On Mon, Mar 16, 2009 at 11:36 AM, Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com>wrote:
> On Sun, Mar 15, 2009 at 9:00 PM, leopay <leopay(at)gmail(dot)com> wrote:
> > I wanna if there is any defact when use null column in pg,
> > e.g. performance issue
>
> none that I know of. Any more specific scenarios you're wondering about?
when do the query, the column contain none value could use the index?