After T148332 and its alleged fix [0], the installation of postgres is still broken[1]. It should be clear that this is a regression compared to installations like 1.26+ [2].
MediaWiki 1.28.0-alpha Updater Your composer.lock file is up to date with current dependencies! Going to run database updates for its_a_mw Depending on the size of your database this may take a while! ...skipping: 'mwuser' table doesn't exist yet. ...skipping: 'mwuser' table doesn't exist yet. ...skipping: 'pagecontent' table doesn't exist yet. Creating sequence logging_log_id_seq [e3e26792c5a8f9d2d49f7c14] [no req] DBQueryError from line 1054 of /home/travis/build/SemanticMediaWiki/mw/includes/libs/rdbms/database/Database.php: A database query error has occurred. Did you forget to run your application's database schema updater after upgrading? Query: CREATE SEQUENCE logging_log_id_seq Function: Database::query Error: 42P07 ERROR: relation "logging_log_id_seq" already exists Backtrace: #0 /home/travis/build/SemanticMediaWiki/mw/includes/libs/rdbms/database/DatabasePostgres.php(247): Database->reportQueryError(string, string, string, string, boolean) #1 /home/travis/build/SemanticMediaWiki/mw/includes/libs/rdbms/database/Database.php(912): DatabasePostgres->reportQueryError(string, string, string, string, boolean) #2 /home/travis/build/SemanticMediaWiki/mw/includes/installer/PostgresUpdater.php(613): Database->query(string) #3 [internal function]: PostgresUpdater->addSequence(string, boolean, string) #4 /home/travis/build/SemanticMediaWiki/mw/includes/installer/DatabaseUpdater.php(473): call_user_func_array(array, array) #5 /home/travis/build/SemanticMediaWiki/mw/includes/installer/DatabaseUpdater.php(434): DatabaseUpdater->runUpdates(array, boolean) #6 /home/travis/build/SemanticMediaWiki/mw/maintenance/update.php(171): DatabaseUpdater->doUpdates(array) #7 /home/travis/build/SemanticMediaWiki/mw/maintenance/doMaintenance.php(111): UpdateMediaWiki->execute() #8 /home/travis/build/SemanticMediaWiki/mw/maintenance/update.php(216): require_once(string) #9 {main}
[0] https://gerrit.wikimedia.org/r/316399
[1] https://travis-ci.org/SemanticMediaWiki/SemanticMediaWiki/jobs/168867830
[2] https://travis-ci.org/SemanticMediaWiki/SemanticMediaWiki/jobs/168056742