>
              <a href="upgrade_11gr2_53_excl.html#idp811424">New Functions</a>
            </span>
          </dt>
        </dl>
      </div>
      <p>
        Database handles can now be configured to allow exclusive access to the
	database.  To enable exclusive access, call <a href="../api_reference/C/dbset_lk_exclusive.html" class="olink">DB-&gt;set_lk_exclusive()</a> before
	calling <a href="../api_reference/C/dbopen.html" class="olink">DB-&gt;open()</a>.  Set nowait_onoff to non-zero to have <a href=