在Doctrine2中计算对数据库的查询

Question

如何在Doctrine2中获取对数据库的查询次数？我只需要统计数据，并了解更多主义如何工作，在不同情况下产生多少查询。但无论如何，怎么做？

Answer 1

$stack = new \Doctrine\DBAL\Logging\DebugStack();
$entityManager->getConfiguration()->setSQLLogger($stack);
// do stuff
var_dump($stack);

Answer 2

只是添加到已接受的答案。

要从Symfony 2.x控制器的上下文中执行此操作：

$doctrine = $this->get('doctrine');
$doctrine = $this->getDoctrine();    
$em = $doctrine->getConnection();

// $doctrine->getManager() did not work for me 
// (resulted in $stack->queries being empty array)

$stack = new \Doctrine\DBAL\Logging\DebugStack();
$em->getConfiguration()->setSQLLogger($stack);


... // do some queries

var_dump($stack->queries);

感谢此帖：http://vvv.tobiassjosten.net/symfony/logging-doctrine-queries-in-symfony2/