How to create negative primary keys in java hibernate?

Question

We have a table in which data is inserted from two different sources with their own primary key generation techniques. So, there is a strong possibility that primary key conflict happens. We want to make one of the sources to create negative primary keys using hibernate to prevent such conflict. Is it possible? and How? Thank you in advance

Answer 1

If you want to create a generation with negative number here is a way in your database

 create sequence SEQ_ACE_WORKERS
       MINVALUE -100 
       MAXVALUE 1 
       START WITH -99
       INCREMENT BY 1 
        ;

And in your hibernate class you change the strategy to "sequence". But i think to go further that you should really use the same sequence for the two sources