Manual:Page table/pt-br

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This page is a translated version of the page Manual:Page table and the translation is 4% complete.
Manual:Conteúdos Leiaute do banco de dados do MediaWiki page table
Versão MediaWiki:
1.5

The page table can be considered the "core of the wiki". Each page in a MediaWiki installation has an entry here which identifies it by title and contains some essential metadata. It was first introduced in r6710, in MediaWiki 1.5.

The text of the page itself is stored in the text table. To retrieve the text of an article, MediaWiki first searches for page_title in the page table. Then, page_latest is used to search the revision table for rev_id , and rev_text_id is obtained in the process. The value obtained for rev_text_id is used to search for old_id in the text table to retrieve the text. When a page is deleted, the revisions are moved to the archive table.

If you want to completely delete a page manually from the database, be sure to delete the entry for the page in the page table, and for all the page's revisions in the revision table, and all of the text rows corresponding only to the page in the text table. This can be done by deleting the page row, then running maintenance/deleteOrphanedRevisions.php. See also below how to do.

Fields

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. Os valores variam de 0 a 99 para os principais namespaces, e de 100 a 10.000 para os namespaces personalizados.

page_title

O título da página limpo, sem o namespace, com um máximo de 255 caracteres (binários). 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

Este campo armazena se a página é nova, significando que ou ela tem apenas uma revisão ou não foi editada desde que foi restaurada, mesmo que exista mais de uma revisão. 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

Versão 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

Versão MediaWiki:
1.21

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

page_lang

Versão MediaWiki:
1.24

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

page_restrictions

Versão 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").

Versões do 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. (removido na 1.39)

page_counter

Versão 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 Manual:$wgDisableCounters for details.


Schema summary

Versão 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    |                |
+--------------------+---------------------+------+-----+---------+----------------+
Versão 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           |                |
+--------------------+---------------------+------+-----+----------------+----------------+
Versões do 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           |                |
+--------------------+---------------------+------+-----+----------------+----------------+
Versão 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    |                |
+--------------------+---------------------+------+-----+---------+----------------+
Versão 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    |                |
+--------------------+---------------------+------+-----+---------+----------------+
Versões do 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    |                |
+--------------------+---------------------+------+-----+---------+----------------+
Versões do 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    |                |
+-------------------+---------------------+------+-----+---------+----------------+
Versões do 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    |                |
+-------------------+---------------------+------+-----+---------+----------------+
Versões do 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

Versão 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.

See also