Re: Getting consecutive sequence values

From: Dennis Gearon <gearond(at)cvc(dot)net>
To: nolan(at)celery(dot)tssi(dot)com
Cc: pgsql list <pgsql-general(at)postgresql(dot)org>
Subject: Re: Getting consecutive sequence values
Date: 2003-04-04 19:31:04
Message-ID: 3E8DDD78.8020506@cvc.net
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-general

you might try multiple sequences started with different values.

seq_from800
seq_from900,

etc.

A better way would be to use an intermediate table with the sequence showing
which values have been used. Not clearly thought out in my head though.

nolan(at)celery(dot)tssi(dot)com wrote:
> (The first copy of this got stalled because of internal addressing issues,
> hopefully it will not be duplicated.)
>
> I'm using a sequence to generate unique 8 digit record keys which will be
> given out as membership ID's.
>
> Because we want to be able to pre-assign blocks of membership numbers
> for use in off-line membership registration situations, I need to be able
> to ensure that a block of sequences are in consecutive order even though
> they may be requested concurrently with other activity on the sequence.
>
> If I use SQL such as "select nextval('id'),nextval('id'),...,nextval('id')"
> to allocate 50 or 100 sequence numbers, will the backend ensure that
> those sequence numbers are a consecutive block?
> --
> Mike Nolan
> nolan(at)tssi(dot)com
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 6: Have you searched our list archives?
>
> http://archives.postgresql.org
>

In response to

Browse pgsql-general by date

  From Date Subject
Next Message Lonni J Friedman 2003-04-04 19:51:14 Re: unable to dump database, toast errors
Previous Message Dave Smith 2003-04-04 19:24:20 Re: Getting consecutive sequence values