计数在使用条件的触发器中不起作用

Question

您好，请您建议我尝试检查count = 2 当条件满足（DA.matr_ID ='478'）或（DA.matr_ID ='40'）时 插入表中，但在（DA.matr_ID ='479'）这样的任何条件下，它都会插入错误的数据

CREATE OR REPLACE TRIGGER DEVICE_TMP_TR
  AFTER INSERT OR UPDATE ON DEVICE_ATTRIBUTES_TMP
  REFERENCING OLD AS old NEW AS new
  FOR EACH ROW
DECLARE
pragma autonomous_transaction;
V_COUNT NUMBER;
BEGIN
  SELECT COUNT(*) 
     INTO V_COUNT  
  FROM DEVICE_ATTRIBUTES_TMP DA 
  WHERE DA.DVS_ID = :new.DVS_ID 
   AND (DA.matr_ID = '40' or DA.matr_ID = '478');

  IF V_COUNT = 2 THEN
    INSERT Into APP_DELETED_TMP    
      (sdmid,appid,devis,des_nr,creation_date,creation_user,ant_id) 
    VALUES
      ('121213', '23', '45','63',SYSDATE,'hhdhSH',21);
    COMMIT;
  ELSE 
    RETURN;
  END IF;
END;