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* How to make sequence skip existing key in table?
@ 2003-02-18 10:01 Raymond Pau <rpau@yahoo.com>
0 siblings, 2 replies; 4+ messages in thread
From: Raymond Pau @ 2003-02-18 10:01 UTC (permalink / raw)
To: pgsql-sql
Hi List,
I am using sequence to generate to a list of unique
key id that will be used as the primary key for some
tables.
My question is when the sequence wraps over to the
minimum value(1), how can I ensure that the next id is
not in the tables?
Regards,
Raymond Pau
__________________________________________________
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^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: How to make sequence skip existing key in table?
@ 2003-02-18 13:43 Bruno Wolff III <bruno@wolff.to>
parent: Raymond Pau <rpau@yahoo.com>
1 sibling, 0 replies; 4+ messages in thread
From: Bruno Wolff III @ 2003-02-18 13:43 UTC (permalink / raw)
To: Raymond Pau <rpau@yahoo.com>; +Cc: pgsql-sql
On Tue, Feb 18, 2003 at 02:01:34 -0800,
Raymond Pau <rpau@yahoo.com> wrote:
> Hi List,
Please don't start new threads by replying to other messages on the list.
This screws up threading of messages, which is useful for following specific
discussions.
> I am using sequence to generate to a list of unique
> key id that will be used as the primary key for some
> tables.
>
> My question is when the sequence wraps over to the
> minimum value(1), how can I ensure that the next id is
> not in the tables?
My suggestion is to use the bigserial type. This uses bigint as the underlying
type and you are not likely to roll over a 64 bit integer unless you are
wasting a lot of serial values for each one you actually use.
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: How to make sequence skip existing key in table?
@ 2003-02-18 17:07 Josh Berkus <josh@agliodbs.com>
parent: Raymond Pau <rpau@yahoo.com>
1 sibling, 1 reply; 4+ messages in thread
From: Josh Berkus @ 2003-02-18 17:07 UTC (permalink / raw)
To: Raymond Pau <rpau@yahoo.com>; pgsql-sql
Raymond,
> I am using sequence to generate to a list of unique
> key id that will be used as the primary key for some
> tables.
>
> My question is when the sequence wraps over to the
> minimum value(1), how can I ensure that the next id is
> not in the tables?
Do you really expect more than 2.4 billion rows?
--
Josh Berkus
Aglio Database Solutions
San Francisco
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: How to make sequence skip existing key in table?
@ 2003-02-21 06:29 Raymond Pau <rpau@yahoo.com>
parent: Josh Berkus <josh@agliodbs.com>
0 siblings, 0 replies; 4+ messages in thread
From: Raymond Pau @ 2003-02-21 06:29 UTC (permalink / raw)
To: pgsql-sql
--- Josh Berkus <josh@agliodbs.com> wrote:
> Raymond,
>
> > I am using sequence to generate to a list of
> unique
> > key id that will be used as the primary key for
> some
> > tables.
> >
> > My question is when the sequence wraps over to the
> > minimum value(1), how can I ensure that the next
> id is
> > not in the tables?
>
> Do you really expect more than 2.4 billion rows?
No, not really.
I guess my worries are groundless after all.
Thanks.
>
> --
> Josh Berkus
> Aglio Database Solutions
> San Francisco
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^ permalink raw reply [nested|flat] 4+ messages in thread
end of thread, other threads:[~2003-02-21 06:29 UTC | newest]
Thread overview: 4+ messages (download: mbox mbox.gz follow: Atom feed)
-- links below jump to the message on this page --
2003-02-18 10:01 How to make sequence skip existing key in table? Raymond Pau <rpau@yahoo.com>
2003-02-18 13:43 ` Bruno Wolff III <bruno@wolff.to>
2003-02-18 17:07 ` Josh Berkus <josh@agliodbs.com>
2003-02-21 06:29 ` Raymond Pau <rpau@yahoo.com>
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