我需要将数据从 db 存档到位于完全不同的服务器 (DB2) 的 db 中。我可以通过以下步骤做到这一点,但性能是问题所在。我有大量数据要存档。无论如何要通过优化的归档性能来做到这一点?
/* TEST WITH 1 TABLE */
--1. RETRIEVE IDs AND SAVE IN LIST - [USE LOOP TO PUSH RECORDS BASED ON IDs IN AN ARRAY]
SELECT ID FROM TABLE_1
WHERE CREATED_TIME >= '2013-08-07 10:06:22' AND CREATED_TIME <= '2013-08-07 11:09:43'
ORDER BY A.ID ASC
--2. DROP INDEXES [TOO SLOW!!!]
ALTER TABLE TABLE_1_ARC DROP PRIMARY KEY
--3. INSERT RECORDS INTO ARC TABLE [STORED PROCEDURE TO INSERT IN ALL TABLES???]
INSERT INTO TABLE_1_ARC
SELECT * FROM TABLE_1
WHERE CREATED_TIME >= '2013-08-07 10:06:22' AND CREATED_TIME <= '2013-08-07 11:09:43'
ORDER BY ID ASC
--LOOPING THROUGH ARRAY FROM STEP 1 WILL BE USED HERE INSTEAD OF WHERE
--4. DELETE ARCHIVED RECORDS FROM OPERATIONAL TABLE [STORED PROCEDURE TO DELETE EVERY FEW RECORDS???]
DELETE FROM TABLE_1
WHERE CREATED_TIME >= '2013-08-07 10:06:22' AND CREATED_TIME <= '2013-08-07 11:09:43'
--LOOPING THROUGH ARRAY FROM STEP 1 WILL BE USED HERE INSTEAD OF WHERE
--5. PUT INDEXES BACK [TOO SLOW!!!]
ALTER TABLE TABLE_1_ARC ADD PRIMARY KEY (ID)