This also bypasses the built in postgresql boolean literal parsing.
I think casting from text to boolean should be possible, and use the
same algorithm that's used when casting from "unknown" to boolean.
Markus
В Птн, 03/06/2005 в 21:14 +0900, Michael Glaesemann пишет:
> On Jun 3, 2005, at 8:52 PM, Markus Bertheau ☭ wrote:
>
> > And I can't call it with a TEXT variable, because casting from TEXT to
> > BOOLEAN isn't possible.
>
>
> I'd be surprised if there weren't a some way to coerce the cast from
> text to boolean, but you might want to just make a simple convenience
> function in the interim:
>
> test=# create or replace function text2bool (text)
> returns boolean language sql as $$
> select case
> when lower($1) = 'true'
> then true
> else false
> end;
> $$;
> CREATE FUNCTION
>
> test=# select text2bool('true');
> text2bool
> -----------
> t
> (1 row)
>
> test=# select text2bool('false');
> text2bool
> -----------
> f
> (1 row)
>
>
> Just an idea.
>
> Michael Glaesemann
> grzm myrealbox com
--
Markus Bertheau ☭ <twanger@bluetwanger.de>