[jira] [Created] (SPARK-39216) Issue with correlated subquery and Union

["Allison Wang (Jira)" <ji...@apache.org>]

Allison Wang created SPARK-39216:
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             Summary: Issue with correlated subquery and Union
                 Key: SPARK-39216
                 URL: https://issues.apache.org/jira/browse/SPARK-39216
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 3.3.0
            Reporter: Allison Wang


 

SPARK-37915 added CollapseProject in rule CombineUnions, but it shouldn't collapse projects that contain correlated subqueries since haven't been de-correlated (PullupCorrelatedPredicates).

Here is a simple example to reproduce this issue
{code:java}
SELECT (SELECT IF(x, 1, 0)) AS a
FROM (SELECT true) t(x)
UNION 
SELECT 1 AS a {code}
Exception:

 

 
{code:java}
java.lang.IllegalStateException: Couldn't find x#4 in [] {code}
 



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