    public static function enabledSqlLog($connectName = '')
    {

        if ($connectName && $connectionData = self::getConnectionData($connectName)) {

        }// 获取活动链接名的数据库连接信息
        else if($connectionData = self::getConnectionData(self::getActiveConnectName($connectName))) {

        } else {
            return null;
        }
        
        if (!$connectionData->getLogger()) {
            $connectionData->setLogger(new \Doctrine\DBAL\Logging\DebugStack());
        }
    }