Manual:Objectcache table

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MediaWiki database layout

Objectcache table

Objectcache table is used for a few generic cache operations if not using Memcached.

MediaWiki version:

1.18

describe objectcache;

+---------+----------------+------+-----+---------+-------+
| Field   | Type           | Null | Key | Default | Extra |
+---------+----------------+------+-----+---------+-------+
| keyname | varbinary(255) |      | PRI |         |       |
| value   | mediumblob     | YES  |     | NULL    |       |
| exptime | datetime       | YES  | MUL | NULL    |       |
+---------+----------------+------+-----+---------+-------+

MediaWiki version:

1.8

DESCRIBE objectcache; in MediaWiki 1.8 gives the following:

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

MediaWiki version:

1.9

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

MediaWiki version:

1.11

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

MediaWiki version:

1.12

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

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