Release 0.79

Hive Changes

  • Add configuration option hive.force-local-scheduling and session property force_local_scheduling to force local scheduling of splits.

  • Add new experimental optimized RCFile reader. The reader can be enabled by setting the configuration option hive.optimized-reader.enabled or session property optimized_reader_enabled.

General Changes

  • Add support for UNNEST, which can be used as a replacement for the explode() function in Hive.

  • Fix a bug in the scan operator that can cause data to be missed. It currently only affects queries over information_schema or sys tables, metadata queries such as SHOW PARTITIONS and connectors that implement the ConnectorPageSource interface.