Github user nongli commented on a diff in the pull request:
https://github.com/apache/spark/pull/12345#discussion_r59649610
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/TungstenAggregate.scala
---
@@ -484,13 +497,42 @@ case class TungstenAggregate(
// so `copyResult` should be reset to `false`.
ctx.copyResult = false
+ def outputFromGeneratedMap: Option[String] = {
+ if (isAggregateHashMapEnabled) {
+ val row = ctx.freshName("aggregateHashMapRow")
--- End diff --
Comment at a high level what this is doing. Something like. " Iterate over
the aggregate rows and convert them from ColumnarBatch.Row to UnsafeRow"
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