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https://issues.apache.org/jira/browse/SPARK-33697?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Hyukjin Kwon reassigned SPARK-33697:
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Assignee: Allison Wang (was: Apache Spark)
> UnionExec should require column ordering in RemoveRedundantProjects
> -------------------------------------------------------------------
>
> Key: SPARK-33697
> URL: https://issues.apache.org/jira/browse/SPARK-33697
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.1.0
> Reporter: Allison Wang
> Assignee: Allison Wang
> Priority: Major
> Fix For: 3.1.0
>
>
> UnionExec requires its children's columns to have the same order in order to
> merge the columns. Currently, the physical rule `RemoveRedundantProjects` can
> pass through the ordering requirements from its parent and incorrectly remove
> the necessary project nodes below a union operation.
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