MySQL查看和新增表分区

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1、查看表分区

SELECT  partition_name part,  partition_expression expr,  partition_description descr,  FROM_DAYS(partition_description) lessthan_sendtime,  table_rowsFROM  INFORMATION_SCHEMA.partitionsWHERE  TABLE_SCHEMA = SCHEMA()  AND TABLE_NAME='el_user_category_litera'; ---这里是表名

2、添加表分区

 ALTER TABLE el_user_category_litera 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 el_user_category_litera(     id                   int not null,     sendtime                 datetime not null   primary key (id,sendtime)  ) 

创建索引：

create index Index_sid_sendtime on el_user_category_litera(     id,     sendtime  );