How can one do arithmetic on scalar resultsets in hql? Consider a 1:n parent->child relationship:

select
(select count(*) from Child where parent = p)
from Parent p

works just fine.

select
1 + (select count(*) from Child where parent = p)
from Parent p

doesn't. This type of thing is valid in sql. Is there a way to achieve this or have I missed something? And don't put the '1' in the subselect, you crafty little cur. What I really want to do is add the results of two moderately complex subselects.