Re: changing varchar limits

Stephan Szabo wrote:
> On Thu, 1 Aug 2002, Jeff Davis wrote:
>
>
>>What's the easiest way to change the allowable length of a varchar attribute?
>>
>>I looked in pg_attribute and noticed that the allowable length of the varchar
>>(+4 bytes for the actual length, presumably) was the atttypemod attribute of
>>the pg_attribute relation. Is it safe to change that? I would of course need
>>to be a superuser.
>
>
> That should be safe to change.  If you're lowering it, you should make
> sure the data fits.

To easily change a column from nullable to not-nullable, is flipping the
proper attribute all that's required?  Just asking, cause it would be
very useful until there's an ALTER TABLE equivalent (in 7.3?).

Thanks,
Kevin