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_r291002570
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/trees/TreeNode.scala
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@@ -234,6 +234,8 @@ abstract class TreeNode[BaseType <: TreeNode[BaseType]]
extends Product {
}
def mapChild(child: Any): Any = child match {
case arg: TreeNode[_] if containsChild(arg) => mapTreeNode(arg)
+ // CaseWhen Case or any tuple type
+ case tuple: (_, _) => (mapChild(tuple._1), mapChild(tuple._2))
Review comment:
I double checked , only the `tuple` and `Option` were missing.
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