Eugene Koifman created HIVE-15839:
-------------------------------------
Summary: Don't force cardinality check if only WHEN NOT MATCHED is
specified
Key: HIVE-15839
URL: https://issues.apache.org/jira/browse/HIVE-15839
Project: Hive
Issue Type: Sub-task
Affects Versions: 2.2.0
Reporter: Eugene Koifman
Assignee: Eugene Koifman
should've been part of HIVE-14949
if only WHEN NOT MATCHED is specified then the join is basically an anti-join
and we are not retrieving any values from target side. So the cardinality check
is just overhead (though presumably very minor since the filter above the join
will filter everything and thus there is nothing to group)
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
