SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Function initializeAggregation (children 1)
       ExpressionList (children 2)
        Literal \'uniqExactState\'
        Literal UInt64_0