Kris Mok created SPARK-26735:
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Summary: Verify plan integrity for special expressions
Key: SPARK-26735
URL: https://issues.apache.org/jira/browse/SPARK-26735
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 3.0.0
Reporter: Kris Mok
Add verification of plan integrity with regards to special expressions being
hosted only in supported operators. Specifically:
* AggregateExpression: should only be hosted in Aggregate, or indirectly in
Window
* WindowExpression: should only be hosted in Window
* Generator: should only be hosted in Generate
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