Обсуждение: nextval::text

I was just wondering why in the generated schema nextval is cast to text rather than int?

John

CREATE TABLE x (
    id integer DEFAULT nextval('"x_id_seq"'::text) NOT NULL,
    name character varying(30) NOT NULL
);

On Tue, Mar 04, 2003 at 10:54:34PM -0800, John Smith wrote:
>
> I was just wondering why in the generated schema nextval is cast to text rather than int?

I think you're misreading. It's the string being passed to nextval that is
being cast to text, not the return value.

> John
>
> CREATE TABLE x (
>     id integer DEFAULT nextval('"x_id_seq"'::text) NOT NULL,
>     name character varying(30) NOT NULL
> );
>
>
>
> ---------------------------------
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--
Martijn van Oosterhout   <kleptog@svana.org>   http://svana.org/kleptog/
> Support bacteria! They're the only culture some people have.

Because that's the name of the sequence, not the value coming out of the sequence.

3/4/2003 10:54:34 PM, John Smith <john_smith_45678@yahoo.com> wrote:

>
>
>  Date:   Tue, 4 Mar 2003 22:54:34 -0800 (PST)
>
>  From:   John Smith <john_smith_45678@yahoo.com>
>  Subject:[GENERAL] nextval::text
>  To:     pgsql-general@postgresql.org
>
>
>
>
>  I was just wondering why in the generated schema nextval is cast to text
>  rather than int?
>
>
>  John
>
>  CREATE TABLE x (
>      id integer DEFAULT nextval('"x_id_seq"'::text) NOT NULL,
>      name character varying(30) NOT NULL
>  );
>
>
>
>
>
>  Do you Yahoo!?
>  Yahoo! Tax Center - forms, calculators, tips, and more

Of course, a bigger question is why the ::text cast is needed at all.

---------------------------------------------------------------------------

Dennis Gearon wrote:
> Because that's the name of the sequence, not the value coming out of the sequence.
>
> 3/4/2003 10:54:34 PM, John Smith <john_smith_45678@yahoo.com> wrote:
>
> >
> >
> >  Date:   Tue, 4 Mar 2003 22:54:34 -0800 (PST)
> >
> >  From:   John Smith <john_smith_45678@yahoo.com>
> >  Subject:[GENERAL] nextval::text
> >  To:     pgsql-general@postgresql.org
> >
> >
> >
> >
> >  I was just wondering why in the generated schema nextval is cast to text
> >  rather than int?
> >
> >
> >  John
> >
> >  CREATE TABLE x (
> >      id integer DEFAULT nextval('"x_id_seq"'::text) NOT NULL,
> >      name character varying(30) NOT NULL
> >  );
> >
> >
> >
> >
> >
> >  Do you Yahoo!?
> >  Yahoo! Tax Center - forms, calculators, tips, and more
>
>
>
>
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