This needs to be tested on all databases including both native/freetds MSSQL (your Moodle can be on any single DB, but all supported DBs should be tested using the script below) Create a script with code below and put it in your Moodle root:- <?php require_once('config.php'); $dbtype = 'mysqli'; $dblibrary = 'native'; $targetdb = moodle_database::get_driver_instance($dbtype, $dblibrary, true); $targetdb->connect($data->dbhost, $data->dbuser, $data->dbpass, $data->dbname, false, $dboptions); $tables = $targetdb->get_tables(); print_object($tables); (Replace all database properties with the details of the DB you are connecting to) Make sure you get a proper list printed of tables in your DB printed and not an empty array.