Vineet Garg created HIVE-21007:
----------------------------------
Summary: Semi join + Union can lead to wrong plans
Key: HIVE-21007
URL: https://issues.apache.org/jira/browse/HIVE-21007
Project: Hive
Issue Type: Bug
Reporter: Vineet Garg
Assignee: Vineet Garg
Attachments: HIVE-21007.1.patch
Tez compiler has the ability to push JOIN within UNION (by replicating join on
each branch). If this JOIN had a SJ branch outgoing (or incoming) it could mess
up the plan and end up generating incorrect or wrong plan.
As a safe measure any SJ branch after UNION should be removed (until we improve
the logic to better handle SJ branches)
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
