Release 400 (13 Oct 2022)

General

Add output buffer utilization to EXPLAIN ANALYZE VERBOSE. ({issue}14396)
Increase concurrency for large clusters. ({issue}14395)
Fix JSON serialization failure for QueryCompletedEvent in event listener. ({issue}14604)
Fix occasional maximum pending connection acquisitions exceeded failure when fault-tolerant execution is enabled. ({issue}14580)
Fix incorrect results when calling the round function on large real and double values. ({issue}14613)
Fix query failure when using the merge(qdigest) function. ({issue}14616)

Prevent coordinator out-of-memory failure when querying a large number of tables in a short period of time. ({issue}14571)

Reduce memory usage when scanning a large number of partitions, and add the hive.max-partitions-for-eager-load configuration property to manage the number of partitions that can be loaded into memory. ({issue}14225)
Increase the default value of the hive.max-partitions-per-scan configuration property to 1000000 from 100000. ({issue}14225)
Utilize the hive.metastore.thrift.delete-files-on-drop configuration property when dropping partitions and tables. Previously, it was only used when dropping tables. ({issue}13545)

Reduce query latency when querying tables with a large number of files. ({issue}14504)
Prevent table corruption when changing a table fails due to an inability to release the table lock from the Hive metastore. ({issue}14386)
Fix query failure when reading from a table with a leading double slash in the metadata location. ({issue}14299)

Add support for the Pinot proxy for controller/broker and server gRPC requests. ({issue}13015)
Update minimum required version to 0.10.0. ({issue}14090)

Add ConnectorAccessControl.checkCanGrantExecuteFunctionPrivilege overload which must be implemented to allow views that use table functions. ({issue}13944)