jiwen624 commented on code in PR #58234:
URL: https://github.com/apache/spark/pull/58234#discussion_r4075856417
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/aggregate/PivotFirst.scala:
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@@ -87,13 +87,25 @@ case class PivotFirst(
override val dataType: DataType = ArrayType(valueDataType)
- private val usesTreeMap: Boolean =
!TypeUtils.typeWithProperEquals(pivotColumn.dataType)
+ private val usesOrderingBasedIndex: Boolean = pivotColumn.dataType match {
+ case FloatType | DoubleType => true
Review Comment:
Good catch, thanks! Changed it in
[5657bf5](https://github.com/apache/spark/pull/58234/changes/b8476f30a7025a7ea25daf79e6059e0143121e26):
The `float/double` go back to the HashMap and use normalized bits as keys like
`CollectSet` does, so NaN and -0.0 still match and lookups stay O(1). The
TreeMap is now only used for types without proper equals.
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