From: | David Fetter <david(at)fetter(dot)org> |
---|---|
To: | "Marc G(dot) Fournier" <scrappy(at)postgresql(dot)org> |
Cc: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: ALTER TABLE ( smallinto -> boolean ) ... |
Date: | 2005-08-29 23:24:45 |
Message-ID: | 20050829232445.GE13074@fetter.org |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers pgsql-sql |
On Mon, Aug 29, 2005 at 08:15:41PM -0300, Marc G. Fournier wrote:
>
> I have a table with several 'smallint' fields that I'd like to convert to
> booleean ... the data in each is either 0 or 1, and:
>
> # select '1'::boolean;
> bool
> ------
> t
> (1 row)
> # select '0'::boolean;
> bool
> ------
> f
> (1 row)
>
> so they do cast as expected ... but, if I try to do the ALTER, I get:
>
> # ALTER TABLE table ALTER COLUMN field1 type boolean;
> ERROR: column "field1" cannot be cast to type "pg_catalog.bool"
> Should this not work? If not, is there a way to do it so that it will,
> without having to reload the whole table?
ALTER TABLE "table" ALTER COLUMN field1 TYPE boolean
USING CASE field1 WHEN 0 THEN false ELSE true END;
/* or something to this effect */
HTH :)
Cheers,
D
--
David Fetter david(at)fetter(dot)org http://fetter.org/
phone: +1 510 893 6100 mobile: +1 415 235 3778
Remember to vote!
From | Date | Subject | |
---|---|---|---|
Next Message | Rod Taylor | 2005-08-29 23:33:31 | Re: ALTER TABLE ( smallinto -> boolean ) ... |
Previous Message | Marc G. Fournier | 2005-08-29 23:15:41 | ALTER TABLE ( smallinto -> boolean ) ... |
From | Date | Subject | |
---|---|---|---|
Next Message | Rod Taylor | 2005-08-29 23:33:31 | Re: ALTER TABLE ( smallinto -> boolean ) ... |
Previous Message | Marc G. Fournier | 2005-08-29 23:15:41 | ALTER TABLE ( smallinto -> boolean ) ... |