maropu commented on a change in pull request #23531: [SPARK-24497][SQL] Support 
recursive SQL query
URL: https://github.com/apache/spark/pull/23531#discussion_r307107508
 
 

 ##########
 File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
 ##########
 @@ -884,6 +885,10 @@ class Analyzer(
             if 
AttributeSet(windowExpressions.map(_.toAttribute)).intersect(conflictingAttributes)
               .nonEmpty =>
           (oldVersion, oldVersion.copy(windowExpressions = 
newAliases(windowExpressions)))
+
+        case oldVersion @ RecursiveReference(_, output, _)
+            if oldVersion.outputSet.intersect(conflictingAttributes).nonEmpty 
=>
+          (oldVersion, oldVersion.copy(output = output.map(_.newInstance())))
 
 Review comment:
   Can you add tests for this case?

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