maropu commented on a change in pull request #26656: [SPARK-27986][SQL] Support
ANSI SQL filter clause for aggregate expression.
URL: https://github.com/apache/spark/pull/26656#discussion_r350145023
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File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/AggregationIterator.scala
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@@ -121,7 +121,7 @@ abstract class AggregationIterator(
// func2 and func3 are imperative aggregate functions.
// ImperativeAggregateFunctionPositions will be [1, 2].
protected[this] val allImperativeAggregateFunctionPositions: Array[Int] = {
- val positions = new ArrayBuffer[Int]()
+ val positions = new mutable.ArrayBuffer[Int]()
Review comment:
Not used?
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