private function fetchThreadCount($board, $thread_id, $preview_count) {
$query = prepare("SELECT COUNT(NULLIF(TRIM(files), '')) as file_count, COUNT(id) as post_count FROM ``posts_$board`` WHERE `thread` = :id ORDER BY `time` DESC LIMIT :offset , 18446744073709551615;");
$query = prepare("SELECT COUNT(NULLIF(TRIM(files), '')) as file_count, COUNT(id) as post_count FROM (SELECT * FROM ``posts_$board`` WHERE `thread` = :id ORDER BY `time` DESC LIMIT :offset , 18446744073709551615);");