cloud-fan commented on code in PR #47180:
URL: https://github.com/apache/spark/pull/47180#discussion_r1668293122


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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala:
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@@ -1796,6 +1796,9 @@ class Analyzer(override val catalogManager: 
CatalogManager) extends RuleExecutor
       case s: Sort if !s.resolved || s.missingInput.nonEmpty =>
         resolveReferencesInSort(s)
 
+      case u: UnresolvedWithCTERelations =>

Review Comment:
   Thinking about it more, now we need to special-case 
`UnresolvedWithCTERelations` twice: once in `ResolveReferences` to resolve 
session variables and once in `ResolveIdentifierClause` to resolve identifier 
and look up CTE relations.
   
   How about we make `UnresolvedWithCTERelations` an unary code, and only 
special case it once in `ResolveRelations` that we should look up from CTE 
relations for `UnresolvedRelations` inside`UnresolvedWithCTERelations`? Sorry 
for the back and forth!



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