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

["XiDuo You (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-35442?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

XiDuo You updated SPARK-35442:
------------------------------
    Description: 
The Aggregate in AQE is different with others, the `LogicalQueryStage` looks like `LogicalQueryStage(Aggregate, BaseAggregate)`. We should handle this case specially.


Logically, if the Aggregate grouping expression is not empty, we can eliminate it safely.


  was:
If Aggregate and Join have the same output partitioning, the plan will look like:
{code:java}
 SortMergeJoin
   Sort
     HashAggregate
       Shuffle
   Sort
     xxx{code}
 

Currently `EliminateUnnecessaryJoin` doesn't support optimize this case. Logically, if the Aggregate grouping expression is not empty, we can eliminate it safely.

 


> 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
>            Priority: Minor
>
> The Aggregate in AQE is different with others, the `LogicalQueryStage` looks like `LogicalQueryStage(Aggregate, BaseAggregate)`. We should handle this case specially.
> Logically, if the Aggregate grouping expression is not empty, we can eliminate it safely.



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