Manual:Revision table/de

Die revision-Tabelle enthält Metadaten für jede Bearbeitung, die an einer Seite innerhalb des Wikis vorgenommen wurde. Jede Bearbeitung einer Seite erzeugt eine Revisionszeile, die Informationen wie den Benutzer, der die Bearbeitung vorgenommen hat, die Zeit, zu der die Bearbeitung erfolgte, und einen Verweis auf den neuen Wikitext in der -Tabelle enthält.

Note that a row is partly about the edit operation and partly about the result of that operation, the new wikitext. It does not give a direct reference to the old wikitext.

Import of the last revision of a page from another wiki produces two entries in the revision table, one with the date and wikitext of the imported revision, and one with the import date. The wikitext of the latter, which becomes that of the current page, is, if a page with the same name already existed, that of the more recent of the two pages.

The revision table is very similar to the table. The revision table is used for page history and listings. The table is used for, , , and, in the case of page creation, for the.

Differences include:


 * The recentchanges table also records logged events such as page moves and deletions
 * Items in the recentchanges table are periodically purged; those in the revision table are retained permanently, unless the page is deleted or the site owner runs the maintenance script.
 * as said, import of a page revision not only adds an entry to the revision table with the import date, but also one with the original date.

Deleted revisions are moved to the table.

The revision table and the text table were introduced in to supersede the  table.

rev_id
Dieses Feld enthält den Primärschlüssel für jede Revision. is a foreign key to this field. The rev_id numbers have been preserved across deletion/undeletion since the table's inception in MediaWiki 1.5, when rev_id and text_id superseded the old cur_id.

Note that while rev_id almost always increases monotonically for successive revisions of a page, this is not strictly guaranteed as importing from another wiki can cause revisions to be created out of order.

rev_page
This field holds a reference to the to which this revision pertains. The number in this field is equal to the field of said page. This should never be invalid; if it is, that revision won't show up in the page history. If links to a revision with an invalid rev_page, this will cause the "The revision #0 of the page named 'Foo' does not exist" error. (similar issue might occur when slots and content are missing for the revision)

rev_text_id
This is a foreign key to in the  table. (The text table is where the actual bulk text is stored.) It's possible for multiple revisions to use the same text - for instance, revisions where only metadata is altered, or where a is done to a previous version.

If rows in the table with  = rev_id exist, this field should be ignored (and may be 0) in favor of the corresponding data from the slots and content tables.

This column was replaced by.

rev_comment
This field holds an editor's edit summary (editor's comment on revision). This text is shown in the history and contributions. ( The table contains a copy used for, , , and, in the case of page creation, for the . ) It is rendered in a sanitized subset of wiki markup.

of the revision_comment_temp table and the table should be used instead!

This column was replaced by, which references.

rev_comment_id
This is a foreign key to in the  table.

If this field contains zero in each record, the comment id must be retrieved from the table. Supposedly, this table will be merged with the table revision again in the future.

rev_user
This is equal to the of the user who made this edit. The value for this field is 0 for anonymous edits, initializations scripts, and for some mass imports.

Note, there are bugs: T112384.

While actor migration is being done, and depending on the configuration setting, this field may be empty and the actor performing the edit can be stored in the rev_actor field or the table instead.

This column was removed along with. This column is replaced by, which references.

rev_user_text
This field holds the text of the editor's, or the IP address of the editor if the revision was done by an unregistered user.

In anonymous revisions imported from UseModWiki or early incarnations of the Phase II software, this field may contain an IP address with the final octet obscured (i.e.  such as 24.150.61.xxx; see bug 3631). Some edits imported from UseModWiki may contain a Reverse DNS lookup hostname like  or.

While actor migration is being done, and depending on the configuration setting, this field may be empty and the actor performing the edit can be stored in the rev_actor field or the table instead.

This column was removed along with. This column is replaced by, which references.

rev_actor
This is a foreign key to in the  table. If this field contains zero in each record, the actor id must be retrieved from the table. Supposedly, this table will be merged with the table revision again in the future. Siehe.

rev_timestamp
Holds the of the edit. Looks like, for example,  (MW_TS time format). Corresponds to (and  for page creations).

Unlike, this value is not fudged to be unique for a given page, so edits happening in quick succession can have the same timestamp.

rev_minor_edit
Records whether the user marked the 'minor edit' checkbox. If the value for this field is 1, then the edit was declared as 'minor'; it is 0 otherwise. Many automated edits are marked as minor.

rev_deleted
Dieses Feld ist für das -System reserviert. Es ist ein Bitfeld, in dem die Werte DELETED_TEXT = 1, DELETED_COMMENT = 2, DELETED_USER = 4 und DELETED_RESTRICTED = 8 sind. So, for example, if nothing has been deleted from that revision, then the value is 0; if both the comment and user have been deleted, then the value is 6.

rev_len
This field contains the length of the article after the revision, in bytes. Wird in der Seitenhistorie verwendet. Die ID entspricht.

rev_parent_id
Die rev_id der vorherigen Revision einer Seite. Dies entspricht. Bei Bearbeitungen an einer neuen Seite ist rev_parent_id = 0.

Verwendung
Dieses Feld wird verwendet, um eine Baumstruktur zu unterstützen. Dieses Feld wird beispielsweise verwendet, um den Unterschied in der Größe zwischen einer bestimmten Revision und der vorherigen Revision in einer Ansicht der Seitenhistorie zu berechnen. If a parent ID points to a revision that's associated with a different page, MediaWiki will still use that parent revision as a basis of comparison for purposes of calculating size difference. If a revision is deleted from the database, and another revision's parent ID still points to it, then MediaWiki will behave the same as if there were no parent revision; i.e. it will assume the previous size was 0.



Übertragene Revisionen
Wenn Revisionen von einem anderen Wiki importiert werden, wird die übergeordnete ID-Baumstruktur der übertragenen Revisionen aus dem Quell-Wiki beibehalten (dies wird von jeder Revision, mit Ausnahme der Schlussrevision, durch ein XML-Element implementiert, das zum Auffüllen von rev_parent_id verwendet wird), und die übergeordneten IDs der Revisionen des Ziel-Wikis werden nicht aktualisiert. Ebenso werden beim Zusammenführen von Seitenhistorien die Eltern-IDs der Revisionen von Quell- und Zielseite nicht aktualisiert. can be used to populate rev_parent_id based on revision timestamps and revision IDs. In the case of an edit conflict, the revision ID of the edit that is saved first (causing the conflict) will be used as the parent ID of the edit that is saved second (after resolving the conflict).

rev_sha1
This field is used to add the SHA-1 text content hash in base-36 (generated by .) Since 1.32, it's a nested hash of hashes of across all slots of the revision. If the revision only has one slot, the values of the rev_sha1 and content_sha1 fields are identical. The nested hash algorithm is implemented in. It can be outlined as:

rev_sha1 = hash_n; hash_n = sha1( hash_n-1, content_sha1_n ); hash_1 = content_sha1_1;

rev_content_model
Content model, see CONTENT_MODEL_XXX constants in. These IDs will be exposed in the API and XML dumps. Extensions that define their own content model IDs should take care to avoid conflicts. Using the extension name as a prefix is recommended, for example 'myextension-somecontent'. Mögliche Werte sind z.B.: 'wikitext', 'javascript', 'css', 'text', and 'json'

If rows in the slots table with slot_revision_id = rev_id this field should be ignored (and may be NULL) in favor of the corresponding data from the slots and content tables.

This column was replaced by, which references.

rev_content_format
Content format, see CONTENT_FORMAT_XXX constants in. These should be MIME types, and will be exposed in the API and XML dumps. Extensions are free to use the below formats, or define their own. It is recommended to stick with the conventions for MIME types. Mögliche Werte sind z.B.: 'text/x-wiki', 'text/javascript', 'text/css', 'text/plain', 'text/html', 'application/vnd.php.serialized', 'application/json', 'application/xml'

If rows in the slots table with slot_revision_id = rev_id exist, this field should be ignored (and may be NULL).

This column was removed. The ContentHandler class is able to automatically detect the content format, and replaces this column.



Schematische Übersicht
++-+--+-+-++ ++-+--+-+-++ ++-+--+-+-++
 * Field         | Type                | Null | Key | Default | Extra          |
 * rev_id        | int(10) unsigned    | NO   | PRI | NULL    | auto_increment |
 * rev_page      | int(10) unsigned    | NO   | MUL | NULL    |                |
 * rev_comment_id | bigint(20) unsigned | NO  |     | 0       |                |
 * rev_actor     | bigint(20) unsigned | NO   | MUL | 0       |                |
 * rev_timestamp | binary(14)          | NO   | MUL | NULL    |                |
 * rev_minor_edit | tinyint(3) unsigned | NO  |     | 0       |                |
 * rev_deleted   | tinyint(3) unsigned | NO   |     | 0       |                |
 * rev_len       | int(10) unsigned    | YES  |     | NULL    |                |
 * rev_parent_id | int(10) unsigned    | YES  |     | NULL    |                |
 * rev_sha1      | varbinary(32)       | NO   |     |         |                |

++-+--+-+++ ++-+--+-+++ ++-+--+-+++
 * Field         | Type                | Null | Key | Default        | Extra          |
 * rev_id        | int(10) unsigned    | NO   | PRI | NULL           | auto_increment |
 * rev_page      | int(10) unsigned    | NO   | MUL | NULL           |                |
 * rev_comment_id | bigint(20) unsigned | NO  |     | 0              |                |
 * rev_actor     | bigint(20) unsigned | NO   | MUL | 0              |                |
 * rev_timestamp | binary(14)          | NO   | MUL |                |                |
 * rev_minor_edit | tinyint(3) unsigned | NO  |     | 0              |                |
 * rev_deleted   | tinyint(3) unsigned | NO   |     | 0              |                |
 * rev_len       | int(10) unsigned    | YES  |     | NULL           |                |
 * rev_parent_id | int(10) unsigned    | YES  |     | NULL           |                |
 * rev_sha1      | varbinary(32)       | NO   |     |                |                |

++-+--+-+++ ++-+--+-+++ ++-+--+-+++
 * Field             | Type                | Null | Key | Default        | Extra          |
 * rev_id            | int(10) unsigned    | NO   | PRI | NULL           | auto_increment |
 * rev_page          | int(10) unsigned    | NO   | MUL | NULL           |                |
 * rev_text_id       | int(10) unsigned    | NO   |     | 0              |                |
 * rev_comment       | varbinary(767)      | NO   |     |                |                |
 * rev_user          | int(10) unsigned    | NO   | MUL | 0              |                |
 * rev_user_text     | varbinary(255)      | NO   | MUL |                |                |
 * rev_timestamp     | binary(14)          | NO   | MUL |                |                |
 * rev_minor_edit    | tinyint(3) unsigned | NO   |     | 0              |                |
 * rev_deleted       | tinyint(3) unsigned | NO   |     | 0              |                |
 * rev_len           | int(10) unsigned    | YES  |     | NULL           |                |
 * rev_parent_id     | int(10) unsigned    | YES  |     | NULL           |                |
 * rev_sha1          | varbinary(32)       | NO   |     |                |                |
 * rev_content_model | varbinary(32)       | YES  |     | NULL           |                |
 * rev_content_format | varbinary(64)      | YES  |     | NULL           |                |

++-+--+-+++ ++-+--+-+++ ++-+--+-+++
 * Field             | Type                | Null | Key | Default        | Extra          |
 * rev_id            | int(10) unsigned    | NO   | PRI | NULL           | auto_increment |
 * rev_page          | int(10) unsigned    | NO   | MUL | NULL           |                |
 * rev_text_id       | int(10) unsigned    | NO   |     | NULL           |                |
 * rev_comment       | varbinary(767)      | NO   |     |                |                |
 * rev_user          | int(10) unsigned    | NO   | MUL | 0              |                |
 * rev_user_text     | varbinary(255)      | NO   | MUL |                |                |
 * rev_timestamp     | binary(14)          | NO   | MUL |                |                |
 * rev_minor_edit    | tinyint(3) unsigned | NO   |     | 0              |                |
 * rev_deleted       | tinyint(3) unsigned | NO   |     | 0              |                |
 * rev_len           | int(10) unsigned    | YES  |     | NULL           |                |
 * rev_parent_id     | int(10) unsigned    | YES  |     | NULL           |                |
 * rev_sha1          | varbinary(32)       | NO   |     |                |                |
 * rev_content_model | varbinary(32)       | YES  |     | NULL           |                |
 * rev_content_format | varbinary(64)      | YES  |     | NULL           |                |

++-+--+-+++ ++-+--+-+++ ++-+--+-+++
 * Field             | Type                | Null | Key | Default        | Extra          |
 * rev_id            | int(10) unsigned    | NO   | PRI | NULL           | auto_increment |
 * rev_page          | int(10) unsigned    | NO   | MUL | NULL           |                |
 * rev_text_id       | int(10) unsigned    | NO   |     | NULL           |                |
 * rev_comment       | varbinary(767)      | NO   |     | NULL           |                |
 * rev_user          | int(10) unsigned    | NO   | MUL | 0              |                |
 * rev_user_text     | varbinary(255)      | NO   | MUL |                |                |
 * rev_timestamp     | binary(14)          | NO   | MUL |                |                |
 * rev_minor_edit    | tinyint(3) unsigned | NO   |     | 0              |                |
 * rev_deleted       | tinyint(3) unsigned | NO   |     | 0              |                |
 * rev_len           | int(10) unsigned    | YES  |     | NULL           |                |
 * rev_parent_id     | int(10) unsigned    | YES  |     | NULL           |                |
 * rev_sha1          | varbinary(32)       | NO   |     |                |                |
 * rev_content_model | varbinary(32)       | YES  |     | NULL           |                |
 * rev_content_format | varbinary(64)      | YES  |     | NULL           |                |

++-+--+-+-++ ++-+--+-+-++ ++-+--+-+-++
 * Field             | Type                | Null | Key | Default | Extra          |
 * rev_id            | int(10) unsigned    | NO   | PRI | NULL    | AUTO_INCREMENT |
 * rev_page          | int(10) unsigned    | NO   | PRI | NULL    |                |
 * rev_text_id       | int(10) unsigned    | NO   |     | NULL    |                |
 * rev_comment       | tinyblob            | NO   |     | NULL    |                |
 * rev_user          | int(10) unsigned    | NO   | MUL | 0       |                |
 * rev_user_text     | varchar(255) binary | NO   | MUL | NULL    |                |
 * rev_timestamp     | binary(14)          | NO   | MUL | NULL    |                |
 * rev_minor_edit    | tinyint(3) unsigned | NO   |     | 0       |                |
 * rev_deleted       | tinyint(3) unsigned | NO   |     | 0       |                |
 * rev_len           | int(10) unsigned    | YES  |     | NULL    |                |
 * rev_parent_id     | int(10) unsigned    | YES  |     | NULL    |                |
 * rev_sha1          | varbinary(32)       | NO   |     | NULL    |                |
 * rev_content_model | varbinary(32)       | YES  |     | NULL    |                |
 * rev_content_format | varbinary(64)      | YES  |     | NULL    |                |

++-+--+-+-++ ++-+--+-+-++ ++-+--+-+-++
 * Field         | Type                | Null | Key | Default | Extra          |
 * rev_id        | int(10) unsigned    | NO   | PRI | NULL    | AUTO_INCREMENT |
 * rev_page      | int(10) unsigned    | NO   | PRI | NULL    |                |
 * rev_text_id   | int(10) unsigned    | NO   |     | NULL    |                |
 * rev_comment   | tinyblob            | NO   |     | NULL    |                |
 * rev_user      | int(10) unsigned    | NO   | MUL | 0       |                |
 * rev_user_text | varchar(255) binary | NO   | MUL | NULL    |                |
 * rev_timestamp | binary(14)          | NO   | MUL | NULL    |                |
 * rev_minor_edit | tinyint(3) unsigned | NO  |     | 0       |                |
 * rev_deleted   | tinyint(3) unsigned | NO   |     | 0       |                |
 * rev_len       | int(10) unsigned    | YES  |     | NULL    |                |
 * rev_parent_id | int(10) unsigned    | YES  |     | NULL    |                |
 * rev_sha1      | varbinary(32)       | NO   |     | NULL    |                |

++-+--+-+-++ ++-+--+-+-++ ++-+--+-+-++
 * Field         | Type                | Null | Key | Default | Extra          |
 * rev_id        | int(10) unsigned    | NO   | PRI | NULL    | AUTO_INCREMENT |
 * rev_page      | int(10) unsigned    | NO   | PRI | NULL    |                |
 * rev_text_id   | int(10) unsigned    | NO   |     | NULL    |                |
 * rev_comment   | tinyblob            | NO   |     | NULL    |                |
 * rev_user      | int(10) unsigned    | NO   | MUL | 0       |                |
 * rev_user_text | varchar(255) binary | NO   | MUL | NULL    |                |
 * rev_timestamp | binary(14)          | NO   | MUL | NULL    |                |
 * rev_minor_edit | tinyint(3) unsigned | NO  |     | 0       |                |
 * rev_deleted   | tinyint(3) unsigned | NO   |     | 0       |                |
 * rev_len       | int(10) unsigned    | YES  |     | NULL    |                |
 * rev_parent_id | int(10) unsigned    | YES  |     | NULL    |                |

++-+--+-+-++ ++-+--+-+-++ ++-+--+-+-++
 * Field         | Type                | Null | Key | Default | Extra          |
 * rev_id        | int(8) unsigned     | NO   | PRI | NULL    | AUTO_INCREMENT |
 * rev_page      | int(8) unsigned     | NO   | PRI | NULL    |                |
 * rev_text_id   | int(8) unsigned     | NO   |     | NULL    |                |
 * rev_comment   | tinyblob            | NO   |     | NULL    |                |
 * rev_user      | int(5) unsigned     | NO   | MUL | 0       |                |
 * rev_user_text | varchar(255) binary | NO   | MUL | NULL    |                |
 * rev_timestamp | char(14) binary     | NO   | MUL | NULL    |                |
 * rev_minor_edit | tinyint(1) unsigned | NO  |     | 0       |                |
 * rev_deleted   | tinyint(1) unsigned | NO   |     | 0       |                |

Indexe
 +--++--+--+---+---+-+--++--++-+---+ +--++--+--+---+---+-+--++--++-+---+ +--++--+--+---+---+-+--++--++-+---+
 * Table   | Non_unique | Key_name                 | Seq_in_index | Column_name   | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |
 * revision |         0 | PRIMARY                  |            1 | rev_id        | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * revision |         1 | rev_timestamp            |            1 | rev_timestamp | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * revision |         1 | rev_page_timestamp       |            1 | rev_page      | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * revision |         1 | rev_page_timestamp       |            2 | rev_timestamp | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * revision |         1 | rev_actor_timestamp      |            1 | rev_actor     | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * revision |         1 | rev_actor_timestamp      |            2 | rev_timestamp | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * revision |         1 | rev_actor_timestamp      |            3 | rev_id        | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * revision |         1 | rev_page_actor_timestamp |            1 | rev_page      | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * revision |         1 | rev_page_actor_timestamp |            2 | rev_actor     | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
 * revision |         1 | rev_page_actor_timestamp |            3 | rev_timestamp | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |

