Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/22104#discussion_r239722680 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/SparkOptimizer.scala --- @@ -31,7 +31,8 @@ class SparkOptimizer( override def defaultBatches: Seq[Batch] = (preOptimizationBatches ++ super.defaultBatches :+ Batch("Optimize Metadata Only Query", Once, OptimizeMetadataOnlyQuery(catalog)) :+ - Batch("Extract Python UDF from Aggregate", Once, ExtractPythonUDFFromAggregate) :+ + Batch("Extract Python UDFs", Once, + Seq(ExtractPythonUDFFromAggregate, ExtractPythonUDFs): _*) :+ --- End diff -- It looks weird to add this rule in our optimizer batch. We need at least some comments to explain the reason in the code.
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