这个触发器有时候不执行,问怎么回事
CREATE OR REPLACE TRIGGER "INSERTHMD"
after insert on t_wfcx_clxx for each row
declare
     v_new_cyzgzh t_wfcx_clxx.cyzgzh%type;
     v_new_wfcx_xm t_wfcx_clxx.jsyxm%type;
     v_new_wfcx_sfzh t_wfcx_clxx.jsysfzh%type;
     v_new_wfcx_clxxxh t_wfcx_clxx.clxxxh%type;
begin
      if :new.cyzgzh is not null then
        v_new_cyzgzh:=:new.cyzgzh;
        v_new_wfcx_xm :=:new.jsyxm;
        v_new_wfcx_sfzh :=:new.jsysfzh;
        v_new_wfcx_clxxxh :=:new.clxxxh;
         begin
             P_INSERTHMD(v_new_cyzgzh,v_new_wfcx_xm,v_new_wfcx_sfzh,v_new_wfcx_clxxxh);
           end;end if;
end;