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 \'anyState\'
        Function initializeAggregation (children 1)
         ExpressionList (children 2)
          Literal \'uniqState\'
          Literal UInt64_0
