Re: Create an index with a sort condition

On Mon, Apr 03, 2006 at 12:48:22PM -0400, Jim Nasby wrote:
> I believe he's talking about something like
>
> CREATE INDEX books__id_title ON books(id_book, title DESC);
>
> which of course we don't support. But you can define a custom set of
> operators that work backwards and use those to define the index, and
> then use them in the ORDER BY.
>
> BTW, is there a TODO for this? Second request for it I've seen in a
> week...

Well, if COLLATE support ever gets done, it'll fix this too and be SQL
compliant to boot. Unfortunatly I havn't had much time to work on this
recently and there hasn't been much interest externally. Last time I
was bogged down by keeping up with the number of commits to the sort
code which is ofcourse intimately related to this.

One day...
--
Martijn van Oosterhout   <kleptog@svana.org>   http://svana.org/kleptog/
> Patent. n. Genius is 5% inspiration and 95% perspiration. A patent is a
> tool for doing 5% of the work and then sitting around waiting for someone
> else to do the other 95% so you can sue them.