Improve visibility of blocked and reserved query states.
Lots of minor improvements.
JDBC Driver Changes
Allow escaping in DatabaseMetaData patterns.
Fix write operations for ViewFileSystem by using a relative location.
Remove support for the hive-cdh4 and hive-hadoop1 connectors which
support CDH 4 and Hadoop 1.x, respectively.
Remove the hive-cdh5 connector as an alias for hive-hadoop2.
Remove support for the legacy S3 block-based file system.
Add support for KMS-managed keys for S3 server-side encryption.
Add support for Cassandra 3.x by removing the deprecated Thrift interface used to
connect to Cassandra. The following config options are now defunct and must be removed:
cassandra.transport-factory-options and cassandra.partitioner.
Add methods to SystemAccessControl and ConnectorAccessControl to
filter the list of catalogs, schemas and tables.