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Posted to issues@spark.apache.org by "XiDuo You (Jira)" <ji...@apache.org> on 2022/02/10 07:30:00 UTC

[jira] [Updated] (SPARK-38162) Optimize one max row plan in normal and AQE Optimizer

     [ https://issues.apache.org/jira/browse/SPARK-38162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

XiDuo You updated SPARK-38162:
------------------------------
    Summary: Optimize one max row plan in normal and AQE Optimizer  (was: Remove distinct in aggregate if its child is empty)

> Optimize one max row plan in normal and AQE Optimizer
> -----------------------------------------------------
>
>                 Key: SPARK-38162
>                 URL: https://issues.apache.org/jira/browse/SPARK-38162
>             Project: Spark
>          Issue Type: Improvement
>          Components: SQL
>    Affects Versions: 3.3.0
>            Reporter: XiDuo You
>            Priority: Major
>
> We can not propagate empty through aggregate if it does not contain grouping expression. But for the aggregate which contains distinct aggregate expression, we can remove distinct if its child is empty.



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