Handbuch:revision_comment_temp-Tabelle

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MediaWiki-Datenbank-Layout

revision_comment_temp-Tabelle

MediaWiki Version:

≥ 1.30

The revision_comment_temp table is a temporary table creating a relation between each row of the revision table and a row of the comment table. It has been created to avoid blocking on an alter of the revision table. On large wikis like the English Wikipedia, altering the revision table is a months-long process. This table is being created to avoid such an alter, and will be merged back into the revision table in the future.

Diese Tabelle wurde in Gerrit change 357892 eingeführt. Siehe auch die image_comment_temp -Tabelle.

Felder

revcomment_rev

Schlüssel zu revision.rev_id

revcomment_comment_id

Schlüssel zu comment.comment_id

Schematische Übersicht

MediaWiki Version:

≥ 1.30

DESCRIBE revision_comment_temp;

+-----------------------+---------------------+------+-----+---------+-------+
| Field                 | Type                | Null | Key | Default | Extra |
+-----------------------+---------------------+------+-----+---------+-------+
| revcomment_rev        | int(10) unsigned    | NO   | PRI | NULL    |       |
| revcomment_comment_id | bigint(20) unsigned | NO   | PRI | NULL    |       |
+-----------------------+---------------------+------+-----+---------+-------+

Indexe

MediaWiki Version:

≥ 1.30

SHOW INDEX IN revision_comment_temp;

+-----------------------+------------+----------------+--------------+-----------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| Table                 | Non_unique | Key_name       | Seq_in_index | Column_name           | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment |
+-----------------------+------------+----------------+--------------+-----------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+
| revision_comment_temp |          0 | PRIMARY        |            1 | revcomment_rev        | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| revision_comment_temp |          0 | PRIMARY        |            2 | revcomment_comment_id | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
| revision_comment_temp |          0 | revcomment_rev |            1 | revcomment_rev        | A         |           0 |     NULL | NULL   |      | BTREE      |         |               |
+-----------------------+------------+----------------+--------------+-----------------------+-----------+-------------+----------+--------+------+------------+---------+---------------+