By making a one-to-many association bidirectional I understand that it results in more efficient SQL and stops the not-null constraint problem on the 'many' table.

Section 6.8 of the docs says that "Hibernate does not support bidirectional one-to-many associations with an indexed collection"..

I need an indexed collection, so I'm I correcting in thinking that I just use a unidirectional association and put up with the problems that the bidirectional association would normally fix?