Hello,
I read the hibernate 3 docs, the migration guide, and the forum posts, but I am still not sure how many-to-one lazy=false, fetch=join, and at class lazy=true, proxy=proxyClass works together. Can someone who has understood all these explain how setting each of these in combination would work?

e.g: I have class A that has many-to-one on class B. When class A is loaded I want to load class B also. To do this, on many-to-one, should I be using lazy=false? Or should I use fetch=join?

With the introduction of lazy on many-to-one, what effect lazy=false would make when set for class B itself?

Do I need to specify proxy=proxyClass on class B? If I do have proxy=proxyClass defined on classB, what effect would I get?

I know a lot of it is explained in the docs, but for some reason, I am not able to have a clear understanding of this.

Partial answer:

I see no real use for lazy=true on a many-to-one. OK is saves you one join, but usually you want to init associated objects immediately.

If you set lazy=true on the class Hibernate uses lazy property fetching (see http://www.hibernate.org/hib_docs/v3/re ... properties). I suggest you do not use this unless you have a table with 100+ columns.