Manual:image_comment_temp table

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Manual:Contents MediaWiki database layout image_comment_temp table


MediaWiki versions: 1.30 – 1.31

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

This table was introduced in Gerrit change 357892. See also the revision_comment_temp table.

In MediaWiki 1.32, the image_comment_temp table is merged into the image table with task T188132. After that, the image_comment_temp table is removed.

Fields[edit]

imgcomment_name[edit]

Key to image.img_name

imgcomment_description_id[edit]

Key to comment.comment_id

Schema summary[edit]

MediaWiki versions: 1.30 – 1.31

DESCRIBE image_comment_temp;

+---------------------------+---------------------+------+-----+---------+-------+
| Field                     | Type                | Null | Key | Default | Extra |
+---------------------------+---------------------+------+-----+---------+-------+
| imgcomment_name           | varbinary(255)      | NO   | PRI | NULL    |       |
| imgcomment_description_id | bigint(20) unsigned | NO   | PRI | NULL    |       |
+---------------------------+---------------------+------+-----+---------+-------+