create table order_history( id bigint unsigned auto_increment primary key,order_id bigint unsigned not null,customer_id bigint unsigned not null,goods_id bigint unsigned not null,payment_id bigint unsigned not null,details text,comments text,order_date datetime not null,status tinyint);alter table order_history algorithm=inplace, lock=none, drop primary key, add primary key (id, order_date);-- algorithm=inplace, lock=none 是 rds for mysql 5.6 支援的 online ddl 特性。-- 如果要修改主鍵，刪除主鍵和新增主鍵建議放在一條語句中，以便充分利用 5.6 版本的 online ddl 特性。alter table order_history partition by range columns (order_date) (partition p1606 values less than ('2016-07-01'),partition p1607 values less than ('2016-08-01'),partition p1608 values less than ('2016-09-01'),partition p1609 values less than ('2016-10-01'),partition p1610 values less than ('2016-11-01'),partition p1611 values less than ('2016-12-01'),partition p1612 values less than ('2017-01-01'),partition p0 values less than maxvalue);-- 將資料按月份分割槽delimiter //drop procedure sp_order_his_rotate//create procedure sp_order_his_rotate ()begin declare todrop_par varchar(10) default null; declare toadd_par varchar(10) default null; declare toadd_day varchar(10) default null; declare last_par varchar(10) default null; declare new_par varchar(10) default null; declare v_sql varchar(200) default null; select date_format(date_sub(curdate(), interval 6 month), 'p%y%m') into todrop_par; select date_format(date_add(curdate(), interval 1 month), 'p%y%m') into toadd_par; select date_format(date_add(curdate()-day(curdate())+1,interval 2 month), '%y-%m-%d') into toadd_day; select partition_name into last_par from information_schema.partitions where table_name = 'order_history' and table_schema = 'db_name' and partition_description != 'maxvalue' order by partition_description asc limit 1; if todrop_par = last_par then select concat('alter table order_history drop partition ',todrop_par,';') into v_sql; set @v_sql=v_sql; prepare stmt from @v_sql; execute stmt; deallocate prepare stmt; end if; select partition_name into new_par from information_schema.partitions where table_name = 'order_history' and table_schema = 'db_name' and partition_description != 'maxvalue' order by partition_description desc limit 1; if toadd_par != new_par then select concat('alter table order_history reorganize partition p0 into (partition ', toadd_par, ' values less than (''', toadd_day,'''), partition p0 values less than (maxvalue));') into v_sql; set @v_sql=v_sql; prepare stmt from @v_sql; execute stmt; deallocate prepare stmt; end if;end;//delimiter ;drop event if exists order_his_rotate;delimiter //create event order_his_rotate on schedule every 1 month starts '2016-12-28 02:00:00' on completion preserve enable dobegin call sp_order_his_rotate();end;//delimiter ;
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