On Mon, 2009-01-12 at 14:42 +0800, Phoenix Kiula wrote:
> > ALTER COLUMN TYPE is intended for cases where actual transformation of
> > the data is involved. Obviously varchar(20) to varchar(35) doesn't
> > really require any per-row effort, but there's no operation in the
> > system that handles that case. But if you're brave, you can do it
> > via manipulation of the system catalogs. Observe:
>
> ...snip....
>
>
> Thanks Tom. Yes, no data change is required. But I don't think I have
> the understanding to try what you suggested. Running the alter table
> on my home database (almost same data) took an hour and it wasn't
> complete. I had even dropped the index. So I guess altering it that
> way is a pain in PGSQL. Bummer.
>
Actually, I did the same thing on a live database and it worked!