Work around race condition in import flow used by TestDistributedQueries
Add hash partitioning to distributed planer
Extract tupleInfos and sources in PlanFragment constructor
Move all exchange scheduling logic to SqlStageExecution
Manage output buffer set as single unit
Add hash partitioned aggregations
Shade guice in jdbc driver
Rename BytesHiveRecordCursor
Implement SHOW SCHEMAS FROM syntax

Allows you to show schemas from a specific catalog. Added a unit test
Add empty strings to Hive integration test