SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function toColumnTypeName (children 1)
     ExpressionList (children 1)
      Function toInt32 (children 1)
       ExpressionList (children 1)
        Function assumeNotNull (children 1)
         ExpressionList (children 1)
          Function materialize (children 1)
           ExpressionList (children 1)
            Literal NULL
