JoshRosen commented on code in PR #37668:
URL: https://github.com/apache/spark/pull/37668#discussion_r956244603
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sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/ObjectAggregationMap.scala:
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@@ -54,6 +54,7 @@ class ObjectAggregationMap() {
}
override def next(): AggregationBufferEntry = {
val entry = iter.next()
+ iter.remove()
Review Comment:
This memory usage optimization makes sense to me.
What do you think about renaming this `def iterator:
Iterator[AggregationBufferEntry]` to `destructiveIterator` to make it clearer
to the caller that this destructs the map? That would be consistent with
similar `destructiveIterator` methods elsewhere in the code, e.g.
https://github.com/apache/spark/blob/4f4a080a78c3979961e8483aace663bdc45f489d/sql/core/src/main/scala/org/apache/spark/sql/execution/aggregate/ObjectAggregationIterator.scala#L244-L248
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