Manual:querycachetwo table
| â Manual:Contents | MediaWiki database layout | querycachetwo table |
| MediaWiki version: | ≥ 1.9 |
The querycachetwo table is a table used for caching expensive grouped queries that need two links (for example double-redirects).
Fields
[edit]qcc_type
[edit]A key name, generally the base name of the special page.
qcc_value
[edit]Some sort of stored value. Sizes, counts...
qcc_namespace
[edit]Target namespace. Used in conjunction with qcc_title.
qcc_title
[edit]Target title. Used in conjunction with qcc_namespace.
qcc_namespacetwo
[edit]Target namespace2. Used in conjunction with qcc_titletwo.
qcc_titletwo
[edit]Target title2. Used in conjunction with qcc_namespacetwo.
Schema summary
[edit]| MediaWiki version: | ≥ 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 | | | | ------------------ ------------------ ------ ----- --------- -------
| MediaWiki version: | 1.10 |
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 | | ------------------ ------------------ ------ ----- --------- -------
| MediaWiki version: | 1.9 |
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
[edit]| MediaWiki version: | ≥ 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 | | | --------------- ------------ -------------- -------------- ------------------ ----------- ------------- ---------- -------- ------ ------------ --------- ---------------