@staabm, no, because query method in implemented interface Connection declared without parameters and HHVM throws fatal error:
```
HipHop Fatal error: Declaration of Doctrine\\DBAL\\Driver\\PDOConnection::query() must be compatible with that of Doctrine\\DBAL\\Driver\\Connection::query() in /path/to/doctrine/dbal/lib/Doctrine/DBAL/Driver/PDOConnection.php on line 30
```