Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/21103#discussion_r205928822 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/collectionOperations.scala --- @@ -3651,14 +3651,9 @@ case class ArrayDistinct(child: Expression) } /** - * Will become common base class for [[ArrayUnion]], ArrayIntersect, and ArrayExcept. + * Will become common base class for [[ArrayUnion]], ArrayIntersect, and [[ArrayExcept]]. */ abstract class ArraySetLike extends BinaryArrayExpressionWithImplicitCast { --- End diff -- shall we extend `ComplexTypeMergingExpression` here?
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