Workerman/MySQL 执行csv导入失败

$DB->query("LOAD DATA INFILE '".$files['tmp_name']."' INTO TABLE `tuanwei` FIELDS TERMINATED BY ',' LINES TERMINATED BY '\r\n';",null,PDO::MYSQL_ATTR_USE_BUFFERED_QUERY);

SQL:LOAD DATA INFILE '/tmp/workerman.upload.NOavoH' INTO TABLE `tuanwei` FIELDS TERMINATED BY ',' LINES TERMINATED BY ' '; SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active. Consider using PDOStatement::fetchAll(). Alternatively, if your code is only ever going to run against mysql, you may enable query buffering by setting the PDO::MYSQL_ATTR_USE_BUFFERED_QUERY attribute.