dongjoon-hyun commented on a change in pull request #27562: 
[SPARK-30811][SQL][2.4] CTE should not cause stack overflow when it refers to 
non-existent table with same name
URL: https://github.com/apache/spark/pull/27562#discussion_r379032159
 
 

 ##########
 File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
 ##########
 @@ -215,8 +215,8 @@ class Analyzer(
     }
 
     def substituteCTE(plan: LogicalPlan, cteRelations: Seq[(String, 
LogicalPlan)]): LogicalPlan = {
-      plan resolveOperatorsDown {
-        case u: UnresolvedRelation =>
+      plan resolveOperatorsUp {
 
 Review comment:
   Although I know this change is correct, could you make a unit test for this 
change? Actually, for the current test case, line 219 covers it already.

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