code: public long createLO(int mode) 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);
      }
      FastpathArg[] args = new FastpathArg[1];
      args[0] = new FastpathArg(mode);
      return fp.getOID("lo_creat", args);
    }
docs: This creates a large object, returning its OID.
  
  @param mode a bitmask describing different attributes of the new object
  @return oid of new object
  @throws SQLException on error