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Posted to issues@spark.apache.org by "XiDuo You (Jira)" <ji...@apache.org> on 2021/05/19 09:50:00 UTC

[jira] [Created] (SPARK-35442) Eliminate unnecessary join through Aggregate

XiDuo You created SPARK-35442:
---------------------------------

             Summary: Eliminate unnecessary join through Aggregate
                 Key: SPARK-35442
                 URL: https://issues.apache.org/jira/browse/SPARK-35442
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.2.0
            Reporter: XiDuo You


If Aggregate and Join has the same output partitioning, the plan will look like

 
{code:java}
 SortMergeJoin
   Sort
     HashAggregate
       Shuffle
   Sort
     xxx{code}
 

To imporve the `EliminateUnnecessaryJoin`, we can support this case.

 



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