Question

I have the follwoing sequence defined in oracle:

CREATE SEQUENCE MySequence
MINVALUE 65536 
MAXVALUE 4294967296 
START WITH 65536
INCREMENT BY 1
CYCLE
NOCACHE
ORDER;

I wonder how can I access this via Hibernate (the next value each time i request) ? (via JDBC i have used getGEnerateKeys)

I need the id before I use it on another entity that needs to be persisted.

Thanks

Answer 1

For Oracle you should use GenerationType.SEQUENCE

  @Id
    @GeneratedValue(generator="MySequence", strategy=GenerationType.SEQUENCE)
    @SequenceGenerator(allocationSize=1, name="MySequence", sequenceName="MySequence")

Edit: sequencename updated

Edit: refer to your comment:
Your requirement sounds like composit/embedded id (using multiple columns as primary key) using sequence. but unfortunately both solution doesnt support sequence generator. So far I can say;

*You can create a native query via hibernate and append to index number using ‘select mySequence.nextval from dual.

*Or you can create an oracle view for that with the new column which is showing sequence + index via subquery.

*This one very experimental and I didnt try but you can use @formula annotation. Example here.