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https://issues.apache.org/jira/browse/SPARK-32806?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17191410#comment-17191410
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Apache Spark commented on SPARK-32806:
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User 'imback82' has created a pull request for this issue:
https://github.com/apache/spark/pull/29655
> SortMergeJoin with partial hash distribution can be optimized to remove
> shuffle
> -------------------------------------------------------------------------------
>
> Key: SPARK-32806
> URL: https://issues.apache.org/jira/browse/SPARK-32806
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: Terry Kim
> Priority: Minor
>
> SortMergeJoin with partial hash distribution can be optimized to remove
> shuffle if the hash partitioning expressions are a subset of join keys for
> both sides.
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