Hibernate Annotation for Entity existing in more than 1 catalog

Question

I have a Person entity mapped by Hibernate to a database table in a database catalog \"Active\". After a period of time, records in this database table in the \"Active\" catalo

Answer 1

To my knowledge, that would be the right way to do it with annotations (you kinda have two tables so you need two entities). Then run a polymorphic query on the Person entity. I find this pretty clean by the way.

PS: Can you add a pointer on how to do this with mapping files, I'm really curious.

Answer 2

My thought would be to write a query to select both tables from db A and B. then create a query with hibernate and map it to your class.

example:

@Entity
@NamedNativeQuery(
name="GetAllPerson",
query="select * from A.Person inner join B.Person on A.Person.Id = B.Person.Id"
)
public class Person  {
...
}

Not sure if it could work, your question made me also curious about the best way to do it :). I'll test it tonight after work and see if its any good.

Answer 3

I think there is a subproject of hibernate named shards. It is designed to work with multiple relational databases. If you want to use it, you may need big changes in your code.