-- Rename the archive.ar_usertext_timestamp index to usertext_timestamp. -- This is for MySQL only and is only necessary on wikis freshly installed on -- 1.28.0 when bug T154872 was present. The patch will probably be removed in -- 1.29 since we plan on renaming the index properly to ar_usertext_timestamp. ALTER TABLE /*$wgDBprefix*/archive DROP INDEX ar_usertext_timestamp, ADD INDEX usertext_timestamp (ar_user_text,ar_timestamp);