cloud-fan commented on code in PR #50457:
URL: https://github.com/apache/spark/pull/50457#discussion_r2020843673
##########
sql/core/src/main/scala/org/apache/spark/sql/execution/stat/StatFunctions.scala:
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@@ -98,7 +98,8 @@ object StatFunctions extends Logging {
sum2: Array[QuantileSummaries]): Array[QuantileSummaries] = {
sum1.zip(sum2).map { case (s1, s2) => s1.compress().merge(s2.compress())
}
}
- val summaries = df.select(columns:
_*).rdd.treeAggregate(emptySummaries)(apply, merge)
+ val summaries = df.select(columns: _*).materializedRdd
+ .treeAggregate(emptySummaries)(apply, merge)
Review Comment:
not directly related but also a small followup: the internal RDD query
should not trigger a query execution event.
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