maryannxue commented on a change in pull request #29593:
URL: https://github.com/apache/spark/pull/29593#discussion_r483147875
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/trees/TreeNode.scala
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@@ -91,7 +91,11 @@ abstract class TreeNode[BaseType <: TreeNode[BaseType]]
extends Product {
private val tags: mutable.Map[TreeNodeTag[_], Any] = mutable.Map.empty
protected def copyTagsFrom(other: BaseType): Unit = {
Review comment:
Agree with @cloud-fan 's reasoning and proposed fix.
The only worry is that we're not 100% sure if we are breaking things
somewhere else, but the tests don't say so yet. Can't think of an approach that
would have less impact yet fix this problem perfectly. Let's go with this
approach then.
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