Within Entity Repository: 

```
$qb = $this->createQueryBuilder('c');
//....
$qb->addSelect('POWER('.$qb->expr()->abs(
                $qb->expr()->diff('c.latitude', $filter['latitude'])
            ).',2) AS ddst';
//....
return $qb->getQuery(); //to Pagerfanta with DoctrineORMAdapter

```

Errors:

```
QueryException: [Syntax Error] line 0, col 11: Error: Expected known function, got 'POWER'

QueryException: SELECT c, (POWER(ABS(c.delivery_latitude - 47.227163),2) AS ddst 
FROM MyEntity c ORDER BY ddst ASC, c.created_at DESC (this is dql error)

```

What's not right? Dql doesn't support POWER. I didn't found it in qb-expressions.