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Posted to issues@spark.apache.org by "Allison Wang (Jira)" <ji...@apache.org> on 2021/07/13 04:31:00 UTC

[jira] [Created] (SPARK-36113) Unify the logic to handle COUNT bug for scalar and lateral subqueries

Allison Wang created SPARK-36113:
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             Summary: Unify the logic to handle COUNT bug for scalar and lateral subqueries
                 Key: SPARK-36113
                 URL: https://issues.apache.org/jira/browse/SPARK-36113
             Project: Spark
          Issue Type: Sub-task
          Components: SQL
    Affects Versions: 3.2.0
            Reporter: Allison Wang


Currently, for scalar subqueries, the logic to handle the count bug is in `RewriteCorrelatedScalarSubquery` (constructLeftJoins) while lateral subqueries rely on `DecorrelateInnerQuery` to handle the COUNT bug. 

We should unify them without introducing additional left outer joins for scalar subqueries.

 



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