Release 0.163

General

• Fix data corruption when transporting dictionary-encoded data.
• Fix potential deadlock when resource groups are configured with memory limits.
• Improve performance for OUTER JOIN queries.
• Improve exchange performance by reading from buffers in parallel.
• Improve performance when only a subset of the columns resulting from a JOIN are referenced.
• Make ALL, SOME and ANY non-reserved keywords.
• Add {func}from_big_endian_64 function.
• Change {func}xxhash64 return type from BIGINT to VARBINARY.
• Change subscript operator for map types to fail if the key is not present in the map. The former behavior (returning NULL) can be restored by setting the deprecated.legacy-map-subscript config option.
• Improve EXPLAIN ANALYZE to render stats more accurately and to include input statistics.
• Improve tolerance to communication errors for long running queries. This can be adjusted with the query.remote-task.max-error-duration config option.

Accumulo

• Fix issue that could cause incorrect results for large rows.

MongoDB

• Fix NullPointerException when a field contains a null.

Cassandra

• Add support for VARBINARY, TIMESTAMP and REAL data types.

Hive

• Fix issue that would prevent predicates from being pushed into Parquet reader.
• Fix Hive metastore user permissions caching when tables are dropped or renamed.
• Add experimental file based metastore which stores information in HDFS or S3 instead of a database.