Allison Wang created SPARK-40773:
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Summary: Refactor checkCorrelationsInSubquery
Key: SPARK-40773
URL: https://issues.apache.org/jira/browse/SPARK-40773
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 3.4.0
Reporter: Allison Wang
Currently, the logic in `checkCorrelationsInSubquery` is inefficient and
difficult to understand. It uses `foreachUp` to traverse the subquery plan
tree, and traverses down an entire subtree of a plan node to check whether it
contains any outer references. We can use recursion instead to traverse the
plan tree only once.
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