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  1. Spark
  2. SPARK-27314

Deduplicate exprIds for Union.

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    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.4.0
    • Fix Version/s: 3.0.0
    • Component/s: SQL
    • Labels:
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      Description

      We have been having a potential problem with Union when the children have the same expression id in their outputs, which happens when self-union.

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              • Assignee:
                ueshin Takuya Ueshin
                Reporter:
                ueshin Takuya Ueshin
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