Manual:job table

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Manual:Contents MediaWiki database layout job table
MediaWiki version:
1.6

The job table holds a list of pending jobs . Used only when $wgJobTypeConf uses the JobQueueDB class.

FieldsEdit

job_idEdit

Primary key.

job_cmdEdit

Command name, limited to 60 characters to prevent key length overflow. Command names correspond to keys from $wgJobClasses .

job_namespaceEdit

Namespace to act on. Should be 0 if the command does not operate on a title. Used in conjunction with job_title.

job_titleEdit

Title to act on. Should be empty if the command does not operate on a title. Used in conjunction with job_namespace.

job_timestampEdit

MediaWiki version:
1.19

Timestamp of when the job was inserted. NULL for jobs added before addition of the timestamp.

job_paramsEdit

Any other parameters to the command. Stored as a PHP serialized array, or an empty string if there are no parameters.

job_randomEdit

MediaWiki version:
1.21

Random, non-unique, number used for concurrent job acquisition.

job_attemptsEdit

MediaWiki version:
1.21

The number of times this job has been locked.

job_tokenEdit

MediaWiki version:
1.21

Field that conveys process locks on rows via process UUIDs. Unlocked jobs have this field set to an empty string.

job_token_timestampEdit

Timestamp when the job was locked. Unlocked jobs have this field null.

job_sha1Edit

Base 36 SHA1 of the job parameters relevant to detecting duplicates.

Schema summaryEdit

MediaWiki version:
1.36

DESCRIBE job;

+---------------------+------------------+------+-----+---------+----------------+
| Field               | Type             | Null | Key | Default | Extra          |
+---------------------+------------------+------+-----+---------+----------------+
| job_id              | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| job_cmd             | varbinary(60)    | NO   | MUL |         |                |
| job_namespace       | int(11)          | NO   |     | NULL    |                |
| job_title           | varbinary(255)   | NO   |     | NULL    |                |
| job_timestamp       | binary(14)       | YES  | MUL | NULL    |                |
| job_params          | mediumblob       | NO   |     | NULL    |                |
| job_random          | int(10) unsigned | NO   |     | 0       |                |
| job_attempts        | int(10) unsigned | NO   |     | 0       |                |
| job_token           | varbinary(32)    | NO   |     |         |                |
| job_token_timestamp | binary(14)       | YES  |     | NULL    |                |
| job_sha1            | varbinary(32)    | NO   | MUL |         |                |
+---------------------+------------------+------+-----+---------+----------------+
MediaWiki versions:
1.33 – 1.35

DESCRIBE job;

+---------------------+------------------+------+-----+---------+----------------+
| Field               | Type             | Null | Key | Default | Extra          |
+---------------------+------------------+------+-----+---------+----------------+
| job_id              | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| job_cmd             | varbinary(60)    | NO   | MUL |         |                |
| job_namespace       | int(11)          | NO   |     | NULL    |                |
| job_title           | varbinary(255)   | NO   |     | NULL    |                |
| job_timestamp       | varbinary(14)    | YES  | MUL | NULL    |                |
| job_params          | mediumblob       | NO   |     | NULL    |                |
| job_random          | int(10) unsigned | NO   |     | 0       |                |
| job_attempts        | int(10) unsigned | NO   |     | 0       |                |
| job_token           | varbinary(32)    | NO   |     |         |                |
| job_token_timestamp | varbinary(14)    | YES  |     | NULL    |                |
| job_sha1            | varbinary(32)    | NO   | MUL |         |                |
+---------------------+------------------+------+-----+---------+----------------+
MediaWiki versions:
1.21 – 1.32

DESCRIBE job;

+---------------------+------------------+------+-----+---------+----------------+
| Field               | Type             | Null | Key | Default | Extra          |
+---------------------+------------------+------+-----+---------+----------------+
| job_id              | int(10) unsigned | NO   | PRI | NULL    | auto_increment |
| job_cmd             | varbinary(60)    | NO   | MUL |         |                |
| job_namespace       | int(11)          | NO   |     | NULL    |                |
| job_title           | varbinary(255)   | NO   |     | NULL    |                |
| job_timestamp       | varbinary(14)    | YES  | MUL | NULL    |                |
| job_params          | blob             | NO   |     | NULL    |                |
| job_random          | int(10) unsigned | NO   |     | 0       |                |
| job_attempts        | int(10) unsigned | NO   |     | 0       |                |
| job_token           | varbinary(32)    | NO   |     |         |                |
| job_token_timestamp | varbinary(14)    | YES  |     | NULL    |                |
| job_sha1            | varbinary(32)    | NO   | MUL |         |                |
+---------------------+------------------+------+-----+---------+----------------+
MediaWiki versions:
1.19 – 1.20

DESCRIBE job;

+---------------+---------------------+------+-----+---------+----------------+
| Field         | Type                | Null | Key | Default | Extra          |
+---------------+---------------------+------+-----+---------+----------------+
| job_id        | int(10) unsigned    | NO   | PRI | NULL    | AUTO_INCREMENT |
| job_cmd       | varbinary(60)       | NO   | MUL | NULL    |                |
| job_namespace | int(11)             | NO   |     | NULL    |                |
| job_title     | varchar(255) binary | NO   |     | NULL    |                |
| job_timestamp | varbinary(14)       | YES  | MUL | NULL    |                |
| job_params    | blob                | NO   |     | NULL    |                |
+---------------+---------------------+------+-----+---------+----------------+
MediaWiki versions:
1.10 – 1.18

DESCRIBE job;

+---------------+---------------------+------+-----+---------+----------------+
| Field         | Type                | Null | Key | Default | Extra          |
+---------------+---------------------+------+-----+---------+----------------+
| job_id        | int(10) unsigned    | NO   | PRI | NULL    | AUTO_INCREMENT |
| job_cmd       | varbinary(60)       | NO   | MUL | NULL    |                |
| job_namespace | int(11)             | NO   |     | NULL    |                |
| job_title     | varchar(255) binary | NO   |     | NULL    |                |
| job_params    | blob                | NO   |     | NULL    |                |
+---------------+---------------------+------+-----+---------+----------------+
MediaWiki versions:
1.6 – 1.9

DESCRIBE job;

+---------------+---------------------+------+-----+---------+----------------+
| Field         | Type                | Null | Key | Default | Extra          |
+---------------+---------------------+------+-----+---------+----------------+
| job_id        | int(9) unsigned     | NO   | PRI | NULL    | AUTO_INCREMENT |
| job_cmd       | varchar(255)        | NO   | MUL | NULL    |                |
| job_namespace | int(11)             | NO   |     | NULL    |                |
| job_title     | varchar(255) binary | NO   |     | NULL    |                |
| job_params    | blob                | NO   |     | NULL    |                |
+---------------+---------------------+------+-----+---------+----------------+

IndexesEdit

MediaWiki version:
1.21

SHOW INDEX IN job;

+-------+------------+------------------+--------------+---------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| Table | Non_unique | Key_name         | Seq_in_index | Column_name   | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |
+-------+------------+------------------+--------------+---------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| job   |          0 | PRIMARY          |            1 | job_id        | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| job   |          1 | job_sha1         |            1 | job_sha1      | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| job   |          1 | job_cmd_token    |            1 | job_cmd       | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| job   |          1 | job_cmd_token    |            2 | job_token     | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| job   |          1 | job_cmd_token    |            3 | job_random    | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| job   |          1 | job_cmd_token_id |            1 | job_cmd       | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| job   |          1 | job_cmd_token_id |            2 | job_token     | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| job   |          1 | job_cmd_token_id |            3 | job_id        | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| job   |          1 | job_cmd          |            1 | job_cmd       | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| job   |          1 | job_cmd          |            2 | job_namespace | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| job   |          1 | job_cmd          |            3 | job_title     | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| job   |          1 | job_cmd          |            4 | job_params    | A         |           0 |      128 | NULL   |      | BTREE      |         |               |
| job   |          1 | job_timestamp    |            1 | job_timestamp | A         |           0 |     NULL | NULL   | YES  | BTREE      |         |               |
+-------+------------+------------------+--------------+---------------+-----------+-------------+----------+--------+------+------------+---------+---------------+