The more documents match, the slower the search; how long your
particular search would take I cannot tell, though - you should just
test it out and see.
I never needed to use the trick with a flag field in all documents, but
I know others do it.
Otis
--- Avi Drissman <[EMAIL PROTECTED]> wrote:
> On Aug 25, 2004, at 11:39 AM, Bernhard Messer wrote:
>
> > If you already store the date time when the doc was index, you
> could
> > use the following trick to get the last document added to the
> index:
> >
> > while (--maxDoc > 0) {
>
> Yes, but that's a linear search :(
>
> On Aug 25, 2004, at 11:25 AM, Otis Gospodnetic wrote:
>
> > What if all Documents in your index contained some flag field + an
> 'add
> > date' field. Then you could make a query such as: flag:1 and sort
> it
> > by 'add date' field, taking only the very first hit as the most
> > recently added Document.
>
> That's a very clever approach. I'm currently using Lucene 1.3, so I
> hadn't thought about using the new sorting abilities. I'd need to
> move
> to 1.4, of course.
>
> A question, though: how efficient is it to make a query that matches
> all documents and then sort it? I'm looking for something as small as
> I
> can; after all, storing the last date in a file separate from the
> index
> is O(1)...
>
> Thanks!
>
> Avi
>
> --
> Avi 'rlwimi' Drissman
> [EMAIL PROTECTED]
> Argh! This darn mail server is trunca
>
>
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