Manual:querycachetwo table
From Linux Web Expert
| ↑ Manual:Contents | <translate> MediaWiki database layout</translate> | <translate> <tvar name=1>querycachetwo</tvar> table</translate> |
| MediaWiki version: | <translate> ≥</translate> 1.9 |
The querycachetwo table is a table used for caching expensive grouped queries that need two links (for example double-redirects).
Fields
qcc_type
A key name, generally the base name of the special page.
qcc_value
Some sort of stored value. Sizes, counts...
qcc_namespace
Target namespace. Used in conjunction with qcc_title.
qcc_title
Target title. Used in conjunction with qcc_namespace.
qcc_namespacetwo
Target namespace2. Used in conjunction with qcc_titletwo.
qcc_titletwo
Target title2. Used in conjunction with qcc_namespacetwo.
Schema summary
| MediaWiki version: | <translate> ≥</translate> 1.11 |
DESCRIBE querycachetwo;
+------------------+------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +------------------+------------------+------+-----+---------+-------+ | qcc_type | varbinary(32) | NO | MUL | NULL | | | qcc_value | int(10) unsigned | NO | | 0 | | | qcc_namespace | int(11) | NO | | 0 | | | qcc_title | varbinary(255) | NO | | | | | qcc_namespacetwo | int(11) | NO | | 0 | | | qcc_titletwo | varbinary(255) | NO | | | | +------------------+------------------+------+-----+---------+-------+<td class="mw-version-versionbox" title="<translate nowrap> MediaWiki <tvar name=1>1.10</tvar> is unsupported version</translate>">
1.10
| MediaWiki version: |
DESCRIBE querycachetwo;
+------------------+------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +------------------+------------------+------+-----+---------+-------+ | qcc_type | varbinary(32) | NO | MUL | NULL | | | qcc_value | int(10) unsigned | NO | | 0 | | | qcc_namespace | int(11) | NO | | 0 | | | qcc_title | char(255) binary | NO | | NULL | | | qcc_namespacetwo | int(11) | NO | | 0 | | | qcc_titletwo | char(255) binary | NO | | NULL | | +------------------+------------------+------+-----+---------+-------+<td class="mw-version-versionbox" title="<translate nowrap> MediaWiki <tvar name=1>1.9</tvar> is unsupported version</translate>">
1.9
| MediaWiki version: |
DESCRIBE querycachetwo;
+------------------+------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +------------------+------------------+------+-----+---------+-------+ | qcc_type | char(32) | NO | MUL | NULL | | | qcc_value | int(5) unsigned | NO | | 0 | | | qcc_namespace | int(11) | NO | | 0 | | | qcc_title | char(255) binary | NO | | NULL | | | qcc_namespacetwo | int(11) | NO | | 0 | | | qcc_titletwo | char(255) binary | NO | | NULL | | +------------------+------------------+------+-----+---------+-------+
Indexes
| MediaWiki version: | <translate> ≥</translate> 1.9 |
SHOW INDEX IN querycachetwo;
+---------------+------------+--------------+--------------+------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ | Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment | +---------------+------------+--------------+--------------+------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+ | querycachetwo | 1 | qcc_type | 1 | qcc_type | A | 0 | NULL | NULL | | BTREE | | | | querycachetwo | 1 | qcc_type | 2 | qcc_value | A | 0 | NULL | NULL | | BTREE | | | | querycachetwo | 1 | qcc_title | 1 | qcc_type | A | 0 | NULL | NULL | | BTREE | | | | querycachetwo | 1 | qcc_title | 2 | qcc_namespace | A | 0 | NULL | NULL | | BTREE | | | | querycachetwo | 1 | qcc_title | 3 | qcc_title | A | 0 | NULL | NULL | | BTREE | | | | querycachetwo | 1 | qcc_titletwo | 1 | qcc_type | A | 0 | NULL | NULL | | BTREE | | | | querycachetwo | 1 | qcc_titletwo | 2 | qcc_namespacetwo | A | 0 | NULL | NULL | | BTREE | | | | querycachetwo | 1 | qcc_titletwo | 3 | qcc_titletwo | A | 0 | NULL | NULL | | BTREE | | | +---------------+------------+--------------+--------------+------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
