Re: ALTER TABLE ( smallinto -> boolean ) ...

"Marc G. Fournier" <scrappy@postgresql.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.
        regards, tom lane