How to Launch Workflow from PL SQL

The below script will launch the desired workflow from PL/SQL code:

declare

   v_itemtype   VARCHAR2(50);

   v_itemkey    VARCHAR2(50);

   v_process    VARCHAR2(50);

   v_userkey    VARCHAR2(50);

begin

    v_itemtype := 'DEMOIT';

    v_itemkey := '1233';

    v_userkey := '1233';

    v_process := 'DEMOPROCESS';

    WF_ENGINE.Threshold := -1;

    WF_ENGINE.CREATEPROCESS(v_itemtype, v_itemkey, v_process);

    wf_engine.setitemuserkey(v_itemtype, v_itemkey, v_userkey );

    wf_engine.setitemowner (v_itemtype, v_itemkey,'SYSADMIN');

    WF_ENGINE.STARTPROCESS(v_itemtype, v_itemkey);

    commit;

exception when others

    then

      dbms_output.put_line(SQLERRM);

end;