I have a table A which has 1 foreign key (this foreign key include 2 fields which are primary of another table B)

But I dot no how to map this in persistent class and mapping file.

I receive the following error when running.
Error :
Foreign key in table A must have same number of columns as referenced primary key in table B.

Pls tell me how to do that.

Thanks a lot.

Look at composite-id (don't forget to override equals and gethashmap).

It should look like your database, so parent table A should have a composite-id. Child table B should have a many-to-one defined with two columns.

I understand your solution but i don't know how to implement this. Could you give me an example ?

Thanks in advance.