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Posted to issues@spark.apache.org by "Karen Feng (Jira)" <ji...@apache.org> on 2021/03/31 19:15:00 UTC

[jira] [Created] (SPARK-34923) Metadata output should not always be propagated

Karen Feng created SPARK-34923:
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             Summary: Metadata output should not always be propagated
                 Key: SPARK-34923
                 URL: https://issues.apache.org/jira/browse/SPARK-34923
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: Karen Feng


Today, the vast majority of expressions uncritically propagate metadata output from their children. As a general rule, it seems reasonable that only expressions that propagate their children's output should also propagate their children's metadata output.



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