peter-toth commented on code in PR #43614:
URL: https://github.com/apache/spark/pull/43614#discussion_r1381488547


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/InlineCTE.scala:
##########
@@ -120,6 +120,30 @@ case class InlineCTE(alwaysInline: Boolean = false) 
extends Rule[LogicalPlan] {
           }
         }
     }
+    // If a CTE ref count is 0, the other CTE that is referencing it should 
also have

Review Comment:
   I agree with @cloud-fan. Probably you just call `cleanCTEMap()` in 
`CheckAnalysis` too. 



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