Primary Key Type: int vs long

Question

I know some software shops have been burned by using the int type for the primary key of a persistent class. That being said, not all tables grow past 2 billions. As a matte

Answer 1

I use Integer for my surrogate keys unless I have a need for them to be something else. It is not necessary to always use a Long if you don't have a need for it.

(I typically use JPA/Hibernate in my projects running against either Oracle 10g or MySQL 5.x databases.)