docs: @Override
    public ResultSet getUDTs(String catalog, String schemaPattern, String typeNamePattern,
        int[] types)
        throws SQLException {
      String sql =
          "SELECT ' ' TYPE_CAT, NULL TYPE_SCHEM, ' ' TYPE_NAME, ' ' CLASS_NAME, 0 DATA_TYPE, ' ' REMARKS, 0 BASE_TYPE"
              + " FROM DUAL WHERE 1=0";
  
      return executeQuery(sql);
    }