Question

我正在寻找一个功能，它会占用超过X天的行并将其放入存档表... 正在考虑制作功能，以便更容易执行...类似

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

如果我自己写的话会发帖：）

Answer 1

如果你想用一个动态后缀命名归档表（就像我认为你的示例中暗示了NUMBER_OF_WEEK），那么我建议在bash / perl / python中编写一个脚本来执行此操作，而不是使用MySQL存储例程。

此外，如果您使用的是MySQL 5.1，您可能需要考虑按日期对内容表进行分区，以便在归档后轻松删除旧分区。

Answer 2

使用触发器代替。它们就是为了这些。

Answer 3

好的，我终极写了:) 我花了一段时间，但现在是：

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 ;

随意反馈或编辑以供自己使用：）

MySQL功能：将旧条目旋转到归档表

3 个答案: