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https://issues.apache.org/jira/browse/SPARK-38162?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-38162.
---------------------------------
Fix Version/s: 3.3.0
Resolution: Fixed
Issue resolved by pull request 35473
[https://github.com/apache/spark/pull/35473]
> Optimize one 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
> Fix For: 3.3.0
>
>
> Optimize the plan if its max row is equal to or less than 1 in these cases:
> - if the child of sort max rows less than or equal to 1, remove the sort
> - if the child of local sort max rows per partition less than or equal to 1,
> remove the local sort
> - if the child of aggregate max rows less than or equal to 1 and it's
> grouping only (include the rewritten distinct plan), remove the aggregate
> - if the child of aggregate max rows less than or equal to 1, set distinct to
> false in all aggregate expression
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