Hibernate Tips: Pitfalls/Difficulties in using Hibernate as ORM framework

[meenakshi sundar]

Hi ,

What are pitfalls or difficulties in using Hibernate as ORM?
Hibernate can, to some extents, simply data access code. But when the data model is complex, it might be difficult to map
in terms of application performance.What areas do you find are tricky in using ORM like hibernate?

Warm Regards
Sundar