============= Release 0.178

General Changes

• Fix various memory accounting bugs, which reduces the likelihood of full GCs/OOMs.
• Fix a regression that causes queries that use the keyword "stats" to fail to parse.
• Fix an issue where a query does not get cleaned up on the coordinator after query failure.
• Add ability to cast to JSON from REAL, TINYINT or SMALLINT.
• Add support for GROUPING operation to :ref:complex grouping operations<complex_grouping_operations>.
• Add support for correlated subqueries in IN predicates.
• Add :func:!to_ieee754_32 and :func:!to_ieee754_64 functions.

Hive Changes

• Fix high CPU usage due to schema caching when reading Avro files.
• Preserve decompression error causes when decoding ORC files.

Memory Connector Changes

• Fix a bug that prevented creating empty tables.

SPI Changes

• Make environment available to resource group configuration managers.
• Add additional performance statistics to query completion event.