Re: Calculation of unused columns - Mailing list pgsql-performance

On Sat, 2009-10-17 at 21:41 -0400, Tom Lane wrote:

> one thing we'd have to consider
> is whether it is okay to suppress calculation of columns containing
> volatile functions.

I think we should have a 4th class of functions,
volatile-without-side-effects (better name needed, obviously).

That would allow us to optimize such calls away, if appropriate.

--
 Simon Riggs           www.2ndQuadrant.com