Hello Hibernate

1.md

data Teacher = T { students :: [Student]
                 , departs :: [Department]
                }
-- Student and Department do not matter so far

-- HQL

1. select Teacher where id = 'abc';
2. then hibernate will eager fetch students and departs with extra 2 queries;


-- SQL
-- results size = N * M, given Student.size is N and Department.size is M
select * from Teacher
join Student ...
join Department ...
where Teacher.id = 'abc';