Remove experimental intermediate aggregation optimizer. The optimizer.use-intermediate-aggregations
config option and task_intermediate_aggregation session property are no longer supported.
Add support for colocated joins for connectors that expose node-partitioned data.
Generalize the intra-node parallel execution system to work with all query stages.
The task.concurrency configuration property replaces the old task.join-concurrency
and task.default-concurrency options. Similarly, the task_concurrency session
property replaces the task_join_concurrency, task_hash_build_concurrency, and
task_aggregation_concurrency properties.
Hive Changes
Fix reading symlinks when the target is in a different HDFS instance.
Fix NoClassDefFoundError for SubnetUtils in HDFS client.
Fix error when reading from Hive tables with inconsistent bucketing metadata.
Correctly report read bytes when reading Parquet data.
Include path in unrecoverable S3 exception messages.
When replacing an existing Presto view, update the view data
in the Hive metastore rather than dropping and recreating it.
Rename table property clustered_by to bucketed_by.
Add support for varchar(n).
Kafka Changes
Fix errorcode6 when reading data from Kafka.
Add support for varchar(n).
Redis Changes
Add support for varchar(n).
MySQL and PostgreSQL Changes
Cleanup temporary data when a CREATETABLEAS fails.