Add release notes for 0.217

presto-docs/src/main/sphinx/release.rst

@@ -5,6 +5,7 @@ Release Notes
 .. toctree::
     :maxdepth: 1
 
+    release/release-0.217
     release/release-0.216
     release/release-0.215
     release/release-0.214

presto-docs/src/main/sphinx/release/release-0.217.rst

@@ -0,0 +1,60 @@
+=============
+Release 0.217
+=============
+
+General Changes
+---------------
+
+* Fix poor query planning performance for queries submitted when the cluster does not have the minimum required number of workers available.
+* Fix a bug that caused a union of a table with a ``VALUES`` statement to execute on a single machine, which may result in out of memory errors.
+* Improve performance of some queries that use window functions by eliminating redundant shuffles.
+* Add grouped execution support for window functions.
+* Add support for the ``BOOLEAN`` type for ``EXPLAIN IO`` statements.
+* Add support for choosing distribution type for semi joins based on estimated cost when the session property ``join_distribution_type='AUTOMATIC'`` is set.
+* Add support for collecting table statistics on demand with the ``ANALYZE`` statement.
+* Add a config option (``query.stage-count-warning-threshold``) to specify a per-query threshold for the number of stages.
+  When this threshold is exceeded, a ``TOO_MANY_STAGES`` warning is raised.
+* Add per-task peak user memory usage to query statistics.
+* Add CLI support for showing the amount of data spilled during query execution.
+* Add :func:`ST_Points` function.
+* Add :doc:`/connector/elasticsearch`.
+* Remove the system memory pool and related configuration properties (``resources.reserved-system-memory``, ``deprecated.legacy-system-pool-enabled``) entirely.
+  System memory pool was deprecated in 0.201, and it was unused by default since that release. All memory allocations will now be served from the general/user memory pool.
+
+
+Web UI
+------
+
+* Improve live plan to show data transfer statistics as edge labels.
+* Improve live plan to contain more information about each node. For example, table scan nodes now show the name of the tables that are being scanned.
+* Add the ability to zoom when viewing plans for completed queries.
+* Add support for showing the amount of data spilled during query execution.
+
+
+Hive Connector Changes
+----------------------
+
+* Fix an issue where a partially successful rollback of a write could cause data loss and corrupt the metastore.
+  The ``hive.skip-target-cleanup-on-rollback`` configuration property can be used to skip deleting target directories when partition creation is rolled back.
+* Fix an issue where creating a table on S3 could fail for S3 prefixes without any associated objects (e.g., empty S3 directories).
+* Add support for ``ANALYZE`` statement in the Hive connector.
+  It's possible to specify a list of partitions to collect statistics for using the ``WITH`` properties of the ``ANALYZE`` statement.
+* Add configuration property ``hive.temporary-staging-directory-enabled`` and session property ``temporary_staging_directory_enabled``
+  to control whether a temporary staging directory should be used for write operations.
+* Add configuration property ``hive.temporary-staging-directory-path`` and session property ``temporary_staging_directory_path``
+  to control the location of temporary staging directory that is used for write operations.
+  The ``${USER}`` placeholder can be used to use a different location for each user (e.g., ``/tmp/${USER}``).
+
+
+JDBC Connector Changes
+----------------------
+
+* Add support for defining procedures.
+* Add support for providing table statistics.
+
+
+SPI Changes
+-----------
+
+* Add new SPIs for the ``ANALYZE`` statement. By default, running the ``ANALYZE`` statement for a connector that does not implement these SPIs results in
+  an error o``USER_ERROR`` with error code ``NOT_SUPPORTED``.