Doctrine 2: how do you use a subquery column (in the SELECT clause)

Question

I\'m trying to do a simple select query with a subquery in the SELECT clause and have simply not found a way to do it. I\'ve tried with both DQL and with the QueryBuilder, n

Answer 1

$query = $qb->select('a')
    ->addSelect('(SELECT at.addresstypeName
            FROM e:Addresstype at
            WHERE at.addresstypeId = a.addresstypeId) AS addresstypeName'
        )
    ->from('e:Address', 'a')
    ->where('a.addressId = :addressId')
    ->setParameter('addressId', 1);