Manual:Revision table/ja

revision テーブルは、ウィキ内でページに対して行われたそれぞれの編集に関するメタデータを保持します. 単一もしくは複数ページ・スロットへの編集ごとに版レコードが生成されます. そのレコードは、編集をした利用者、編集がなされた日時、リビジョンへのコメントへのリンクような情報を テーブル内に保持します. またその他のメタデータも保持します. The slots that were edited and their corresponding revision are specified in the.

他のウィキにある特定のページの直近の修正のImportは、revision テーブルに2件入力し、1件はインポートした版の日付とウィキ文、もう1件はインポートした日付です. If a page with the same name already existed, then the wikitext of the latter, which becomes that of the current page, is that of the more recent of the two pages.

revision テーブルは テーブルに酷似しています. revision テーブルはページの履歴およびの列挙に使用されます. The table is used for, , , and, in the case of page creation, for the.

差分は以下を含みます:


 * 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.

削除された版は テーブルに移動されます.

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

rev_id
この項目には各版に対する主キーが書かれています. はこの項目への外部キーになっています. 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have been preserved across deletion/undeletion since the table's inception in MediaWiki 1.5, when rev_id and text_id superseded the old cur_id.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
この項目は への参照情報、つまりどのページに関する版であるのかが書かれています. この項目に書かれる値は対応するページの に書かれている値と同じです. 無効な値を設定しないでください. 無効な値を設定するとページの編集履歴が表示されなくなります. 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 which can be retrieved by getting the  for the corresponding revision in the slots table.

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. を参照してください.

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
ユーザーが'細部の編集'チェックボックスをONにしたかどうかを記録します. この項目の値が1であればその編集は「細部の編集」であると宣言されたことに、0であればそうでないことになります. 多くの自動編集は細部の編集であるとしてマークされます.

rev_deleted
This field is reserved for system. It's a bitfield in which the values are DELETED_TEXT = 1; DELETED_COMMENT = 2; DELETED_USER = 4; and DELETED_RESTRICTED = 8. 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. DELETED_RESTRICTED indicates suppression; when this flag is set content hidden by the other DELETED_* flags is only visible to suppressors (i.e. oversighters) instead of admins.

rev_len
この項目にはバイト単位で示したその版での記事の長さが記されています. 履歴ページで使用されます. Corresponds to.

rev_parent_id
The rev_id of the previous revision to the page. Corresponds to. For edits which are new page creations, rev_parent_id = 0.

使用法
This field is used to add support for a tree structure. This field is e.g. used to calculate the size difference of a certain revision with the previous revision in the page history view. 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.

Transferred revisions
When revisions are imported from another wiki, the imported revisions' parent ID tree structure from the source wiki is retained (this is implemented by each revision', other than the tail revision, having a XML element that is used to populate rev_parent_id), and the destination wiki's revisions' parent IDs are not updated. Likewise, when page histories are merged, the parent IDs of the revisions from the source and destination pages are not updated. 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
この項目は（ によって生成される）base-36によるSHA-1テキスト内容ハッシュ値を追加するのに使われます. バージョン1.32より、その版に関するすべてのslotに渡る のハッシュ値群を入れ子にしたハッシュ値になっています. 版にslotが1つしかない場合、rev_sha1 と content_sha1 の値は同じになります. 入れ子にしたハッシュのアルゴリズムは に実装されています. その概要は以下の通りです:

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'. 取りうる値の例: '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. 取りうる値の例: '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.



スキーマの要約
++-+--+-+-++ ++-+--+-+-++ ++-+--+-+-++
 * 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       |                |

インデックス
 +--++--+--+---+---+-+--++--++-+---+ +--++--+--+---+---+-+--++--++-+---+ +--++--+--+---+---+-+--++--++-+---+
 * 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      |         |               |

