Xuefu Zhang created HIVE-8412:
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Summary: Make reduce side join work for all join queries [Spark
Branch]
Key: HIVE-8412
URL: https://issues.apache.org/jira/browse/HIVE-8412
Project: Hive
Issue Type: Sub-task
Components: Spark
Reporter: Xuefu Zhang
Regardless all these join related optimizations such as map join, bucket join,
skewed join, etc, reduce side join is the fallback. That means, if a join query
wasn't taken care of by any of the optimization, it should work with reduce
side join (might in a less optimal fashion).
It's found that this isn't case at the moment. For instance,
auto_sortmerge_join_1.q failed to execute on Spark.
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