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Posted to issues@spark.apache.org by "Apache Spark (Jira)" <ji...@apache.org> on 2022/01/07 12:40:00 UTC

[jira] [Assigned] (SPARK-35442) Support propagate empty relation through aggregate

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

Apache Spark reassigned SPARK-35442:
------------------------------------

    Assignee: Apache Spark

> Support propagate empty relation 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
>            Assignee: Apache Spark
>            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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