title: Get raw sql from Phalcon query builder
body: <p>Is it possible to extract raw sql query from the query builder instance in Phalcon? Something like this?</p>
  
  <pre><code>$queryBuilder = new Phalcon\Mvc\Model\Query\Builder();
  $queryBuilder
      -&gt;from(…)
      -&gt;where(…);
  
  $rawSql = $queryBuilder-&gt;hypotheticalGetRawQueryMethod();
  </code></pre>