gatorsmile commented on a change in pull request #25381: [SPARK-28531][SQL]
Improve Extract Python UDFs optimizer rule to enforce idempotence
URL: https://github.com/apache/spark/pull/25381#discussion_r311808324
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/SparkOptimizer.scala
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@@ -39,7 +39,8 @@ class SparkOptimizer(
ExtractPythonUDFFromAggregate,
// This must be executed after `ExtractPythonUDFFromAggregate` and
before `ExtractPythonUDFs`.
ExtractGroupingPythonUDFFromAggregate,
- ExtractPythonUDFs,
+ ExtractPythonUDFs) :+
+ Batch("Post Extract Python UDFs Optimization", FixedPoint(1),
Review comment:
Why `FixedPoint(1)` rather than `Once`?
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