Hi,

in my project I am using the hibernate 3.3.2 and the JPA implementation.
I have a problem with oneToMany relations which I will try to describe briefly.
There are 3 tables: A, B and C with a 1 to m relation from A to B and a 1 to n relation from A to C. I am using Oracle 10 g and the relations are created with the help of foreign keys. In the code the relations are specified with the help of oneToMany and manyToOne annotations.
for example:
@OneToMany(cascade = CascadeType.ALL, fetch = FetchType.EAGER, mappedBy = "a_id") - in class A twice (for B and C)

and @ManyToOne(fetch = FetchType.LAZY, optional=true)
@JoinColumn(name = "a_id", unique=true)
in B and C.

The problem is: when an object a is generated then are b x c elements in every list, which means internally hibernate makes a join over all 3 tables based on a_id. But there is no relation between B and C and the elements are independent from each other.

Is this a known behaviour? Or is there any solution for generating only the necessary lists?

I don't know of any such a solution