Re: alternative to using a sequence - Mailing list pgsql-general

From Jorge Godoy
Subject Re: alternative to using a sequence
Date
Msg-id 87wt8vvkvo.fsf@gmail.com
Whole thread Raw
In response to alternative to using a sequence  (snacktime <snacktime@gmail.com>)
List pgsql-general
snacktime <snacktime@gmail.com> writes:

> I have an application that processes financial transactions.  Each of
> these transactions needs to be sent with a sequence number.  It starts
> at 1 and resets to 1 once it hits 8000.   I'm trying to think of the
> most elegant solution without having to create a sequence for each
> user (there are hundreds).  There is a table that holds the
> configuration parameters for each merchant, so a field in that table
> to hold the sequence number would be ideal.  In the past I've used
> sequences as well as just a field which I query then update.  Any
> other ideas?

Take a look at http://www.varlena.com/GeneralBits/

There are some ideas there.  Of course, gapless sequences perform a bit worse
than sequences.  There was this discussion here on the ML last week as well,
so in the archives you'll find even more things to think.

--
Jorge Godoy      <jgodoy@gmail.com>

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