有一个表tb_3a_huandan_detail，每天有300W左右的数据。查询太慢了，网上了解了一下，可以做表分区。由于数据较大，所以决定做定时任务每天执行存过自动进行分区。
1、在进行自动增加分区前一定得先对表手动分几个区
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'))
)2、分区存过如下：
DELIMITER $$
USE `nres`$$
DROP PROCEDURE IF EXISTS `create_Partition_3Ahuadan`$$
CREATE DEFINER=`nres`@`%` PROCEDURE `create_Partition_3Ahuadan`()
BEGIN
DECLARE EXIT HANDLER FOR SQLEXCEPTION ROLLBACK;
START TRANSACTION;
SELECT REPLACE(partition_name,'p','') INTO @P12_Name FROM INFORMATION_SCHEMA.PARTITIONS
WHERE table_name='tb_3a_huandan_detail' ORDER BY partition_ordinal_position DESC LIMIT 1;
SET @Max_date= DATE(DATE_ADD(@P12_Name+0, INTERVAL 1 DAY))+0;
SET @s1=CONCAT('ALTER TABLE tb_3a_huandan_detail ADD PARTITION (PARTITION p',@Max_date,' VALUES LESS THAN (TO_DAYS (''',DATE(@Max_date),''')))');
SELECT @s1;
PREPARE stmt2 FROM @s1;
EXECUTE stmt2;
DEALLOCATE PREPARE stmt2;
COMMIT ;
END$$
DELIMITER ;3、增加定时事件
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 ;参考：
http://blog.csdn.net/m582445672/article/details/7670743
http://blog.chinaUnix.net/uid-24086995-id-127389.html
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