mcdull_zhang created SPARK-37652:
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Summary: Support optimize skewed join through union
Key: SPARK-37652
URL: https://issues.apache.org/jira/browse/SPARK-37652
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 3.2.0
Reporter: mcdull_zhang
`OptimizeSkewedJoin` rule will take effect only when the plan has two
ShuffleQueryStageExec。
With `Union`, it might break the assumption. For example, the following plans
{panel:title=scenes1:}
Union
SMJ
SMJ
{panel}
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