yhuang-db commented on code in PR #51505:
URL: https://github.com/apache/spark/pull/51505#discussion_r2427269883
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/ApproxTopKAggregates.scala:
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@@ -177,6 +177,8 @@ object ApproxTopK {
val DEFAULT_K: Int = 5
val DEFAULT_MAX_ITEMS_TRACKED: Int = 10000
private val MAX_ITEMS_TRACKED_LIMIT: Int = 1000000
+ val VOID_MAX_ITEMS_TRACKED = -1
Review Comment:
Add comments.
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