SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Function position (children 1)
     ExpressionList (children 2)
      Literal \'1234\' (alias arg_2)
      Literal \'123\' (alias arg_1)
    Identifier arg_1
    Identifier arg_2
