126-mysql分区

重新定义range分区表:

ALTER TABLE `cfg_log` 
DROP PRIMARY KEY,
ADD PRIMARY KEY (`unid`, `create_date`) USING BTREE;
Alter table cfg_log partition by range(YEARWEEK(create_date))
(
partition p1 values less than (202001),
partition p2 values less than (202101),
partition p3 values less than (202110),
partition p4 values less than (202120),
partition p5 values less than (202130),
partition p6 values less than (202140),
partition p999 values less than MAXVALUE
); 

删除、新增分区：

alter table cfg_log drop partition p999;
alter table cfg_log add partition (partition p7 values less than (202022),
partition p999 values less than MAXVALUE);