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Posted to issues@spark.apache.org by "XiDuo You (Jira)" <ji...@apache.org> on 2021/09/22 05:00:01 UTC

[jira] [Created] (SPARK-36823) Support broadcast nested loop join hint for equi-join

XiDuo You created SPARK-36823:
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             Summary: Support broadcast nested loop join hint for equi-join
                 Key: SPARK-36823
                 URL: https://issues.apache.org/jira/browse/SPARK-36823
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.3.0
            Reporter: XiDuo You


For the join if one side is small and other side is large, the shuffle overhead is also very big. Due to the limitation, we can only broadcast right side for left join and left side for right join. So for the other case, we can try to use `BroadcastNestedLoopJoin` as the join strategy.




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