Xuefu Zhang created HIVE-9044:
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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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