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https://issues.apache.org/jira/browse/SPARK-44219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17757892#comment-17757892
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ASF GitHub Bot commented on SPARK-44219:
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User 'YannisSismanis' has created a pull request for this issue:
https://github.com/apache/spark/pull/41763
> Add extra per-rule validation for optimization rewrites.
> --------------------------------------------------------
>
> Key: SPARK-44219
> URL: https://issues.apache.org/jira/browse/SPARK-44219
> Project: Spark
> Issue Type: Improvement
> Components: Optimizer
> Affects Versions: 3.4.0, 3.4.1
> Reporter: Yannis Sismanis
> Priority: Major
>
> Adds per-rule validation checks for the following:
> 1. aggregate expressions in Aggregate plans are valid.
> 2. Grouping key types in Aggregate plans cannot by of type Map.
> 3. No dangling references have been generated.
> This is validation is by default enabled for all tests or selectively using
> the spark.sql.planChangeValidation=true flag.
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