错误信息：
[2020-03-01T18:55:48+08:00][error] [42000]SQLSTATE[42000]: Syntax error or access violation: 1305 SAVEPOINT trans522 does not exist[D:\phpstudy_pro\WWW\jrapi\vendor\topthink\think-orm\src\db\PDOConnection.php:1404]      Db::startTrans();
        try {
        
            $r1 = 1
            $r2 = 1;
            $r3 = Db::name('user')->where('user_id', 1)->update($updateorder);

            if ($r1 !== false && $r2  && $r3) {
                Db::commit();
            } else {
                Db::rollback();
            }

        } catch (\Exception $e) {
            // 回滚事务
            Db::rollback();
        }