Github user gengliangwang commented on a diff in the pull request:
https://github.com/apache/spark/pull/18429#discussion_r124432003
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala
---
@@ -40,6 +40,7 @@ abstract class Optimizer(sessionCatalog: SessionCatalog,
conf: SQLConf)
protected val fixedPoint = FixedPoint(conf.optimizerMaxIterations)
def batches: Seq[Batch] = {
+ Batch("Eliminate Distinct", Once, EliminateDistinct) ::
--- End diff --
RewriteDistinctAggregates is inside the "Finish Analysis" batch, so the new
rule has to be placed before it.
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