Manual:Site identifiers table
| â Manual:Contents | MediaWiki database layout | site_identifiers table |
| MediaWiki version: | ≥ 1.21 |
The site_identifiers table contains:
Fields
si_site
ID of site record in sites table.
si_type
One of two values:
- interwiki: the key is an interwiki link identifier such as en, tr, simple
- equivalent: the key is a navigation id used in e.g. the "language links" section
In most cases these entries are both present and are identical for Wikimedia sites. Some sites have only an interwiki entry, for example commons, mediawiki, meta.
si_key
A language code or other link code, such as en, tr, simple, commons, plwikimedia, identifying a site's type for purposes of links between sites in a wiki farm.
Schema summary
| MediaWiki version: | ≥ 1.35 |
DESCRIBE site_identifiers;
+---------+------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +---------+------------------+------+-----+---------+-------+ | si_type | varbinary(32) | NO | PRI | NULL | | | si_key | varbinary(32) | NO | PRI | NULL | | | si_site | int(10) unsigned | NO | MUL | NULL | | +---------+------------------+------+-----+---------+-------+
| MediaWiki versions: | 1.21 – 1.34 |
DESCRIBE site_identifiers;
+---------+------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +---------+------------------+------+-----+---------+-------+ | si_site | int(10) unsigned | NO | MUL | NULL | | | si_type | varbinary(32) | NO | PRI | NULL | | | si_key | varbinary(32) | NO | PRI | NULL | | +---------+------------------+------+-----+---------+-------+
Indexes
| MediaWiki version: | ≥ 1.36 |
SHOW INDEX IN site_identifiers;
+------------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ | Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment | +------------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ | site_identifiers | 0 | PRIMARY | 1 | si_type | A | 0 | NULL | NULL | | BTREE | | | | site_identifiers | 0 | PRIMARY | 2 | si_key | A | 0 | NULL | NULL | | BTREE | | | | site_identifiers | 1 | si_site | 1 | si_site | A | 0 | NULL | NULL | | BTREE | | | | site_identifiers | 1 | si_key | 1 | si_key | A | 0 | NULL | NULL | | BTREE | | | +------------------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+