agubichev commented on code in PR #42383:
URL: https://github.com/apache/spark/pull/42383#discussion_r1300527734
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/DecorrelateInnerQuery.scala:
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@@ -654,6 +654,25 @@ object DecorrelateInnerQuery extends PredicateHelper {
val newProject = Project(newProjectList ++ referencesToAdd,
newChild)
(newProject, joinCond, outerReferenceMap)
+ case w@Window(projectList, partitionSpec, orderSpec, child) =>
+ val outerReferences = collectOuterReferences(w.expressions)
+ assert(outerReferences.isEmpty, s"Correlated column is not allowed
in window " +
+ s"function: $w")
+ val newOuterReferences = parentOuterReferences ++ outerReferences
+ val (newChild, joinCond, outerReferenceMap) =
+ decorrelate(child, newOuterReferences, aggregated = true,
underSetOp)
Review Comment:
we already have a test like that, see join-lateral.sql line 187:
https://github.com/apache/spark/pull/42383/files#diff-d8634e1fa795909252ff1b65501896fb5402befbad4ec9be86dfd840c5d3cfeaR187
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