Question

我正在尝试对表进行分区，这是它的结构：

CREATE TABLE IF NOT EXISTS `actions` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `uuid` varchar(36) COLLATE utf8_unicode_ci DEFAULT NULL,
  `date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  `username` varchar(16) COLLATE utf8_unicode_ci NOT NULL,
  `event` varchar(16) COLLATE utf8_unicode_ci NOT NULL,
  `obj_id` int(11) unsigned NOT NULL,
  `inline` text COLLATE utf8_unicode_ci NOT NULL,
  `meta` varchar(255) COLLATE utf8_unicode_ci NOT NULL,
  PRIMARY KEY (`id`,`date`),
  KEY `event` (`event`),
  KEY `obj_id` (`obj_id`),
  KEY `username` (`username`),
  KEY `date` (`date`),
  KEY `user_date` (`username`,`date`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci
 PARTITION BY RANGE ( UNIX_TIMESTAMP(date))
(PARTITION actions_0 VALUES LESS THAN (1209592800) ENGINE = InnoDB, # 2008-05-01
 PARTITION actions_images_1 VALUES LESS THAN (1212271200) ENGINE = InnoDB, # 2008-06-01
 [...]
 PARTITION actions_67 VALUES LESS THAN (1388530800) ENGINE = InnoDB,
 PARTITION actions_68 VALUES LESS THAN MAXVALUE ENGINE = InnoDB)

现在，当我选择特定日期时似乎没问题：

EXPLAIN PARTITIONS SELECT * FROM `actions` WHERE `date` = '2008-05-04 16:13:15' ;

+----+-------------+----------------+------------------
| id | select_type | table          | partitions       
+----+-------------+----------------+------------------
|  1 | SIMPLE      | actions        | actions_1

但如果我这样查询：

EXPLAIN PARTITIONS SELECT * FROM `actions` WHERE `date` > '2008-05-04 16:13:15' AND `date` < '2008-05-05 16:13:15';

Mysql扫描所有actions_N表，我做错了什么？这是我第一次使用分区，但我按照手册操作，找不到我错的地方。

谢谢！

Answer 1

好吧，这是一个mysql错误 http://bugs.mysql.com/bug.php?id=28928

Answer 2

RANGE COLUMNS不支持使用除DATE或DATETIME以外的日期或时间类型的分区列。

DATE和DATETIME。使用与日期或时间相关的其他数据类型的列不支持作为分区列。

Mysql，分区不适用于日期范围

2 个答案: