Change 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 EXPLAINANALYZE 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 Changes
Fix issue that could cause incorrect results for large rows.
MongoDB Changes
Fix NullPointerException when a field contains a null.
Cassandra Changes
Add support for VARBINARY, TIMESTAMP and REAL data types.
Hive Changes
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.