I have a primary key of a table "tabA" that consists of two columns "colA" and "colB". My questions are:

1. How can I specify a mapping so that each of these columns have a separate sequence associated. As far I can see, the generator-element does not apply to a column, but the primary key as a whole?

2. How can I specify a mapping so that when I assign the value of one of these id-fields, the other get populated by a sequence specified by a generator-element?

I suspect I have to do all this manually by querying the sequence first and then assign the values to the Ids, but I was hoping to avoid this.

Regards,
Stein

It's not possible with Hibernate at the moment. In fact, you'll have to retrieve values by yourself, because composite ids are considered assigned (which seems logical to me).

It's simply impossible because it's not even possible to specify any custom IdentifierGenerator, which would have made it quite feasible.

I suppose you're accessing a legacy schema and so that you can't define a surrogate primary key?

Just curious, how would a table be designed like this ?
Normally, a composite key should happen what the key columns itself is a foriegn key.

If the columns are not referenced to any tables, why you want a multiple key columns ?