How to run workflow using PL/SQL

declare
  v_itemtype varchar2(30):='TPLE***E';          --Item Type Internal Nam
  v_process varchar2(30):='DEFAULT_PROCESS';   --Process Name
  v_itemkey varchar2(30);
begin
  select rcv_transactions_s.nextval into v_itemkey from dual; --Assign a item key

  wf_engine.createprocess(v_itemtype, v_itemkey,v_process);  --Creates a new runtime process for an application item.

  wf_engine.SetItemAttrText(v_itemtype ,v_itemkey,'EMPLOYEE','OPERATIONS');  --Input Parameter
  wf_engine.SetItemAttrText(v_itemtype ,v_itemkey,'MANAGER','CBROWN');     --Input Parameter
  wf_engine.SetItemAttrDate(v_itemtype ,v_itemkey,'START_DATE',sysdate);   --Input Parameter
  wf_engine.SetItemAttrDate(v_itemtype ,v_itemkey,'END_DATE',SYSDATE+1);   --Input Parameter

  wf_engine.StartProcess(v_itemtype, v_itemkey);    --Begins execution of the specified process.
  commit;
end;

select * from wf_items where item_type = 'TPLE***E' ;

select * from wf_item_activity_statuses where item_type = 'TPLE***E' and item_key= '4088307' ;

select * from wf_notifications where notification_id = 8972914;