MySQL的功能：旋轉舊條目存檔表

Question

我要找的，將採取行年長則X天，並把它放在歸檔表... 正想着，使功能，因此這將是easer執行功能。 ..如果我管理由自己來寫吧:)

Answer 1

好吧，我定局寫的:) 我花了一段時間，但在這裏它是：

DELIMITER $$ 

DROP PROCEDURE IF EXISTS `procedure`.`rotate_events_pro`$$ 
CREATE DEFINER=`confiq`@`%` PROCEDURE `rotate_events_pro`(p_threshold_rotate_row int,p_days_to_keep int,OUT p_message VARCHAR(200)) 
BEGIN 
    DECLARE v_id_to_move INT; 
    #lets take ID that we need to move 
    #we can't use variables in LIMIT, how smart MySQL! 
    SET @v_sql = CONCAT('SELECT max(id) 
     INTO @v_id_to_move 
     FROM events 
     WHERE event_created < DATE_ADD(CURDATE(), INTERVAL - ',p_days_to_keep,' DAY) OR 
     id < (SELECT min(id) FROM (SELECT id FROM events ORDER BY id DESC LIMIT ?) as id)'); 
    PREPARE stmt1 FROM @v_sql; 
    SET @param1 = p_threshold_rotate_row; 
    EXECUTE stmt1 USING @param1; 
     DEALLOCATE PREPARE stmt1; 
    #we have IDs that need to to be moved to arhive 
    IF @v_id_to_move > 0 THEN 
     START TRANSACTION; 
      INSERT INTO archived_events SELECT * FROM events WHERE id < @v_id_to_move; 
      INSERT INTO archived_eventsinfo SELECT * FROM eventsinfo WHERE event_id < @v_id_to_move; 
      DELETE FROM events WHERE id < @v_id_to_move; 
      DELETE FROM eventsinfo WHERE event_id < @v_id_to_move; 
     COMMIT; 
     SET p_message = CONCAT('moved all events that id is < ',@v_id_to_move); 
    ELSE 
     SET p_message = 'Nothing to move'; 
    END IF; 
END$$ 

DELIMITER ; 

隨意反饋或編輯自己使用:)

Answer 2

使用觸發器代替像

CREATE TABLE archive_NUMBER_OF_WEEK (...); 
INSERT INTO archive_NUMBER_OF_WEEK SELECT * FROM content WHERE DATE < X days; 
DELETE * FROM content WHERE DATE < X days 

將發佈。他們是爲了這些。

Answer 3

如果你想用一個動態後綴命名存檔表（例如我認爲你在NUMBER_OF_WEEK的例子中是暗示的），那麼我會建議在bash/perl/python中編寫一個腳本來執行此操作，而不是使用一個MySQL存儲例程。

此外，如果你正在使用MySQL 5.1，你可能要考慮按日期分區的內容表，所以你可以很容易地刪除舊的分區，他們歸檔後。