maropu commented on a change in pull request #26420: [SPARK-27986][SQL] Support
ANSI SQL filter predicate for aggregate expression.
URL: https://github.com/apache/spark/pull/26420#discussion_r349865500
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
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@@ -157,38 +180,89 @@ abstract class AggregationIterator(
inputAttributes: Seq[Attribute]): (InternalRow, InternalRow) => Unit = {
val joinedRow = new JoinedRow
if (expressions.nonEmpty) {
- val mergeExpressions = functions.zip(expressions).flatMap {
- case (ae: DeclarativeAggregate, expression) =>
- expression.mode match {
+ val filterExpressions = expressions.map(_.filter)
+ var isFinalOrMerge = false
+ val mergeExpressions = functions.zipWithIndex.collect {
Review comment:
Why did you change `functions.zip(expressions).flatMap` to
`functions.zipWithIndex.collect`?
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