Every log action in MediaWiki is logged in thelogging table.Users can see those edits onSpecial:Log, except for a few restricted logs (like Special:Log/suppress).

The contents of this table is what you see on theSpecial:Log page.For example:

• 14:18, 25 June 2008 Jacksprat (Talk | contribs| block) uploaded "Image:Climb.jpg" (Added this image for the climbing page)

Primary key for the table.rc_logid is a foreign key linking to this column.

The type of the log action, or the "log type".

You can filter by some values of this type onSpecial:Log.

Comparable torc_log_type.

Example values fromsome Wikimedia wikis are as follows (including now-obsolete logs and several extensions):

The action performed.There may be multiple actions possible for a given type: for example, an entry with the typedelete may have the actiondelete orrestore, etc.Comparable torc_log_action.See alsoAPI:Logevents.SeeManual:Log actions.

The time the action was performed, in the timestamp format MediaWiki uses everywhere in the database: yyyymmddhhmmss ("14:18, 25 June 2008" in example).Has the same value as the correspondingrecentchanges.rc_timestamp andrevision.rev_timestamp.Does not necessarily have the same value as the correspondingimage.img_timestamp, in the case of file uploads.

Theid of the user who performed the action.This is a reference into theuser table (the user id of "Jacksprat" in example).Comparable torc_user andrev_user.

Deprecated in favor oflog_actor.

user_name of the user who performed the action, intended primarily for anonymous users, fillable by maintenance/populateLogUsertext.php.Comparable torc_user_text andrev_user_text.

Deprecated in favor oflog_actor.

This is a foreign key toactor_id in theactor table, corresponding to the user (registered or anonymous) who performed the action.

Thenamespace of the affected page.Together with log_title, this is a reference into thepage table ("Image:Climb.jpg" in example).Comparable torc_namespace.

• Special:Renameuser with log_type and log_action being either "" or "renameuser"

• Special:Userlogin with log_type being "newusers" and log_action e.g. being "create"

Thetitle of the affected page.Together with log_namespace, this is a reference into thepage table.Comparable torc_title

The title is also known as the log entry's 'target'.

For user blocks, this is the blocked user's username.For thanks action, this is the thanked user's username.

Thepage_id that this log action is about.Comparable torc_cur_id andrev_page.In the case of a page move, this is set to the page_id of the moved page (sinceGerrit change 157872).Formerly, it was the page_id of the redirect, or 0 if the page was moved without creating a redirect.

The comment given for the action; that is the upload comment for uploads, the deletion comment for deletions, etc.Comparable torc_comment andrev_comment.

(deprecated); log_comment_id and thecomment table should be used instead!

This is a foreign key tocomment_id in thecomment table.

Additional parameters, usually empty.Mirrored inrc_params.log_params is usually serialized, but not always; sometimes, for historical reasons, fields for log_params are separated by a newline.Anyone creating a new log type should use the PHP serialization.

For user blocks, log_params contains the duration of the block and other data, in human readable form, e.g. "2 weeks nocreate,noautoblock,noemail".For page moves, it contains a serialized array of the prefixed page title the page was moved to (i.e. inFULLPAGENAME format) and the boolean value ofnoredir.For other examples, seeManual:Log parameters.

Since 1.19, data in log_params is in a different format.For instance, if you want to filter patrol/patrol log entries excluding autopatrol, pre-1.19 log entries need:

log.log_params LIKE '%\n0'

while entries added in 1.19 and further need (serialized PHP arrays):

log.log_params LIKE '%"6::auto";i:0%'

Since1.21, log_params is always serialized for newusers log too. An entry now looks like:

mysql> select log_params, log_action from logging where log_user = 4681690;+----------------------------------+------------+| log_params                       | log_action |+----------------------------------+------------+| a:1:{s:9:"4::userid";i:4681690;} | autocreate |+----------------------------------+------------+

while it used to look like:

mysql> select log_params, log_action from logging where log_user = 2298743;+------------+------------+| log_params | log_action |+------------+------------+| 2298743    | autocreate |+------------+------------+

The numbers, e.g. the 4 in "4::userid", are used as the argument number for message keys (e.g. $1, $2,...).The numbering should start with number 4, as the first three parameters are hardcoded for every message.If there is no message key, then a number should not be used. Some data contained in log_params are also contained inlog_search to facilitate indexed queries.Log parameters are typically set using functions such asManualLogEntry::setParameters() andLogPage::addEntry().

Used with theRevisionDelete system to delete log entries.Comparable torc_deleted andrev_deleted.It is a bit field. Take the sum of the following to determine what it represents:

• 1 Action deleted
• 2 Comment deleted
• 4 User deleted
• 8 If the deleted information is restricted. If this field is not set, then onlydeletedhistory right is needed, otherwise you needsuppressrevision right. (On Wikimedia wikis, this corresponds to if admins can view the entry, or if only oversighters can)

For example, if the value is 6 (4+2), then the action would be visible, but the comment and user would not be unless you haddeletedhistory rights.

DESCRIBElogging;

+----------------+---------------------+------+-----+----------------+----------------+| Field          | Type                | Null | Key | Default        | Extra          |+----------------+---------------------+------+-----+----------------+----------------+| log_id         | int(10) unsigned    | NO   | PRI | NULL           | auto_increment || log_type       | varbinary(32)       | NO   | MUL |                |                || log_action     | varbinary(32)       | NO   |     |                |                || log_timestamp  | binary(14)          | NO   | MUL | 19700101000000 |                || log_actor      | bigint(20) unsigned | NO   | MUL | NULL           |                || log_namespace  | int(11)             | NO   | MUL | 0              |                || log_title      | varbinary(255)      | NO   |     |                |                || log_page       | int(10) unsigned    | YES  | MUL | NULL           |                || log_comment_id | bigint(20) unsigned | NO   |     | NULL           |                || log_params     | blob                | NO   |     | NULL           |                || log_deleted    | tinyint(3) unsigned | NO   |     | 0              |                |+----------------+---------------------+------+-----+----------------+----------------+

DESCRIBElogging;

+----------------+---------------------+------+-----+----------------+----------------+| Field          | Type                | Null | Key | Default        | Extra          |+----------------+---------------------+------+-----+----------------+----------------+| log_id         | int(10) unsigned    | NO   | PRI | NULL           | auto_increment || log_type       | varbinary(32)       | NO   | MUL |                |                || log_action     | varbinary(32)       | NO   |     |                |                || log_timestamp  | binary(14)          | NO   | MUL | 19700101000000 |                || log_user       | int(10) unsigned    | NO   | MUL | 0              |                || log_user_text  | varbinary(255)      | NO   | MUL |                |                || log_actor      | bigint(20) unsigned | NO   | MUL | 0              |                || log_namespace  | int(11)             | NO   | MUL | 0              |                || log_title      | varbinary(255)      | NO   |     |                |                || log_page       | int(10) unsigned    | YES  | MUL | NULL           |                || log_comment_id | bigint(20) unsigned | NO   |     | NULL           |                || log_params     | blob                | NO   |     | NULL           |                || log_deleted    | tinyint(3) unsigned | NO   |     | 0              |                |+----------------+---------------------+------+-----+----------------+----------------+

DESCRIBElogging;

+----------------+---------------------+------+-----+----------------+----------------+| Field          | Type                | Null | Key | Default        | Extra          |+----------------+---------------------+------+-----+----------------+----------------+| log_id         | int(10) unsigned    | NO   | PRI | NULL           | auto_increment || log_type       | varbinary(32)       | NO   | MUL |                |                || log_action     | varbinary(32)       | NO   |     |                |                || log_timestamp  | binary(14)          | NO   | MUL | 19700101000000 |                || log_user       | int(10) unsigned    | NO   | MUL | 0              |                || log_user_text  | varbinary(255)      | NO   | MUL |                |                || log_actor      | bigint(20) unsigned | NO   | MUL | 0              |                || log_namespace  | int(11)             | NO   | MUL | 0              |                || log_title      | varbinary(255)      | NO   |     |                |                || log_page       | int(10) unsigned    | YES  | MUL | NULL           |                || log_comment    | varbinary(767)      | NO   |     |                |                || log_comment_id | bigint(20) unsigned | NO   |     | 0              |                || log_params     | blob                | NO   |     | NULL           |                || log_deleted    | tinyint(3) unsigned | NO   |     | 0              |                |+----------------+---------------------+------+-----+----------------+----------------+

DESCRIBElogging;

+----------------+---------------------+------+-----+----------------+----------------+| Field          | Type                | Null | Key | Default        | Extra          |+----------------+---------------------+------+-----+----------------+----------------+| log_id         | int(10) unsigned    | NO   | PRI | NULL           | auto_increment || log_type       | varbinary(32)       | NO   | MUL |                |                || log_action     | varbinary(32)       | NO   |     |                |                || log_timestamp  | binary(14)          | NO   | MUL | 19700101000000 |                || log_user       | int(10) unsigned    | NO   | MUL | 0              |                || log_user_text  | varbinary(255)      | NO   | MUL |                |                || log_namespace  | int(11)             | NO   | MUL | 0              |                || log_title      | varbinary(255)      | NO   |     |                |                || log_page       | int(10) unsigned    | YES  | MUL | NULL           |                || log_comment    | varbinary(767)      | NO   |     |                |                || log_comment_id | bigint(20) unsigned | NO   |     | 0              |                || log_params     | blob                | NO   |     | NULL           |                || log_deleted    | tinyint(3) unsigned | NO   |     | 0              |                |+----------------+---------------------+------+-----+----------------+----------------+

DESCRIBElogging;

+---------------+---------------------+------+-----+----------------+----------------+| Field         | Type                | Null | Key | Default        | Extra          |+---------------+---------------------+------+-----+----------------+----------------+| log_id        | int(10) unsigned    | NO   | PRI | NULL           | auto_increment || log_type      | varbinary(32)       | NO   | MUL |                |                || log_action    | varbinary(32)       | NO   |     |                |                || log_timestamp | binary(14)          | NO   | MUL | 19700101000000 |                || log_user      | int(10) unsigned    | NO   | MUL | 0              |                || log_user_text | varbinary(255)      | NO   | MUL |                |                || log_namespace | int(11)             | NO   | MUL | 0              |                || log_title     | varbinary(255)      | NO   |     |                |                || log_page      | int(10) unsigned    | YES  | MUL | NULL           |                || log_comment   | varbinary(767)      | NO   |     |                |                || log_params    | blob                | NO   |     | NULL           |                || log_deleted   | tinyint(3) unsigned | NO   |     | 0              |                |+---------------+---------------------+------+-----+----------------+----------------+

DESCRIBElogging;

+---------------+---------------------+------+-----+----------------+----------------+| Field         | Type                | Null | Key | Default        | Extra          |+---------------+---------------------+------+-----+----------------+----------------+| log_id        | int(10) unsigned    | NO   | PRI | NULL           | auto_increment || log_type      | varbinary(32)       | NO   | MUL |                |                || log_action    | varbinary(32)       | NO   |     |                |                || log_timestamp | binary(14)          | NO   | MUL | 19700101000000 |                || log_user      | int(10) unsigned    | NO   | MUL | 0              |                || log_user_text | varbinary(255)      | NO   | MUL |                |                || log_namespace | int(11)             | NO   | MUL | 0              |                || log_title     | varbinary(255)      | NO   |     |                |                || log_page      | int(10) unsigned    | YES  | MUL | NULL           |                || log_comment   | varbinary(255)      | NO   |     |                |                || log_params    | blob                | NO   |     | NULL           |                || log_deleted   | tinyint(3) unsigned | NO   |     | 0              |                |+---------------+---------------------+------+-----+----------------+----------------+

DESCRIBElogging;

+---------------+---------------------+------+-----+----------------+----------------+| Field         | Type                | Null | Key | Default        | Extra          |+---------------+---------------------+------+-----+----------------+----------------+| log_id        | int(10) unsigned    | NO   | PRI | NULL           | auto_increment || log_type      | varbinary(32)       | NO   | MUL |                |                || log_action    | varbinary(32)       | NO   |     |                |                || log_timestamp | binary(14)          | NO   | MUL | 19700101000000 |                || log_user      | int(10) unsigned    | NO   | MUL | 0              |                || log_user_text | varbinary(255)      | NO   |     |                |                || log_namespace | int(11)             | NO   | MUL | 0              |                || log_title     | varbinary(255)      | NO   |     |                |                || log_page      | int(10) unsigned    | YES  | MUL | NULL           |                || log_comment   | varbinary(255)      | NO   |     |                |                || log_params    | blob                | NO   |     | NULL           |                || log_deleted   | tinyint(3) unsigned | NO   |     | 0              |                |+---------------+---------------------+------+-----+----------------+----------------+

DESCRIBElogging;

+---------------+---------------------+------+-----+----------------+----------------+| Field         | Type                | Null | Key | Default        | Extra          |+---------------+---------------------+------+-----+----------------+----------------+| log_id        | int(10) unsigned    | NO   | PRI | NULL           | auto_increment || log_type      | varbinary(10)       | NO   | MUL |                |                || log_action    | varbinary(10)       | NO   |     |                |                || log_timestamp | binary(14)          | NO   | MUL | 19700101000000 |                || log_user      | int(10) unsigned    | NO   | MUL | 0              |                || log_namespace | int(11)             | NO   | MUL | 0              |                || log_title     | varbinary(255)      | NO   |     |                |                || log_comment   | varbinary(255)      | NO   |     |                |                || log_params    | blob                | NO   |     | NULL           |                || log_deleted   | tinyint(3) unsigned | NO   |     | 0              |                |+---------------+---------------------+------+-----+----------------+----------------+

DESCRIBElogging;

+---------------+---------------------+------+-----+----------------+----------------+| Field         | Type                | Null | Key | Default        | Extra          |+---------------+---------------------+------+-----+----------------+----------------+| log_id        | int(10) unsigned    | NO   | PRI | NULL           | auto_increment || log_type      | varbinary(10)       | NO   | MUL |                |                || log_action    | varbinary(10)       | NO   |     |                |                || log_timestamp | binary(14)          | NO   | MUL | 19700101000000 |                || log_user      | int(10) unsigned    | NO   | MUL | 0              |                || log_namespace | int(11)             | NO   | MUL | 0              |                || log_title     | varbinary(255)      | NO   |     |                |                || log_comment   | varbinary(255)      | NO   |     |                |                || log_params    | blob                | NO   |     | NULL           |                || log_deleted   | tinyint(3) unsigned | NO   |     | 0              |                |+---------------+---------------------+------+-----+----------------+----------------+

DESCRIBElogging;

+---------------+---------------------+------+-----+----------------+----------------+| Field         | Type                | Null | Key | Default        | Extra          |+---------------+---------------------+------+-----+----------------+----------------+| log_type      | char(10)            | NO   | MUL | NULL           |                || log_action    | char(10)            | NO   |     | NULL           |                || log_timestamp | char(14)            | NO   | MUL | 19700101000000 |                || log_user      | int unsigned        | NO   | MUL | 0              |                || log_namespace | int                 | NO   | MUL | 0              |                || log_title     | varchar(255) binary | NO   |     | NULL           |                || log_comment   | varchar(255)        | NO   |     | NULL           |                || log_params    | blob                | NO   |     | NULL           |                |+---------------+---------------------+------+-----+----------------+----------------+

DESCRIBElogging;

+---------------+---------------------+------+-----+----------------+----------------+| Field         | Type                | Null | Key | Default        | Extra          |+---------------+---------------------+------+-----+----------------+----------------+| log_type      | char(10)            | NO   | MUL | NULL           |                || log_action    | char(10)            | NO   |     | NULL           |                || log_timestamp | char(14)            | NO   |     | 19700101000000 |                || log_user      | int unsigned        | NO   | MUL | 0              |                || log_namespace | int(11)             | NO   | MUL | 0              |                || log_title     | varchar(255) binary | NO   |     | NULL           |                || log_comment   | varchar(255)        | NO   |     | NULL           |                || log_params    | blob                | NO   |     | NULL           |                |+---------------+---------------------+------+-----+----------------+----------------+

DESCRIBElogging;

+---------------+---------------------+------+-----+----------------+----------------+| Field         | Type                | Null | Key | Default        | Extra          |+---------------+---------------------+------+-----+----------------+----------------+| log_type      | char(10)            | NO   | MUL | NULL           |                || log_action    | char(10)            | NO   |     | NULL           |                || log_timestamp | char(14)            | NO   |     | 19700101000000 |                || log_user      | int unsigned        | NO   | MUL | 0              |                || log_namespace | tinyint(?) unsigned | NO   | MUL | 0              |                || log_title     | varchar(255) binary | NO   |     | NULL           |                || log_comment   | varchar(255)        | NO   |     | NULL           |                || log_params    | blob                | NO   |     | NULL           |                |+---------------+---------------------+------+-----+----------------+----------------+

SHOWINDEXINlogging;

+---------+------------+---------------------+--------------+---------------+-----------+-------------+----------+--------+------+------------+---------+---------------+| Table   | Non_unique | Key_name            | Seq_in_index | Column_name   | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |+---------+------------+---------------------+--------------+---------------+-----------+-------------+----------+--------+------+------------+---------+---------------+| logging |          0 | PRIMARY             |            1 | log_id        | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_type_time       |            1 | log_type      | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_type_time       |            2 | log_timestamp | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_actor_time      |            1 | log_actor     | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_actor_time      |            2 | log_timestamp | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_page_time       |            1 | log_namespace | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_page_time       |            2 | log_title     | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_page_time       |            3 | log_timestamp | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_times           |            1 | log_timestamp | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_actor_type_time |            1 | log_actor     | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_actor_type_time |            2 | log_type      | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_actor_type_time |            3 | log_timestamp | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_page_id_time    |            1 | log_page      | A         |           0 |     NULL | NULL   | YES  | BTREE      |         |               || logging |          1 | log_page_id_time    |            2 | log_timestamp | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_type_action     |            1 | log_type      | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_type_action     |            2 | log_action    | A         |           0 |     NULL | NULL   |      | BTREE      |         |               || logging |          1 | log_type_action     |            3 | log_timestamp | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |+---------+------------+---------------------+--------------+---------------+-----------+-------------+----------+--------+------+------------+---------+---------------+

• Manual:Logging to Special:Log
• Help:Log

• MediaWiki database tables
• Log