用alter可以操作表增加分區
ALTER TABLE `xxx_table`
PARTITION BY RANGE (id)
(
PARTITION p1 VALUES LESS THAN (10000),
PARTITION p2 VALUES LESS THAN (20000),
PARTITION p3 VALUES LESS THAN (30000),
PARTITION p4 VALUES LESS THAN MAXVALUE
)
測試的時候可以這樣,加快速度,一般還是要創建個新表,把原表的數據複製到新表裏
分區知識補充:
- 查看分區是否起作用
explain partitions select * from xxx_table
- 從分區查找
select * from xxx_table PARTITION(p1)
- 增加分區
ALTER TABLE xxx_table ADD PARTITION(
PARTITION p1 VALUES LESS THAN ('2019-04-01 00:00:00')
);
- 合併分區
ALTER TABLE xxx_table REORGANIZE PARTITION p1,p2 INTO (PARTITION p3 VALUES less than('2019-01-01 00:00:00'));
- 刪除分區(會把裏面的數據也刪除掉)
alter table xxx_table drop partition p1
- 刪除分區，保留數據
alter table xxx_table remove partitioning