On Tue, Nov 22, 2011 at 2:43 PM, David Johnston <polobo@xxxxxxxxx> wrote: > Just create a single sequence for each year and then call the proper one > on-the-fly. You can create multiple sequences in advance and possible even > auto-create the sequence the first time one is attempted to be used in a > given year. If you can live with possible (but probably unlikely) gaps in > the sequence then all the concurrency will be handled for you and you can > focus on writing a function that, given a year, will return the proper > value. I personally think the 'record the next to be inserted value' in a table somewhere is better unless you are trying to support a lot of concurrent operations. Also the gap issue is more likely to come up than you're letting on -- a rolled back transaction is all it takes. merlin -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
