wangyum commented on a change in pull request #31908:
URL: https://github.com/apache/spark/pull/31908#discussion_r598285144
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala
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@@ -659,6 +659,12 @@ case class Aggregate(
val nonAgg =
aggregateExpressions.filter(_.find(_.isInstanceOf[AggregateExpression]).isEmpty)
getAllValidConstraints(nonAgg)
}
+
+ // Whether this Aggregate operator is equally the Distinct operator.
+ private[sql] def isEquallyDistinct: Boolean = {
Review comment:
This method can be used elsewhere. For example:
https://github.com/apache/spark/blob/e226e2ceea7b648a1864c7ff1ba1e67eee83789b/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala#L1809-L1813
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