GideonPotok commented on code in PR #46404:
URL: https://github.com/apache/spark/pull/46404#discussion_r1594756311
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/Mode.scala:
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@@ -70,20 +78,46 @@ case class Mode(
buffer
}
- override def eval(buffer: OpenHashMap[AnyRef, Long]): Any = {
- if (buffer.isEmpty) {
+ override def eval(buff: OpenHashMap[AnyRef, Long]): Any = {
+ if (buff.isEmpty) {
return null
}
+ val buffer = if (child.dataType.isInstanceOf[StringType] &&
collationEnabled) {
+ val modeMap = buff.foldLeft(
+ new TreeMap[org.apache.spark.unsafe.types.UTF8String,
Long]()(Ordering.comparatorToOrdering(
+ CollationFactory.fetchCollation(collationId).comparator
Review Comment:
Actually, the Numerical benchmark case should be ignored for this analysis.
The case we can compare the various cases against is the UTF8_BINARY case.
Thus, For this implementation, the slowdown ranges from 16.9x to 56x. And for
the prototype, it ranges from 9.5x to 15x
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