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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2022/06/15 04:06:00 UTC

[jira] [Commented] (SPARK-39475) Pull out complex join keys for shuffled join

    [ https://issues.apache.org/jira/browse/SPARK-39475?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17554358#comment-17554358 ] 

Apache Spark commented on SPARK-39475:
--------------------------------------

User 'ulysses-you' has created a pull request for this issue:
https://github.com/apache/spark/pull/36874

> Pull out complex join keys for shuffled join
> --------------------------------------------
>
>                 Key: SPARK-39475
>                 URL: https://issues.apache.org/jira/browse/SPARK-39475
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.4.0
>            Reporter: XiDuo You
>            Priority: Major
>
> For a sort merge join, a complex join key may run three times at most:
>  # exchange
>  # sort
>  # join
> We can pull out it to project so we will execute it only once.



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