Docs - clarify that gptransfer source_user needs superuser privileges
source database system. The <codeph>gpfdists</codeph> protocol is not
supported.</li>
<li id="pk138472">Writable external tables on the source database system and
- readable external tables on the destination database system.</li>
+ readable external tables on the destination database system. Note that
+ <codeph>gptransfer</codeph> creates external tables with the
+ <codeph>execute</codeph> protocol, so the <codeph>--source_user</codeph>
+ account must have superuser privileges (the default is
+ <codeph>gpadmin</codeph>). </li>
<li id="pk138473">Named pipes that transfer the data between a writable external
table and a readable external table.</li>
</ul>
@@ -655,7 +659,11 @@ sdw4,192.0.2.4</codeblock>
<plentry>
<pt>--source-user=<varname>source_user</varname></pt>
<pd>User ID that is used to connect to the source Greenplum Database system. If
- not specified, the default is the user gpadmin.</pd>
+ not specified, the default is the user
+ gpadmin.<note><codeph>gptransfer</codeph> creates external tables
+ with the <codeph>execute</codeph> protocol, so the
+ <codeph>--source_user</codeph> that you specify must have superuser
+ privileges.</note></pd>
</plentry>
<plentry>
<pt>--sub-batch-size=<varname>sub_batch_size</varname></pt>
