Re: [HACKERS] ALTER TABLE ( smallinto -> boolean ) ...

Moved off of -hackers, since its long gotten out of that realm :)

On Thu, 1 Sep 2005, Tom Lane wrote:

> "Marc G. Fournier" <scrappy(at)postgresql(dot)org> writes:
>> On Mon, 29 Aug 2005, Tom Lane wrote:
>>> No, because there's no built-in cast from smallint to bool.
>
>> 'k, I just took a read through the "CREATE CAST" man page, and don't think
>> I can use that for this,
>
> Sure you can. Make a SQL or PLPGSQL function that does the conversion
> you want and then create a cast using it.

Ah, okay, I just re-read the man page and think I stumbled upon what I
overlooked the first time ...

all I want to do is:

CREATE CAST ( 0 AS boolean )
WITH FUNCTION <I have to create this>
AS ASSIGNMENT;

And then each time I try to insert a '0' into a BOOLEAN field, it will
auto convert that (based on my function) to 'f' ...

And I'd need to do a second one for 1 -> 't' ...

Am I reading it right this time ... ?

----
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