Re: Indexing timestamps

On Thu, 6 Jun 2002, Josh Berkus wrote:

>
> Stephan,
>
> > Unfortunately you can't do that in that sort of syntax. You'll
> > need to create a function that returns the month and is marked
> > as iscachable and use that function in the index creation and
> > query.
>
> Hmmm. I take it that NOW() is not ISCACHABLE, and that's Andre's indexing
> problem? What would be the pitfall of creating an alternate version of
> NOW() that ISCACHABLE?

I believe it was not marked as iscachable. I think it's now marked as
static in dev sources which I would guess would mean that it could
consider an index scan. I think with care an iscachable function that
just called now() would probably be safe for interactive queries.