mysql創建表分區

MySQL創建表分區

create table erp_bill_index(
    id int primary key auto_increment,
    addtime datetime
);
insert into erp_bill_index(addtime) 
values
('2018-02-01 12:00:00'),
('2018-03-01 12:00:00'),
('2018-04-01 12:00:00'),
('2018-05-01 12:00:00'),
('2018-06-01 12:00:00'),
('2018-07-01 12:00:00'),
('2018-08-01 12:00:00'),
('2018-09-01 12:00:00'),
('2018-10-01 12:00:00'),
('2018-11-01 12:00:00'),
('2018-12-01 12:00:00'),
('2019-01-01 12:00:00'),
('2019-02-01 12:00:00'),
('2019-03-01 12:00:00'),
('2019-04-01 12:00:00'),
('2019-05-01 12:00:00'),
('2019-06-01 12:00:00'),
('2019-07-01 12:00:00'),
('2019-08-01 12:00:00'),
('2019-09-01 12:00:00'),
('2019-10-01 12:00:00'),
('2019-11-01 12:00:00'),
('2019-12-01 12:00:00');

alter table erp_bill_index drop primary key;-- 刪除主鍵，在刪除主鍵的時候，這個自增會讓該語句執行失敗，先取消字段自增，然后執行該語句后，再加上自增
alter table erp_bill_index add primary key(id,addtime);-- 添加主鍵，（分區要求：分區中使用的字段必須都包含在主鍵當中）

-- 創建分區(分區要求：分區中使用的字段必須都包含在主鍵當中)
ALTER TABLE erp_bill_index PARTITION by RANGE(to_days(addtime))
(
  PARTITION p201801 VALUES LESS THAN (to_days('2018-02-01')),
  PARTITION p201802 VALUES LESS THAN (to_days('2018-03-01')),
  PARTITION p201803 VALUES LESS THAN (to_days('2018-04-01')),
  PARTITION p201804 VALUES LESS THAN (to_days('2018-05-01')),
  PARTITION p201805 VALUES LESS THAN (to_days('2018-06-01')),
  PARTITION p201806 VALUES LESS THAN (to_days('2018-07-01')),
  PARTITION p201807 VALUES LESS THAN (to_days('2018-08-01')),
  PARTITION p201808 VALUES LESS THAN (to_days('2018-09-01')),
  PARTITION p201809 VALUES LESS THAN (to_days('2018-10-01')),
  PARTITION p201810 VALUES LESS THAN (to_days('2018-11-01')),
  PARTITION p201811 VALUES LESS THAN (to_days('2018-12-01')),
  PARTITION p201812 VALUES LESS THAN (to_days('2019-01-01')),
  PARTITION p201901 VALUES LESS THAN (to_days('2019-02-01')),
  PARTITION p201902 VALUES LESS THAN (to_days('2019-03-01')),
  PARTITION p201903 VALUES LESS THAN (to_days('2019-04-01')),
  PARTITION p300012 VALUES LESS THAN (9223372036854775807) -- 剩下的放在一個分區中，當需要對這部分進行再次分區的時候，需要先刪除該分區，然后再添加多個分區
);


-- 刪除分區
ALTER TABLE erp_bill_index DROP PARTITION p300012;
-- 添加新的分區
alter table erp_bill_index add PARTITION
(
    PARTITION p201905 VALUES LESS THAN (to_days('2019-06-01')) ENGINE = InnoDB,
    PARTITION p300012 VALUES LESS THAN (9223372036854775807)
);

mysql執行分析參考：https://blog.csdn.net/weixin_45310179/article/details/99591496