MYSQL查看和新增表分区

幼敏悟过人,读书辄成诵。这篇文章主要讲述MYSQL查看和新增表分区相关的知识,希望能为你提供帮助。
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
(
idint not null,
sendtimedatetime not null
primary key (id,sendtime)
)

创建索引:
create index Index_sid_sendtime on td_sendmessagelog
(
sid,
sendtime
);









【MYSQL查看和新增表分区】


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