Manual:Watchlist table

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Manual:Contents MediaWiki database layout watchlist table


The watchlist table for each registered user contains his or her id and for all the pages the user watches, the namespace number, the page title without namespace, and a notification timestamp, used for page change notification.

Note: MediaWiki works with the assumption that when people watch pages they either watch both the talk page and the normal page, or neither. That means that for each watched page MediaWiki always automatically adds two entries: One for the page and one for its talk page. E.g. when the user watches the Main Page, then there will be two rows in the database table: One for the Main Page in namespace 0 and one for the Main Page in namespace 1 (which is the according talk page). Missing page rows are added by the maintenance script update.php.

Fields[edit | edit source]

wl_user[edit | edit source]

This is the key to user.user_id.

wl_namespace[edit | edit source]

This is the key to page_namespace.

wl_title[edit | edit source]

This is the key to page_title.

wl_notificationtimestamp[edit | edit source]

MediaWiki version: 1.4

This is the timestamp of the first change to the page made by another user after the last visit by the watching user; the timestamp is cleared when the user visits the page. When the timestamp is updated, notification email may be sent.

The timestamp is always cleared (made NULL) when the user visits the page, whatever their personal settings, as long as either either of $wgUseEnotif or $wgShowUpdatedMarker is true.


MediaWiki version: 1.26

Since git #836ad263, the timestamp update may be deferred to the job queue.

Schema summary[edit | edit source]

(Current as of v1.23.)

MediaWiki version: 1.19


"DESCRIBE watchlist;" in version 1.19 gives the following:

mysql> DESCRIBE mw_watchlist;
+--------------------------+------------------+------+-----+---------+-------+
| Field                    | Type             | Null | Key | Default | Extra |
+--------------------------+------------------+------+-----+---------+-------+
| wl_user                  | int(10) unsigned | NO   | PRI | NULL    |       |
| wl_namespace             | int(11)          | NO   | PRI | 0       |       |
| wl_title                 | varbinary(255)   | NO   | PRI |         |       |
| wl_notificationtimestamp | varbinary(14)    | YES  |     | NULL    |       |
+--------------------------+------------------+------+-----+---------+-------+
4 rows in set (0.00 sec)


MediaWiki version: 1.9
mysql> describe watchlist;
+--------------------------+-----------------+------+-----+---------+-------+
| Field                    | Type            | Null | Key | Default | Extra |
+--------------------------+-----------------+------+-----+---------+-------+
| wl_user                  | int(5) unsigned | NO   | PRI | NULL    |       |
| wl_namespace             | int(11)         | NO   | PRI | 0       |       |
| wl_title                 | varchar(255)    | NO   | PRI | NULL    |       |
| wl_notificationtimestamp | varchar(14)     | YES  |     | NULL    |       |
+--------------------------+-----------------+------+-----+---------+-------+
4 rows in set (0.01 sec)


MediaWiki version: 1.8

"DESCRIBE watchlist;" in version 1.8 gives the following:

+--------------------------+-----------------+------+-----+---------+-------+
| Field                    | Type            | Null | Key | Default | Extra |
+--------------------------+-----------------+------+-----+---------+-------+
| wl_user                  | int(5) unsigned | NO   | PRI | NULL    |       |
| wl_namespace             | int(11)         | NO   | PRI | 0       |       |
| wl_title                 | varchar(255)    | NO   | PRI | NULL    |       |
| wl_notificationtimestamp | varchar(14)     | YES  |     | NULL    |       |
+--------------------------+-----------------+------+-----+---------+-------+


MediaWiki version: 1.5

"DESCRIBE watchlist;" in version 1.5 gives the following:

+--------------------------+-----------------+------+-----+---------+-------+
| Field                    | Type            | Null | Key | Default | Extra |
+--------------------------+-----------------+------+-----+---------+-------+
| wl_user                  | int(5) unsigned | NO   | PRI |         |       |
| wl_namespace             | int(11)         | NO   | PRI | 0       |       |
| wl_title                 | varchar(255)    | NO   | PRI |         |       |
| wl_notificationtimestamp | varchar(14)     | NO   |     | 0       |       |
+--------------------------+-----------------+------+-----+---------+-------+


MediaWiki version: 1.4

"DESCRIBE watchlist;" in version 1.4 gives the following:

+------------------+---------------------+------+-----+---------+----------------+
| Field            | Type                | Null | Key | Default | Extra          |
+------------------+---------------------+------+-----+---------+----------------+
| wl_user          | int(5) unsigned     |      |     |         |                |
| wl_namespace     | tinyint(2) unsigned |      |     |    0    |                |
| wl_title         | varchar(255) binary |      |     |    ''   |                |
+------------------+---------------------+------+-----+---------+----------------+

Some of this information was adapted from schema.doc in the MediaWiki docs/ directory.

Databases Engines: MySQLOraclePostgreSQLSQLite
Technical documentation: Schema (tables) – API property associationsField prefixesPrimary key storage in other fieldsWikimedia extension tables
Configuration: SettingsSharing
Development: AccessOptimizationPolicyUpdaterExtension schema updatesPatch file
Core tables: archivecategorycategorylinkschange_tagconfigexternallinksfilearchivehitcounterimageimagelinksinterwikiiwlinksipblocksjobl10n_cachelanglinkslogginglog_searchmsg_resourcemsg_resource_linksmodule_depsobjectcacheoldimagepagepagelinkspage_propspage_restrictionsprotected_titlesquerycachequerycachetwoquerycache_inforecentchangesredirectrevisionsearchindexsitessite_statstag_summarytemplatelinkstexttranscacheupdateloguploadstashuseruser_former_groupsuser_groupsuser_newtalkuser_propertiesvalid_tagwatchlist