cloud-fan commented on a change in pull request #27428:
URL: https://github.com/apache/spark/pull/27428#discussion_r449072337
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/interfaces.scala
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@@ -216,15 +216,21 @@ abstract class AggregateFunction extends Expression {
def toAggregateExpression(): AggregateExpression =
toAggregateExpression(isDistinct = false)
/**
- * Wraps this [[AggregateFunction]] in an [[AggregateExpression]] and sets
`isDistinct`
- * flag of the [[AggregateExpression]] to the given value because
+ * Wraps this [[AggregateFunction]] in an [[AggregateExpression]] with
`isDistinct`
+ * flag and `filter` option of the [[AggregateExpression]] to the given
value because
Review comment:
`filter option` looks weird, how about `and an optional 'filter'`?
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