DoctrineQueryUtils.php

<?php
namespace Example\Doctrine\Util;

use Doctrine\ORM\Query;

class QueryUtils
{
    /**
     * @param Query $query
     * @return array An array with 3 indexes, sql the SQL statement with parameters as ?, params the ordered parameters, and paramTypes as the types each parameter is.
     */
    public static function getRunnableQueryAndParametersForQuery(Query $query)
    {
        $sql = $query->getSQL();
        $c = new \ReflectionClass('Doctrine\ORM\Query');
        $parser = $c->getProperty('_parserResult');
        $parser->setAccessible(true);
        /** @var \Doctrine\ORM\Query\ParserResult $parser */
        $parser = $parser->getValue($query);
        $resultSet = $parser->getResultSetMapping();
        
        // Change the aliases back to what was originally specified in the QueryBuilder.
        $sql = preg_replace_callback('/AS\s([a-zA-Z0-9_]+)/',function($matches) use($resultSet) {
            $ret = 'AS ';
            if($resultSet->isScalarResult($matches[1]))
                $ret.=$resultSet->getScalarAlias($matches[1]);
            else
                $ret.=$matches[1];

            return $ret;

        },$sql);

        $m = $c->getMethod('processParameterMappings');
        $m->setAccessible(true);

        list($params,$types)= $m->invoke($query,$parser->getParameterMappings());

        return ['sql' => $sql, 'params' => $params,'paramTypes' => $types];
    }

}

ExampleUsage.php

<?php
// Example Usage

// Get a Query Builder
$qb = $this->getDoctrine()
            ->getRepository('AppBundle:Example')
            ->getQueryBuilderForParams($params);


$queryInfo = QueryUtils::getRunnableQueryAndParametersForQuery($qb->getQuery());

// Use the query to insert to a temp table.
$this->getDoctrine()
     ->getManager('default')
     ->getConnection()
     ->executeQuery("INSERT INTO my_temp_table (col1,col2,col3,col4) ".$queryInfo['sql'],
                                                $queryInfo['params'],
                                                $queryInfo['paramTypes']);