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Posted to issues@spark.apache.org by "XiDuo You (Jira)" <ji...@apache.org> on 2022/02/09 10:19:00 UTC

[jira] [Created] (SPARK-38162) Remove distinct in aggregate if its child is empty

XiDuo You created SPARK-38162:
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             Summary: Remove distinct in aggregate if its child is empty
                 Key: SPARK-38162
                 URL: https://issues.apache.org/jira/browse/SPARK-38162
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 3.3.0
            Reporter: XiDuo You


We can not propagate empty through aggregate if it does not contain grouping expression. But for the aggregate which contains distinct aggregate expression, we can remove distinct if its child is empty.



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