symfony/src/Symfony/Bundle/DoctrineBundle/Resources/config/dbal.xml

<?xml version="1.0" ?>

<container xmlns="http://www.symfony-project.org/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.symfony-project.org/schema/dic/services http://www.symfony-project.org/schema/dic/services/services-1.0.xsd">

    <parameters>
        <parameter key="doctrine.dbal.default_connection">default</parameter>
        <parameter key="doctrine.dbal.logger.debug_class">Doctrine\DBAL\Logging\DebugStack</parameter>
        <parameter key="doctrine.dbal.logger_class">Symfony\Bundle\DoctrineBundle\Logger\DbalLogger</parameter>
        <parameter key="doctrine.dbal.configuration_class">Doctrine\DBAL\Configuration</parameter>
        <parameter key="doctrine.data_collector.class">Symfony\Bundle\DoctrineBundle\DataCollector\DoctrineDataCollector</parameter>
        <parameter key="doctrine.dbal.event_manager_class">Doctrine\Common\EventManager</parameter>
        <parameter key="doctrine.dbal.events.mysql_session_init.class">Doctrine\DBAL\Event\Listeners\MysqlSessionInit</parameter>
        <parameter key="doctrine.dbal.events.oracle_session_init.class">Doctrine\DBAL\Event\Listeners\OracleSessionInit</parameter>
        <parameter key="doctrine.dbal.logging">0</parameter>
    </parameters>

    <services>
        <service id="doctrine.dbal.logger.debug" class="%doctrine.dbal.logger.debug_class%" public="false" />

        <service id="doctrine.dbal.logger" class="%doctrine.dbal.logger_class%" public="false">
            <argument type="service" id="logger" on-invalid="null" />
        </service>

        <service id="doctrine.data_collector" class="%doctrine.data_collector.class%" public="false">
            <tag name="data_collector" template="DoctrineBundle:Collector:db" id="db" />
            <argument type="service" id="doctrine.dbal.logger" />
        </service>
    </services>
</container>