我有以下表结构,其中包含实时数据:
CREATE TABLE IF NOT EXISTS `userstatistics` (
`user_id` int(10) unsigned NOT NULL,
`number_logons` int(7) unsigned NOT NULL DEFAULT '0',
`number_profileminiviews` int(7) unsigned NOT NULL DEFAULT '0',
`number_profilefullviews` int(7) unsigned NOT NULL DEFAULT '0',
`number_mailsreceived` int(7) unsigned NOT NULL DEFAULT '0',
`number_interestreceived` int(7) unsigned NOT NULL DEFAULT '0',
`number_favouratesreceived` int(7) unsigned NOT NULL DEFAULT '0',
`number_friendshiprequestreceived` int(7) unsigned NOT NULL DEFAULT '0',
`number_imchatrequestreceived` int(7) unsigned NOT NULL DEFAULT '0',
`yearweek` int(6) unsigned NOT NULL DEFAULT '0',
PRIMARY KEY (`user_id`,`yearweek`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1;
我想将其转换为具有以下结构的分区表:
CREATE TABLE IF NOT EXISTS `userstatistics` (
`user_id` int(10) unsigned NOT NULL,
`number_logons` int(7) unsigned NOT NULL DEFAULT '0',
`number_profileminiviews` int(7) unsigned NOT NULL DEFAULT '0',
`number_profilefullviews` int(7) unsigned NOT NULL DEFAULT '0',
`number_mailsreceived` int(7) unsigned NOT NULL DEFAULT '0',
`number_interestreceived` int(7) unsigned NOT NULL DEFAULT '0',
`number_favouratesreceived` int(7) unsigned NOT NULL DEFAULT '0',
`number_friendshiprequestreceived` int(7) unsigned NOT NULL DEFAULT '0',
`number_imchatrequestreceived` int(7) unsigned NOT NULL DEFAULT '0',
`yearweek` int(6) unsigned NOT NULL DEFAULT '0',
PRIMARY KEY (`user_id`,`yearweek`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
/*!50100 PARTITION BY RANGE (yearweek)
(PARTITION userstats_201108 VALUES LESS THAN (201108) ENGINE = InnoDB,
PARTITION userstats_201109 VALUES LESS THAN (201109) ENGINE = InnoDB,
PARTITION userstats_201110 VALUES LESS THAN (201110) ENGINE = InnoDB,
PARTITION userstats_201111 VALUES LESS THAN (201111) ENGINE = InnoDB,
PARTITION userstats_201112 VALUES LESS THAN (201112) ENGINE = InnoDB,
PARTITION userstats_201113 VALUES LESS THAN (201113) ENGINE = InnoDB,
PARTITION userstats_201114 VALUES LESS THAN (201114) ENGINE = InnoDB,
PARTITION userstats_201115 VALUES LESS THAN (201115) ENGINE = InnoDB,
PARTITION userstats_201116 VALUES LESS THAN (201116) ENGINE = InnoDB,
PARTITION userstats_201117 VALUES LESS THAN (201117) ENGINE = InnoDB,
PARTITION userstats_201118 VALUES LESS THAN (201118) ENGINE = InnoDB,
PARTITION userstats_201119 VALUES LESS THAN (201119) ENGINE = InnoDB,
PARTITION userstats_201120 VALUES LESS THAN (201120) ENGINE = InnoDB,
PARTITION userstats_201121 VALUES LESS THAN (201121) ENGINE = InnoDB,
PARTITION userstats_max VALUES LESS THAN MAXVALUE ENGINE = InnoDB) */;
我怎样才能进行这种转换?
简单的把第二条SQL语句的第一行改成
ALTER TABLE 'userstatistics' (
这样可以吗?
从 MySQL 5.0 到 5.1。
最佳答案
首先,您需要运行 MySQL 5.1 或更高版本。 MySQL 5.0 不支持分区。
其次,请注意单引号(分隔字符串和日期)和反引号(分隔 MySQL 中的表和列标识符)之间的区别。在适当的地方使用正确的类型。我提到这一点,因为您的示例使用了错误类型的引号:
ALTER TABLE 'userstatistics' (
应该是:
ALTER TABLE `userstatistics` (
最后,是的,您可以使用 ALTER TABLE 将表重组为分区。这是我在 MySQL 5.1.57 上测试的语句的精确复制和粘贴:
ALTER TABLE userstatistics PARTITION BY RANGE (yearweek) (
PARTITION userstats_201108 VALUES LESS THAN (201108) ENGINE = InnoDB,
PARTITION userstats_201109 VALUES LESS THAN (201109) ENGINE = InnoDB,
PARTITION userstats_201110 VALUES LESS THAN (201110) ENGINE = InnoDB,
PARTITION userstats_201111 VALUES LESS THAN (201111) ENGINE = InnoDB,
PARTITION userstats_201112 VALUES LESS THAN (201112) ENGINE = InnoDB,
PARTITION userstats_201113 VALUES LESS THAN (201113) ENGINE = InnoDB,
PARTITION userstats_201114 VALUES LESS THAN (201114) ENGINE = InnoDB,
PARTITION userstats_201115 VALUES LESS THAN (201115) ENGINE = InnoDB,
PARTITION userstats_201116 VALUES LESS THAN (201116) ENGINE = InnoDB,
PARTITION userstats_201117 VALUES LESS THAN (201117) ENGINE = InnoDB,
PARTITION userstats_201118 VALUES LESS THAN (201118) ENGINE = InnoDB,
PARTITION userstats_201119 VALUES LESS THAN (201119) ENGINE = InnoDB,
PARTITION userstats_201120 VALUES LESS THAN (201120) ENGINE = InnoDB,
PARTITION userstats_201121 VALUES LESS THAN (201121) ENGINE = InnoDB,
PARTITION userstats_max VALUES LESS THAN MAXVALUE ENGINE = InnoDB);
请注意,这会导致表重组,因此如果您在此表中已有大量数据,则需要一段时间才能运行。具体多长时间取决于您拥有多少数据、您的硬件速度和其他因素。请注意,在重组表时,它被锁定并且无法被其他查询读取和写入。
关于mysql - 转换为分区表,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/7128249/