Calling next value of a sequence in jpa

Question

I have a class mapped as an Entity to persist it in a database. I have an id field as the primary key so every time the object is persisted the value of the id is retrieved

Answer 1

See another question/answers on the subject of using sequence defined elsewhere than id fields. You can create a fake entity with one field (of type Long id). Connect it to the sequence you defined in the DB. Then create a CrudRepository implementation for that entity and call its save() method with an empty instance of the fake entity object you defined. Hibernate will run for you a "select YOUR_SEQ.NEXTVAL from dual" query.