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Posted to issues@spark.apache.org by "XiDuo You (Jira)" <ji...@apache.org> on 2022/06/15 03:54:00 UTC

[jira] [Created] (SPARK-39475) Pull out complex join keys

XiDuo You created SPARK-39475:
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             Summary: Pull out complex join keys
                 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


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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