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https://issues.apache.org/jira/browse/SPARK-35442?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17471636#comment-17471636
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Apache Spark commented on SPARK-35442:
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User 'ulysses-you' has created a pull request for this issue:
https://github.com/apache/spark/pull/35148
> 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
> 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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