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Posted to issues@spark.apache.org by "Allison Wang (Jira)" <ji...@apache.org> on 2020/12/08 00:54:00 UTC

[jira] [Created] (SPARK-33697) UnionExec should always require column ordering in RemoveRedundantProjects

Allison Wang created SPARK-33697:
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             Summary: UnionExec should always 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


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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