id generator increment

atn473 · **Joined:** Fri Nov 19, 2004 6:35 am **Posts:** 19

Hi,
When you define your generator to be "increment", will it behave similar
to a sequence (increment by 1)?.
To my understanding, Hibernate will invisibly fetch the MAX ID in the table
where an INSERT will occur and increment it by 1.
So, in my code, i wont need to manually fetch the MAX ID.
Is my understanding correct?.

By how much will the next value be incremented?.. can it be overriden?

Cheers!.

emmanuel · **Posted:** Wed Dec 29, 2004 5:46 am

Retrieve the max id once and then increment by 1 as per the javadoc. It is not safe in a cluster

amhest · **Posted:** Wed Dec 29, 2004 11:05 am

I guess I misread the source code for IncrementGenerator.

Has anyone on this forum written a PostInsertIncrementGenerator?

I think the calculation has to happen as part of the insert or two transactions would be issued the same Id. My product has to run with a Max + 1 identity strategy because the some supported RDBMSs do not support sequences or Identity and a second VB app accesses the database directly.