Yii 上出现错误，如 SQLSTATE[HY000]：一般错误：2014 无法执行查询，而其他无缓冲查询处于活动状态

Question

我得到了像

这样的确切错误

SQLSTATE[HY000]：一般错误：2014 无法执行查询，而 其他无缓冲查询处于活动状态。考虑使用 PDOStatement::fetchAll()。或者，如果您的代码只是 要针对 mysql 运行，您可以通过设置启用查询缓冲 PDO::MYSQL_ATTR_USE_BUFFERED_QUERY 属性。

> 我在我的项目中使用 Yii 框架。 操作系统：Debian GNU/Linux 8 \n \l PHP: PHP 5.6.13-0+deb8u1 mysql：4.2.12deb2 数据库客户端版本： libmysql - 5.5.44

我正在从数据库中获取数据并按照以下代码导出为 csv：

ini_set('memory_limit', '-1');
$cmd = Yii::app()->db->createCommand("select su.name as ConsultantName , su.Surname as ConsultantSurname,su.RegistrationDate as RegistrationDate,su.CardNumber as ConsultantCardNumber,su.SequenceNumber as ConsultantSequenceNumber, 
s.Name as StoreName,s.StoreAddress1 as StoreAddress,s.LeegraCode,s.LeegraRegion as Region ,  n.Name as Network, sg.Name as SuperGroup,sg.CardNumber as SuperGroupCardnumber,sg.SequenceNumber as SuperGroupSequenceNumber, s.ID as AccelerateID,
manager.Name as StoreManagerName, manager.Surname as StoreManagerSurname, manager.CardNumber as ManagerCardNumber, manager.SequenceNumber as ManagerSequenceNumber,fun_total_claim_by_sustemuser(su.ID) as Total_number_of_claims_ever,fun_systemuser_register(su.ID) as Registered_AND_Activated_Yes_No
from systemuser su 
inner join store s on s.ID = su.StoreID
inner join network n on n.ID = su.NetworkID
left join (select man.* from systemuser man inner join store store on store.ID = man.StoreID and RoleID = 3 ) manager on manager.StoreID = s.ID
inner join supergroup sg on sg.ID = s.SuperGroupID
where su.RoleID = 1");

Yii::import('ext.ECSVExport');
$csv = new ECSVExport($cmd);
$content = $csv->toCSV();
$filename="StoreByUserByNetworkByManager.csv"  ;
Yii::app()->getRequest()->sendFile($filename, $content, "text/csv", false);
exit();

同样的代码在我的本地系统上运行，但在新服务器上不起作用，因为我在上面提供了信息。 有人知道出现此错误可能是什么问题吗？

Answer 1

尝试在你的 createCmmand 之前添加它

Yii::app()->db->setAttribute(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, true);