***********************
What's New in |version|
***********************

The following is notable functionality added in |version|

Connectors
----------
* Microsoft SQL Server Connector
* Cassandra Connector to support version 3.x

Security
--------
* Catalog Access Control
* Role management for Hive connector
* Secured internal cluster communication over HTTPS using Kerberos or LDAP authorization

SQL
---
* Grouping Support
* Improved Timestamp semantics

Performance
-----------
* Improved query execution performance for Window Functions
* Additional predicate push down for Cassandra Connector
* Numerous other performance improvements, bug fixes and other features


Release Notes
-------------
Also see release notes :doc:`/release/release-0.167-t`

***********************
What's New in |version|
***********************

The following is notable functionality added in |version|

Cost-Based Optimizer
--------------------
* Cost-based join reordering
* Determine join distribution type based on statistics
* Show estimated statistics in ``EXPLAIN``

Spill to Disk
--------------
* Spill-to-disk for inner joins
* Improved spill-to-disk for aggregations

Performance
-----------
* Distributed merge sort
* Improve performance for selective filters
* Numerous other performance improvements, bug fixes, and other features

Release Notes
-------------
Also see release notes :doc:`/release/release-0.179-t`

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