GideonPotok commented on code in PR #46597:
URL: https://github.com/apache/spark/pull/46597#discussion_r1626623917
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Mode.scala:
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@@ -74,16 +90,25 @@ case class Mode(
if (buffer.isEmpty) {
return null
}
-
+ val collationAwareBuffer = child.dataType match {
+ case c: StringType if
+ !CollationFactory.fetchCollation(c.collationId).supportsBinaryEquality
=>
+ val collationId = c.collationId
+ val modeMap = buffer.toSeq.groupMapReduce {
Review Comment:
@dbatomic What you are proposing would make sense. The complexity is
increased. But i can whip up a draft PR and we can see whether it makes sense
to proceed.
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