SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function toString (children 1)
     ExpressionList (children 1)
      Function toNullable (children 1)
       ExpressionList (children 1)
        Function toIPv6 (children 1)
         ExpressionList (children 1)
          Literal \'::ffff:127.0.0.1\'
