</span>, <span class="lg-highlight-string">"orderDate"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2019-01-08T06:12:03Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"state"</span> <!-- -->: <span class="lg-highlight-string">"WA"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">43</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">134</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"cakeTypesForState"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"strawberry"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"vanilla"</span>, <span class="lg-highlight-string">"orderDate"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2020-02-08T13:13:23Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"state"</span> <!-- -->: <span class="lg-highlight-string">"WA"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">13</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">104</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"cakeTypesForState"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"vanilla"</span>, <span class="lg-highlight-string">"strawberry"</span> ] }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"type"</span> <!-- -->: <span class="lg-highlight-string">"chocolate"</span>, <span class="lg-highlight-string">"orderDate"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2021-03-20T11:30:05Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"state"</span> <!-- -->: <span class="lg-highlight-string">"WA"</span>, <span class="lg-highlight-string">"price"</span> <!-- -->: <span class="lg-highlight-number">14</span>, <span class="lg-highlight-string">"quantity"</span> <!-- -->: <span class="lg-highlight-number">140</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-string">"cakeTypesForState"</span> <!-- -->: <!-- -->[ <span class="lg-highlight-string">"vanilla"</span>, <span class="lg-highlight-string">"chocolate"</span>, <span class="lg-highlight-string">"strawberry"</span> ] }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/queryable-encryption/overview-enable-qe/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Overview: Enable Queryable Encryption
<a class="headerlink leafygreen-ui-1kepx47" href="#overview--enable-queryable-encryption" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
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</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="overview--enable-queryable-encryption">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#enable-queryable-encryption" target="_self">
<span>
Enable Queryable Encryption
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#install-a-compatible-mongodb-driver-and-dependencies" target="_self">
<span>
Install a compatible MongoDB driver and dependencies
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#install-and-configure-a-queryable-encryption-library" target="_self">
<span>
Install and configure a Queryable Encryption library
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#create-a-customer-master-key" target="_self">
<span>
Create a Customer Master Key
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#create-your-queryable-encryption-enabled-application" target="_self">
<span>
Create your Queryable Encryption enabled application
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#use-queryable-encryption" target="_self">
<span>
Use Queryable Encryption
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
This page summarizes the tasks required to set up your MongoDB
deployment and your development environment for Queryable Encryption.
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Enable Queryable Encryption
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</path>
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</h2>
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1
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<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Install a compatible MongoDB driver and dependencies
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<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
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</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/queryable-encryption/install/#std-label-qe-install">
Install a Queryable Encryption compatible driver
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/queryable-encryption/reference/libmongocrypt/#std-label-qe-reference-libmongocrypt">
Install libmongocrypt
</a>
</p>
</section>
</div>
</div>
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<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Install and configure a Queryable Encryption library
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</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/queryable-encryption/install-library/#std-label-qe-csfle-install-library">
Install and configure a Queryable Encryption library
</a>
</p>
</section>
</div>
</div>
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3
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</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Create a Customer Master Key
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</path>
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</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/queryable-encryption/qe-create-cmk/#std-label-qe-create-cmk">
Create a Customer Master Key
</a>
</p>
</section>
</div>
</div>
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4
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Create your Queryable Encryption enabled application
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</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/queryable-encryption/qe-create-application/#std-label-qe-create-application">
Create a Queryable Encryption enabled application
</a>
</p>
</section>
</div>
</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Use Queryable Encryption
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</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
After you install a Queryable Encryption driver and libraries, create a Customer Master Key, and
create your application, you can start encrypting and querying data. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/queryable-encryption/overview-use-qe/#std-label-qe-overview-use-qe">
Overview: Use Queryable Encryption
</a>
for instructions.
</p>
</section>
</section>
|
https://www.mongodb.com/docs/manual/core/queryable-encryption/overview-use-qe/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Overview: Use Queryable Encryption
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</a>
</h1>
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<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#enable-queryable-encryption" target="_self">
<span>
Enable Queryable Encryption
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#use-queryable-encryption" target="_self">
<span>
Use Queryable Encryption
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#create-an-encrypted-collection-and-insert-a-document-with-encrypted-fields" target="_self">
<span>
Create an encrypted collection and insert a document with encrypted fields
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-x9koo9" href="#query-a-document-with-encrypted-fields" target="_self">
<span>
Query a document with encrypted fields
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
This page summarizes the tasks required to create a Queryable Encryption-enabled
collection, insert a document with encrypted fields, and query encrypted
data.
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Enable Queryable Encryption
<a class="headerlink leafygreen-ui-1kepx47" href="#enable-queryable-encryption" title="Permalink to this heading">
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</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="enable-queryable-encryption">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Before encrypting and querying data, you must install a Queryable Encryption-enabled driver
and libraries, create a Customer Master Key, and create your application. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/queryable-encryption/overview-enable-qe/#std-label-qe-overview-enable-qe">
Overview: Enable Queryable Encryption
</a>
for instructions.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Use Queryable Encryption
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</path>
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</div>
</a>
</h2>
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Create an encrypted collection and insert a document with encrypted fields
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</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/queryable-encryption/qe-create-encrypted-collection/#std-label-qe-create-encrypted-collection">
Create an encrypted collection and insert documents
</a>
</p>
</section>
</div>
</div>
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2
</div>
</div>
<div class="css-1ed38mk">
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Query a document with encrypted fields
<a class="headerlink leafygreen-ui-1kepx47" href="#query-a-document-with-encrypted-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="query-a-document-with-encrypted-fields">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/queryable-encryption/qe-retrieve-encrypted-document/#std-label-qe-query-encrypted-document">
Query a document with encrypted fields
</a>
</p>
</section>
</div>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/release-notes/8.0-upgrade/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Upgrade
<!-- -->
7.0
<!-- -->
to
<!-- -->
8.0
<a class="headerlink leafygreen-ui-1kepx47" href="#upgrade-oldversion-to-newversion" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="upgrade-oldversion-to-newversion">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#upgrade-path" target="_self">
<span>
Upgrade Path
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#procedures" target="_self">
<span>
Procedures
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
This page lists procedures used to upgrade from
<!-- -->
7.0
<!-- -->
to
<!-- -->
8.0
<!-- -->
.
</p>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Upgrade Path
<a class="headerlink leafygreen-ui-1kepx47" href="#upgrade-path" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="upgrade-path">
</div>
</a>
</h2>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Before you upgrade or downgrade a replica set, ensure all replica set
members are running. If you do not, the upgrade or downgrade will not
complete until all members are started.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
If you need to downgrade from
<!-- -->
8.0
<!-- -->
, downgrade to the latest
patch release of
<!-- -->
7.0
<!-- -->
.
</p>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Procedures
<a class="headerlink leafygreen-ui-1kepx47" href="#procedures" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="procedures">
</div>
</a>
</h2>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/8.0-upgrade-standalone/#std-label-8.0-upgrade-standalone">
Upgrade a Standalone to 8.0
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/8.0-upgrade-replica-set/#std-label-8.0-upgrade-replica-set">
Upgrade a Replica Set to 8.0
<!-- -->
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/release-notes/8.0-upgrade-sharded-cluster/#std-label-8.0-upgrade-sharded-cluster">
Upgrade a Sharded Cluster to 8.0
<!-- -->
.
</a>
</p>
</li>
</ul>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/Mongo.startSession/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Mongo.startSession()
<a class="headerlink leafygreen-ui-1kepx47" href="#mongo.startsession--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongo.startsession--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#examples" target="_self">
<span>
Examples
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
Mongo.startSession(<options>)
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-Mongo.startSession" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-Mongo.startSession">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Starts a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/read-isolation-consistency-recency/#std-label-sessions">
session
</a>
for the connection.
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
assigns the session ID to commands associated
with the session.
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
mongosh Method
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This page documents a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
method. This is
<em>
not
</em>
the documentation for database commands or language-specific drivers,
such as Node.js.
</p>
<p class="leafygreen-ui-1kp3ins">
For the database command, see the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/startSession/#mongodb-dbcommand-dbcmd.startSession">
<code class="leafygreen-ui-1l06pbn">
startSession
</code>
</a>
command
<!-- -->
.
</p>
<p class="leafygreen-ui-1kp3ins">
For MongoDB API drivers, refer to the language-specific
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
MongoDB driver documentation
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
A session can only be used with the
<code class="leafygreen-ui-1l06pbn">
MongoClient
</code>
object that created
the session. A single session cannot be used concurrently. Operations
that use a single session must be run sequentially.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-Mongo.startSession" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
startSession()
</code>
</span>
</a>
method can take a document with
session options. The options available are:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
causalConsistency
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Boolean. Enables or disables
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/read-isolation-consistency-recency/#std-label-causal-consistency">
causal consistency
</a>
for the session.
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-Mongo.startSession" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
Mongo.startSession()
</code>
</span>
</a>
enables
<code class="leafygreen-ui-1l06pbn">
causalConsistency
</code>
by default. Mutually exclusive with
<code class="leafygreen-ui-1l06pbn">
snapshot
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
After starting a session, you cannot modify its
<code class="leafygreen-ui-1l06pbn">
causalConsistency
</code>
setting.
</p>
<p class="leafygreen-ui-1kp3ins">
The session may have causal consistency enabled even
though the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Mongo/#mongodb-method-Mongo">
<code class="leafygreen-ui-1l06pbn">
Mongo()
</code>
</a>
connection object may have
causal consistency disabled or vice versa. To set causal
consistency on the connection object, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Mongo.setCausalConsistency/#mongodb-method-Mongo.setCausalConsistency">
<code class="leafygreen-ui-1l06pbn">
Mongo.setCausalConsistency()
</code>
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
readConcern
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Document. Specifies the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern/#std-label-read-concern">
read concern
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
To modify the setting after starting a session, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Session/#mongodb-method-Session.getOptions">
<code class="leafygreen-ui-1l06pbn">
Session.getOptions().setReadConcern()
</code>
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
readPreference
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Document. Specifies the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/read-preference/#std-label-read-preference">
read preference
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The readPreference document contains the
<code class="leafygreen-ui-1l06pbn">
mode
</code>
field and
the optional
<code class="leafygreen-ui-1l06pbn">
tags
</code>
field:
</p>
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<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">mode</span>: <<!-- -->string<!-- -->><!-- -->,<!-- --> <span class="lg-highlight-attr">tags</span>: <<!-- -->array<!-- -->> <!-- -->}</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To modify the setting after starting a session, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Session/#mongodb-method-Session.getOptions">
<code class="leafygreen-ui-1l06pbn">
Session.getOptions().setReadPreference()
</code>
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
retryWrites
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Boolean. Enables or disables the ability to retry writes upon
encountering transient network errors.
</p>
<p class="leafygreen-ui-1kp3ins">
If you start
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
with the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/reference/options/#std-option-mongosh.--retryWrites" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
--retryWrites
</code>
</span>
</a>
option,
<code class="leafygreen-ui-1l06pbn">
retryWrites
</code>
is enabled by
default for
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-Mongo.startSession" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
Mongo.startSession()
</code>
.
</span>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
After starting a session, you cannot modify its
<code class="leafygreen-ui-1l06pbn">
retryWrites
</code>
setting.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
snapshot
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Boolean. Enables
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-snapshot/#std-label-read-concern-snapshot">
snapshot reads
</a>
for the session for MongoDB 5.0+ deployments. Mutually
exclusive with
<code class="leafygreen-ui-1l06pbn">
causalConsistency
</code>
.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
writeConcern
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Document. Specifies the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#std-label-write-concern">
write concern
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
To modify the setting after starting a session, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Session/#mongodb-method-Session.getOptions">
<code class="leafygreen-ui-1l06pbn">
Session.getOptions().setWriteConcern()
</code>
.
</a>
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This method is available in deployments hosted in the following environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This command is supported in all MongoDB Atlas clusters.
For information on Atlas support for all commands, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/" target="_self">
<span>
Unsupported Commands
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Examples
<a class="headerlink leafygreen-ui-1kepx47" href="#examples" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="examples">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following starts a session with causal consistency and retryable
writes enabled on the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Mongo/#mongodb-method-Mongo">
<code class="leafygreen-ui-1l06pbn">
Mongo()
</code>
</a>
connection object associated with
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
's global
<code class="leafygreen-ui-1l06pbn">
db
</code>
variable:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db = db.getMongo().startSession({retryWrites: true, causalConsistency: true}).getDatabase(db.getName());","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db <!-- -->= <!-- -->db.<span class="lg-highlight-title lg-highlight-function">getMongo</span>(<!-- -->).<span class="lg-highlight-title lg-highlight-function">startSession</span>(<!-- -->{<span class="lg-highlight-attr">retryWrites</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">causalConsistency</span>: <span class="lg-highlight-literal">true</span>}).<span class="lg-highlight-title lg-highlight-function">getDatabase</span>(<!-- -->db.<span class="lg-highlight-title lg-highlight-function">getName</span>(<!-- -->))<!-- -->;</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/command/connectionStatus/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
connectionStatus
<a class="headerlink leafygreen-ui-1kepx47" href="#connectionstatus" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="connectionstatus">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#compatibility" target="_self">
<span>
Compatibility
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#syntax" target="_self">
<span>
Syntax
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#output" target="_self">
<span>
Output
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="dbcommand">
<dt>
<code class="leafygreen-ui-1l06pbn">
connectionStatus
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-dbcommand-dbcmd.connectionStatus" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-dbcommand-dbcmd.connectionStatus">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Returns information about the current connection, specifically the
state of authenticated users and their available permissions.
</p>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Compatibility
<a class="headerlink leafygreen-ui-1kepx47" href="#compatibility" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="compatibility">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
This command is available in deployments hosted in the following environments:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas?tck=docs_server" target="_self">
<span>
MongoDB Atlas
</span>
</a>
: The fully
managed service for MongoDB deployments in the cloud
</p>
</li>
</ul>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This command is supported in all MongoDB Atlas clusters.
For information on Atlas support for all commands, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/atlas/unsupported-commands/" target="_self">
<span>
Unsupported Commands
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-enterprise/#std-label-install-mdb-enterprise">
MongoDB Enterprise
</a>
: The
subscription-based, self-managed version of MongoDB
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/administration/install-community/#std-label-install-mdb-community-edition">
MongoDB Community
</a>
: The
source-available, free-to-use, and self-managed version of MongoDB
</p>
</li>
</ul>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Syntax
<a class="headerlink leafygreen-ui-1kepx47" href="#syntax" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="syntax">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The command has the following syntax:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand(\n {\n connectionStatus: 1,\n showPrivileges: <boolean>\n }\n)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>(</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">connectionStatus</span>: <span class="lg-highlight-number">1</span>,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">showPrivileges</span>: <<!-- -->boolean<!-- -->></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->}</td></tr><tr class=""><td class="leafygreen-ui-7razhx">)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
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</div>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Command Fields
<a class="headerlink leafygreen-ui-1kepx47" href="#command-fields" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="command-fields">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.connectionStatus" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
connectionStatus
</code>
</span>
</a>
supports the following optional
field:
</p>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:20%"/>
<col style="width:20%"/>
<col style="width:80%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Field
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Type
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
showPrivileges
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
boolean
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Optional. Set
<code class="leafygreen-ui-1l06pbn">
showPrivileges
</code>
to true to instruct
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.connectionStatus" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
connectionStatus
</code>
</span>
</a>
to return the full set of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/#std-label-security-user-actions">
privileges
</a>
that
currently-authenticated users possess.
</p>
<p class="leafygreen-ui-1kp3ins">
By default, this field is
<code class="leafygreen-ui-1l06pbn">
false
</code>
.
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
To run
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-dbcommand-dbcmd.connectionStatus" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
connectionStatus
</code>
</span>
</a>
use the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.runCommand/#mongodb-method-db.runCommand">
<code class="leafygreen-ui-1l06pbn">
db.runCommand()
</code>
</a>
method, as in the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.runCommand( { connectionStatus: 1, showPrivileges: true } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">runCommand</span>( <!-- -->{ <span class="lg-highlight-attr">connectionStatus</span>: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-attr">showPrivileges</span>: <span class="lg-highlight-literal">true</span> } )</td></tr></tbody></table></code></pre>
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<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</button>
</div>
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</div>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Output
<a class="headerlink leafygreen-ui-1kepx47" href="#output" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="output">
</div>
</a>
</h2>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
connectionStatus.authInfo
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-connectionStatus.authInfo" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-connectionStatus.authInfo">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
A document with data about the authentication state of the current
connection, including users and available permissions.
</p>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
connectionStatus.authinfo.authenticatedUsers
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-connectionStatus.authinfo.authenticatedUsers" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-connectionStatus.authinfo.authenticatedUsers">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
An array with documents for each authenticated user.
</p>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
connectionStatus.authInfo.authenticatedUsers[n].user
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-connectionStatus.authInfo.authenticatedUsers-n-.user" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-connectionStatus.authInfo.authenticatedUsers-n-.user">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The user's name.
</p>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
connectionStatus.authInfo.authenticatedUsers[n].db
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-connectionStatus.authInfo.authenticatedUsers-n-.db" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-connectionStatus.authInfo.authenticatedUsers-n-.db">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The database associated with the user's credentials.
</p>
</dd>
</dl>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
connectionStatus.authinfo.authenticatedUserRoles
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-connectionStatus.authinfo.authenticatedUserRoles" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-connectionStatus.authinfo.authenticatedUserRoles">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
An array with documents for each role granted to the current connection:
</p>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
connectionStatus.authinfo.authenticatedUserRoles[n].role
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-connectionStatus.authinfo.authenticatedUserRoles-n-.role" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-connectionStatus.authinfo.authenticatedUserRoles-n-.role">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The definition of the current roles associated with the current
authenticated users. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/built-in-roles/">
Built-In Roles in Self-Managed Deployments
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/">
Privilege Actions for Self-Managed Deployments
</a>
for more information.
</p>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
connectionStatus.authinfo.authenticatedUserRoles[n].db
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-connectionStatus.authinfo.authenticatedUserRoles-n-.db" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-connectionStatus.authinfo.authenticatedUserRoles-n-.db">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The database to which
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-data-connectionStatus.authinfo.authenticatedUserRoles-n-.role" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
role
</code>
</span>
</a>
applies.
</p>
</dd>
</dl>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
connectionStatus.authInfo.authenticatedUserPrivileges
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-connectionStatus.authInfo.authenticatedUserPrivileges" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-connectionStatus.authInfo.authenticatedUserPrivileges">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
An array with documents describing the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/privilege-actions/">
actions
</a>
granted to the current connection,
grouped by resource.
</p>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
connectionStatus.authInfo.authenticatedUserPrivileges[n].resource
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-connectionStatus.authInfo.authenticatedUserPrivileges-n-.resource" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-connectionStatus.authInfo.authenticatedUserPrivileges-n-.resource">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
A document describing the database and, if applicable, collection
to which
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-data-connectionStatus.authInfo.authenticatedUserPrivileges-n-.actions" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
connectionStatus.authInfo.authenticatedUserPrivileges[n].actions
</code>
</span>
</a>
applies.
</p>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
connectionStatus.authInfo.authenticatedUserPrivileges[n].actions
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-connectionStatus.authInfo.authenticatedUserPrivileges-n-.actions" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-connectionStatus.authInfo.authenticatedUserPrivileges-n-.actions">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
An array listing the privilege actions that
the connection has access to for the specified resource.
</p>
</dd>
</dl>
</dd>
</dl>
<dl class="data">
<dt>
<code class="leafygreen-ui-1l06pbn">
connectionStatus.ok
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-data-connectionStatus.ok" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-data-connectionStatus.ok">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
The return value for the command. A value of
<code class="leafygreen-ui-1l06pbn">
1
</code>
indicates
success.
</p>
</dd>
</dl>
</section>
</section>
|
https://www.mongodb.com/docs/manual/tutorial/manage-the-database-profiler/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Database Profiler
<a class="headerlink leafygreen-ui-1kepx47" href="#database-profiler" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="database-profiler">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#profiling-levels" target="_self">
<span>
Profiling Levels
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#enable-and-configure-database-profiling" target="_self">
<span>
Enable and Configure Database Profiling
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#view-profiler-data" target="_self">
<span>
View Profiler Data
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#profiler-overhead" target="_self">
<span>
Profiler Overhead
</span>
</a>
</li>
</ul>
</div>
<p class="leafygreen-ui-1kp3ins">
The database profiler collects detailed information about
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/#std-label-database-commands">
Database Commands
</a>
executed against a running
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instance. This includes CRUD operations as well as configuration and
administration commands.
</p>
<p class="leafygreen-ui-1kp3ins">
The profiler writes all the data it collects to a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection, a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/capped-collections/#std-label-manual-capped-collection">
capped collection
</a>
in each profiled
database. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/database-profiler/">
Database Profiler Output
</a>
for an overview of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
documents created by
the profiler.
</p>
<p class="leafygreen-ui-1kp3ins">
The profiler is
<code class="leafygreen-ui-1l06pbn">
off
</code>
by default. You can enable the profiler on a
per-database or per-instance basis at one of several
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-database-profiling-level" target="_self">
<span>
profiling
levels
<!-- -->
.
</span>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
When enabled, profiling has an effect on database performance and
disk use. See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-database-profiling-overhead" target="_self">
<span>
Database Profiler Overhead
</span>
</a>
for more information.
</p>
<p class="leafygreen-ui-1kp3ins">
This page shows important administration options for the
database profiler. For additional information, see:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/database-profiler/#std-label-profiler">
Database Profiler Output
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/profile/#std-label-profile-command">
Profile Command
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.currentOp/#mongodb-method-db.currentOp">
<code class="leafygreen-ui-1l06pbn">
db.currentOp()
</code>
</a>
</p>
</li>
</ul>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Do not attempt to create a time series collection or view with the
name
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
. MongoDB 6.3 and later versions return an
<code class="leafygreen-ui-1l06pbn">
IllegalOperation
</code>
error if you attempt to do so.
<strong>
Earlier MongoDB
versions crash.
</strong>
</p>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-database-profiling-levels">
</span>
<span class="leafygreen-ui-1qnjd6d" id="std-label-database-profiling-level">
</span>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Profiling Levels
<a class="headerlink leafygreen-ui-1kepx47" href="#profiling-levels" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="profiling-levels">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The following profiling levels are available:
</p>
<dl>
<dt>
<code class="leafygreen-ui-1l06pbn">
0
</code>
</dt>
<dd class="css-1ufxuu7">
The profiler is off and does not collect any data.
This is the default profiler level.
</dd>
<dt>
<code class="leafygreen-ui-1l06pbn">
1
</code>
</dt>
<dd class="css-1ufxuu7">
<p class="leafygreen-ui-1kp3ins">
The profiler collects data for operations that exceed the
<code class="leafygreen-ui-1l06pbn">
slowms
</code>
threshold or match a specified
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#std-label-set-profiling-level-options-filter">
filter
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
When a filter is set:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
slowms
</code>
and
<code class="leafygreen-ui-1l06pbn">
sampleRate
</code>
options are not used for
profiling.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The profiler only captures operations that match the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#std-label-set-profiling-level-options-filter">
filter
<!-- -->
.
</a>
</p>
</li>
</ul>
</dd>
<dt>
<code class="leafygreen-ui-1l06pbn">
2
</code>
</dt>
<dd class="css-1ufxuu7">
The profiler collects data for all operations.
</dd>
</dl>
<span class="leafygreen-ui-1qnjd6d" id="std-label-database-profiling-enable-profiling">
</span>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Enable and Configure Database Profiling
<a class="headerlink leafygreen-ui-1kepx47" href="#enable-and-configure-database-profiling" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="enable-and-configure-database-profiling">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
You can enable database profiling for
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instances.
</p>
<p class="leafygreen-ui-1kp3ins">
This section shows how you use the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
helper method
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#mongodb-method-db.setProfilingLevel">
<code class="leafygreen-ui-1l06pbn">
db.setProfilingLevel()
</code>
</a>
to enable profiling. To use a driver
method instead, see the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
driver documentation
</span>
</a>
.
</p>
<p class="leafygreen-ui-1kp3ins">
To enable profiling for a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instance, set
the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-database-profiling-levels" target="_self">
<span>
profiling level
</span>
</a>
to a value
greater than
<code class="leafygreen-ui-1l06pbn">
0
</code>
. The profiler records data in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection. MongoDB creates the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection in a
database after you enable profiling for that database.
</p>
<p class="leafygreen-ui-1kp3ins">
To enable profiling and set the profiling level, pass the profiling
level to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#mongodb-method-db.setProfilingLevel">
<code class="leafygreen-ui-1l06pbn">
db.setProfilingLevel()
</code>
</a>
helper. For example, to
enable profiling for all database operations for the currently connected
database, run this operation in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
:
</span>
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.setProfilingLevel(2)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">setProfilingLevel</span>(<span class="lg-highlight-number">2</span>)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The shell returns the
<em>
previous
</em>
profiling level in the
<code class="leafygreen-ui-1l06pbn">
was
</code>
field
and sets the new level. In the following output, the
<code class="leafygreen-ui-1l06pbn">
"ok" :
1
</code>
key-value pair indicates the operation succeeded:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"was\" : 0, \"slowms\" : 100, \"sampleRate\" : 1.0, \"ok\" : 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1agdxuk" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"was"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"slowms"</span> <!-- -->: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-string">"sampleRate"</span> <!-- -->: <span class="lg-highlight-number">1.0</span>, <span class="lg-highlight-string">"ok"</span> <!-- -->: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To verify the new setting, see the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-database-profiling-view-status" target="_self">
<span>
Check Profiling Level
</span>
</a>
section.
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 5.0, changes made to the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-database-profiler" target="_self">
<span>
database profiler
</span>
</a>
<code class="leafygreen-ui-1l06pbn">
level
</code>
,
<code class="leafygreen-ui-1l06pbn">
slowms
</code>
,
<code class="leafygreen-ui-1l06pbn">
sampleRate
</code>
, or
<code class="leafygreen-ui-1l06pbn">
filter
</code>
using the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/profile/#mongodb-dbcommand-dbcmd.profile">
<code class="leafygreen-ui-1l06pbn">
profile
</code>
</a>
command or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#mongodb-method-db.setProfilingLevel">
<code class="leafygreen-ui-1l06pbn">
db.setProfilingLevel()
</code>
</a>
wrapper method are recorded in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--logpath">
<code class="leafygreen-ui-1l06pbn">
log file
</code>
.
</a>
</p>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Global and Per-Database Profiling Settings
<a class="headerlink leafygreen-ui-1kepx47" href="#global-and-per-database-profiling-settings" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="global-and-per-database-profiling-settings">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#std-label-set-profiling-level-options-slowms">
slowms
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#std-label-set-profiling-level-options-sampleRate">
sampleRate
</a>
profiling
settings are
<em>
global
</em>
. When set, these settings affect all databases in
your process.
</p>
<p class="leafygreen-ui-1kp3ins">
When set through the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/profile/#mongodb-dbcommand-dbcmd.profile">
<code class="leafygreen-ui-1l06pbn">
profile
</code>
</a>
command or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#mongodb-method-db.setProfilingLevel">
<code class="leafygreen-ui-1l06pbn">
db.setProfilingLevel()
</code>
</a>
shell helper method,
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-database-profiling-level" target="_self">
<span>
profiling
level
</span>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#std-label-set-profiling-level-options-filter">
filter
</a>
settings are set at the
<em>
database
</em>
level. When set as either command line or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#std-label-configuration-options">
configuration
file
</a>
options, profiling level and
<code class="leafygreen-ui-1l06pbn">
filter
</code>
settings affect the entire process.
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-database-profiling-specify-slowms-threshold">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Specify the Threshold for Slow Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#specify-the-threshold-for-slow-operations" title="Permalink to this heading">
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<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="specify-the-threshold-for-slow-operations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
By default, the slow operation threshold is 100 milliseconds.
</p>
<p class="leafygreen-ui-1kp3ins">
Slow operations are logged based on
<code class="leafygreen-ui-1l06pbn">
workingMillis
</code>
, which is the
amount of time that MongoDB spends working on that operation. This means
that factors such as waiting for locks and flow control do not affect
whether an operation exceeds the slow operation threshold.
</p>
<p class="leafygreen-ui-1kp3ins">
To change the slow operation threshold, specify the required threshold
value in one of the following ways:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Set the value of
<code class="leafygreen-ui-1l06pbn">
slowms
</code>
using the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/profile/#mongodb-dbcommand-dbcmd.profile">
<code class="leafygreen-ui-1l06pbn">
profile
</code>
</a>
command or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#mongodb-method-db.setProfilingLevel">
<code class="leafygreen-ui-1l06pbn">
db.setProfilingLevel()
</code>
</a>
shell helper method.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Set the value of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--slowms">
<code class="leafygreen-ui-1l06pbn">
--slowms
</code>
</a>
from the command line at startup.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Set the value of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-operationProfiling.slowOpThresholdMs">
<code class="leafygreen-ui-1l06pbn">
slowOpThresholdMs
</code>
</a>
in a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#std-label-configuration-options">
configuration file
<!-- -->
.
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
The following example sets the profiling level for the
currently connected database to
<code class="leafygreen-ui-1l06pbn">
1
</code>
and sets the slow
operation threshold for the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instance to
<code class="leafygreen-ui-1l06pbn">
20
</code>
milliseconds:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.setProfilingLevel( 1, { slowms: 20 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">setProfilingLevel</span>( <span class="lg-highlight-number">1</span>, <!-- -->{ <span class="lg-highlight-attr">slowms</span>: <span class="lg-highlight-number">20</span> } )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
A profiling level of
<code class="leafygreen-ui-1l06pbn">
1
</code>
causes the profiler to record operations
slower than the
<code class="leafygreen-ui-1l06pbn">
slowms
</code>
threshold.
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
The slow operation threshold applies to all databases in a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instance. It is used by both the database profiler
and the diagnostic log and should be set to the highest useful value to
avoid performance degradation.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
You can use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#mongodb-method-db.setProfilingLevel">
<code class="leafygreen-ui-1l06pbn">
db.setProfilingLevel()
</code>
</a>
to configure
<code class="leafygreen-ui-1l06pbn">
slowms
</code>
and
<code class="leafygreen-ui-1l06pbn">
sampleRate
</code>
for
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
.
For the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
, the
<code class="leafygreen-ui-1l06pbn">
slowms
</code>
and
<code class="leafygreen-ui-1l06pbn">
sampleRate
</code>
configuration settings only affect the diagnostic log and not the
profiler since profiling is not available on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
.
<a class="footnote-reference header-buffer" href="#footnote-mongos-systemlog" id="ref-mongos-systemlog-id1">
[
<!-- -->
1
<!-- -->
]
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The following example sets a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
instance's slow
operation threshold for logging slow operations to
<code class="leafygreen-ui-1l06pbn">
20
</code>
:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.setProfilingLevel( 0, { slowms: 20 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">setProfilingLevel</span>( <span class="lg-highlight-number">0</span>, <!-- -->{ <span class="lg-highlight-attr">slowms</span>: <span class="lg-highlight-number">20</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-database-profiler" target="_self">
<span>
profiler entries
</span>
</a>
and the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/log-messages/#std-label-log-message-slow-ops">
diagnostic log messages (i.e. mongod/mongos logmessages)
</a>
for read/write operations include:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
planCacheShapeHash
</code>
to help identify slow queries with the same
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-plan-cache-query-shape">
plan cache query shape
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
Starting in MongoDB 8.0, the pre-existing
<code class="leafygreen-ui-1l06pbn">
queryHash
</code>
field is renamed
to
<code class="leafygreen-ui-1l06pbn">
planCacheShapeHash
</code>
. If you're using an earlier MongoDB version,
you'll see
<code class="leafygreen-ui-1l06pbn">
queryHash
</code>
instead of
<code class="leafygreen-ui-1l06pbn">
planCacheShapeHash
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<code class="leafygreen-ui-1l06pbn">
planCacheKey
</code>
to provide more insight into the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/query-plans/">
query plan
cache
</a>
for slow queries.
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
Secondary members of a replica set now
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/replica-set-oplog/#std-label-slow-oplog-application">
log oplog entries
</a>
that take longer than the slow operation
threshold to apply. These slow oplog messages:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Are logged for the secondaries in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--logpath">
<code class="leafygreen-ui-1l06pbn">
diagnostic log
</code>
.
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Are logged under the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/log-messages/#mongodb-data-REPL">
<code class="leafygreen-ui-1l06pbn">
REPL
</code>
</a>
component with the text
<code class="leafygreen-ui-1l06pbn">
applied op: <oplog entry> took <num>ms
</code>
.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Do not depend on the log levels (either at the system or component
level)
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Do not depend on the profiling level.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Are affected by
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-operationProfiling.slowOpSampleRate">
<code class="leafygreen-ui-1l06pbn">
slowOpSampleRate
</code>
.
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
The profiler does not capture slow oplog entries.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Profile a Random Sample of Slow Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#profile-a-random-sample-of-slow-operations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="profile-a-random-sample-of-slow-operations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To profile only a randomly sampled subset of all
<em>
slow
</em>
operations,
specify the desired sample rate in one of the following ways:
<a class="footnote-reference header-buffer" href="#footnote-slow-oplogs" id="ref-slow-oplogs-id2">
[
<!-- -->
2
<!-- -->
]
</a>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Set the value of
<code class="leafygreen-ui-1l06pbn">
sampleRate
</code>
using the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/profile/#mongodb-dbcommand-dbcmd.profile">
<code class="leafygreen-ui-1l06pbn">
profile
</code>
</a>
command
or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#mongodb-method-db.setProfilingLevel">
<code class="leafygreen-ui-1l06pbn">
db.setProfilingLevel()
</code>
</a>
shell helper method.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Set the value of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--slowOpSampleRate">
<code class="leafygreen-ui-1l06pbn">
--slowOpSampleRate
</code>
</a>
for
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
or
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-option-mongos.--slowOpSampleRate">
<code class="leafygreen-ui-1l06pbn">
--slowOpSampleRate
</code>
</a>
for
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
from the command line at startup.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Set the value of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-operationProfiling.slowOpSampleRate">
<code class="leafygreen-ui-1l06pbn">
slowOpSampleRate
</code>
</a>
in a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#std-label-configuration-options">
configuration file
<!-- -->
.
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
By default,
<code class="leafygreen-ui-1l06pbn">
sampleRate
</code>
is set to
<code class="leafygreen-ui-1l06pbn">
1.0
</code>
, meaning all
<em>
slow
</em>
operations are profiled. When
<code class="leafygreen-ui-1l06pbn">
sampleRate
</code>
is set between
<code class="leafygreen-ui-1l06pbn">
0
</code>
and
<code class="leafygreen-ui-1l06pbn">
1
</code>
,
databases with a profiling level
<code class="leafygreen-ui-1l06pbn">
1
</code>
only profile a randomly sampled
percentage of
<em>
slow
</em>
operations based on
<code class="leafygreen-ui-1l06pbn">
sampleRate
</code>
.
</p>
<p class="leafygreen-ui-1kp3ins">
The following example sets the profiling level for the currently
connected database to
<code class="leafygreen-ui-1l06pbn">
1
</code>
and sets the profiler to sample 42% of all
<em>
slow
</em>
operations:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.setProfilingLevel( 1, { sampleRate: 0.42 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">setProfilingLevel</span>( <span class="lg-highlight-number">1</span>, <!-- -->{ <span class="lg-highlight-attr">sampleRate</span>: <span class="lg-highlight-number">0.42</span> } )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The modified sample rate value also applies to the system log.
</p>
<p class="leafygreen-ui-1kp3ins">
You can use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#mongodb-method-db.setProfilingLevel">
<code class="leafygreen-ui-1l06pbn">
db.setProfilingLevel()
</code>
</a>
to configure
<code class="leafygreen-ui-1l06pbn">
slowms
</code>
and
<code class="leafygreen-ui-1l06pbn">
sampleRate
</code>
for
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
.
For the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
, the
<code class="leafygreen-ui-1l06pbn">
slowms
</code>
and
<code class="leafygreen-ui-1l06pbn">
sampleRate
</code>
configuration settings only affect the diagnostic log
and not the profiler because profiling isn't available on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
.
<a class="footnote-reference header-buffer" href="#footnote-mongos-systemlog" id="ref-mongos-systemlog-id3">
[
<!-- -->
1
<!-- -->
]
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
For example, the following sets a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
instance's
sampling rate for logging slow operations:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.setProfilingLevel( 0, { sampleRate: 0.42 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">setProfilingLevel</span>( <span class="lg-highlight-number">0</span>, <!-- -->{ <span class="lg-highlight-attr">sampleRate</span>: <span class="lg-highlight-number">0.42</span> } )</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
When
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.logLevel">
<code class="leafygreen-ui-1l06pbn">
logLevel
</code>
</a>
is set to
<code class="leafygreen-ui-1l06pbn">
0
</code>
, MongoDB records
<em>
slow
</em>
operations to the diagnostic log at a rate determined by
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-operationProfiling.slowOpSampleRate">
<code class="leafygreen-ui-1l06pbn">
slowOpSampleRate
</code>
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
At higher
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.logLevel">
<code class="leafygreen-ui-1l06pbn">
logLevel
</code>
</a>
settings, all operations appear in
the diagnostic log regardless of their latency with the following
exception: the logging of slow oplog entry messages by the
secondaries. The secondaries log only the slow oplog
entries; increasing the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.logLevel">
<code class="leafygreen-ui-1l06pbn">
logLevel
</code>
</a>
does not log all
oplog entries.
</p>
</div>
</div>
<table class="header-buffer leafygreen-ui-rbqgrl" frame="void" id="footnote-mongos-systemlog" rules="none">
<colgroup>
<col/>
</colgroup>
<tbody valign="top">
<tr>
<td class="leafygreen-ui-17r2xs0">
[
<!-- -->
1
<!-- -->
]
</td>
<td class="leafygreen-ui-17r2xs0">
<em>
(
<a href="#ref-mongos-systemlog-id1">
1
</a>
,
<a href="#ref-mongos-systemlog-id3">
2
</a>
)
</em>
<!-- -->
See
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-db-profiling-sharding" target="_self">
<span>
Database Profiling and Sharding
<!-- -->
.
</span>
</a>
</td>
</tr>
</tbody>
</table>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Set a Filter to Determine Profiled Operations
<a class="headerlink leafygreen-ui-1kepx47" href="#set-a-filter-to-determine-profiled-operations" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="set-a-filter-to-determine-profiled-operations">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
You can set a filter to control which operations are profiled and
logged. You can set the profiling filter in one of the following ways:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Set the value of
<code class="leafygreen-ui-1l06pbn">
filter
</code>
using the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/profile/#mongodb-dbcommand-dbcmd.profile">
<code class="leafygreen-ui-1l06pbn">
profile
</code>
</a>
command
or the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#mongodb-method-db.setProfilingLevel">
<code class="leafygreen-ui-1l06pbn">
db.setProfilingLevel()
</code>
</a>
shell helper method.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Set the value of
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-operationProfiling.filter">
<code class="leafygreen-ui-1l06pbn">
filter
</code>
</a>
in a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#std-label-configuration-options">
configuration file
<!-- -->
.
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instances, the
<code class="leafygreen-ui-1l06pbn">
filter
</code>
affects both the
diagnostic log and, if enabled, the profiler.
</p>
<p class="leafygreen-ui-1kp3ins">
For
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
instances, the
<code class="leafygreen-ui-1l06pbn">
filter
</code>
affects the
diagnostic log only and not the profiler since profiling is not
available on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
.
</a>
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
When a profiling
<code class="leafygreen-ui-1l06pbn">
filter
</code>
is set, the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#std-label-set-profiling-level-options-slowms">
slowms
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#std-label-set-profiling-level-options-sampleRate">
sampleRate
</a>
options do not affect the
diagnostic log or the profiler.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#mongodb-method-db.setProfilingLevel">
<code class="leafygreen-ui-1l06pbn">
db.setProfilingLevel()
</code>
</a>
example sets
the profile level for the currently connected database:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#std-label-set-profiling-level-level">
profiling level
</a>
to
<code class="leafygreen-ui-1l06pbn">
2
</code>
,
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.setProfilingLevel/#std-label-set-profiling-level-options-filter">
filter
</a>
of
<code class="leafygreen-ui-1l06pbn">
{ op: "query", millis: { $gt: 2000 } }
</code>
, which causes the profiler
to only log
<code class="leafygreen-ui-1l06pbn">
query
</code>
operations that took longer than 2 seconds.
</p>
</li>
</ul>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.setProfilingLevel( 2, { filter: { op: \"query\", millis: { $gt: 2000 } } } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">setProfilingLevel</span>( <span class="lg-highlight-number">2</span>, <!-- -->{ <span class="lg-highlight-attr">filter</span>: <!-- -->{ <span class="lg-highlight-attr">op</span>: <span class="lg-highlight-string">"query"</span>, <span class="lg-highlight-attr">millis</span>: <!-- -->{ <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-number">2000</span> } } } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-database-profiling-view-status">
</span>
<span class="leafygreen-ui-1qnjd6d" id="std-label-database-profiling-check-level">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Check Profiling Level
<a class="headerlink leafygreen-ui-1kepx47" href="#check-profiling-level" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="check-profiling-level">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To view the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-database-profiling-levels" target="_self">
<span>
profiling level
</span>
</a>
, run
the following example in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
:
</span>
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.getProfilingStatus()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">getProfilingStatus</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The shell returns a document similar to the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"was\" : 0, \"slowms\" : 100, \"sampleRate\" : 1.0, \"ok\" : 1 }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"was"</span> <!-- -->: <span class="lg-highlight-number">0</span>, <span class="lg-highlight-string">"slowms"</span> <!-- -->: <span class="lg-highlight-number">100</span>, <span class="lg-highlight-string">"sampleRate"</span> <!-- -->: <span class="lg-highlight-number">1.0</span>, <span class="lg-highlight-string">"ok"</span> <!-- -->: <span class="lg-highlight-number">1</span> }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
was
</code>
field indicates the current profiling level.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
slowms
</code>
field indicates operation time threshold, in
milliseconds, beyond which operations are considered
<em>
slow
</em>
.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
sampleRate
</code>
field indicates the percentage of
<em>
slow
</em>
operations
that should be profiled.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Disable Profiling
<a class="headerlink leafygreen-ui-1kepx47" href="#disable-profiling" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="disable-profiling">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To disable profiling, run the following example in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
:
</span>
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.setProfilingLevel(0)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">setProfilingLevel</span>(<span class="lg-highlight-number">0</span>)</td></tr></tbody></table></code></pre>
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<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
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</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Disabling profiling can improve database performance and lower disk
use. For more information, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-database-profiling-overhead" target="_self">
<span>
Database Profiler
Overhead
</span>
</a>
.
</p>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Enable Profiling for an Entire
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
Instance
<a class="headerlink leafygreen-ui-1kepx47" href="#enable-profiling-for-an-entire-mongod-instance" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="enable-profiling-for-an-entire-mongod-instance">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
For development and test environments, you can enable
database profiling for an entire
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instance. The
profiling level applies to all databases provided by the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instance.
</p>
<p class="leafygreen-ui-1kp3ins">
To enable profiling for a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instance, pass the following
options to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
at startup.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"mongod --profile 1 --slowms 15 --slowOpSampleRate 0.5","programmingLanguage":"Bash"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light bash leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">mongod --profile 1 --slowms 15 --slowOpSampleRate 0.5</td></tr></tbody></table></code></pre>
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Alternatively, you can specify
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#std-label-operation-profiling-configuration-options">
operationProfiling
</a>
in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/">
configuration
file
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
This sets the profiling level to
<code class="leafygreen-ui-1l06pbn">
1
</code>
, defines slow operations as those
that last longer than
<code class="leafygreen-ui-1l06pbn">
15
</code>
milliseconds, and specifies that only 50%
of
<em>
slow
</em>
operations should be profiled.
<a class="footnote-reference header-buffer" href="#footnote-slow-oplogs" id="ref-slow-oplogs-id4">
[
<!-- -->
2
<!-- -->
]
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
slowms
</code>
and
<code class="leafygreen-ui-1l06pbn">
slowOpSampleRate
</code>
also affect the operations that
are recorded in the diagnostic log when
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/parameters/#mongodb-parameter-param.logLevel">
<code class="leafygreen-ui-1l06pbn">
logLevel
</code>
</a>
is set to
<code class="leafygreen-ui-1l06pbn">
0
</code>
. The
<code class="leafygreen-ui-1l06pbn">
slowms
</code>
and
<code class="leafygreen-ui-1l06pbn">
slowOpSampleRate
</code>
are also available to
configure diagnostic logging for
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
.
<a class="footnote-reference header-buffer" href="#footnote-slow-oplogs" id="ref-slow-oplogs-id5">
[
<!-- -->
2
<!-- -->
]
</a>
</p>
<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-operationProfiling.mode">
<code class="leafygreen-ui-1l06pbn">
mode
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-operationProfiling.slowOpThresholdMs">
<code class="leafygreen-ui-1l06pbn">
slowOpThresholdMs
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-operationProfiling.slowOpSampleRate">
<code class="leafygreen-ui-1l06pbn">
slowOpSampleRate
</code>
</a>
</p>
</li>
</ul>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-db-profiling-sharding">
</span>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Database Profiling and Sharding
<a class="headerlink leafygreen-ui-1kepx47" href="#database-profiling-and-sharding" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="database-profiling-and-sharding">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
You
<em>
cannot
</em>
enable profiling on a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
instance. To enable
profiling in a sharded cluster, you must enable profiling for each
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#mongodb-binary-bin.mongod">
<code class="leafygreen-ui-1l06pbn">
mongod
</code>
</a>
instance in the cluster.
</p>
<p class="leafygreen-ui-1kp3ins">
However, you can set the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-option-mongos.--slowms">
<code class="leafygreen-ui-1l06pbn">
--slowms
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#std-option-mongos.--slowOpSampleRate">
<code class="leafygreen-ui-1l06pbn">
slowOpSampleRate
</code>
</a>
on
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongos/#mongodb-binary-bin.mongos">
<code class="leafygreen-ui-1l06pbn">
mongos
</code>
</a>
to configure the diagnostic log for slow operations.
</p>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
View Profiler Data
<a class="headerlink leafygreen-ui-1kepx47" href="#view-profiler-data" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="view-profiler-data">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
The database profiler logs information about database operations in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection.
</p>
<p class="leafygreen-ui-1kp3ins">
To view profiling information, query the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection. To view example queries, see
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-database-profiling-example-queries" target="_self">
<span>
Example Profiler Data Queries
</span>
</a>
. For an explanation of the
output data, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/database-profiler/">
Database Profiler Output
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
It is no longer possible to perform any operation, including reads, on the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection from within a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions">
transaction
<!-- -->
.
</a>
</p>
<span class="leafygreen-ui-1qnjd6d" id="std-label-database-profiling-example-queries">
</span>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Example Profiler Data Queries
<a class="headerlink leafygreen-ui-1kepx47" href="#example-profiler-data-queries" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example-profiler-data-queries">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
This section shows example queries on the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection. For query output details, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/database-profiler/">
Database Profiler Output
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
To return the most recent 10 log entries in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection, run a query similar to the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.system.profile.find().limit(10).sort( { ts : -1 } ).pretty()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">system</span>.<span class="lg-highlight-property">profile</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->).<span class="lg-highlight-title lg-highlight-function">limit</span>(<span class="lg-highlight-number">10</span>).<span class="lg-highlight-title lg-highlight-function">sort</span>( <!-- -->{ <!-- -->ts <!-- -->: <!-- -->-<span class="lg-highlight-number">1</span> } ).<span class="lg-highlight-title lg-highlight-function">pretty</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To return all operations except command operations (
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term--cmd">
$cmd
</a>
), run a query
similar to the following:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.system.profile.find( { op: { $ne : 'command' } } ).pretty()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">system</span>.<span class="lg-highlight-property">profile</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <span class="lg-highlight-attr">op</span>: <!-- -->{ <!-- -->$ne<!-- --> <!-- -->: <span class="lg-highlight-string">'command'</span> } } ).<span class="lg-highlight-title lg-highlight-function">pretty</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To return operations for a particular collection, run a query similar to
the following. This example returns operations in the
<code class="leafygreen-ui-1l06pbn">
mydb
</code>
database's
<code class="leafygreen-ui-1l06pbn">
test
</code>
collection:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.system.profile.find( { ns : 'mydb.test' } ).pretty()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">system</span>.<span class="lg-highlight-property">profile</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <!-- -->ns <!-- -->: <span class="lg-highlight-string">'mydb.test'</span> } ).<span class="lg-highlight-title lg-highlight-function">pretty</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To return operations that take longer than 5 milliseconds to complete,
run:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.system.profile.find( { millis : { $gt : 5 } } ).pretty()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">system</span>.<span class="lg-highlight-property">profile</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{ <!-- -->millis <!-- -->: <!-- -->{ <!-- -->$gt<!-- --> <!-- -->: <span class="lg-highlight-number">5</span> } } ).<span class="lg-highlight-title lg-highlight-function">pretty</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
To return operations for a specific time range, run:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.system.profile.find( {\n ts : {\n $gt: new ISODate(\"2012-12-09T03:00:00Z\"),\n $lt: new ISODate(\"2012-12-09T03:40:00Z\")\n }\n} ).pretty()","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">system</span>.<span class="lg-highlight-property">profile</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->ts <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2012-12-09T03:00:00Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$lt</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2012-12-09T03:40:00Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} ).<span class="lg-highlight-title lg-highlight-function">pretty</span>(<!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The following example looks at the time range, suppresses the
<code class="leafygreen-ui-1l06pbn">
user
</code>
field from the output to make it easier to read, and sorts the results
by how long each operation took to run:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.system.profile.find( {\n ts : {\n $gt: new ISODate(\"2011-07-12T03:00:00Z\"),\n $lt: new ISODate(\"2011-07-12T03:40:00Z\")\n }\n}, { user: 0 } ).sort( { millis: -1 } )","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-11itue3" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">system</span>.<span class="lg-highlight-property">profile</span>.<span class="lg-highlight-title lg-highlight-function">find</span>( <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->ts <!-- -->: <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$gt</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2011-07-12T03:00:00Z"</span>)<!-- -->,</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-attr">$lt</span>: <span class="lg-highlight-keyword">new</span> <span class="lg-highlight-title lg-highlight-class">ISODate</span>(<span class="lg-highlight-string">"2011-07-12T03:40:00Z"</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}<!-- -->, <!-- -->{ <span class="lg-highlight-attr">user</span>: <span class="lg-highlight-number">0</span> } ).<span class="lg-highlight-title lg-highlight-function">sort</span>( <!-- -->{ <span class="lg-highlight-attr">millis</span>: <!-- -->-<span class="lg-highlight-number">1</span> } )</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Show the Five Most Recent Events
<a class="headerlink leafygreen-ui-1kepx47" href="#show-the-five-most-recent-events" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="show-the-five-most-recent-events">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
On a database that has profiling enabled, the
<code class="leafygreen-ui-1l06pbn">
show profile
</code>
helper
in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
displays the 5 most recent operations
that took at least 1 millisecond to execute. Run
<code class="leafygreen-ui-1l06pbn">
show profile
</code>
from
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
:
</span>
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"show profile","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">show profile</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
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</button>
</div>
</div>
</div>
</div>
<span class="leafygreen-ui-1qnjd6d" id="std-label-database-profiling-overhead">
</span>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Profiler Overhead
<a class="headerlink leafygreen-ui-1kepx47" href="#profiler-overhead" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="profiler-overhead">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
When enabled, profiling has an effect on database performance,
especially when configured with a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-database-profiling-level" target="_self">
<span>
profiling level
</span>
</a>
of 2, or when using a
low
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#std-label-database-profiling-specify-slowms-threshold" target="_self">
<span>
threshold
</span>
</a>
value
with a profiling level of 1.
</p>
<p class="leafygreen-ui-1kp3ins">
Profiling also uses disk space, because profiling
writes logs to the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection and the MongoDB
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--logpath">
<code class="leafygreen-ui-1l06pbn">
logfile
</code>
.
</a>
</p>
<div class="leafygreen-ui-1sjx7ru" role="note">
<h2 class="leafygreen-ui-29m78u">
Warning
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Consider performance and storage implications before
you enable the profiler in a production deployment.
</p>
</div>
</div>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
The
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
Collection
<a class="headerlink leafygreen-ui-1kepx47" href="#the-system.profile-collection" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="the-system.profile-collection">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection is a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-capped-collection">
capped collection
</a>
with a default size of 1 megabyte. A
collection of this size can typically store several thousand profile
documents, but some applications may use more or less profiling data per
operation. If you need to change the size of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection, follow
the steps below.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Change Size of
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
Collection on the Primary
<a class="headerlink leafygreen-ui-1kepx47" href="#change-size-of-system.profile-collection-on-the-primary" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="change-size-of-system.profile-collection-on-the-primary">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To change the size of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection on the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-primary">
primary
</a>
, you
must:
</p>
<ol class="leafygreen-ui-rioki0" type="1">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Disable profiling.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Drop the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Create a new
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
Re-enable profiling.
</p>
</li>
</ol>
<p class="leafygreen-ui-1kp3ins">
For example, to create a new
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection that is
<code class="leafygreen-ui-1l06pbn">
4000000
</code>
bytes
(4 MB), use the following sequence of operations in
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
:
</span>
</a>
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.setProfilingLevel(0)\n\ndb.system.profile.drop()\n\ndb.createCollection( \"system.profile\", { capped: true, size:4000000 } )\n\ndb.setProfilingLevel(1)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">setProfilingLevel</span>(<span class="lg-highlight-number">0</span>)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">system</span>.<span class="lg-highlight-property">profile</span>.<span class="lg-highlight-title lg-highlight-function">drop</span>(<!-- -->)</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">createCollection</span>( <span class="lg-highlight-string">"system.profile"</span>, <!-- -->{ <span class="lg-highlight-attr">capped</span>: <span class="lg-highlight-literal">true</span>, <span class="lg-highlight-attr">size</span>:<span class="lg-highlight-number">4000000</span> } )</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-title lg-highlight-function">setProfilingLevel</span>(<span class="lg-highlight-number">1</span>)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Change Size of
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
Collection on a Secondary
<a class="headerlink leafygreen-ui-1kepx47" href="#change-size-of-system.profile-collection-on-a-secondary" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="change-size-of-system.profile-collection-on-a-secondary">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
To change the size of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/system-collections/#mongodb-data--database-.system.profile">
<code class="leafygreen-ui-1l06pbn">
system.profile
</code>
</a>
collection on a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-secondary">
secondary
</a>
, you must
stop the secondary, run it as a standalone, and then perform the steps
above. When done, restart the standalone as a member of the replica set.
For more information, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/perform-maintence-on-replica-set-members/">
Perform Maintenance on Self-Managed Replica Set Members
<!-- -->
.
</a>
</p>
<table class="header-buffer leafygreen-ui-rbqgrl" frame="void" id="footnote-slow-oplogs" rules="none">
<colgroup>
<col/>
</colgroup>
<tbody valign="top">
<tr>
<td class="leafygreen-ui-17r2xs0">
[
<!-- -->
2
<!-- -->
]
</td>
<td class="leafygreen-ui-17r2xs0">
<em>
(
<a href="#ref-slow-oplogs-id2">
1
</a>
,
<a href="#ref-slow-oplogs-id4">
2
</a>
,
<a href="#ref-slow-oplogs-id5">
3
</a>
)
</em>
<!-- -->
Secondary members of a replica set now
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/replica-set-oplog/#std-label-slow-oplog-application">
log oplog entries
</a>
that take longer than the slow operation
threshold to apply. These slow oplog messages:
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
Are logged for the secondaries in the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/program/mongod/#std-option-mongod.--logpath">
<code class="leafygreen-ui-1l06pbn">
diagnostic log
</code>
.
</a>
</li>
<li class="leafygreen-ui-d7p7b6">
Are logged under the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/log-messages/#mongodb-data-REPL">
<code class="leafygreen-ui-1l06pbn">
REPL
</code>
</a>
component with the text
<code class="leafygreen-ui-1l06pbn">
applied op: <oplog entry> took <num>ms
</code>
.
</li>
<li class="leafygreen-ui-d7p7b6">
Do not depend on the log levels (either at the system or component
level)
</li>
<li class="leafygreen-ui-d7p7b6">
Do not depend on the profiling level.
</li>
<li class="leafygreen-ui-d7p7b6">
Are affected by
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/configuration-options/#mongodb-setting-operationProfiling.slowOpSampleRate">
<code class="leafygreen-ui-1l06pbn">
slowOpSampleRate
</code>
.
</a>
</li>
</ul>
The profiler does not capture slow oplog entries.
</td>
</tr>
</tbody>
</table>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/indexes/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Indexing Reference
<a class="headerlink leafygreen-ui-1kepx47" href="#indexing-reference" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="indexing-reference">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#indexing-methods-in-mongosh" target="_self">
<span>
Indexing Methods in
<code class="css-1kekw28 e1wawog0">
mongosh
</code>
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#indexing-database-commands" target="_self">
<span>
Indexing Database Commands
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#geospatial-query-selectors" target="_self">
<span>
Geospatial Query Selectors
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Indexing Methods in
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#indexing-methods-in-mongosh" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
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<div class="css-1btu0w3 evvkmar0" id="indexing-methods-in-mongosh">
</div>
</a>
</h2>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:30%"/>
<col style="width:70%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Name
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.createIndex/#mongodb-method-db.collection.createIndex">
<code class="leafygreen-ui-1l06pbn">
db.collection.createIndex()
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Builds an index on a collection.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.dropIndex/#mongodb-method-db.collection.dropIndex">
<code class="leafygreen-ui-1l06pbn">
db.collection.dropIndex()
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Removes a specified index on a collection.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.dropIndexes/#mongodb-method-db.collection.dropIndexes">
<code class="leafygreen-ui-1l06pbn">
db.collection.dropIndexes()
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Removes all indexes on a collection.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.getIndexes/#mongodb-method-db.collection.getIndexes">
<code class="leafygreen-ui-1l06pbn">
db.collection.getIndexes()
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns an array of documents that describe the existing indexes on a collection.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.reIndex/#mongodb-method-db.collection.reIndex">
<code class="leafygreen-ui-1l06pbn">
db.collection.reIndex()
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Rebuilds all existing indexes on a collection.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.totalIndexSize/#mongodb-method-db.collection.totalIndexSize">
<code class="leafygreen-ui-1l06pbn">
db.collection.totalIndexSize()
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Reports the total size used by the indexes on a collection. Provides a wrapper around the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collStats/#mongodb-data-collStats.totalIndexSize">
<code class="leafygreen-ui-1l06pbn">
totalIndexSize
</code>
</a>
field of the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/collStats/#mongodb-dbcommand-dbcmd.collStats">
<code class="leafygreen-ui-1l06pbn">
collStats
</code>
</a>
output.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.explain/#mongodb-method-cursor.explain">
<code class="leafygreen-ui-1l06pbn">
cursor.explain()
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Reports on the query execution plan for a cursor.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.hint/#mongodb-method-cursor.hint">
<code class="leafygreen-ui-1l06pbn">
cursor.hint()
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Forces MongoDB to use a specific index for a query.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.max/#mongodb-method-cursor.max">
<code class="leafygreen-ui-1l06pbn">
cursor.max()
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Specifies an exclusive upper index bound for a cursor. For use with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.hint/#mongodb-method-cursor.hint">
<code class="leafygreen-ui-1l06pbn">
cursor.hint()
</code>
</a>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.min/#mongodb-method-cursor.min">
<code class="leafygreen-ui-1l06pbn">
cursor.min()
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Specifies an inclusive lower index bound for a cursor. For use with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.hint/#mongodb-method-cursor.hint">
<code class="leafygreen-ui-1l06pbn">
cursor.hint()
</code>
</a>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Indexing Database Commands
<a class="headerlink leafygreen-ui-1kepx47" href="#indexing-database-commands" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="indexing-database-commands">
</div>
</a>
</h2>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:30%"/>
<col style="width:70%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Name
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/createIndexes/#mongodb-dbcommand-dbcmd.createIndexes">
<code class="leafygreen-ui-1l06pbn">
createIndexes
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Builds one or more indexes for a collection.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/dropIndexes/#mongodb-dbcommand-dbcmd.dropIndexes">
<code class="leafygreen-ui-1l06pbn">
dropIndexes
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Removes indexes from a collection.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/compact/#mongodb-dbcommand-dbcmd.compact">
<code class="leafygreen-ui-1l06pbn">
compact
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Defragments a collection and rebuilds the indexes.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/reIndex/#mongodb-dbcommand-dbcmd.reIndex">
<code class="leafygreen-ui-1l06pbn">
reIndex
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Rebuilds all indexes on a collection.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/validate/#mongodb-dbcommand-dbcmd.validate">
<code class="leafygreen-ui-1l06pbn">
validate
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Internal command that scans for a collection's data and indexes for correctness.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/geoSearch/#mongodb-dbcommand-dbcmd.geoSearch">
<code class="leafygreen-ui-1l06pbn">
geoSearch
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<em>
Removed in MongoDB 5.0.
</em>
Performs a geospatial query that uses
MongoDB's haystack index functionality.
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/setIndexCommitQuorum/#mongodb-dbcommand-dbcmd.setIndexCommitQuorum">
<code class="leafygreen-ui-1l06pbn">
setIndexCommitQuorum
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Changes the minimum number of data-bearing members (i.e commit
quorum), including the primary, that must vote to commit an
in-progress
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/index-creation/#std-label-index-operations-replicated-build">
index build
</a>
before the primary marks
those indexes as ready.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Geospatial Query Selectors
<a class="headerlink leafygreen-ui-1kepx47" href="#geospatial-query-selectors" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="geospatial-query-selectors">
</div>
</a>
</h2>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:30%"/>
<col style="width:70%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Name
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/geoWithin/#mongodb-query-op.-geoWithin">
<code class="leafygreen-ui-1l06pbn">
$geoWithin
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Selects geometries within a bounding
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/geojson/#std-label-geospatial-indexes-store-geojson">
GeoJSON geometry
</a>
. The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2dsphere/#std-label-2dsphere-index">
2dsphere
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2d/#std-label-2d-index">
2d
</a>
indexes support
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/geoWithin/#mongodb-query-op.-geoWithin">
<code class="leafygreen-ui-1l06pbn">
$geoWithin
</code>
.
</a>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/geoIntersects/#mongodb-query-op.-geoIntersects">
<code class="leafygreen-ui-1l06pbn">
$geoIntersects
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Selects geometries that intersect with a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/glossary/#std-term-GeoJSON">
GeoJSON
</a>
geometry.
The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2dsphere/#std-label-2dsphere-index">
2dsphere
</a>
index supports
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/geoIntersects/#mongodb-query-op.-geoIntersects">
<code class="leafygreen-ui-1l06pbn">
$geoIntersects
</code>
.
</a>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/near/#mongodb-query-op.-near">
<code class="leafygreen-ui-1l06pbn">
$near
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns geospatial objects in proximity to a point.
Requires a geospatial index. The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2dsphere/#std-label-2dsphere-index">
2dsphere
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2d/#std-label-2d-index">
2d
</a>
indexes support
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/near/#mongodb-query-op.-near">
<code class="leafygreen-ui-1l06pbn">
$near
</code>
.
</a>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/nearSphere/#mongodb-query-op.-nearSphere">
<code class="leafygreen-ui-1l06pbn">
$nearSphere
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Returns geospatial objects in proximity to a point on a sphere.
Requires a geospatial index. The
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2dsphere/#std-label-2dsphere-index">
2dsphere
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/indexes/index-types/geospatial/2d/#std-label-2d-index">
2d
</a>
indexes support
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/nearSphere/#mongodb-query-op.-nearSphere">
<code class="leafygreen-ui-1l06pbn">
$nearSphere
</code>
.
</a>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/operator/query-bitwise/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Bitwise Query Operators
<a class="headerlink leafygreen-ui-1kepx47" href="#bitwise-query-operators" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="bitwise-query-operators">
</div>
</a>
</h1>
<p class="leafygreen-ui-1kp3ins">
Bitwise operators return data based on bit position conditions.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
For details on a specific operator, including syntax and examples,
click on the link to the operator's reference page.
</p>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:30%"/>
<col style="width:70%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Name
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/bitsAllClear/#mongodb-query-op.-bitsAllClear">
<code class="leafygreen-ui-1l06pbn">
$bitsAllClear
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Matches numeric or binary values in which a set of bit positions
<em>
all
</em>
have a value of
<code class="leafygreen-ui-1l06pbn">
0
</code>
.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/bitsAllSet/#mongodb-query-op.-bitsAllSet">
<code class="leafygreen-ui-1l06pbn">
$bitsAllSet
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Matches numeric or binary values in which a set of bit positions
<em>
all
</em>
have a value of
<code class="leafygreen-ui-1l06pbn">
1
</code>
.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/bitsAnyClear/#mongodb-query-op.-bitsAnyClear">
<code class="leafygreen-ui-1l06pbn">
$bitsAnyClear
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Matches numeric or binary values in which
<em>
any
</em>
bit from a set of bit positions has a value of
<code class="leafygreen-ui-1l06pbn">
0
</code>
.
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/bitsAnySet/#mongodb-query-op.-bitsAnySet">
<code class="leafygreen-ui-1l06pbn">
$bitsAnySet
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
Matches numeric or binary values in which
<em>
any
</em>
bit from a set of bit positions has a value of
<code class="leafygreen-ui-1l06pbn">
1
</code>
.
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/cursor.limit/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
cursor.limit()
<a class="headerlink leafygreen-ui-1kepx47" href="#cursor.limit--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="cursor.limit--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
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<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
cursor.limit()
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-cursor.limit" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-cursor.limit">
</div>
</a>
</dt>
<dd>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
mongosh Method
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This page documents a
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/mongodb-shell/#mongodb-binary-bin.mongosh" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
mongosh
</code>
</span>
</a>
method. This is
<em>
not
</em>
the documentation for a language-specific driver, such as Node.js.
</p>
<p class="leafygreen-ui-1kp3ins">
For MongoDB API drivers, refer to the language-specific
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="https://www.mongodb.com/docs/drivers/" target="_self">
<span>
MongoDB driver documentation
<!-- -->
.
</span>
</a>
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Use the
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.limit" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
limit()
</code>
</span>
</a>
method on a cursor to specify the maximum
number of documents the cursor will return.
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.limit" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
limit()
</code>
</span>
</a>
is
analogous to the
<code class="leafygreen-ui-1l06pbn">
LIMIT
</code>
statement in a SQL database.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
You must apply
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.limit" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
limit()
</code>
</span>
</a>
to the cursor before
retrieving any documents from the database.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Use
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.limit" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
limit()
</code>
</span>
</a>
to maximize performance and prevent
MongoDB from returning more results than required for processing.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.limit" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
limit()
</code>
</span>
</a>
method has the following prototype form:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.collection.find(<query>).limit(<number>)","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-yzcs8i">
<pre class="leafygreen-ui-1q4bxgx" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">collection</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(<<!-- -->query<!-- -->><!-- -->).<span class="lg-highlight-title lg-highlight-function">limit</span>(<<!-- -->number<!-- -->><!-- -->)</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
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<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
</div>
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</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Supported Values
<a class="headerlink leafygreen-ui-1kepx47" href="#supported-values" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
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</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="supported-values">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
The behavior of
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.limit" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
limit()
</code>
</span>
</a>
is undefined for values less
than -2
<sup>
31
</sup>
and greater than 2
<sup>
31
</sup>
.
</p>
<p class="leafygreen-ui-1kp3ins">
You must specify a numeric value for
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.limit" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
limit()
</code>
.
</span>
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Zero Value
<a class="headerlink leafygreen-ui-1kepx47" href="#zero-value" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="zero-value">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
A
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.limit" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
limit()
</code>
</span>
</a>
value of 0 (i.e.
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.limit" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
.limit(0)
</code>
</span>
</a>
) is equivalent to setting no limit.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Negative Values
<a class="headerlink leafygreen-ui-1kepx47" href="#negative-values" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="negative-values">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
A negative limit is similar to a positive limit but closes the cursor
after returning a single
<a class="leafygreen-ui-tqgtui" href="/docs/manual/tutorial/iterate-a-cursor/#std-label-cursor-batches">
batch
</a>
of results. As
such, with a negative limit, if the limited result set does not fit
into a single batch, the number of documents received will be less than
the specified limit. By passing a negative limit, the client indicates
to the server that it will not ask for a subsequent batch via
<code class="leafygreen-ui-1l06pbn">
getMore
</code>
.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Using
<code class="leafygreen-ui-1l06pbn">
limit()
</code>
with
<code class="leafygreen-ui-1l06pbn">
sort()
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#using-limit---with-sort--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="using-limit---with-sort--">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
If using
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.limit" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
limit()
</code>
</span>
</a>
with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.sort/#mongodb-method-cursor.sort">
<code class="leafygreen-ui-1l06pbn">
sort()
</code>
</a>
, be
sure to include at least one field in your sort that contains
unique values, before passing results to
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.limit" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
limit()
</code>
.
</span>
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
Sorting on fields that contain duplicate values may return an
inconsistent sort order for those duplicate fields over multiple
executions, especially when the collection is actively receiving writes.
</p>
<p class="leafygreen-ui-1kp3ins">
The easiest way to guarantee sort consistency is to include the
<code class="leafygreen-ui-1l06pbn">
_id
</code>
field in your sort query.
</p>
<p class="leafygreen-ui-1kp3ins">
See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.sort/#std-label-sort-cursor-consistent-sorting">
Consistent sorting with the sort() method
</a>
for more information.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Using
<code class="leafygreen-ui-1l06pbn">
limit()
</code>
with
<code class="leafygreen-ui-1l06pbn">
skip()
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#using-limit---with-skip--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="using-limit---with-skip--">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
When you chain
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.skip/#mongodb-method-cursor.skip">
<code class="leafygreen-ui-1l06pbn">
skip()
</code>
</a>
and
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.limit" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
limit()
</code>
</span>
</a>
, the
method chaining order does not affect the results. The server always
applies the skip operation based on the sort order before it applies the
limit on how many documents to return.
</p>
<p class="leafygreen-ui-1kp3ins">
The following code example shows different chaining orders for
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/cursor.skip/#mongodb-method-cursor.skip">
<code class="leafygreen-ui-1l06pbn">
skip()
</code>
</a>
and
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-cursor.limit" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
limit()
</code>
</span>
</a>
that always produce
the same query results for the same data set:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"db.myColl.find().sort({_id: 1}).skip(3).limit(6);\n\ndb.myColl.find().sort({_id: 1}).limit(6).skip(3);","programmingLanguage":"JavaScript"}
</script>
<div class="css-1lju8ps">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1jheeh3">
<pre class="leafygreen-ui-1453az5" tabindex="-1"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">myColl</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->).<span class="lg-highlight-title lg-highlight-function">sort</span>(<!-- -->{<span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>}).<span class="lg-highlight-title lg-highlight-function">skip</span>(<span class="lg-highlight-number">3</span>).<span class="lg-highlight-title lg-highlight-function">limit</span>(<span class="lg-highlight-number">6</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx">db.<span class="lg-highlight-property">myColl</span>.<span class="lg-highlight-title lg-highlight-function">find</span>(<!-- -->).<span class="lg-highlight-title lg-highlight-function">sort</span>(<!-- -->{<span class="lg-highlight-attr">_id</span>: <span class="lg-highlight-number">1</span>}).<span class="lg-highlight-title lg-highlight-function">limit</span>(<span class="lg-highlight-number">6</span>).<span class="lg-highlight-title lg-highlight-function">skip</span>(<span class="lg-highlight-number">3</span>)<!-- -->;</td></tr></tbody></table></code></pre>
</div>
</div>
</div>
</section>
</section>
</section>
|
https://www.mongodb.com/docs/manual/reference/method/Session.startTransaction/ | <section>
<h1 class="contains-headerlink leafygreen-ui-41fr9s" weight="medium">
Session.startTransaction()
<a class="headerlink leafygreen-ui-1kepx47" href="#session.starttransaction--" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="session.starttransaction--">
</div>
</a>
</h1>
<div class="leafygreen-ui-a5yxub">
<p class="css-1cmx2d4 ef7gu8j0">
On this page
</p>
<ul class="css-1qb0mst ef7gu8j1">
<li class="leafygreen-ui-1e7a0ei">
<a class="lg-ui-0001 leafygreen-ui-e98ikf" href="#definition" target="_self">
<span>
Definition
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#behavior" target="_self">
<span>
Behavior
</span>
</a>
</li>
<li class="leafygreen-ui-1jqtqlb">
<a class="lg-ui-0001 leafygreen-ui-cpmeq5" href="#example" target="_self">
<span>
Example
</span>
</a>
</li>
</ul>
</div>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Definition
<a class="headerlink leafygreen-ui-1kepx47" href="#definition" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="definition">
</div>
</a>
</h2>
<dl class="method">
<dt>
<code class="leafygreen-ui-1l06pbn">
Session.startTransaction(<options>)
</code>
<a class="headerlink leafygreen-ui-1kepx47" href="#mongodb-method-Session.startTransaction" title="Permalink to this definition">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="mongodb-method-Session.startTransaction">
</div>
</a>
</dt>
<dd>
<p class="leafygreen-ui-1kp3ins">
Starts a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions">
multi-document transaction
</a>
associated with the session. At any given time, you can have at most
one open transaction for a session.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
This operation is a no-op. The transaction won't start on the
server until the first command is sent on the session. Therefore,
the snapshot time of the transaction won't be set until the first
command is sent on the session.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
Multi-document transactions are available for both sharded clusters and
replica sets.
</p>
<div class="leafygreen-ui-85da11" role="note">
<h2 class="leafygreen-ui-1ac4g5h">
Important
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
Within a transaction, you can only specify read and write (CRUD)
operations on
<strong>
existing
</strong>
collections. For example, a
multi-document transaction cannot include an insert operation
that would result in the creation of a new collection.
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
The
<a class="lg-ui-0001 leafygreen-ui-fgcsv5" href="#mongodb-method-Session.startTransaction" target="_self">
<span>
<code class="leafygreen-ui-1l06pbn">
Session.startTransaction()
</code>
</span>
</a>
method can take a document
with the following options:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ readConcern: { level: <level>}, writeConcern: { w: <value>, j: <boolean>, wtimeout: <number> } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-1q4bxgx" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-attr">readConcern</span>: <!-- -->{ <span class="lg-highlight-attr">level</span>: <<!-- -->level<!-- -->><!-- -->}<!-- -->, <span class="lg-highlight-attr">writeConcern</span>: <!-- -->{ <span class="lg-highlight-attr">w</span>: <<!-- -->value<!-- -->><!-- -->,<!-- --> <span class="lg-highlight-attr">j</span>: <<!-- -->boolean<!-- -->><!-- -->,<!-- --> <span class="lg-highlight-attr">wtimeout</span>: <<!-- -->number<!-- -->> <!-- -->} }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
</path>
</svg>
</div>
</button>
</div>
</div>
</div>
</div>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:30%"/>
<col style="width:70%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Option
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Description
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
readConcern
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
<em>
Optional.
</em>
A document that specifies the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern/#std-label-read-concern">
read concern
</a>
for all operations in the transaction,
overriding operation-specific read concern.
</p>
<p class="leafygreen-ui-1kp3ins">
You can specify one of the following read concern levels:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-snapshot/#mongodb-readconcern-readconcern.-snapshot-">
<code class="leafygreen-ui-1l06pbn">
"snapshot"
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-local/#mongodb-readconcern-readconcern.-local-">
<code class="leafygreen-ui-1l06pbn">
"local"
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-majority/#mongodb-readconcern-readconcern.-majority-">
<code class="leafygreen-ui-1l06pbn">
"majority"
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
For
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-local/#mongodb-readconcern-readconcern.-local-">
<code class="leafygreen-ui-1l06pbn">
"local"
</code>
</a>
and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-majority/#mongodb-readconcern-readconcern.-majority-">
<code class="leafygreen-ui-1l06pbn">
"majority"
</code>
</a>
read
concern, MongoDB may sometimes substitute a stronger read
concern.
</p>
</div>
</div>
</td>
</tr>
<tr class="">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<code class="leafygreen-ui-1l06pbn">
writeConcern
</code>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
<em>
Optional
</em>
. A document that specifies the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#std-label-write-concern">
write concern
</a>
for the transaction. This write concern
applies to the transaction commit and abort operations.
</p>
<p class="leafygreen-ui-1kp3ins">
The operations within the transaction use
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#mongodb-writeconcern-writeconcern.-number-">
<code class="leafygreen-ui-1l06pbn">
"w:
1"
</code>
</a>
, overriding operation-specific write concern.
</p>
<p class="leafygreen-ui-1kp3ins">
If you commit using
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/write-concern/#mongodb-writeconcern-writeconcern.-number-">
<code class="leafygreen-ui-1l06pbn">
"w: 1"
</code>
</a>
write
concern, your transaction can be rolled back during the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/replica-set-rollbacks/#std-label-replica-set-rollbacks">
failover process
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
For MongoDB Drivers, transactions use the client-level write
concern as the default.
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
</dd>
</dl>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Behavior
<a class="headerlink leafygreen-ui-1kepx47" href="#behavior" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="behavior">
</div>
</a>
</h2>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Operations Supported within a Transaction
<a class="headerlink leafygreen-ui-1kepx47" href="#operations-supported-within-a-transaction" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="operations-supported-within-a-transaction">
</div>
</a>
</h3>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
If running with
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/authorization/#std-label-authorization">
access control
</a>
, you
must have privileges for the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions-operations">
operations in the transaction
<!-- -->
.
</a>
</p>
</div>
</div>
<p class="leafygreen-ui-1kp3ins">
For
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions">
multi-document transactions
<!-- -->
:
</a>
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You can create collections and indexes in transactions. For
details, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions-create-collections-indexes">
Create Collections and Indexes in a Transaction
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
The collections used in a transaction can be in different
databases.
</p>
<div class="leafygreen-ui-15mdk4" role="note">
<h2 class="leafygreen-ui-6n7b7d">
Note
</h2>
<div class="leafygreen-ui-9mycqc">
<p class="leafygreen-ui-1kp3ins">
You cannot create new collections in cross-shard write transactions.
For example, if you write to an existing collection in one shard and
implicitly create a collection in a different shard, MongoDB cannot
perform both operations in the same transaction.
</p>
</div>
</div>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You cannot write to
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/capped-collections/#std-label-manual-capped-collection">
capped
</a>
collections.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You cannot use read concern
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-snapshot/#mongodb-readconcern-readconcern.-snapshot-">
<code class="leafygreen-ui-1l06pbn">
"snapshot"
</code>
</a>
when reading
from a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/capped-collections/#std-label-manual-capped-collection">
capped
</a>
collection.
(Starting in MongoDB 5.0)
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You cannot read/write to collections in the
<code class="leafygreen-ui-1l06pbn">
config
</code>
,
<code class="leafygreen-ui-1l06pbn">
admin
</code>
,
or
<code class="leafygreen-ui-1l06pbn">
local
</code>
databases.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You cannot write to
<code class="leafygreen-ui-1l06pbn">
system.*
</code>
collections.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You cannot return the supported operation's query plan using
<code class="leafygreen-ui-1l06pbn">
explain
</code>
or similar commands.
</p>
</li>
</ul>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
For cursors created outside of a transaction, you cannot call
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/getMore/#mongodb-dbcommand-dbcmd.getMore">
<code class="leafygreen-ui-1l06pbn">
getMore
</code>
</a>
inside the transaction.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
For cursors created in a transaction, you cannot call
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/getMore/#mongodb-dbcommand-dbcmd.getMore">
<code class="leafygreen-ui-1l06pbn">
getMore
</code>
</a>
outside the transaction.
</p>
</li>
</ul>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
You cannot specify the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/killCursors/#mongodb-dbcommand-dbcmd.killCursors">
<code class="leafygreen-ui-1l06pbn">
killCursors
</code>
</a>
command as
the first operation in a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions">
transaction
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
Additionally, if you run the
<code class="leafygreen-ui-1l06pbn">
killCursors
</code>
command within a
transaction, the server immediately stops the specified
cursors. It does
<strong>
not
</strong>
wait for the transaction to commit.
</p>
</li>
</ul>
<div class="leafygreen-ui-skkc39" tabindex="0">
<table class="leafygreen-ui-hr8lsv">
<colgroup>
<col style="width:50%"/>
<col style="width:20%"/>
<col style="width:30%"/>
</colgroup>
<thead class="leafygreen-ui-a9ho40">
<tr data-testid="leafygreen-ui-header-row">
<th class="leafygreen-ui-1trtg6r" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Method
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Command
</div>
</div>
</th>
<th class="leafygreen-ui-13uteka" role="columnheader" scope="col">
<div class="leafygreen-ui-ui0te9">
<div>
Note
</div>
</div>
</th>
</tr>
</thead>
<tbody>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.aggregate/#mongodb-method-db.collection.aggregate">
<code class="leafygreen-ui-1l06pbn">
db.collection.aggregate()
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/aggregate/#mongodb-dbcommand-dbcmd.aggregate">
<code class="leafygreen-ui-1l06pbn">
aggregate
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Excluding the following stages:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/collStats/#mongodb-pipeline-pipe.-collStats">
<code class="leafygreen-ui-1l06pbn">
$collStats
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/currentOp/#mongodb-pipeline-pipe.-currentOp">
<code class="leafygreen-ui-1l06pbn">
$currentOp
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/indexStats/#mongodb-pipeline-pipe.-indexStats">
<code class="leafygreen-ui-1l06pbn">
$indexStats
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/listLocalSessions/#mongodb-pipeline-pipe.-listLocalSessions">
<code class="leafygreen-ui-1l06pbn">
$listLocalSessions
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/listSessions/#mongodb-pipeline-pipe.-listSessions">
<code class="leafygreen-ui-1l06pbn">
$listSessions
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/merge/#mongodb-pipeline-pipe.-merge">
<code class="leafygreen-ui-1l06pbn">
$merge
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/out/#mongodb-pipeline-pipe.-out">
<code class="leafygreen-ui-1l06pbn">
$out
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/planCacheStats/#mongodb-pipeline-pipe.-planCacheStats">
<code class="leafygreen-ui-1l06pbn">
$planCacheStats
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/unionWith/#mongodb-pipeline-pipe.-unionWith">
<code class="leafygreen-ui-1l06pbn">
$unionWith
</code>
</a>
</p>
</li>
</ul>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.countDocuments/#mongodb-method-db.collection.countDocuments">
<code class="leafygreen-ui-1l06pbn">
db.collection.countDocuments()
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Excluding the following query operator expressions:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/where/#mongodb-query-op.-where">
<code class="leafygreen-ui-1l06pbn">
$where
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/near/#mongodb-query-op.-near">
<code class="leafygreen-ui-1l06pbn">
$near
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/query/nearSphere/#mongodb-query-op.-nearSphere">
<code class="leafygreen-ui-1l06pbn">
$nearSphere
</code>
</a>
</p>
</li>
</ul>
<p class="leafygreen-ui-1kp3ins">
The method uses the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/match/#mongodb-pipeline-pipe.-match">
<code class="leafygreen-ui-1l06pbn">
$match
</code>
</a>
aggregation stage for the
query and
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
aggregation stage with a
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/sum/#mongodb-group-grp.-sum">
<code class="leafygreen-ui-1l06pbn">
$sum
</code>
</a>
expression to perform the count.
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.distinct/#mongodb-method-db.collection.distinct">
<code class="leafygreen-ui-1l06pbn">
db.collection.distinct()
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/distinct/#mongodb-dbcommand-dbcmd.distinct">
<code class="leafygreen-ui-1l06pbn">
distinct
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
Available on unsharded collections.
</p>
<div class="line-block">
<div class="line">
For sharded collections, use the aggregation pipeline with the
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/operator/aggregation/group/#mongodb-pipeline-pipe.-group">
<code class="leafygreen-ui-1l06pbn">
$group
</code>
</a>
stage. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions-operations/#std-label-transactions-operations-distinct">
Distinct Operation
</a>
.
</div>
</div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.find/#mongodb-method-db.collection.find">
<code class="leafygreen-ui-1l06pbn">
db.collection.find()
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/find/#mongodb-dbcommand-dbcmd.find">
<code class="leafygreen-ui-1l06pbn">
find
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.deleteMany/#mongodb-method-db.collection.deleteMany">
<code class="leafygreen-ui-1l06pbn">
db.collection.deleteMany()
</code>
</a>
</div>
<div class="line">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.deleteOne/#mongodb-method-db.collection.deleteOne">
<code class="leafygreen-ui-1l06pbn">
db.collection.deleteOne()
</code>
</a>
</div>
<div class="line">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.remove/#mongodb-method-db.collection.remove">
<code class="leafygreen-ui-1l06pbn">
db.collection.remove()
</code>
</a>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/delete/#mongodb-dbcommand-dbcmd.delete">
<code class="leafygreen-ui-1l06pbn">
delete
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.findOneAndDelete/#mongodb-method-db.collection.findOneAndDelete">
<code class="leafygreen-ui-1l06pbn">
db.collection.findOneAndDelete()
</code>
</a>
</div>
<div class="line">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.findOneAndReplace/#mongodb-method-db.collection.findOneAndReplace">
<code class="leafygreen-ui-1l06pbn">
db.collection.findOneAndReplace()
</code>
</a>
</div>
<div class="line">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.findOneAndUpdate/#mongodb-method-db.collection.findOneAndUpdate">
<code class="leafygreen-ui-1l06pbn">
db.collection.findOneAndUpdate()
</code>
</a>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/findAndModify/#mongodb-dbcommand-dbcmd.findAndModify">
<code class="leafygreen-ui-1l06pbn">
findAndModify
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
If the update or replace operation is run with
<code class="leafygreen-ui-1l06pbn">
upsert: true
</code>
on a
non-existing collection, the collection is implicitly created.
</p>
<p class="leafygreen-ui-1kp3ins">
For more details, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions-operations/#std-label-transactions-operations-ddl">
Administration Operations
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.insertMany/#mongodb-method-db.collection.insertMany">
<code class="leafygreen-ui-1l06pbn">
db.collection.insertMany()
</code>
</a>
</div>
<div class="line">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.insertOne/#mongodb-method-db.collection.insertOne">
<code class="leafygreen-ui-1l06pbn">
db.collection.insertOne()
</code>
</a>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/insert/#mongodb-dbcommand-dbcmd.insert">
<code class="leafygreen-ui-1l06pbn">
insert
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
If run on a non-existing collection, the collection is implicitly
created.
</p>
<p class="leafygreen-ui-1kp3ins">
For more details, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions-operations/#std-label-transactions-operations-ddl">
Administration Operations
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.updateOne/#mongodb-method-db.collection.updateOne">
<code class="leafygreen-ui-1l06pbn">
db.collection.updateOne()
</code>
</a>
</div>
<div class="line">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.updateMany/#mongodb-method-db.collection.updateMany">
<code class="leafygreen-ui-1l06pbn">
db.collection.updateMany()
</code>
</a>
</div>
<div class="line">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.replaceOne/#mongodb-method-db.collection.replaceOne">
<code class="leafygreen-ui-1l06pbn">
db.collection.replaceOne()
</code>
</a>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/update/#mongodb-dbcommand-dbcmd.update">
<code class="leafygreen-ui-1l06pbn">
update
</code>
</a>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
If run on a non-existing collection, the collection is implicitly
created.
</p>
<p class="leafygreen-ui-1kp3ins">
For more details, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions-operations/#std-label-transactions-operations-ddl">
Administration Operations
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
<tr class="leafygreen-ui-15dvrnp">
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<div class="line-block">
<div class="line">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/db.collection.bulkWrite/#mongodb-method-db.collection.bulkWrite">
<code class="leafygreen-ui-1l06pbn">
db.collection.bulkWrite()
</code>
</a>
</div>
<div class="line">
Various
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/js-bulk/">
Bulk Operation Methods
</a>
</div>
</div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
</div>
</div>
</td>
<td class="leafygreen-ui-1drjk7h">
<div class="leafygreen-ui-1n4j8xf">
<div>
<p class="leafygreen-ui-1kp3ins">
If run on a non-existing collection, the collection is implicitly
created.
</p>
<p class="leafygreen-ui-1kp3ins">
For more details, see
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions-operations/#std-label-transactions-operations-ddl">
Administration Operations
<!-- -->
.
</a>
</p>
</div>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<p class="leafygreen-ui-1kp3ins">
Operations that affect the database catalog, such as creating or
dropping a collection or an index, are not allowed in multi-document
transactions. For example, a multi-document transaction cannot include
an insert operation that would result in the creation of a new
collection. See
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/transactions/#std-label-transactions-ops-restricted">
Restricted Operations
<!-- -->
.
</a>
</p>
<p class="leafygreen-ui-1kp3ins">
Informational commands, such as
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/hello/#mongodb-dbcommand-dbcmd.hello">
<code class="leafygreen-ui-1l06pbn">
hello
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/buildInfo/#mongodb-dbcommand-dbcmd.buildInfo">
<code class="leafygreen-ui-1l06pbn">
buildInfo
</code>
</a>
,
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/command/connectionStatus/#mongodb-dbcommand-dbcmd.connectionStatus">
<code class="leafygreen-ui-1l06pbn">
connectionStatus
</code>
</a>
(and their
helper methods) are allowed in transactions; however, they cannot be
the first operation in the transaction.
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Read Preference
<a class="headerlink leafygreen-ui-1kepx47" href="#read-preference" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="read-preference">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
Transactions support read preference
<a class="leafygreen-ui-tqgtui" href="/docs/manual/core/read-preference/#mongodb-readmode-primary">
<code class="leafygreen-ui-1l06pbn">
primary
</code>
.
</a>
</p>
</section>
<section>
<h3 class="contains-headerlink leafygreen-ui-15ajumo" weight="medium">
Atomicity
<a class="headerlink leafygreen-ui-1kepx47" href="#atomicity" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="atomicity">
</div>
</a>
</h3>
<p class="leafygreen-ui-1kp3ins">
While the transaction is open, no data changes made by operations in
the transaction is visible outside the transaction:
</p>
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
When a transaction commits, all data changes made in the transaction
are saved and visible outside the transaction. That is, a transaction
will not commit some of its changes while rolling back others.
</p>
<p class="leafygreen-ui-1kp3ins">
Until a transaction commits, the data changes made in the
transaction are not visible outside the transaction.
</p>
<p class="leafygreen-ui-1kp3ins">
However, when a transaction writes to multiple shards, not all
outside read operations need to wait for the result of the committed
transaction to be visible across the shards. For example, if a
transaction is committed and write 1 is visible on shard A but write
2 is not yet visible on shard B, an outside read at read concern
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/read-concern-local/#mongodb-readconcern-readconcern.-local-">
<code class="leafygreen-ui-1l06pbn">
"local"
</code>
</a>
can read the results of write 1 without
seeing write 2.
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
When a transaction aborts, all data changes made by the writes in the
transaction are discarded without ever becoming visible and the
transaction ends.
</p>
</li>
</ul>
</section>
</section>
<section>
<h2 class="contains-headerlink leafygreen-ui-19f71ei" weight="medium">
Example
<a class="headerlink leafygreen-ui-1kepx47" href="#example" title="Permalink to this heading">
<svg aria-label="Link Icon" class="leafygreen-ui-a30zj9" fill="none" height="12" role="img" viewbox="0 0 16 16" width="12" xmlns="http://www.w3.org/2000/svg">
<path d="M6.039 9.953a3.596 3.596 0 0 1-.327-.38l1.45-1.445a1.553 1.553 0 0 0 2.496.423l2.885-2.87a1.57 1.57 0 0 0 .01-2.213 1.553 1.553 0 0 0-2.203-.01l-.379.377A.995.995 0 0 1 8.56 3.83a1.005 1.005 0 0 1 .006-1.418l.38-.377a3.542 3.542 0 0 1 5.024.023 3.58 3.58 0 0 1-.022 5.047l-2.884 2.871a3.542 3.542 0 0 1-5.025-.022Z" fill="currentColor">
</path>
<path d="M9.961 6.047c.12.12.228.248.327.38l-1.45 1.445a1.553 1.553 0 0 0-2.496-.423l-2.885 2.87a1.57 1.57 0 0 0-.01 2.213 1.553 1.553 0 0 0 2.203.01l.379-.377a.995.995 0 0 1 1.411.006 1.005 1.005 0 0 1-.006 1.418l-.38.377a3.542 3.542 0 0 1-5.024-.023 3.58 3.58 0 0 1 .022-5.047l2.884-2.871a3.542 3.542 0 0 1 5.025.022Z" fill="currentColor">
</path>
</svg>
<div class="css-1btu0w3 evvkmar0" id="example">
</div>
</a>
</h2>
<p class="leafygreen-ui-1kp3ins">
Consider a scenario where as changes are made to an employee's record
in the
<code class="leafygreen-ui-1l06pbn">
hr
</code>
database, you want to ensure that the
<code class="leafygreen-ui-1l06pbn">
events
</code>
collection in the
<code class="leafygreen-ui-1l06pbn">
reporting
</code>
database are in sync with the
<code class="leafygreen-ui-1l06pbn">
hr
</code>
changes. That is, you want to ensure that these writes are done as a
single transaction, such that either both operations succeed or fail.
</p>
<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
employees
</code>
collection in the
<code class="leafygreen-ui-1l06pbn">
hr
</code>
database has the following
documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : ObjectId(\"5af0776263426f87dd69319a\"), \"employee\" : 3, \"name\" : { \"title\" : \"Mr.\", \"name\" : \"Iba Ochs\" }, \"status\" : \"Active\", \"department\" : \"ABC\" }\n{ \"_id\" : ObjectId(\"5af0776263426f87dd693198\"), \"employee\" : 1, \"name\" : { \"title\" : \"Miss\", \"name\" : \"Ann Thrope\" }, \"status\" : \"Active\", \"department\" : \"ABC\" }\n{ \"_id\" : ObjectId(\"5af0776263426f87dd693199\"), \"employee\" : 2, \"name\" : { \"title\" : \"Mrs.\", \"name\" : \"Eppie Delta\" }, \"status\" : \"Active\", \"department\" : \"XYZ\" }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"5af0776263426f87dd69319a"</span>)<!-- -->, <span class="lg-highlight-string">"employee"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"name"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"title"</span> <!-- -->: <span class="lg-highlight-string">"Mr."</span>, <span class="lg-highlight-string">"name"</span> <!-- -->: <span class="lg-highlight-string">"Iba Ochs"</span> }<!-- -->, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"Active"</span>, <span class="lg-highlight-string">"department"</span> <!-- -->: <span class="lg-highlight-string">"ABC"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"5af0776263426f87dd693198"</span>)<!-- -->, <span class="lg-highlight-string">"employee"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"name"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"title"</span> <!-- -->: <span class="lg-highlight-string">"Miss"</span>, <span class="lg-highlight-string">"name"</span> <!-- -->: <span class="lg-highlight-string">"Ann Thrope"</span> }<!-- -->, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"Active"</span>, <span class="lg-highlight-string">"department"</span> <!-- -->: <span class="lg-highlight-string">"ABC"</span> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"5af0776263426f87dd693199"</span>)<!-- -->, <span class="lg-highlight-string">"employee"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"name"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"title"</span> <!-- -->: <span class="lg-highlight-string">"Mrs."</span>, <span class="lg-highlight-string">"name"</span> <!-- -->: <span class="lg-highlight-string">"Eppie Delta"</span> }<!-- -->, <span class="lg-highlight-string">"status"</span> <!-- -->: <span class="lg-highlight-string">"Active"</span>, <span class="lg-highlight-string">"department"</span> <!-- -->: <span class="lg-highlight-string">"XYZ"</span> }</td></tr></tbody></table></code></pre>
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<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
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<p class="leafygreen-ui-1kp3ins">
The
<code class="leafygreen-ui-1l06pbn">
events
</code>
collection in the
<code class="leafygreen-ui-1l06pbn">
reporting
</code>
database has the
following documents:
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"{ \"_id\" : ObjectId(\"5af07daa051d92f02462644a\"), \"employee\" : 1, \"status\" : { \"new\" : \"Active\", \"old\" : null }, \"department\" : { \"new\" : \"ABC\", \"old\" : null } }\n{ \"_id\" : ObjectId(\"5af07daa051d92f02462644b\"), \"employee\" : 2, \"status\" : { \"new\" : \"Active\", \"old\" : null }, \"department\" : { \"new\" : \"XYZ\", \"old\" : null } }\n{ \"_id\" : ObjectId(\"5af07daa051d92f02462644c\"), \"employee\" : 3, \"status\" : { \"new\" : \"Active\", \"old\" : null }, \"department\" : { \"new\" : \"ABC\", \"old\" : null } }","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"5af07daa051d92f02462644a"</span>)<!-- -->, <span class="lg-highlight-string">"employee"</span> <!-- -->: <span class="lg-highlight-number">1</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"new"</span> <!-- -->: <span class="lg-highlight-string">"Active"</span>, <span class="lg-highlight-string">"old"</span> <!-- -->: <span class="lg-highlight-literal">null</span> }<!-- -->, <span class="lg-highlight-string">"department"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"new"</span> <!-- -->: <span class="lg-highlight-string">"ABC"</span>, <span class="lg-highlight-string">"old"</span> <!-- -->: <span class="lg-highlight-literal">null</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"5af07daa051d92f02462644b"</span>)<!-- -->, <span class="lg-highlight-string">"employee"</span> <!-- -->: <span class="lg-highlight-number">2</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"new"</span> <!-- -->: <span class="lg-highlight-string">"Active"</span>, <span class="lg-highlight-string">"old"</span> <!-- -->: <span class="lg-highlight-literal">null</span> }<!-- -->, <span class="lg-highlight-string">"department"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"new"</span> <!-- -->: <span class="lg-highlight-string">"XYZ"</span>, <span class="lg-highlight-string">"old"</span> <!-- -->: <span class="lg-highlight-literal">null</span> } }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">{ <span class="lg-highlight-string">"_id"</span> <!-- -->: <span class="lg-highlight-title lg-highlight-class">ObjectId</span>(<span class="lg-highlight-string">"5af07daa051d92f02462644c"</span>)<!-- -->, <span class="lg-highlight-string">"employee"</span> <!-- -->: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-string">"status"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"new"</span> <!-- -->: <span class="lg-highlight-string">"Active"</span>, <span class="lg-highlight-string">"old"</span> <!-- -->: <span class="lg-highlight-literal">null</span> }<!-- -->, <span class="lg-highlight-string">"department"</span> <!-- -->: <!-- -->{ <span class="lg-highlight-string">"new"</span> <!-- -->: <span class="lg-highlight-string">"ABC"</span>, <span class="lg-highlight-string">"old"</span> <!-- -->: <span class="lg-highlight-literal">null</span> } }</td></tr></tbody></table></code></pre>
<div class="leafygreen-ui-1bqcprk" data-testid="leafygreen-code-panel">
<button aria-disabled="false" aria-label="Copy" class="leafygreen-ui-1c6zwke" data-testid="code_copy-button" tabindex="0">
<div class="leafygreen-ui-xhlipt">
<svg aria-label="Copy Icon" class="leafygreen-ui-1st74h4" height="16" role="img" viewbox="0 0 16 16" width="16">
<path clip-rule="evenodd" d="M1 5.71428V10.2857C1 11.2325 1.76751 12 2.71429 12H5.75V7.10957C5.75 6.54414 5.97724 6.00244 6.38065 5.60623L8.67403 3.35381C8.77447 3.25516 8.88376 3.16757 9 3.09182V2.71429C9 1.76751 8.23249 1 7.28571 1H5.8V4.42857C5.8 5.13865 5.22437 5.71428 4.51429 5.71428H1ZM9 4.78571L7.25654 6.49804C7.24689 6.50752 7.23749 6.5172 7.22834 6.52708C7.22208 6.53383 7.21594 6.54068 7.20991 6.54762C7.07504 6.70295 7 6.90234 7 7.10957V7.79762H9H10.0095C10.4829 7.79762 10.8667 7.41386 10.8667 6.94047V4H10.1505C9.92587 4 9.7102 4.0882 9.54992 4.24562L9 4.78571ZM4.86667 1H4.15053C3.92587 1 3.7102 1.0882 3.54992 1.24562L1.25654 3.49804C1.09244 3.65921 1 3.87957 1 4.10957V4.79762H4.00952C4.48291 4.79762 4.86667 4.41386 4.86667 3.94047V1ZM7 12V8.71428H9H10.5143C11.2244 8.71428 11.8 8.13865 11.8 7.42857V4H13.2857C14.2325 4 15 4.76751 15 5.71429V13.2857C15 14.2325 14.2325 15 13.2857 15H8.71429C7.76751 15 7 14.2325 7 13.2857V12Z" fill="currentColor" fill-rule="evenodd">
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</div>
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</div>
<p class="leafygreen-ui-1kp3ins">
The following example opens a transaction, updates an employee's status
to
<code class="leafygreen-ui-1l06pbn">
Inactive
</code>
in the
<code class="leafygreen-ui-1l06pbn">
employees
</code>
status and inserts a corresponding
document to the
<code class="leafygreen-ui-1l06pbn">
events
</code>
collection, and commits the two operations
as a single transaction.
</p>
<script class="structured_data" type="application/ld+json">
{"@context":"https://schema.org","@type":"SoftwareSourceCode","codeSampleType":"code snippet","text":"// Runs the txnFunc and retries if TransientTransactionError encountered\n\nfunction runTransactionWithRetry(txnFunc, session) {\n while (true) {\n try {\n txnFunc(session); // performs transaction\n break;\n } catch (error) {\n // If transient error, retry the whole transaction\n if (error?.errorLabels?.includes(\"TransientTransactionError\") ) {\n print(\"TransientTransactionError, retrying transaction ...\");\n continue;\n } else {\n throw error;\n }\n }\n }\n}\n\n// Retries commit if UnknownTransactionCommitResult encountered\n\nfunction commitWithRetry(session) {\n while (true) {\n try {\n session.commitTransaction(); // Uses write concern set at transaction start.\n print(\"Transaction committed.\");\n break;\n } catch (error) {\n // Can retry commit\n if (error?.errorLabels?.includes(\"UnknownTransactionCommitResult\") ) {\n print(\"UnknownTransactionCommitResult, retrying commit operation ...\");\n continue;\n } else {\n print(\"Error during commit ...\");\n throw error;\n }\n }\n }\n}\n\n// Updates two collections in a transactions\n\nfunction updateEmployeeInfo(session) {\n employeesCollection = session.getDatabase(\"hr\").employees;\n eventsCollection = session.getDatabase(\"reporting\").events;\n\n session.startTransaction( { readConcern: { level: \"snapshot\" }, writeConcern: { w: \"majority\" } } );\n\n try{\n employeesCollection.updateOne( { employee: 3 }, { $set: { status: \"Inactive\" } } );\n eventsCollection.insertOne( { employee: 3, status: { new: \"Inactive\", old: \"Active\" } } );\n } catch (error) {\n print(\"Caught exception during transaction, aborting.\");\n session.abortTransaction();\n throw error;\n }\n\n commitWithRetry(session);\n}\n\n// Start a session.\nsession = db.getMongo().startSession( { readPreference: { mode: \"primary\" } } );\n\ntry{\n runTransactionWithRetry(updateEmployeeInfo, session);\n} catch (error) {\n // Do something with error\n} finally {\n session.endSession();\n}","programmingLanguage":"JavaScript"}
</script>
<div class="css-16lmvu9">
<div class="leafygreen-ui-196mwvg">
<div class="leafygreen-ui-1b1bvay">
<pre class="leafygreen-ui-11itue3" tabindex="0"><code class="lg-highlight-hljs-light javascript leafygreen-ui-9ybzas"><table class="leafygreen-ui-1tr4g10"><tbody><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// Runs the txnFunc</span><span class="lg-highlight-comment"> and retries if </span><span class="lg-highlight-comment">TransientTransactionError encountered</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword lg-highlight-function">function</span> <span class="lg-highlight-title lg-highlight-function">runTransactionWithRetry</span>(<span class="lg-highlight-params">txnFunc, session</span>)<!-- --> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">while</span> <!-- -->(<span class="lg-highlight-literal">true</span>) <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">try</span> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-function">txnFunc</span>(<!-- -->session)<!-- -->; <span class="lg-highlight-comment">// performs transaction</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">break</span>;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->} <span class="lg-highlight-keyword">catch</span> <!-- -->(<!-- -->error) <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-comment">// If transient error,</span><span class="lg-highlight-comment"> retry the whole </span><span class="lg-highlight-comment">transaction</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">if</span> <!-- -->(<!-- -->error<!-- -->?<!-- -->.<span class="lg-highlight-property">errorLabels</span>?<!-- -->.<span class="lg-highlight-title lg-highlight-function">includes</span>(<span class="lg-highlight-string">"TransientTransactionError"</span>) ) <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-function">print</span>(<span class="lg-highlight-string">"TransientTransactionError, retrying transaction ..."</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">continue</span>;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->} <span class="lg-highlight-keyword">else</span> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">throw</span> <!-- -->error<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">//</span><span class="lg-highlight-comment"> Retries commit if </span><span class="lg-highlight-comment">UnknownTransactionCommitResult encountered</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword lg-highlight-function">function</span> <span class="lg-highlight-title lg-highlight-function">commitWithRetry</span>(<span class="lg-highlight-params">session</span>)<!-- --> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">while</span> <!-- -->(<span class="lg-highlight-literal">true</span>) <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">try</span> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->session.<span class="lg-highlight-title lg-highlight-function">commitTransaction</span>(<!-- -->)<!-- -->; <span class="lg-highlight-comment">//</span><span class="lg-highlight-comment"> Uses write concern </span><span class="lg-highlight-comment">set at transaction start.</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-function">print</span>(<span class="lg-highlight-string">"Transaction committed."</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">break</span>;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->} <span class="lg-highlight-keyword">catch</span> <!-- -->(<!-- -->error) <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-comment">// Can retry commit</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">if</span> <!-- -->(<!-- -->error<!-- -->?<!-- -->.<span class="lg-highlight-property">errorLabels</span>?<!-- -->.<span class="lg-highlight-title lg-highlight-function">includes</span>(<span class="lg-highlight-string">"UnknownTransactionCommitResult"</span>) ) <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-function">print</span>(<span class="lg-highlight-string">"UnknownTransactionCommitResult, retrying commit operation ..."</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">continue</span>;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->} <span class="lg-highlight-keyword">else</span> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-function">print</span>(<span class="lg-highlight-string">"Error during commit ..."</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">throw</span> <!-- -->error<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> }</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">//</span><span class="lg-highlight-comment"> Updates two collections </span><span class="lg-highlight-comment">in a transactions</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword lg-highlight-function">function</span> <span class="lg-highlight-title lg-highlight-function">updateEmployeeInfo</span>(<span class="lg-highlight-params">session</span>)<!-- --> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->employeesCollection <!-- -->= <!-- -->session.<span class="lg-highlight-title lg-highlight-function">getDatabase</span>(<span class="lg-highlight-string">"hr"</span>).<span class="lg-highlight-property">employees</span>;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->eventsCollection <!-- -->= <!-- -->session.<span class="lg-highlight-title lg-highlight-function">getDatabase</span>(<span class="lg-highlight-string">"reporting"</span>).<span class="lg-highlight-property">events</span>;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->session.<span class="lg-highlight-title lg-highlight-function">startTransaction</span>( <!-- -->{ <span class="lg-highlight-attr">readConcern</span>: <!-- -->{ <span class="lg-highlight-attr">level</span>: <span class="lg-highlight-string">"snapshot"</span> }<!-- -->, <span class="lg-highlight-attr">writeConcern</span>: <!-- -->{ <span class="lg-highlight-attr">w</span>: <span class="lg-highlight-string">"majority"</span> } } )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">try</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->employeesCollection.<span class="lg-highlight-title lg-highlight-function">updateOne</span>( <!-- -->{ <span class="lg-highlight-attr">employee</span>: <span class="lg-highlight-number">3</span> }<!-- -->, <!-- -->{ <span class="lg-highlight-attr">$set</span>: <!-- -->{ <span class="lg-highlight-attr">status</span>: <span class="lg-highlight-string">"Inactive"</span> } } )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->eventsCollection.<span class="lg-highlight-title lg-highlight-function">insertOne</span>( <!-- -->{ <span class="lg-highlight-attr">employee</span>: <span class="lg-highlight-number">3</span>, <span class="lg-highlight-attr">status</span>: <!-- -->{ <span class="lg-highlight-attr">new</span>: <span class="lg-highlight-string">"Inactive"</span>, <span class="lg-highlight-attr">old</span>: <span class="lg-highlight-string">"Active"</span> } } )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->} <span class="lg-highlight-keyword">catch</span> <!-- -->(<!-- -->error) <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-function">print</span>(<span class="lg-highlight-string">"Caught exception during transaction, aborting."</span>)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->session.<span class="lg-highlight-title lg-highlight-function">abortTransaction</span>(<!-- -->)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-keyword">throw</span> <!-- -->error<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-function">commitWithRetry</span>(<!-- -->session)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-comment">// Start a session.</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">session <!-- -->= <!-- -->db.<span class="lg-highlight-title lg-highlight-function">getMongo</span>(<!-- -->).<span class="lg-highlight-title lg-highlight-function">startSession</span>( <!-- -->{ <span class="lg-highlight-attr">readPreference</span>: <!-- -->{ <span class="lg-highlight-attr">mode</span>: <span class="lg-highlight-string">"primary"</span> } } )<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx"><div class="leafygreen-ui-ihxujy"></div></td></tr><tr class=""><td class="leafygreen-ui-7razhx"><span class="lg-highlight-keyword">try</span>{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-title lg-highlight-function">runTransactionWithRetry</span>(<!-- -->updateEmployeeInfo<!-- -->, <!-- -->session)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">} <span class="lg-highlight-keyword">catch</span> <!-- -->(<!-- -->error) <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <span class="lg-highlight-comment">// Do something with error</span></td></tr><tr class=""><td class="leafygreen-ui-7razhx">} <span class="lg-highlight-keyword">finally</span> <!-- -->{</td></tr><tr class=""><td class="leafygreen-ui-7razhx"> <!-- -->session.<span class="lg-highlight-title lg-highlight-function">endSession</span>(<!-- -->)<!-- -->;</td></tr><tr class=""><td class="leafygreen-ui-7razhx">}</td></tr></tbody></table></code></pre>
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<div class="leafygreen-ui-13vw3ie" role="note">
<h2 class="leafygreen-ui-1fn4p2b">
Tip
</h2>
<h3 class="leafygreen-ui-144d5kf">
<strong>
See also:
</strong>
</h3>
<div class="leafygreen-ui-9mycqc">
<ul class="leafygreen-ui-rioki0">
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Session.abortTransaction/#mongodb-method-Session.abortTransaction">
<code class="leafygreen-ui-1l06pbn">
Session.abortTransaction()
</code>
</a>
</p>
</li>
<li class="leafygreen-ui-d7p7b6">
<p class="leafygreen-ui-1kp3ins">
<a class="leafygreen-ui-tqgtui" href="/docs/manual/reference/method/Session.commitTransaction/#mongodb-method-Session.commitTransaction">
<code class="leafygreen-ui-1l06pbn">
Session.commitTransaction()
</code>
</a>
</p>
</li>
</ul>
</div>
</div>
</section>
</section>
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