Re: 21 bit number for sequence

From: "Shoaib Mir" <shoaibmir(at)gmail(dot)com>
To: "Martijn van Oosterhout" <kleptog(at)svana(dot)org>, "PostgreSQL General" <pgsql-general(at)postgresql(dot)org>
Subject: Re: 21 bit number for sequence
Date: 2006-04-15 08:11:49
Message-ID: bf54be870604150111s28e0f0albb2a80a9813157a7@mail.gmail.com
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Actually that is the application requirment to use 21 bit numbers as porting
it from Oracle where it used to work.

Yeah now i have decided to use a numeric data type in a table and use that
to write my own nextval and currval functions for that purpose.

Thanks for the help.

/Shoaib

On 4/15/06, Martijn van Oosterhout <kleptog(at)svana(dot)org> wrote:
>
> On Sat, Apr 15, 2006 at 12:52:49PM +0500, Shoaib Mir wrote:
> > Actually what i want to do is store 100000000000000100000 as the maximum
> > value in sequence. Is there a way for it ?
>
> Is that number in binary or decimal? In binary it's easy because it's
> only 1048608 decimal. In decimal it would require 66 bits, which
> doesn't fit. The is still: why do you want a *sequence* to go that
> high? A sequence starts counting a 1 and goes up until the limit. At
> one count per second you'd take several million million years to get
> though. Bigint indeed only goes upto 9223372036854775807.
>
> If you just want to store numbers, use numeric. Why do you want to
> combine numeric and a sequence?
> --
> Martijn van Oosterhout <kleptog(at)svana(dot)org> http://svana.org/kleptog/
> > Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
> > tool for doing 5% of the work and then sitting around waiting for
> someone
> > else to do the other 95% so you can sue them.
>
>
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