maropu commented on a change in pull request #28898:
URL: https://github.com/apache/spark/pull/28898#discussion_r446499643
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/NestedColumnAliasing.scala
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@@ -39,6 +39,22 @@ object NestedColumnAliasing {
NestedColumnAliasing.replaceToAliases(plan, nestedFieldToAlias,
attrToAliases)
}
+ /**
+ * This is to solve a `LogicalPlan` like `Project`->`Filter`->`Window`.
Review comment:
Is this only for `Window`? It seems not.
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