After some discussion, we are moving back the date by a week to 3/19/2019 for people to have a bit more time to update tools and such. Thanks everyone!
Brooke Storm Operations Engineer Wikimedia Cloud Services bst...@wikimedia.org <mailto:bst...@wikimedia.org> IRC: bstorm_ > On Mar 7, 2019, at 9:13 AM, Brooke Storm <bst...@wikimedia.org> wrote: > > Since the MCR refactor of the Mediawiki database schema has been progressing > (https://phabricator.wikimedia.org/T166733 > <https://phabricator.wikimedia.org/T166732> and many other tickets), one of > the last steps is dropping the columns from the wiki replica schema. > > The column drops are being tracked and are explained well here > https://phabricator.wikimedia.org/T212972 > <https://phabricator.wikimedia.org/T212972>, and currently the change is > ready to be applied. It is already applied to two wikis (eswiki and huwiki > since there was a column problem that needed fixing). The tables with names > such as <tablename>_compat will retain a similar structure if that is needed > for refactoring. > > From the ticket, this is a summary of what is changing, organized by table > name: > archive: Remove ar_comment > archive_userindex: Remove ar_comment > filearchive: > Remove fa_deleted_reason > Remove fa_description > filearchive_userindex: > Remove fa_deleted_reason > Remove fa_description > image: Remove img_description > ipblocks: Remove ipb_reason. > ipblocks_ipindex: Remove ipb_reason. > logging: Remove log_comment. > logging_logindex: Remove log_comment. > logging_userindex: Remove log_comment. > oldimage: Remove oi_description > oldimage_userindex: Remove oi_description > recentchanges: Remove rc_comment. > recentchanges_userindex: Remove rc_comment. > revision: Remove rev_comment. > revision_userindex: Remove rev_comment. > > The changes to the _compat tables should not affect anything. > > We will deploy the change early next week (Tuesday - 3/12/2019). In most > cases, if a table isn’t working for your tool or app anymore because of the > change, you can switch to a table named $tablename_compat and it will appear > to have the same schema, but it is recommended that comment references use a > join to the new comment table on a “comment_id” field instead where possible. > > Brooke Storm > Operations Engineer > Wikimedia Cloud Services > bst...@wikimedia.org <mailto:bst...@wikimedia.org> > IRC: bstorm_ >
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