Manual:Page table/ru

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Manual:Содержание MediaWiki database layout page таблица
Версия MediaWiki:
1.5

Таблицу page можно считать "ядром вики". Каждая страница в установленной MediaWiki имеет здесь запись, которая идентифицирует ее по заголовку и содержит некоторые важные метаданные. Впервые она был представлена в r6710, в MediaWiki 1.5.

Текст самой страницы хранится в таблице text . Чтобы получить текст статьи, MediaWiki сначала ищет page_title в таблице страниц. Затем page_latest используется для поиска rev_id в таблице revision , и в процессе получается rev_text_id . Значение, полученное для rev_text_id , используется для поиска old_id в текстовой таблице для извлечения текста. При удалении страницы ревизии перемещаются в таблицу archive .

Если вы хотите полностью удалить страницу вручную из базы данных, обязательно удалите запись для страницы в таблице страниц, и для всех ревизий страницы в таблице ревизий и все текстовые строки, соответствующий только странице в текстовой таблице. Это можно сделать, удалив строку страницы, а затем запустив Maintenance/deleteOrphanedRevisions.php. См. также ниже, как это сделать.

Поля

page_id

Uniquely identifying primary key. This value is preserved across edits and renames.

Page IDs do not change when pages are moved, but they may change when pages are deleted and then restored. As of MediaWiki 1.27, the historical page ID persists in the archive table, and restored pages attempt to reclaim their old page ID.

For further information, see:

page_namespace

A page name is broken into a namespace and a title. The namespace keys are UI-language-independent constants, defined in includes/Defines.php.

This field contains the number of the page's namespace. The values range from 0 to 99 for the core namespaces, and from 100 to 10,000 for custom namespaces.

page_title

The sanitized page title, without the namespace, with a maximum of 255 characters (binary). It is stored as text, with spaces replaced by underscores. The real title shown in articles is just this title with underscores (_) converted to spaces ( ). For example, a page titled "Talk:Foo Bar" would have "Foo_Bar" in this field.

page_is_redirect

A value of 1 here indicates the article is a redirect; it is 0 in all other cases.

page_is_new

This field stores whether the page is new, meaning it either has only one revision or has not been edited since being restored, even if there is more than one revision. If the field contains a value of 1, then it indicates that the page is new; otherwise, it is 0. Rollback links are not displayed if the page is new, since there is nothing to roll back to.

page_random

Random decimal value, between 0 and 1, used for Special:Random (see Manual:Random page for more details). Generated by wfRandom() .

Around 2005, a bug caused these random values to be non-uniform. Since the field is set at page creation, wikis that have existed for a long time might still have some of these erroneous values. See T208909.

page_touched

This timestamp is updated whenever the page changes in a way requiring it to be re-rendered, invalidating caches. Aside from editing, this includes permission changes, creation or deletion of linked pages, and alteration of contained templates. Set to $dbw->timestamp() at the time of page creation.

page_links_updated

Версия MediaWiki:
1.23

This timestamp is updated whenever a page is re-parsed and it has all the link tracking tables updated for it. This is useful for de-duplicating expensive backlink update jobs. Set to the default value of NULL when the page is created by WikiPage::insertOn() .

page_latest

This is a foreign key to rev_id for the current revision. It may be 0 during page creation. It needs to link to a revision with a valid revision.rev_page, or there will be the "The revision #0 of the page named 'Foo' does not exist" error when one tries to view the page. Can be obtained via WikiPage::getLatest().

page_len

Uncompressed length in bytes of the page's current source text.

This however, does not apply to images which still have records in this table. Instead, the uncompressed length in bytes of the description for the file is used as the latter is in the text.old_text field.

The Wikipage class in includes/WikiPage.php has two methods, viz. insertOn() and updateRevisionOn() that are responsible for populating these details.

page_content_model

Версия MediaWiki:
1.21

Content model, see CONTENT_MODEL_XXX constants. Comparable to revision.rev_content_model.

page_lang

Версия MediaWiki:
1.24

Page content language. Set to the default value of NULL at the time of page creation.

page_restrictions

Версия MediaWiki:
1.9

Comma-separated set of permission keys indicating who can move or edit the page. Edit and move sections are separated by a colon (e.g., "edit=autoconfirmed,sysop:move=sysop").

Версии MediaWiki:
1.10 – 1.38
Beginning with MediaWiki 1.10, page protection controls were moved to the page_restrictions table, so this field will be empty in databases generated by more current versions of MediaWiki. (удалено в 1.39)

page_counter

Версия MediaWiki:
1.24

Number of times the page has been viewed. This feature was completely removed in MediaWiki 1.25, following a request for comment. Even before that, many sites including Wikimedia projects disabled it to increase performance; see Руководство:$wgDisableCounters for details.


Schema summary

Версия MediaWiki:
1.36
Gerrit change 690067

DESCRIBE page;

+--------------------+---------------------+------+-----+---------+----------------+
| Field              | Type                | Null | Key | Default | Extra          |
+--------------------+---------------------+------+-----+---------+----------------+
| page_id            | int(10) unsigned    | NO   | PRI | NULL    | auto_increment |
| page_namespace     | int(11)             | NO   | MUL | NULL    |                |
| page_title         | varbinary(255)      | NO   |     | NULL    |                |
| page_restrictions  | tinyblob            | YES  |     | NULL    |                |
| page_is_redirect   | tinyint(3) unsigned | NO   | MUL | 0       |                |
| page_is_new        | tinyint(3) unsigned | NO   |     | 0       |                |
| page_random        | double unsigned     | NO   | MUL | NULL    |                |
| page_touched       | binary(14)          | NO   |     | NULL    |                |
| page_links_updated | varbinary(14)       | YES  |     | NULL    |                |
| page_latest        | int(10) unsigned    | NO   |     | NULL    |                |
| page_len           | int(10) unsigned    | NO   | MUL | NULL    |                |
| page_content_model | varbinary(32)       | YES  |     | NULL    |                |
| page_lang          | varbinary(35)       | YES  |     | NULL    |                |
+--------------------+---------------------+------+-----+---------+----------------+
Версия MediaWiki:
1.35
Gerrit change 581141

DESCRIBE page;

+--------------------+---------------------+------+-----+----------------+----------------+
| Field              | Type                | Null | Key | Default        | Extra          |
+--------------------+---------------------+------+-----+----------------+----------------+
| page_id            | int(10) unsigned    | NO   | PRI | NULL           | auto_increment |
| page_namespace     | int(11)             | NO   | MUL | NULL           |                |
| page_title         | varbinary(255)      | NO   |     | NULL           |                |
| page_restrictions  | tinyblob            | YES  |     | NULL           |                |
| page_is_redirect   | tinyint(3) unsigned | NO   | MUL | 0              |                |
| page_is_new        | tinyint(3) unsigned | NO   |     | 0              |                |
| page_random        | double unsigned     | NO   | MUL | NULL           |                |
| page_touched       | binary(14)          | NO   |     |                |                |
| page_links_updated | varbinary(14)       | YES  |     | NULL           |                |
| page_latest        | int(10) unsigned    | NO   |     | NULL           |                |
| page_len           | int(10) unsigned    | NO   | MUL | NULL           |                |
| page_content_model | varbinary(32)       | YES  |     | NULL           |                |
| page_lang          | varbinary(35)       | YES  |     | NULL           |                |
+--------------------+---------------------+------+-----+----------------+----------------+
Версии MediaWiki:
1.25 – 1.34
Gerrit change 167655

DESCRIBE page;

+--------------------+---------------------+------+-----+----------------+----------------+
| Field              | Type                | Null | Key | Default        | Extra          |
+--------------------+---------------------+------+-----+----------------+----------------+
| page_id            | int(10) unsigned    | NO   | PRI | NULL           | auto_increment |
| page_namespace     | int(11)             | NO   | MUL | NULL           |                |
| page_title         | varbinary(255)      | NO   |     | NULL           |                |
| page_restrictions  | tinyblob            | NO   |     | NULL           |                |
| page_is_redirect   | tinyint(3) unsigned | NO   | MUL | 0              |                |
| page_is_new        | tinyint(3) unsigned | NO   |     | 0              |                |
| page_random        | double unsigned     | NO   | MUL | NULL           |                |
| page_touched       | binary(14)          | NO   |     |                |                |
| page_links_updated | varbinary(14)       | YES  |     | NULL           |                |
| page_latest        | int(10) unsigned    | NO   |     | NULL           |                |
| page_len           | int(10) unsigned    | NO   | MUL | NULL           |                |
| page_content_model | varbinary(32)       | YES  |     | NULL           |                |
| page_lang          | varbinary(35)       | YES  |     | NULL           |                |
+--------------------+---------------------+------+-----+----------------+----------------+
Версия MediaWiki:
1.24
Gerrit change 135312

DESCRIBE page;

+--------------------+---------------------+------+-----+---------+----------------+
| Field              | Type                | Null | Key | Default | Extra          |
+--------------------+---------------------+------+-----+---------+----------------+
| page_id            | int(10) unsigned    | NO   | PRI | NULL    | AUTO_INCREMENT |
| page_namespace     | int(11)             | NO   | MUL | NULL    |                |
| page_title         | varchar(255) binary | NO   |     | NULL    |                |
| page_restrictions  | tinyblob            | NO   |     | NULL    |                |
| page_counter       | bigint(20) unsigned | NO   |     | 0       |                |
| page_is_redirect   | tinyint(3) unsigned | NO   | MUL | 0       |                |
| page_is_new        | tinyint(3) unsigned | NO   |     | 0       |                |
| page_random        | real unsigned       | NO   | MUL | NULL    |                |
| page_touched       | binary(14)          | NO   |     | NULL    |                |
| page_links_updated | varbinary(14)       | YES  |     | NULL    |                |
| page_latest        | int(10) unsigned    | NO   |     | NULL    |                |
| page_len           | int(10) unsigned    | NO   | MUL | NULL    |                |
| page_content_model | varbinary(32)       | YES  |     | NULL    |                |
| page_lang          | varbinary(35)       | YES  |     | NULL    |                |
+--------------------+---------------------+------+-----+---------+----------------+
Версия MediaWiki:
1.23
Gerrit change 101170

DESCRIBE page;

+--------------------+---------------------+------+-----+---------+----------------+
| Field              | Type                | Null | Key | Default | Extra          |
+--------------------+---------------------+------+-----+---------+----------------+
| page_id            | int(10) unsigned    | NO   | PRI | NULL    | AUTO_INCREMENT |
| page_namespace     | int(11)             | NO   | MUL | NULL    |                |
| page_title         | varchar(255) binary | NO   |     | NULL    |                |
| page_restrictions  | tinyblob            | NO   |     | NULL    |                |
| page_counter       | bigint(20) unsigned | NO   |     | 0       |                |
| page_is_redirect   | tinyint(3) unsigned | NO   | MUL | 0       |                |
| page_is_new        | tinyint(3) unsigned | NO   |     | 0       |                |
| page_random        | real unsigned       | NO   | MUL | NULL    |                |
| page_touched       | binary(14)          | NO   |     | NULL    |                |
| page_links_updated | varbinary(14)       | YES  |     | NULL    |                |
| page_latest        | int(10) unsigned    | NO   |     | NULL    |                |
| page_len           | int(10) unsigned    | NO   | MUL | NULL    |                |
| page_content_model | varbinary(32)       | YES  |     | NULL    |                |
+--------------------+---------------------+------+-----+---------+----------------+
Версии MediaWiki:
1.21 – 1.22

DESCRIBE page;

+--------------------+---------------------+------+-----+---------+----------------+
| Field              | Type                | Null | Key | Default | Extra          |
+--------------------+---------------------+------+-----+---------+----------------+
| page_id            | int(10) unsigned    | NO   | PRI | NULL    | AUTO_INCREMENT |
| page_namespace     | int(11)             | NO   | MUL | NULL    |                |
| page_title         | varchar(255) binary | NO   |     | NULL    |                |
| page_restrictions  | tinyblob            | NO   |     | NULL    |                |
| page_counter       | bigint(20) unsigned | NO   |     | 0       |                |
| page_is_redirect   | tinyint(3) unsigned | NO   | MUL | 0       |                |
| page_is_new        | tinyint(3) unsigned | NO   |     | 0       |                |
| page_random        | real unsigned       | NO   | MUL | NULL    |                |
| page_touched       | binary(14)          | NO   |     | NULL    |                |
| page_latest        | int(10) unsigned    | NO   |     | NULL    |                |
| page_len           | int(10) unsigned    | NO   | MUL | NULL    |                |
| page_content_model | varbinary(32)       | YES  |     | NULL    |                |
+--------------------+---------------------+------+-----+---------+----------------+
Версии MediaWiki:
1.19 – 1.20

DESCRIBE page;

+-------------------+---------------------+------+-----+---------+----------------+
| Field             | Type                | Null | Key | Default | Extra          |
+-------------------+---------------------+------+-----+---------+----------------+
| page_id           | int(10) unsigned    | NO   | PRI | NULL    | AUTO_INCREMENT |
| page_namespace    | int(11)             | NO   | MUL | NULL    |                |
| page_title        | varchar(255) binary | NO   |     | NULL    |                |
| page_restrictions | tinyblob            | NO   |     | NULL    |                |
| page_counter      | bigint(20) unsigned | NO   |     | 0       |                |
| page_is_redirect  | tinyint(3) unsigned | NO   | MUL | 0       |                |
| page_is_new       | tinyint(3) unsigned | NO   |     | 0       |                |
| page_random       | real unsigned       | NO   | MUL | NULL    |                |
| page_touched      | binary(14)          | NO   |     | NULL    |                |
| page_latest       | int(10) unsigned    | NO   |     | NULL    |                |
| page_len          | int(10) unsigned    | NO   | MUL | NULL    |                |
+-------------------+---------------------+------+-----+---------+----------------+
Версии MediaWiki:
1.10 – 1.18

DESCRIBE page;

+-------------------+---------------------+------+-----+---------+----------------+
| Field             | Type                | Null | Key | Default | Extra          |
+-------------------+---------------------+------+-----+---------+----------------+
| page_id           | int(10) unsigned    | NO   | PRI | NULL    | AUTO_INCREMENT |
| page_namespace    | int(11)             | NO   | MUL | NULL    |                |
| page_title        | varchar(255) binary | NO   |     | NULL    |                |
| page_restrictions | tinyblob            | NO   |     | NULL    |                |
| page_counter      | bigint(20) unsigned | NO   |     | 0       |                |
| page_is_redirect  | tinyint(3) unsigned | NO   |     | 0       |                |
| page_is_new       | tinyint(3) unsigned | NO   |     | 0       |                |
| page_random       | real unsigned       | NO   | MUL | NULL    |                |
| page_touched      | binary(14)          | NO   |     | NULL    |                |
| page_latest       | int(10) unsigned    | NO   |     | NULL    |                |
| page_len          | int(10) unsigned    | NO   | MUL | NULL    |                |
+-------------------+---------------------+------+-----+---------+----------------+
Версии MediaWiki:
1.5 – 1.9

DESCRIBE page;

+-------------------+---------------------+------+-----+---------+----------------+
| Field             | Type                | Null | Key | Default | Extra          |
+-------------------+---------------------+------+-----+---------+----------------+
| page_id           | int(8) unsigned     | NO   | PRI | NULL    | AUTO_INCREMENT |
| page_namespace    | int(11)             | NO   | MUL | NULL    |                |
| page_title        | varchar(255) binary | NO   |     | NULL    |                |
| page_restrictions | tinyblob            | NO   |     | NULL    |                |
| page_counter      | bigint(20) unsigned | NO   |     | 0       |                |
| page_is_redirect  | tinyint(1) unsigned | NO   |     | 0       |                |
| page_is_new       | tinyint(1) unsigned | NO   |     | 0       |                |
| page_random       | real unsigned       | NO   | MUL | NULL    |                |
| page_touched      | char(14) binary     | NO   |     | NULL    |                |
| page_latest       | int(8) unsigned     | NO   |     | NULL    |                |
| page_len          | int(8) unsigned     | NO   | MUL | NULL    |                |
+-------------------+---------------------+------+-----+---------+----------------+

Indexes

Версия MediaWiki:
1.28

SHOW INDEX IN page;

+-------+------------+-----------------------------+--------------+------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| Table | Non_unique | Key_name                    | Seq_in_index | Column_name      | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |
+-------+------------+-----------------------------+--------------+------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| page  |          0 | PRIMARY                     |            1 | page_id          | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| page  |          0 | page_name_title             |            1 | page_namespace   | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| page  |          0 | page_name_title             |            2 | page_title       | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| page  |          1 | page_random                 |            1 | page_random      | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| page  |          1 | page_len                    |            1 | page_len         | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| page  |          1 | page_redirect_namespace_len |            1 | page_is_redirect | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| page  |          1 | page_redirect_namespace_len |            2 | page_namespace   | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| page  |          1 | page_redirect_namespace_len |            3 | page_len         | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
+-------+------------+-----------------------------+--------------+------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+

Sample MySQL code

Listing pages and relations with other essential tables

The following code will select the most recent versions of all articles assuming that compression or external storage is not in use:

SELECT page_id, page_namespace, page_title, page_latest "rev_id", old_text "text"
   FROM page
   INNER JOIN slots on page_latest = slot_revision_id
   INNER JOIN slot_roles on slot_role_id = role_id and role_name = 'main'
   INNER JOIN content on slot_content_id = content_id inner join text on substring( content_address, 4 ) = old_id and left( content_address, 3 ) = "tt:" and old_flags = "utf-8";

Other important considerations:

  • to find pages in namespace 0 add p.page_namespace = 0
  • to find pages that are not redirects add p.page_is_redirect = 0

These additional statements can be added either as conditions to a Where statement or as conditions on the appropriate INNER JOIN statement.

См. также