MYSQL查看和新增表分区

MYSQL查看和新增表分区 1、查看表分区 SELECT partition_name part, partition_expression expr, partition_description descr, FROM_DAYS(partition_description) lessthan_sendtime, table_rows FROM INFORMATION_SCHEMA.partitions WHERE TABLE_SCHEMA =

MYSQL查看和新增表分区

1、查看表分区

SELECT
partition_name part,
partition_expression expr,
partition_description descr,
FROM_DAYS(partition_description) lessthan_sendtime,
table_rows
FROM
INFORMATION_SCHEMA.partitions
WHERE
TABLE_SCHEMA = SCHEMA()
AND TABLE_NAME='td_sendmessagelog'; ---这里是表名

2、添加表分区

ALTER TABLE td_sendmessagelog ADD PARTITION (
PARTITION p20150210 VALUES LESS THAN (TO_DAYS('2015-02-10')),
PARTITION p20150220 VALUES LESS THAN (TO_DAYS('2015-02-20')),
PARTITION p20150301 VALUES LESS THAN (TO_DAYS('2015-03-01')),
PARTITION p20150310 VALUES LESS THAN (TO_DAYS('2015-03-10')),
PARTITION p20150320 VALUES LESS THAN (TO_DAYS('2015-03-20')),
PARTITION p20150401 VALUES LESS THAN (TO_DAYS('2015-04-01')),
PARTITION p20150410 VALUES LESS THAN (TO_DAYS('2015-04-10')),
PARTITION p20150420 VALUES LESS THAN (TO_DAYS('2015-04-20')),
PARTITION p20150501 VALUES LESS THAN (TO_DAYS('2015-05-01')),
PARTITION pmax VALUES LESS THAN (maxvalue)
);

注意：创建表分区，要指定对应的列。上面例子，用的是一个时间列（sendtime）

创建表过程如下（注意指定的primary key）：

create table td_sendmessagelog
(
id int not null,
sendtime datetime not null
primary key (id,sendtime)
)

创建索引：

create index Index_sid_sendtime on td_sendmessagelog
(
sid,
sendtime
);