Github user yhuai commented on a diff in the pull request:
https://github.com/apache/spark/pull/12040#discussion_r58118885
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/Window.scala ---
@@ -920,7 +931,7 @@ private[execution] object AggregateProcessor {
// Create the projections.
val initialProjection = newMutableProjection(
initialValues,
- Seq(SizeBasedWindowFunction.n))()
+ Seq(partitionSize))()
--- End diff --
The actual buffer will have more values, right? We always put partitionSize
at the first value? Or, if we do not have a sized based function, we will later
set the first value again?
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