Magento2 log all sql queries

di.xml

// in app/etc/di.xml
// change the following lines
<preference for="Magento\Framework\DB\LoggerInterface" type="Magento\Framework\DB\Logger\LoggerProxy"/>

// for the following:

<type name="Magento\Framework\DB\Logger\File">
    <arguments>
        <argument name="logAllQueries" xsi:type="boolean">true</argument>
        <argument name="debugFile" xsi:type="string">log/sql.log</argument>
    </arguments>
</type>