Github user maropu commented on a diff in the pull request:
https://github.com/apache/spark/pull/17191#discussion_r112605454
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
---
@@ -136,6 +136,7 @@ class Analyzer(
ResolveGroupingAnalytics ::
ResolvePivot ::
ResolveOrdinalInOrderByAndGroupBy ::
+ ResolveAggAliasInGroupBy ::
--- End diff --
One idea to put this rule outside `resolution` batch is to uncheck grouping
expression resolution in
[Aggregate.resloved](https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala#L558).
But, I feel this is a bit unsafe.
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