Github user cloud-fan commented on a diff in the pull request: https://github.com/apache/spark/pull/17770#discussion_r114330723 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/basicLogicalOperators.scala --- @@ -906,3 +907,36 @@ case class Deduplicate( override def output: Seq[Attribute] = child.output } + +/** A logical plan for setting a barrier of analysis */ +case class AnalysisBarrier(child: LogicalPlan) extends UnaryNode { --- End diff -- A simple way is to make `AnalysisBarrier` a leaf node, so that we won't transform through the wrapped plan.
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