12.49. Release 0.197

General Changes

Fix query scheduling hang when the concurrent_lifespans_per_task session property is set.
Fix failure when a query contains a TIMESTAMP literal corresponding to a local time that does not occur in the default time zone of the Presto JVM. For example, if Presto was running in a CET zone (e.g., Europe/Brussels) and the client session was in UTC, an expression such as TIMESTAMP '2017-03-26 02:10:00' would cause a failure.
Extend predicate inference and pushdown for queries using a <symbol> IN <subquery> predicate.
Support predicate pushdown for the <column> IN <values list> predicate where values in the values list require casting to match the type of column.
Optimize min() and max() to avoid unnecessary object creation in order to reduce GC overhead.
Optimize the performance of ST_XMin(), ST_XMax(), ST_YMin(), and ST_YMax().
Add DATE variant for sequence() function.
Add ST_IsSimple() geospatial function.
Add support for broadcast spatial joins.

Change configuration check for weights in resource group policy to validate that either all of the subgroups or none of the subgroups have a scheduling weight configured.
Add support for named variables in source and user regular expressions that can be used to parameterize resource group names.
Add support for optional fields in DB resource group exact match selectors.

Fix reading of Hive partition statistics with unset fields. Previously, unset fields were incorrectly interpreted as having a value of zero.
Fix integer overflow when writing a single file greater than 2GB with optimized ORC writer.
Fix system memory accounting to include stripe statistics size and writer validation size for the optimized ORC writer.
Dynamically allocate the compression buffer for the optimized ORC writer to avoid unnecessary memory allocation. Add config property hive.orc.writer.max-compression-buffer-size to limit the maximum size of the buffer.
Add session property orc_optimized_writer_max_stripe_size to tune the maximum stipe size for the optimized ORC writer.
Add session property orc_string_statistics_limit to drop the string statistics when writing ORC files if they exceed the limit.
Use the view owner returned from the metastore at the time of the query rather than always using the user who created the view. This allows changing the owner of a view.

Include connector session properties for the connector metadata calls made when running SHOW statements or querying information_schema.
Add count and time of full GC that occurred while query was running to QueryCompletedEvent.
Change the ResourceGroupManager interface to include a match() method and remove the getSelectors() method and the ResourceGroupSelector interface.
Rename the existing SelectionContext class to be SelectionCriteria and create a new SelectionContext class that is returned from the match() method and contains the resource group ID and a manager-defined context field.
Use the view owner from ConnectorViewDefinition when present.