cloud-fan commented on code in PR #51847:
URL: https://github.com/apache/spark/pull/51847#discussion_r2315622497
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/InlineCTE.scala:
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@@ -189,14 +189,30 @@ case class InlineCTE(
case ref: CTERelationRef =>
val refInfo = cteMap(ref.cteId)
+ val cteBody = refInfo.cteDef.child match {
Review Comment:
We should clearly define the rule for propagating unlimited recursion from
CTE ref to `UnionLoop`. What if the rCTE is referenced more than once and one
have LIMIT ALL but others don't?
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