['column1', 'column2'], ...] * @since 13.0.0 */ protected function getColumnsByTable() { return [ 'admin_settings' => ['id'], 'authtoken' => ['id'], 'bruteforce_attempts' => ['id'], 'comments' => ['id', 'parent_id', 'topmost_parent_id'], 'filecache' => ['fileid', 'storage', 'parent', 'mimetype', 'mimepart'], 'file_locks' => ['id'], 'jobs' => ['id'], 'mimetypes' => ['id'], 'mounts' => ['id'], 'personal_settings' => ['id'], 'properties' => ['id'], 'share' => ['id', 'parent', 'file_source'], 'storages' => ['numeric_id'], 'systemtag' => ['id'], 'systemtag_group' => ['systemtagid'], 'systemtag_object_mapping' => ['systemtagid'], 'vcategory' => ['id'], 'vcategory_to_object' => ['objid', 'categoryid'], ]; } }