Re: Convincing STABLE functions to run once

On 09 Sep 2014, at 17:23, Dan Wells <dbw2(at)calvin(dot)edu> wrote:

> I often have functions which are not truly immutable (they do something minor, like read in configuration information), but the functions themselves are fairly expensive, so I want them to run just once per query. At face value, I feel like STABLE should do what I want, but often it does not.

Assuming that the part that makes these functions expensive is not the reading of the configuration information, perhaps you can split your functions such that the expensive part goes into an IMMUTABLE function that takes those (STABLE) configuration values as input?

Alban Hertroys
--
If you can't see the forest for the trees,
cut the trees and you'll find there is no forest.