Чистый MySQL запрос в Symfony2

public function findByCompany($company)
 {
 $em = $this->getEntityManager();
 $connection = $em->getConnection();
 $statement = $connection->prepare("SELECT a.id, a.responsible, a.company, b.sales_id, b.title
FROM sales_activity AS b LEFT JOIN sales AS a ON ( a.id = b.sales_id ) WHERE a.company = :company");
 $statement->bindValue('company', $company);
 $statement->execute();
 $results = $statement->fetchAll();
 return $results;
 }