Github user cloud-fan commented on a diff in the pull request:

    https://github.com/apache/spark/pull/20127#discussion_r159174832
  
    --- Diff: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
 ---
    @@ -95,6 +98,17 @@ class Analyzer(
         this(catalog, conf, conf.optimizerMaxIterations)
       }
     
    +  override def execute(plan: LogicalPlan): LogicalPlan = {
    +    AnalysisContext.reset()
    +    try {
    +      executeSameContext(plan)
    +    } finally {
    +      AnalysisContext.reset()
    +    }
    +  }
    +
    +  private def executeSameContext(plan: LogicalPlan): LogicalPlan = 
super.execute(plan)
    --- End diff --
    
    +1


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