Eugene Koifman created HIVE-14949: ------------------------------------- Summary: Enforce that target:source is not 1:N Key: HIVE-14949 URL: https://issues.apache.org/jira/browse/HIVE-14949 Project: Hive Issue Type: Sub-task Components: Transactions Reporter: Eugene Koifman Assignee: Eugene Koifman
If > 1 row on source side matches the same row on target side that means that we are forced update (or delete) the same row in target more than once as part of the same SQL statement. This should raise an error per SQL Spec There is no sure way to do this via static analysis of the query. Can we add something to ROJ operator to pay attention to ROW__ID of target side row and compare it with ROW__ID of target side of previous row output? If they are the same, that means > 1 source row matched. Or perhaps just mark each row in the hash table that it matched. And if it matches again, throw an error. -- This message was sent by Atlassian JIRA (v6.3.4#6332)