Manual:Externallinks テーブル
| ↑ Manual:コンテンツ | MediaWiki のデータベース レイアウト | externallinks テーブル |
| MediaWiki バージョン: | ≧ 1.6 |
externallinks テーブルでは、MediaWiki が外部リンクを格納して追跡します。 Note unless $wgRegisterInternalExternals is enabled (it is disabled by default), links to the same server are not recorded.
プロトコル相対のリンクは、r102951 に従ってこのテーブルに2回格納されます。
フィールド
el_id
| MediaWiki バージョン: | ≧ 1.22 |
主キーです。 現状では利用されていませんが、オンラインのスキーマ変更の際に役立ちます。
el_from
ウィキ ページを参照するページ識別子です。
el_to_domain_index
| MediaWiki バージョン: | ≧ 1.40 |
This is similar to el_index but only includes the protocol specification and domain in reversed, so http://en.wikipedia.org becomes http://org.wikipedia.en..
el_to_path
| MediaWiki バージョン: | ≧ 1.40 |
Only the path of el_to.
Example:
/wiki/Main_Page
el_to
| MediaWiki バージョン: | 1.6 – 1.41 Gerrit change 954900 |
実際のURLそのまま。 ブラウザーに渡されます。
el_index
| MediaWiki バージョン: | 1.6 – 1.41 Gerrit change 954900 |
これは el_to と同じ URL を検索に最適化したものです: 利用者名やパスワードの情報を除去し、その他の要素は検索を高速化するために逆順にしているため、例えば http://user:password@sub.example.com/page.html は http://com.example.sub./page.html になります。これにより「*.example.com へのリンクをすべて表示」の形式の検索ができるようになります。
el_index_60
| MediaWiki バージョン: | 1.29 – 1.41 Gerrit change 954900 |
部分インデックスでは並べ替え可能なクエリが実行できないため、el_index を 60 バイトに切り捨てたものです。
スキーマの要約
| MediaWiki バージョン: | ≧ 1.41 Gerrit change 954900 |
DESCRIBE externallinks;
+--------------------+------------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +--------------------+------------------+------+-----+---------+----------------+ | el_id | int(10) unsigned | NO | PRI | NULL | auto_increment | | el_from | int(10) unsigned | NO | MUL | 0 | | | el_to_domain_index | varbinary(255) | NO | MUL | | | | el_to_path | blob | YES | | NULL | | +--------------------+------------------+------+-----+---------+----------------+
| MediaWiki バージョン: | 1.40 |
DESCRIBE externallinks;
+--------------------+------------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +--------------------+------------------+------+-----+---------+----------------+ | el_id | int(10) unsigned | NO | PRI | NULL | auto_increment | | el_from | int(10) unsigned | NO | MUL | 0 | | | el_to | blob | NO | MUL | NULL | | | el_index | blob | NO | MUL | NULL | | | el_index_60 | varbinary(60) | NO | MUL | NULL | | | el_to_domain_index | varbinary(255) | NO | MUL | | | | el_to_path | blob | YES | | NULL | | +--------------------+------------------+------+-----+---------+----------------+
| MediaWiki バージョン: | 1.30 – 1.39 |
DESCRIBE externallinks;
+-------------+------------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------------+------------------+------+-----+---------+----------------+ | el_id | int(10) unsigned | NO | PRI | NULL | auto_increment | | el_from | int(10) unsigned | NO | MUL | 0 | | | el_to | blob | NO | MUL | NULL | | | el_index | blob | NO | MUL | NULL | | | el_index_60 | varbinary(60) | NO | MUL | NULL | | +-------------+------------------+------+-----+---------+----------------+
| MediaWiki バージョン: | 1.29 |
DESCRIBE externallinks;
+-------------+------------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +-------------+------------------+------+-----+---------+----------------+ | el_id | int(10) unsigned | NO | PRI | NULL | auto_increment | | el_from | int(10) unsigned | NO | MUL | 0 | | | el_to | blob | NO | MUL | NULL | | | el_index | blob | NO | MUL | NULL | | | el_index_60 | varbinary(60) | NO | MUL | | | +-------------+------------------+------+-----+---------+----------------+
| MediaWiki バージョン: | 1.22 – 1.28 |
DESCRIBE externallinks;
+----------+------------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +----------+------------------+------+-----+---------+----------------+ | el_id | int(10) unsigned | NO | PRI | NULL | auto_increment | | el_from | int(10) unsigned | NO | MUL | 0 | | | el_to | blob | NO | MUL | NULL | | | el_index | blob | NO | MUL | NULL | | +----------+------------------+------+-----+---------+----------------+
| MediaWiki バージョン: | 1.10 – 1.21 |
DESCRIBE externallinks;
+----------+------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +----------+------------------+------+-----+---------+-------+ | el_from | int(10) unsigned | NO | MUL | 0 | | | el_to | blob | NO | MUL | NULL | | | el_index | blob | NO | MUL | NULL | | +----------+------------------+------+-----+---------+-------+
| MediaWiki バージョン: | 1.6 – 1.9 |
DESCRIBE externallinks;
+----------+-----------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +----------+-----------------+------+-----+---------+-------+ | el_from | int(8) unsigned | NO | MUL | 0 | | | el_to | blob | NO | MUL | NULL | | | el_index | blob | NO | MUL | NULL | | +----------+-----------------+------+-----+---------+-------+
インデックス
| MediaWiki バージョン: | ≧ 1.41 |
SHOW INDEX IN externallinks;
+---------------+------------+----------------------------+--------------+--------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ | Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment | +---------------+------------+----------------------------+--------------+--------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ | externallinks | 0 | PRIMARY | 1 | el_id | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_from | 1 | el_from | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_to_domain_index_to_path | 1 | el_to_domain_index | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_to_domain_index_to_path | 2 | el_to_path | A | 0 | 60 | NULL | YES | BTREE | | | +---------------+------------+----------------------------+--------------+--------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| MediaWiki バージョン: | 1.40 |
SHOW INDEX IN externallinks;
+---------------+------------+----------------------------+--------------+--------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ | Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment | +---------------+------------+----------------------------+--------------+--------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ | externallinks | 0 | PRIMARY | 1 | el_id | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_from | 1 | el_from | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_to | 1 | el_to | A | 0 | 60 | NULL | | BTREE | | | | externallinks | 1 | el_to | 2 | el_from | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_index | 1 | el_index | A | 0 | 60 | NULL | | BTREE | | | | externallinks | 1 | el_index_60 | 1 | el_index_60 | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_index_60 | 2 | el_id | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_from_index_60 | 1 | el_from | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_from_index_60 | 2 | el_index_60 | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_from_index_60 | 3 | el_id | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_to_domain_index_to_path | 1 | el_to_domain_index | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_to_domain_index_to_path | 2 | el_to_path | A | 0 | 60 | NULL | YES | BTREE | | | +---------------+------------+----------------------------+--------------+--------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| MediaWiki バージョン: | 1.30 – 1.39 |
SHOW INDEX IN externallinks;
+---------------+------------+------------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ | Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment | +---------------+------------+------------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ | externallinks | 0 | PRIMARY | 1 | el_id | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_from | 1 | el_from | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_from | 2 | el_to | A | 0 | 40 | NULL | | BTREE | | | | externallinks | 1 | el_to | 1 | el_to | A | 0 | 60 | NULL | | BTREE | | | | externallinks | 1 | el_to | 2 | el_from | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_index | 1 | el_index | A | 0 | 60 | NULL | | BTREE | | | | externallinks | 1 | el_index_60 | 1 | el_index_60 | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_index_60 | 2 | el_id | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_from_index_60 | 1 | el_from | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_from_index_60 | 2 | el_index_60 | A | 0 | NULL | NULL | | BTREE | | | | externallinks | 1 | el_from_index_60 | 3 | el_id | A | 0 | NULL | NULL | | BTREE | | | +---------------+------------+------------------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+