peter-toth commented on code in PR #52474:
URL: https://github.com/apache/spark/pull/52474#discussion_r2394134608
##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/AliasAwareOutputExpression.scala:
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@@ -128,6 +128,9 @@ trait AliasAwareQueryOutputOrdering[T <: QueryPlan[T]]
}
}
}
- newOrdering.takeWhile(_.isDefined).flatten.toSeq
+ newOrdering.takeWhile(_.isDefined).flatten.toSeq ++
outputExpressions.filter {
+ case Alias(child, _) => child.foldable
+ case expr => expr.foldable
+ }.map(SortOrder(_, Ascending).copy(isConstant = true))
Review Comment:
The problem seems to be that
[InMemoryRelation.withOutput()](https://github.com/apache/spark/blob/e04fd595370808bbf12b4c50980a86085fd20782/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryRelation.scala#L472-L473)
doesn't remap `outputOrdering`. And because `outputOrdering` is present in
`InMemoryRelation` as [case class
argument](https://github.com/apache/spark/blob/e04fd595370808bbf12b4c50980a86085fd20782/sql/core/src/main/scala/org/apache/spark/sql/execution/columnar/InMemoryRelation.scala#L431-L434)
the unmapped ordering attributes are considered missing inputs.
This seems to be another hidden issue with `InMemoryRelation.outputOrdering`.
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