docs: public LargeObject open(long oid, int mode, boolean commitOnClose) throws SQLException {
      if (conn.getAutoCommit()) {
        throw new PSQLException(GT.tr("Large Objects may not be used in auto-commit mode."),
            PSQLState.NO_ACTIVE_SQL_TRANSACTION);
      }
      return new LargeObject(fp, oid, mode, conn, commitOnClose);
    }