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)