On tor, 2009-12-03 at 10:09 -0500, Tom Lane wrote:
> Alvaro Herrera <alvherre@commandprompt.com> writes:
> > Should we recast the attributes and columns views in information_schema?
> > I notice they still use attnum.
>
> I'd vote against it, at least until we have something better than a
> row_number solution. That would create another huge performance penalty
> on views that are already ungodly slow.
Should be easy to test the performance impact of this, since the limit
for columns per table is 1600.