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From "Xuefu Zhang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-9044) Union input to a join operator poses problem when converting to map join [Spark Branch]
Date Mon, 08 Dec 2014 23:40:12 GMT
Xuefu Zhang created HIVE-9044:
---------------------------------

             Summary: Union input to a join operator poses problem when converting to map
join [Spark Branch]
                 Key: HIVE-9044
                 URL: https://issues.apache.org/jira/browse/HIVE-9044
             Project: Hive
          Issue Type: Sub-task
          Components: Spark
            Reporter: Xuefu Zhang


Followup for HIVE-8908. When a join operator has a union input on the big table side, we are
not able to convert it to map join. The problem seems to be a result of the way we handle
union in generating plan and the way we convert join to map join. We need to find the way
to handle this.



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