Run the Workflow backend or PL/SQL Code

The below script to run 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 := 'TEXPO_W1';
   v_itemkey := '123';
   v_userkey := '123';
   v_process := 'TEX_PO_P';
   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;