MYSQL-- 每半月一个分区，自动维护
建表语句

drop table if exists terminal_parameter;
CREATE TABLE `terminal_parameter` (
  `terminal_parameter_id` int(11) NOT NULL AUTO_INCREMENT,
  `serial` int(11) DEFAULT NULL,
  `network_type` char(1) DEFAULT NULL,
  `mcc` int(8) DEFAULT NULL,
  `mnc` int(8) DEFAULT NULL,
  `lac` int(8) DEFAULT NULL,
  `cellid` int(8) DEFAULT NULL,
  `bsic_psc` int(8) DEFAULT NULL,
  `ta_ec_io` int(8) DEFAULT NULL,
  `bcch_rxlev_rscp` int(8) DEFAULT NULL,
  `arfcn_uarfcn` int(8) DEFAULT NULL,
  `rxq` int(8) DEFAULT NULL,
  `c1` int(8) DEFAULT NULL,
  `c2` int(8) DEFAULT NULL,
  `signal_intensity` int(8) DEFAULT NULL,
  `error_rate` int(8) DEFAULT NULL,
  `alarm_type` varchar(16) DEFAULT NULL,
  `txpower` int(8) DEFAULT NULL,
  `small_running_number` int(8) DEFAULT NULL,
  `createtime` datetime NOT NULL,
  `userid` int(8) NOT NULL,
  `terminal_id` int(8) DEFAULT NULL,
  `state` char(1) DEFAULT '0',
  `order_definition_id` int(8) DEFAULT NULL,
  `order_code` varchar(20) DEFAULT NULL,
  `charg_voltage` float(8,2) DEFAULT NULL,
  `battery_voltage` float(8,2) DEFAULT NULL,
  `temprad` float(8,2) DEFAULT NULL,
  `run_state` int(8) DEFAULT NULL,
  `switching_value1` int(8) DEFAULT NULL,
  `switching_value2` int(8) DEFAULT NULL,
  `bcch_freq` int(8) DEFAULT NULL,
  `rxlev` int(8) DEFAULT NULL,
  `rxlev_full` int(8) DEFAULT NULL,
  `rxlev_sub` int(8) DEFAULT NULL,
  `rxqual` int(8) DEFAULT NULL,
  `rxqual_full` int(8) DEFAULT NULL,
  `rxqual_sub` int(8) DEFAULT NULL,
  `idle_ts` int(8) DEFAULT NULL,
  `timing_advance` int(8) DEFAULT NULL,
  `tch_efr_out` int(8) DEFAULT NULL,
  `tch_efr_in` int(8) DEFAULT NULL,
  `dtx` int(8) DEFAULT NULL,
  `major_cycle_frequency` int(8) DEFAULT NULL,
  PRIMARY KEY (`terminal_parameter_id`,`createtime`),
  KEY `idx_createtime` (`createtime`),
  KEY `idx_terminal_id` (`terminal_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8
PARTITION BY RANGE(TO_DAYS (createtime))
(
PARTITION p20101115 VALUES LESS THAN (TO_DAYS('2010-11-15')),
PARTITION p20101130 VALUES LESS THAN (TO_DAYS('2010-11-30')),
PARTITION p20101215 VALUES LESS THAN (TO_DAYS('2010-12-15')),
PARTITION p20101231 VALUES LESS THAN (TO_DAYS('2010-12-31')),
PARTITION p20110115 VALUES LESS THAN (TO_DAYS('2011-01-15')),
PARTITION p20110131 VALUES LESS THAN (TO_DAYS('2011-01-31')),
PARTITION p20110215 VALUES LESS THAN (TO_DAYS('2011-02-15')),
PARTITION p20110228 VALUES LESS THAN (TO_DAYS('2011-02-28')),
PARTITION p20110315 VALUES LESS THAN (TO_DAYS('2011-03-15')),
PARTITION p20110331 VALUES LESS THAN (TO_DAYS('2011-03-31')),
PARTITION p20110415 VALUES LESS THAN (TO_DAYS('2011-04-15')),
PARTITION p20110430 VALUES LESS THAN (TO_DAYS('2011-04-30'))
);


存储过程代码：

* 每隔15天执行一次
/* 程序功能：循环使用分区，每半个月一个分区，保留6个月的数据
时间：2010-11-09 */
drop procedure if exists Set_Partition;
create procedure Set_Partition()
begin
/* 事务回滚，其实放这里没什么作用，ALTER TABLE是隐式提交，回滚不了的。*/
    declare exit handler for sqlexception rollback;
    start TRANSACTION;

/* 到系统表查出这个表的最大分区，得到最大分区的日期。在创建分区的时候，名称就以日期格式存放，方便后面维护 */
    select REPLACE(partition_name,'p','') into @P12_Name from INFORMATION_SCHEMA.PARTITIONS where TABLE_SCHEMA='mydb_1' and table_name='terminal_parameter' order by partition_ordinal_position DESC limit 1;

/* 判断最大分区的时间段，如果是前半个月的，那么根据情况需要加13,14,15,16天
   如果是后半个月的，那么直接加1