Re: calculated identity field in views, again...

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От Bruno Wolff III
Тема Re: calculated identity field in views, again...
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Msg-id 20050504164629.GA30968@wolff.to
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Ответ на Re: calculated identity field in views, again...  (Greg Stark <gsstark@mit.edu>)
Список pgsql-interfaces
On Wed, May 04, 2005 at 11:47:12 -0400,
  Greg Stark <gsstark@mit.edu> wrote:
> Bruno Wolff III <bruno@wolff.to> writes:
>
> > > How do I create sequence ?
> >
> > You can't create a sequence for a view. You would need to have it in a
> > table that is joined as part of the view.
>
> Sure you can. You can have any expression you want, including nextval('seq')
> in your view. The problem is that every time you query it it will provide
> different numbers. I can't see that being useful.

That is more or less what I meant. You can't usefully tie a sequence directly
to a view, the way you can tie one to a table.

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