Yin Huai created HIVE-3668:
------------------------------
Summary: Merge MapReduce jobs which share input tables and the
same partitioning keys into a single MapReduce job
Key: HIVE-3668
URL: https://issues.apache.org/jira/browse/HIVE-3668
Project: Hive
Issue Type: Sub-task
Components: Query Processor
Reporter: Yin Huai
Assignee: Yin Huai
In the plan of a query, if there exists MapReduce jobs created for aggregation
operators or join operators which share one or more input tables and use the
same partitioning keys to shuffle the data, these jobs can be merged into a
single MapReduce job. Shared tables will be only scanned once.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
