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Eugene Koifman commented on HIVE-15839: --------------------------------------- failures have age > 1 [~wzheng] could you review please > 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 > Components: Query Planning, Query Processor, Transactions > Affects Versions: 2.2.0 > Reporter: Eugene Koifman > Assignee: Eugene Koifman > Priority: Minor > Attachments: HIVE-15839.01.patch, HIVE-15839.02.patch, > HIVE-15839.03.patch > > > 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)