[MySQL] MySQL存储过程 事务transaction 数据表重建

直接上代码

-- 删除存储过程
DROP PROCEDURE IF EXISTS `renew_message_queue`;

-- 添加; 的转义
DELIMITER ;;

CREATE PROCEDURE `renew_message_queue`()
BEGIN

    -- 旧表备份的后缀
    DECLARE old_table_suffix VARCHAR(8) DEFAULT DATE_FORMAT(NOW(), '%Y%m%d');

    -- 事务标记
    DECLARE t_error INTEGER DEFAULT 0;    
    DECLARE CONTINUE HANDLER FOR SQLEXCEPTION SET @t_error=1;

    START TRANSACTION;
        -- 创建表
        CREATE TABLE `ecm_message_queue_new` LIKE `ecm_message_queue`;

        -- 备份旧表
        SET @back_table_sql = CONCAT('ALTER TABLE ecm_message_queue RENAME TO ecm_message_queue_bak_', old_table_suffix);
        -- 执行动态生成的sql语句
        PREPARE temp FROM @back_table_sql;
        EXECUTE temp;

        -- 重命名新表
        ALTER TABLE ecm_message_queue_new RENAME TO ecm_message_queue;

        -- 将未处理的数据迁移到新表
        SET @move_data_sql = CONCAT('INSERT INTO `ecm_message_queue` SELECT * FROM ecm_message_queue_bak_', old_table_suffix, ' WHERE send_status = 0');
        -- 执行动态生成的sql语句
        PREPARE temp FROM @move_data_sql;
        EXECUTE temp;

        IF t_error = 1 THEN    
                ROLLBACK;    
        ELSE    
                COMMIT;    
        END IF;

    -- 返回标识位的结果集，可不执行
    -- select t_error;

END;
;;
DELIMITER ;

CALL `renew_message_queue`();

 

 

Have fun with MySQL!