Manual:revision_comment_temp table

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Manual:Contents MediaWiki database layout revision_comment_temp table
MediaWiki version:

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 revision in the future.

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



Key to revision.rev_id


Key to comment.comment_id

Schema summary[edit]

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    |       |