Re: ADD/DROP INHERITS

On Thu, Jun 08, 2006 at 11:42:49AM -0400, Greg Stark wrote:
> > > It was awfully annoying for users when that feature was missing.
> > > Any non-linearities in the user interface like this
> > > end up being surprises and annoyances for users.
> >
> > I would be *really*, *really*, *really* annoyed if an op that I expected
> > to take less than 1 sec takes 5 hours and then forces me to spend
> > another 10 hours on VACUUM FULL+REINDEX or CLUSTER to get performance
> > back.
>
> I forget whether the developer managed to get it working without doing any
> table rewriting. In theory the table just needs to know that records that are
> "missing" that column in the null bitmap should behave as if they have the
> default value. But I seem to recall some headaches with that approach.

What happens if you

ALTER TABLE ... ADD new_column int DEFAULT 1;
ALTER TABLE ... ALTER new_column SET DEFAULT 2;
--
Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
vcard: http://jim.nasby.net/pervasive.vcf cell: 512-569-9461