【最佳實踐】Merge Into 批量新增並修改刪除數據

--2020.03.26：oracle沒有NOT MATCHED BY SOURCE 語法，但是可以在match的條件裏刪除，

MERGE INTO AIMS_ACCOUNT_ATTR T
USING (SELECT AA.ACCOUNTID                   ACCOUNTID,
              GCD42.V_45                     ACCOUNTNO,
              1                              IS_LAW_PERMEATION
       FROM GDT_CUST_GDTCLMS42 GCD42
                JOIN AIMS_ACCOUNT AA ON AA.ACCOUNTNO = GCD42.V_45) GDT
ON (GDT.ACCOUNTID = T.ACCOUNTID)
WHEN MATCHED THEN
    UPDATE SET T.IS_LAW_PERMEATION = GDT.IS_LAW_PERMEATION 
    DELETE WHERE GDT.ACCOUNTID = T.ACCOUNTID
WHEN NOT MATCHED THEN
    INSERT
        (ID, ACCOUNTID, ACCOUNTNO, IS_LAW_PERMEATION)
    VALUES (AIMS_ACCOUNT_ATTR_SEQ.NEXTVAL, GDT.ACCOUNTID, GDT.ACCOUNTNO, 1)

這種侷限性也比較大，可以考慮在using的表上處理

看一個案例：

我有一個賬戶表 aims_account ,融資信息子表 GDT_CUST_GDTCLMS42 ，賬戶信息子表

現在要把GDT_CUST_GDTCLMS42 裏面的帳號同步到賬戶子表aims_account_attr，

因爲aims_account_attr還有其他信息所以儘量不能刪除，如果GDT_CUST_GDTCLMS42裏面的賬戶被刪除了，就把aims_account_attr表的一個字段的值改爲0

MERGE INTO AIMS_ACCOUNT_ATTR T
USING (
    SELECT AAA.ACCOUNTID ACCOUNTID,AAA.ACCOUNTNO ACCOUNTNO,0 IS_LAW_PERMEATION FROM AIMS_ACCOUNT_ATTR AAA WHERE NOT EXISTS (SELECT 1 FROM GDT_CUST_GDTCLMS42 GDT42 WHERE GDT42.V_45 = AAA.ACCOUNTNO)
    UNION
    SELECT AA.ACCOUNTID ACCOUNTID, AA.ACCOUNTNO ACCOUNTNO, 1 IS_LAW_PERMEATION FROM GDT_CUST_GDTCLMS42 GDT42 JOIN AIMS_ACCOUNT AA ON AA.ACCOUNTNO = GDT42.V_45
) GDT
ON (GDT.ACCOUNTID = T.ACCOUNTID)
WHEN MATCHED THEN
    UPDATE
    SET T.IS_LAW_PERMEATION = GDT.IS_LAW_PERMEATION
WHEN NOT MATCHED THEN
    INSERT
    (ID, ACCOUNTID, ACCOUNTNO, IS_LAW_PERMEATION)
    VALUES
    (AIMS_ACCOUNT_ATTR_SEQ.NEXTVAL, GDT.ACCOUNTID, GDT.ACCOUNTNO, GDT.IS_LAW_PERMEATION)

使用環境IBATIS + ORACLE

頁面：

建表語句：

--序列
DECLARE
    CNT INTEGER;
BEGIN
    SELECT COUNT(0) INTO CNT FROM USER_SEQUENCES
    WHERE SEQUENCE_NAME = UPPER('SEQ_AIMS_FILE_CONTROL');
    IF CNT = 0 THEN
    EXECUTE IMMEDIATE 'CREATE SEQUENCE SEQ_AIMS_FILE_CONTROL
        MINVALUE 1
        MAXVALUE 9999999999999999999999999
        START WITH 1
        INCREMENT BY 1
        CACHE 20';
    END IF;
END;
/
--表
DECLARE
    CNT INTEGER;
BEGIN
    SELECT COUNT(0) INTO CNT FROM USER_ALL_TABLES
    WHERE TABLE_NAME = UPPER('AIMS_FILE_CONTROL');
    IF CNT = 0 THEN
    EXECUTE IMMEDIATE 'CREATE TABLE AIMS_FILE_CONTROL(
        CONTROL_ID NUMBER,
        ATTNO VARCHAR2(32),
        CREATE_PERSON VARCHAR2(32),
        CREATE_TIME DATE,
        UPDATE_PERSON VARCHAR2(32),
        UPDATE_TIME DATE,
        ACCOUNT_APPLY VARCHAR2(32),
        ACCOUNT_REGIST VARCHAR2(32),
        ACCOUNT_CHANGE_APPLY VARCHAR2(32),
        ACCOUNT_CHANGE_REGIST VARCHAR2(32),
        ACCOUNT_REVISE VARCHAR2(32),
        ACCOUNT_CANCEL_APPLY VARCHAR2(32),
        ACCOUNT_CANCEL_REGIST VARCHAR2(32),
        EBANK_APPLY VARCHAR2(32),
        EBANK_REGIST VARCHAR2(32),
        EBANK_CHANGE_APPLY VARCHAR2(32),
        EBANK_CHANGE_REGIST VARCHAR2(32),
        EBANK_REVISE VARCHAR2(32),
        EBANK_CANCEL_APPLY VARCHAR2(32),
        EBANK_CANCEL_REGIST VARCHAR2(32)
        )';
    END IF;
END;
/

COMMENT ON TABLE AIMS_FILE_CONTROL IS '集團賬戶附件控制'
/

COMMENT ON COLUMN AIMS_FILE_CONTROL.CONTROL_ID IS '主鍵'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.ATTNO IS '附件類型編號'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.CREATE_PERSON IS '創建者'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.CREATE_TIME IS '創建時間'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.UPDATE_PERSON IS '修改人'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.UPDATE_TIME IS '修改時間'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.ACCOUNT_APPLY IS '賬戶申請'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.ACCOUNT_REGIST IS '賬戶登記'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.ACCOUNT_CHANGE_APPLY IS '賬戶變更申請'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.ACCOUNT_CHANGE_REGIST IS '賬戶變更登記'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.ACCOUNT_REVISE IS '賬戶修正'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.ACCOUNT_CANCEL_APPLY IS '賬戶銷戶申請'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.ACCOUNT_CANCEL_REGIST IS '賬戶銷戶登記'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.EBANK_APPLY IS '網銀申請'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.EBANK_REGIST IS '網銀登記'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.EBANK_CHANGE_APPLY IS '網銀變更申請'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.EBANK_CHANGE_REGIST IS '網銀變更登記'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.EBANK_REVISE IS '網銀修正'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.EBANK_CANCEL_APPLY IS '網銀銷戶申請'
/
COMMENT ON COLUMN AIMS_FILE_CONTROL.EBANK_CANCEL_REGIST IS '網銀銷戶登記'
/

DECLARE
    CNT INTEGER;
BEGIN
    SELECT COUNT(0) INTO CNT FROM USER_CONSTRAINTS
    WHERE CONSTRAINT_NAME = UPPER('AIMS_FILE_CONTROL_PK');
    IF CNT = 0 THEN
    EXECUTE IMMEDIATE 'ALTER TABLE AIMS_FILE_CONTROL ADD CONSTRAINT AIMS_FILE_CONTROL_PK PRIMARY KEY(CONTROL_ID)';
    END IF;
END;
/

原來的寫法：新增和修改分開，並且不能執行批量操作：

新增：

    <!-- 新增集團賬戶附件控制 -->
    <insert id="saveFileControl" parameterClass="com.nstc.aims.model.FileControl">
        <selectKey resultClass="java.lang.Integer" keyProperty="controlId">
            SELECT SEQ_AIMS_FILE_CONTROL.NEXTVAL AS controlId FROM DUAL
        </selectKey>
        INSERT INTO AIMS_FILE_CONTROL (
            CONTROL_ID,
            ATTNO,
            CREATE_PERSON,
            CREATE_TIME,
            UPDATE_PERSON,
            UPDATE_TIME,
            ACCOUNT_APPLY,
            ACCOUNT_REGIST,
            ACCOUNT_CHANGE_APPLY,
            ACCOUNT_CHANGE_REGIST,
            ACCOUNT_REVISE,
            ACCOUNT_CANCEL_APPLY,
            ACCOUNT_CANCEL_REGIST,
            EBANK_APPLY,
            EBANK_REGIST,
            EBANK_CHANGE_APPLY,
            EBANK_CHANGE_REGIST,
            EBANK_REVISE,
            EBANK_CANCEL_APPLY,
            EBANK_CANCEL_REGIST
        ) VALUES(
            #controlId#,
            #attno#,
            #createPerson#,
            #createTime#,
            #updatePerson#,
            #updateTime#,
            #accountApply#,
            #accountRegist#,
            #accountChangeApply#,
            #accountChangeRegist#,
            #accountRevise#,
            #accountCancelApply#,
            #accountCancelRegist#,
            #ebankApply#,
            #ebankRegist#,
            #ebankChangeApply#,
            #ebankChangeRegist#,
            #ebankRevise#,
            #ebankCancelApply#,
            #ebankCancelRegist#
        )
    </insert>

修改：

    <!-- 修改集團賬戶附件控制 -->
    <update id="updateFileControl" parameterClass="com.nstc.aims.model.FileControl">
        UPDATE AIMS_FILE_CONTROL T SET
        T.CONTROL_ID = #controlId#
        <isNotNull prepend="," property="attno">
            T.ATTNO = #attno#
        </isNotNull>
        <isNotNull prepend="," property="createPerson">
            T.CREATE_PERSON = #createPerson#
        </isNotNull>
        <isNotNull prepend="," property="createTime">
            T.CREATE_TIME = #createTime#
        </isNotNull>
        <isNotNull prepend="," property="updatePerson">
            T.UPDATE_PERSON = #updatePerson#
        </isNotNull>
        <isNotNull prepend="," property="updateTime">
            T.UPDATE_TIME = #updateTime#
        </isNotNull>
        <isNotNull prepend="," property="accountApply">
            T.ACCOUNT_APPLY = #accountApply#
        </isNotNull>
        <isNotNull prepend="," property="accountRegist">
            T.ACCOUNT_REGIST = #accountRegist#
        </isNotNull>
        <isNotNull prepend="," property="accountChangeApply">
            T.ACCOUNT_CHANGE_APPLY = #accountChangeApply#
        </isNotNull>
        <isNotNull prepend="," property="accountChangeRegist">
            T.ACCOUNT_CHANGE_REGIST = #accountChangeRegist#
        </isNotNull>
        <isNotNull prepend="," property="accountRevise">
            T.ACCOUNT_REVISE = #accountRevise#
        </isNotNull>
        <isNotNull prepend="," property="accountCancelApply">
            T.ACCOUNT_CANCEL_APPLY = #accountCancelApply#
        </isNotNull>
        <isNotNull prepend="," property="accountCancelRegist">
            T.ACCOUNT_CANCEL_REGIST = #accountCancelRegist#
        </isNotNull>
        <isNotNull prepend="," property="ebankApply">
            T.EBANK_APPLY = #ebankApply#
        </isNotNull>
        <isNotNull prepend="," property="ebankRegist">
            T.EBANK_REGIST = #ebankRegist#
        </isNotNull>
        <isNotNull prepend="," property="ebankChangeApply">
            T.EBANK_CHANGE_APPLY = #ebankChangeApply#
        </isNotNull>
        <isNotNull prepend="," property="ebankChangeRegist">
            T.EBANK_CHANGE_REGIST = #ebankChangeRegist#
        </isNotNull>
        <isNotNull prepend="," property="ebankRevise">
            T.EBANK_REVISE = #ebankRevise#
        </isNotNull>
        <isNotNull prepend="," property="ebankCancelApply">
            T.EBANK_CANCEL_APPLY = #ebankCancelApply#
        </isNotNull>
        <isNotNull prepend="," property="ebankCancelRegist">
            T.EBANK_CANCEL_REGIST = #ebankCancelRegist#
        </isNotNull>
        WHERE CONTROL_ID = #controlId#
    </update>

如果修改或者新增的數據只有一條，那麼可以使用這種方式新增（using dual）

    <!--     設置融資附件上傳控制     -->
   	<insert id="saveFileUploadControl" parameterClass="java.util.HashMap">
   	    merge into GDT_FILE_CONTROL c
	    using dual
	    on (c.attno = #fileType#)
	    when matched then
	      update
	         set c.APPLY = #applyCheck#,
	         	 c.CONTRACT = #conCheck#,
	         	 c.CHANGE = #changeCheck#,
	         	 c.DRAW = #drawCheck#,
	         	 c.BOND = #bondCheck#,
	         	 c.REPAIR = #repairCheck#,
	         	 c.UPDATEONE = #updateOne#,
	         	 c.UPDATETIMA = sysdate
			     where c.attno = #fileType#
			when not matched then
			  insert (attno, APPLY, CONTRACT, CHANGE, DRAW, BOND, REPAIR, CREATOR, CREATTIMA, UPDATEONE, UPDATETIMA) 
			  values(#fileType#, #applyCheck#, #conCheck#, #changeCheck#, #drawCheck#, #bondCheck#, #repairCheck#, #creator#, sysdate, #updateOne#, sysdate)
   	</insert>

我改進的方法：批量新增或修改

    <!-- 保存或修改集團賬戶附件控制集合 -->  
    <update id="saveOrUpdateFileControlList" parameterClass="java.util.ArrayList">
        MERGE INTO AIMS_FILE_CONTROL T 
        USING
        <iterate open="(" close=") A" conjunction="UNION">  
            SELECT
            <!-- 主鍵爲空時候返回字符串，與原類型不匹配，非字符串類型都需要做轉換，這裏不要使用NVL -->
            DECODE(#list[].controlId#,NULL,NULL,#list[].controlId#) AS CONTROL_ID,
            #list[].attno# AS ATTNO,
            #list[].createPerson# AS CREATE_PERSON,
            NVL(#list[].createTime#,NULL) AS CREATE_TIME,
            #list[].updatePerson# AS UPDATE_PERSON,
            NVL(#list[].updateTime#,NULL) AS UPDATE_TIME,
            #list[].accountApply# AS ACCOUNT_APPLY,
            #list[].accountRegist# AS ACCOUNT_REGIST,
            #list[].accountChangeApply# AS ACCOUNT_CHANGE_APPLY,
            #list[].accountChangeRegist# AS ACCOUNT_CHANGE_REGIST,
            #list[].accountRevise# AS ACCOUNT_REVISE,
            #list[].accountCancelApply# AS ACCOUNT_CANCEL_APPLY,
            #list[].accountCancelRegist# AS ACCOUNT_CANCEL_REGIST,
            #list[].ebankApply# AS EBANK_APPLY,
            #list[].ebankRegist# AS EBANK_REGIST,
            #list[].ebankChangeApply# AS EBANK_CHANGE_APPLY,
            #list[].ebankChangeRegist# AS EBANK_CHANGE_REGIST,
            #list[].ebankRevise# AS EBANK_REVISE,
            #list[].ebankCancelApply# AS EBANK_CANCEL_APPLY,
            #list[].ebankCancelRegist# AS EBANK_CANCEL_REGIST
            FROM DUAL
        </iterate>
        ON (A.CONTROL_ID = T.CONTROL_ID)
        WHEN MATCHED THEN
            UPDATE SET
                T.ATTNO = A.ATTNO,
                T.UPDATE_PERSON = A.UPDATE_PERSON,
                T.UPDATE_TIME = SYSDATE,
                T.ACCOUNT_APPLY = A.ACCOUNT_APPLY,
                T.ACCOUNT_REGIST = A.ACCOUNT_REGIST,
                T.ACCOUNT_CHANGE_APPLY = A.ACCOUNT_CHANGE_APPLY,
                T.ACCOUNT_CHANGE_REGIST = A.ACCOUNT_CHANGE_REGIST,
                T.ACCOUNT_REVISE = A.ACCOUNT_REVISE,
                T.ACCOUNT_CANCEL_APPLY = A.ACCOUNT_CANCEL_APPLY,
                T.ACCOUNT_CANCEL_REGIST = A.ACCOUNT_CANCEL_REGIST,
                T.EBANK_APPLY = A.EBANK_APPLY,
                T.EBANK_REGIST = A.EBANK_REGIST,
                T.EBANK_CHANGE_APPLY = A.EBANK_CHANGE_APPLY,
                T.EBANK_CHANGE_REGIST = A.EBANK_CHANGE_REGIST,
                T.EBANK_REVISE = A.EBANK_REVISE,
                T.EBANK_CANCEL_APPLY = A.EBANK_CANCEL_APPLY,
                T.EBANK_CANCEL_REGIST = A.EBANK_CANCEL_REGIST
        WHEN NOT MATCHED THEN 
            INSERT (
            CONTROL_ID,
            ATTNO,
            CREATE_PERSON,
            CREATE_TIME,
            UPDATE_PERSON,
            UPDATE_TIME,
            ACCOUNT_APPLY,
            ACCOUNT_REGIST,
            ACCOUNT_CHANGE_APPLY,
            ACCOUNT_CHANGE_REGIST,
            ACCOUNT_REVISE,
            ACCOUNT_CANCEL_APPLY,
            ACCOUNT_CANCEL_REGIST,
            EBANK_APPLY,
            EBANK_REGIST,
            EBANK_CHANGE_APPLY,
            EBANK_CHANGE_REGIST,
            EBANK_REVISE,
            EBANK_CANCEL_APPLY,
            EBANK_CANCEL_REGIST
            ) VALUES (
            SEQ_AIMS_FILE_CONTROL.NEXTVAL,
            A.ATTNO,
            A.CREATE_PERSON,
            SYSDATE,
            A.UPDATE_PERSON,
            SYSDATE,
            A.ACCOUNT_APPLY,
            A.ACCOUNT_REGIST,
            A.ACCOUNT_CHANGE_APPLY,
            A.ACCOUNT_CHANGE_REGIST,
            A.ACCOUNT_REVISE,
            A.ACCOUNT_CANCEL_APPLY,
            A.ACCOUNT_CANCEL_REGIST,
            A.EBANK_APPLY,
            A.EBANK_REGIST,
            A.EBANK_CHANGE_APPLY,
            A.EBANK_CHANGE_REGIST,
            A.EBANK_REVISE,
            A.EBANK_CANCEL_APPLY,
            A.EBANK_CANCEL_REGIST
            )    
    </update>

需要注意：

1.用java獲得的list類型的對象，null被解析成‘’（空字符串），使用union的時候，如果字段類型不是字符串則可能會提示：ORA-01790: 表達式必須具有與對應表達式相同的數據類型。

2.主鍵是NUMBER類型，如果使用NVL（xxx，NULL），新增的時候會報錯ORA-01790: 表達式必須具有與對應表達式相同的數據類型。使用DECODE(XXX,NULL,NULL,XXX)就不會了，說明這兩個函數還是有區別的。

【最佳實踐】Merge Into 批量新增並修改刪除數據

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【最佳實踐】Merge Into 批量新增並修改刪除數據

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