return null;
  public static LongValue pg_field_type_oid(Env env,                                            @NotNull PostgresResult result,                                            int fieldNumber)  {    try {      ResultSetMetaData metaData = result.getMetaData();      String columnTypeName = metaData.getColumnTypeName(fieldNumber + 1);      String metaQuery = ("SELECT oid FROM pg_type WHERE typname='"+columnTypeName+"'");      result = pg_query(env, (Postgres) result.getConnection(), metaQuery);      String s = pg_fetch_result(env,                                 result,                                 LongValue.create(-1),                                 LongValue.create(0));      return LongValue.create(new Integer(s));    } catch (Exception ex) {      log.log(Level.FINE, ex.toString(), ex);      return null;    }  }