Manual:Objectcache table/ja

objectcache テーブルは、 を使用していない場合に、少数の汎用キャッシュ操作のために使用されます. Its content can be safely deleted and excluded from backups as it will be regenerated when needed.

See for how this cache is used and how it can be configured.

keyname
Unique identifier of the cached object. e.g. :user:id:

value
Cached object.

exptime
Date the cache entry should be expired (in seconds), and therefore removed.

modtoken
?

flags
?

スキーマの要約
+--+--+--+-+---+---+ +--+--+--+-+---+---+ +--+--+--+-+---+---+
 * Field   | Type             | Null | Key | Default           | Extra |
 * keyname | varbinary(255)   | NO   | PRI |                   |       |
 * value   | mediumblob       | YES  |     | NULL              |       |
 * exptime | binary(14)       | NO   | MUL | NULL              |       |
 * modtoken | varbinary(17)   | NO   |     | 00000000000000000 |       |
 * flags   | int(10) unsigned | YES  |     | NULL              |       |

+-++--+-+-+---+ +-++--+-+-+---+ +-++--+-+-+---+
 * Field  | Type           | Null | Key | Default | Extra |
 * keyname | varbinary(255) | NO  | PRI |         |       |
 * value  | mediumblob     | YES  |     | NULL    |       |
 * exptime | binary(14)    | NO   | MUL | NULL    |       |

+-++--+-+-+---+ +-++--+-+-+---+ +-++--+-+-+---+
 * Field  | Type           | Null | Key | Default | Extra |
 * keyname | varbinary(255) | NO  | PRI |         |       |
 * value  | mediumblob     | YES  |     | NULL    |       |
 * exptime | datetime      | YES  | MUL | NULL    |       |

+-+--+--+-+-+---+ +-+--+--+-+-+---+ +-+--+--+-+-+---+
 * Field  | Type             | Null | Key | Default | Extra |
 * keyname | char(255) binary | NO  | PRI | NULL    |       |
 * value  | mediumblob       | YES  |     | NULL    |       |
 * exptime | datetime        | YES  | MUL | NULL    |       |