While looking into T111605 I saw that, at least on de.wiki, there are multiple revisions where rev_user_text doesn't agree with user_name. They seem to be renamed users, no idea whether it has to do with import or not.
Cf. T47746: Partial rename for specific user on collabwiki
MariaDB [dewiki_p]> SELECT rev_id, rev_user_text, user_name FROM revision JOIN logging ON rev_page = log_page AND log_type = 'import' JOIN user ON user_id = rev_user AND user_name <> rev_user_text WHERE rev_user > 0 AND rev_user_text NOT RLIKE '(^([0-9]{1,3}[.]){3}[0-9]{1,3}$|^([[:alnum:]]{1,4}[:]){7})' AND rev_page > 0 AND rev_timestamp < log_timestamp; +----------+------------------+----------------+ | rev_id | rev_user_text | user_name | +----------+------------------+----------------+ | 65704381 | Justbridge | Justus Brücke | | 65704381 | Justbridge | Justus Brücke | | 70359432 | Daniele Pugliesi | Aushulz | | 71300545 | Justbridge | Justus Brücke | | 71055673 | Onee | O.Koslowski | | 71552070 | Wolf32at | DerGraueWolf | | 71565974 | Justbridge | Justus Brücke | | 72031462 | Schomynv | Mme Mim | | 71521249 | Wolf32at | DerGraueWolf | | 72188986 | Justbridge | Justus Brücke | | 72189041 | Justbridge | Justus Brücke | | 76268012 | Daniele Pugliesi | Aushulz | | 80066897 | Wolf32at | DerGraueWolf | | 80104475 | Wolf32at | DerGraueWolf | | 80104490 | Wolf32at | DerGraueWolf | | 80275224 | Wolf32at | DerGraueWolf | | 81711131 | Schomynv | Mme Mim | | 82198242 | Wolf32at | DerGraueWolf | | 82696379 | Onee | O.Koslowski | | 82161477 | Wolf32at | DerGraueWolf | | 83372859 | Schomynv | Mme Mim | | 84881377 | Daniele Pugliesi | Aushulz | | 84881378 | Daniele Pugliesi | Aushulz | | 71243433 | Wolf32at | DerGraueWolf | | 88657167 | Wolf32at | DerGraueWolf | | 88657167 | Wolf32at | DerGraueWolf | | 88657167 | Wolf32at | DerGraueWolf | | 88657167 | Wolf32at | DerGraueWolf | | 88657167 | Wolf32at | DerGraueWolf | | 88657167 | Wolf32at | DerGraueWolf | | 88657167 | Wolf32at | DerGraueWolf | | 88838955 | Wolf32at | DerGraueWolf | | 88838955 | Wolf32at | DerGraueWolf | | 88914751 | Wolf32at | DerGraueWolf | | 88914751 | Wolf32at | DerGraueWolf | | 88914751 | Wolf32at | DerGraueWolf | | 88914751 | Wolf32at | DerGraueWolf | | 88914751 | Wolf32at | DerGraueWolf | | 88914751 | Wolf32at | DerGraueWolf | | 88914751 | Wolf32at | DerGraueWolf | | 89043632 | Wolf32at | DerGraueWolf | | 89043632 | Wolf32at | DerGraueWolf | | 89043632 | Wolf32at | DerGraueWolf | | 89043632 | Wolf32at | DerGraueWolf | | 89043632 | Wolf32at | DerGraueWolf | | 89043632 | Wolf32at | DerGraueWolf | | 89043632 | Wolf32at | DerGraueWolf | | 89043632 | Wolf32at | DerGraueWolf | | 89093460 | Wolf32at | DerGraueWolf | | 89093460 | Wolf32at | DerGraueWolf | | 89093460 | Wolf32at | DerGraueWolf | | 89093460 | Wolf32at | DerGraueWolf | | 89093460 | Wolf32at | DerGraueWolf | | 89093460 | Wolf32at | DerGraueWolf | | 89093460 | Wolf32at | DerGraueWolf | | 89093460 | Wolf32at | DerGraueWolf | | 89142041 | Wolf32at | DerGraueWolf | | 89142041 | Wolf32at | DerGraueWolf | | 89142041 | Wolf32at | DerGraueWolf | | 89142041 | Wolf32at | DerGraueWolf | | 89142041 | Wolf32at | DerGraueWolf | | 89142041 | Wolf32at | DerGraueWolf | | 89142041 | Wolf32at | DerGraueWolf | | 89142041 | Wolf32at | DerGraueWolf | | 89178635 | Wolf32at | DerGraueWolf | | 89178635 | Wolf32at | DerGraueWolf | | 89178635 | Wolf32at | DerGraueWolf | | 89178635 | Wolf32at | DerGraueWolf | | 89178635 | Wolf32at | DerGraueWolf | | 89178635 | Wolf32at | DerGraueWolf | | 89178635 | Wolf32at | DerGraueWolf | | 89178635 | Wolf32at | DerGraueWolf | | 90316474 | Wolf32at | DerGraueWolf | | 90316474 | Wolf32at | DerGraueWolf | | 90316474 | Wolf32at | DerGraueWolf | | 90316474 | Wolf32at | DerGraueWolf | | 90392157 | Wolf32at | DerGraueWolf | | 90392157 | Wolf32at | DerGraueWolf | | 90392157 | Wolf32at | DerGraueWolf | | 90392157 | Wolf32at | DerGraueWolf | | 90452954 | Wolf32at | DerGraueWolf | | 90452954 | Wolf32at | DerGraueWolf | | 90452954 | Wolf32at | DerGraueWolf | | 90452954 | Wolf32at | DerGraueWolf | | 90470725 | Wolf32at | DerGraueWolf | | 90470725 | Wolf32at | DerGraueWolf | | 71309622 | Justbridge | Justus Brücke | | 94168877 | Wolf32at | DerGraueWolf | | 94168879 | Wolf32at | DerGraueWolf | | 94169816 | Wolf32at | DerGraueWolf | | 94169818 | Wolf32at | DerGraueWolf | | 94751417 | Wolf32at | DerGraueWolf | | 95715586 | GoAvs | Avaholic | | 98491034 | Schomynv | Mme Mim | | 99800361 | Daniele Pugliesi | Aushulz | | 99800362 | Daniele Pugliesi | Aushulz | | 99800365 | Daniele Pugliesi | Aushulz | | 70093631 | Justbridge | Justus Brücke | | 70093644 | Justbridge | Justus Brücke | | 70093693 | Justbridge | Justus Brücke | | 70093739 | Justbridge | Justus Brücke | | 80124540 | Wolf32at | DerGraueWolf | +----------+------------------+----------------+ 102 rows in set (1 min 3.93 sec)
Query too slow to run:
SELECT rev_id, rev_user_text, user_name -> FROM revision -> JOIN user -> ON user_id = rev_user -> AND user_name <> rev_user_text;