Github user gatorsmile commented on a diff in the pull request: https://github.com/apache/spark/pull/16631#discussion_r97008849 --- Diff: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/LogicalPlan.scala --- @@ -344,7 +344,8 @@ abstract class UnaryNode extends LogicalPlan { sizeInBytes = 1 } - child.stats(conf).copy(sizeInBytes = sizeInBytes) + // Don't propagate rowCount and attributeStats, since they are not estimated here. --- End diff -- This sounds a general bug. We are having multiple `UnaryNode` are doing the same thing. Is my understanding right?
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