The following bug has been logged online: Bug reference: 3811 Logged by: Adriaan van Os Email address: [EMAIL PROTECTED] PostgreSQL version: 8.2.5 Operating system: Mac OS X 10.5 Description: Getting multiple values from a sequence generator Details:
The following has been observed In Postgres 8.2.5 1. LOCK TABLE doesn't work on a sequence 2. nextval will happily ignore ISOLATION LEVEL SERIALIZABLE of concurrent transactions 3. nextval doesn't have an optional "increase" parameter (the increase is always one). Therefore, there is no way (I know of) to prevent a concurrent nextval between a nextval and a setval call. Consequently, it is not possible to create an atomic operation that increases nextval by a value N > 1. I suggest an optional "increase" parameter to the nextval function. This can make a certain kind of bulk operation and bulk import much more efficient. ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
