sandeep-katta commented on a change in pull request #24766: [SPARK-27917][SQL]
canonical form of CaseWhen object is incorrect
URL: https://github.com/apache/spark/pull/24766#discussion_r289686231
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/trees/TreeNode.scala
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@@ -249,6 +251,7 @@ abstract class TreeNode[BaseType <: TreeNode[BaseType]]
extends Product {
// `mapValues` is lazy and we need to force it to materialize
m.mapValues(mapChild).view.force
case arg: TreeNode[_] if containsChild(arg) => mapTreeNode(arg)
+ case Some(child) => Some(mapChild(child))
Review comment:
yes
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