Github user mgaido91 commented on a diff in the pull request: https://github.com/apache/spark/pull/20560#discussion_r180664561 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala --- @@ -274,3 +279,7 @@ abstract class BinaryNode extends LogicalPlan { override final def children: Seq[LogicalPlan] = Seq(left, right) } + +abstract class KeepOrderUnaryNode extends UnaryNode { --- End diff -- thanks for the suggestion. I'd love to hear also @cloud-fan's and @wzhfy's opinion on this in order to choose all together the best name for it. What do you think?
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