MERGE INTO 返回值 0

[DAO]

我想通过MERGE INTO 来判断 导入处理中 到底 update了多少条，insert了多少条
但是

MERGE INTO HOSPITAL_GUIDE T1
USING (SELECT '1212087742' AS hid,'肺结核3' AS gdisease FROM dual) T2
ON ( T1.H_ID=T2.hid and T1.G_DISEASE=T2.gdisease)
WHEN NOT MATCHED THEN 
insert (h_id,h_name,g_seq,g_dept,g_disease,g_symptom)
values ('1212087742','玉溪市人民医院',GUIDE_SEQ.NEXTVAL,'呼吸内科','肺结核','*********************')

其返回值 一直为0 ，该怎么处理？

[DAO]

默默的顶一下