Github user mn-mikke commented on a diff in the pull request: https://github.com/apache/spark/pull/21352#discussion_r202961648 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala --- @@ -3226,7 +3218,7 @@ case class ArrayDistinct(child: Expression) override def dataType: DataType = child.dataType - @transient lazy val elementType: DataType = dataType.asInstanceOf[ArrayType].elementType + private def elementType: DataType = dataType.asInstanceOf[ArrayType].elementType --- End diff -- @mgaido91 Thanks for your point!
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