srowen commented on a change in pull request #24073: [SPARK-27134][SQL]
array_distinct function does not work correctly with columns containing array
of array
URL: https://github.com/apache/spark/pull/24073#discussion_r265281722
##########
File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala
##########
@@ -3112,29 +3112,30 @@ case class ArrayDistinct(child: Expression)
(data: Array[AnyRef]) => new
GenericArrayData(data.distinct.asInstanceOf[Array[Any]])
} else {
(data: Array[AnyRef]) => {
- var foundNullElement = false
- var pos = 0
+ val arrayBuffer = new scala.collection.mutable.ArrayBuffer[Any]
Review comment:
That's fine, you can pass an Array of anything to it then (right? or is
there some compile-time issue I'm not thinking of). It's not that it doesn't
work but this code locally could be more precise. No big deal.
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