ALTER TABLE tb_3a_huandan_detail PARTITION BY RANGE (TO_DAYS(ServiceStartTime))
(
    PARTITION p20160523 VALUES LESS THAN (TO_DAYS('2016-05-23')),
    PARTITION p20160524 VALUES LESS THAN (TO_DAYS('2016-05-24')),
    PARTITION p20160525 VALUES LESS THAN (TO_DAYS('2016-05-25')),
    PARTITION p20160526 VALUES LESS THAN (TO_DAYS('2016-05-26')),
    PARTITION p20160527 VALUES LESS THAN (TO_DAYS('2016-05-27'))
)

DELIMITER $$

USE `nres`$$

DROP PROCEDURE IF EXISTS `create_Partition_3Ahuadan`$$

CREATE DEFINER=`nres`@`%` PROCEDURE `create_Partition_3Ahuadan`()
BEGIN
/* 事務回滾，其實放這里沒什么作用，ALTER TABLE是隱式提交，回滾不了的。*/
? ? DECLARE EXIT HANDLER FOR SQLEXCEPTION ROLLBACK;
? ? START TRANSACTION;

/* 到系統(tǒng)表查出這個表的最大分區(qū)，得到最大分區(qū)的日期。在創(chuàng)建分區(qū)的時候，名稱就以日期格式存放，方便后面維護 */
? ? SELECT REPLACE(partition_name,'p','') INTO @P12_Name FROM INFORMATION_SCHEMA.PARTITIONS
? ? WHERE table_name='tb_3a_huandan_detail' ORDER BY partition_ordinal_position DESC LIMIT 1;
? ? ?SET @Max_date= DATE(DATE_ADD(@P12_Name+0, INTERVAL 1 DAY))+0;
/* 修改表，在最大分區(qū)的后面增加一個分區(qū)，時間范圍加1天 */
? ? SET @s1=CONCAT('ALTER TABLE tb_3a_huandan_detail ADD PARTITION (PARTITION p',@Max_date,' VALUES LESS THAN (TO_DAYS (''',DATE(@Max_date),''')))');
? ? /* 輸出查看增加分區(qū)語句*/
? ? SELECT @s1;
? ? PREPARE stmt2 FROM @s1;
? ? EXECUTE stmt2;
? ? DEALLOCATE PREPARE stmt2;
/* 取出最小的分區(qū)的名稱，并刪除掉 。
? ? 注意：刪除分區(qū)會同時刪除分區(qū)內(nèi)的數(shù)據(jù)，慎重 */
? ? /*select partition_name into @P0_Name from INFORMATION_SCHEMA.PARTITIONS
? ? where table_name='tb_3a_huandan_detail' order by partition_ordinal_position limit 1;
? ? SET @s=concat('ALTER TABLE tb_3a_huandan_detail DROP PARTITION ',@P0_Name);
? ? PREPARE stmt1 FROM @s;
? ? EXECUTE stmt1;
? ? DEALLOCATE PREPARE stmt1; */
/* 提交 */
? ? COMMIT ;
?END$$

DELIMITER ;

DELIMITER ||
CREATE EVENT Partition_3Ahuadan_event
? ? ? ? ? ON SCHEDULE
? ? ? ? ? EVERY 1 day STARTS '2016-05-27 23:59:59'
? ? ? ? ? DO
? ? ? BEGIN

? ? ? ? ? CALL nres.`create_Partition_3Ahuadan`;

?END ||
DELIMITER ;