Li Jin created SPARK-23302:
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Summary: Refactor group aggregate pandas UDF to its own catalyst
rules
Key: SPARK-23302
URL: https://issues.apache.org/jira/browse/SPARK-23302
Project: Spark
Issue Type: Sub-task
Components: PySpark
Affects Versions: 2.4.0
Reporter: Li Jin
Per discussion on
[https://github.com/apache/spark/pull/19872#discussion_r165220142]
We should try to refactor group aggregate pandas UDF to its own catalyst rules
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