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From: "Uwe Schindler" <uwe@thetaphi.de>
To: <java-user@lucene.apache.org>
References: <9a76536b0912210426x7ad12c4aub6457de5750c7221@mail.gmail.com>
 <8c4e68610912210751pd2f602fn71f2447b3ebeafc7@mail.gmail.com>
 <9a76536b0912220405i295390f2j94bbf482a957467f@mail.gmail.com>
Subject: RE: Lucene' results paging
Date: Tue, 22 Dec 2009 13:29:41 +0100
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Ist inside TopDocs class as a getter method.

-----
Uwe Schindler
H.-H.-Meier-Allee 63, D-28213 Bremen
http://www.thetaphi.de
eMail: uwe@thetaphi.de

> -----Original Message-----
> From: =E1=CE=D4=CF=CE =EB=C9=D2=C9=CC=CC=CF=D7 =
[mailto:antonv.kirillov@gmail.com]
> Sent: Tuesday, December 22, 2009 1:05 PM
> To: java-user@lucene.apache.org
> Subject: Re: Lucene' results paging
>=20
> Thanks for your answer. But how should I get the total nubmer of
> search results in this case?
>=20
> On Mon, Dec 21, 2009 at 6:51 PM, Ian Lea <ian.lea@gmail.com> wrote:
> > Hi
> >
> >
> > The standard approach to paging is just to do the search again and
> > pick out the docs you want, along the lines you outline. =9AYou =
cannot
> > pass start/end info to any search methods.
> >
> > When you set max doc to, say, 10, lucene will find the 10 highest
> > scoring docs and return them. =9AThere is no point in passing a =
number
> > higher than you need. =9ASo if you are displaying 10 hits per page, =
call
> > search(query, 10) for the first page, ..., 20 for the second and =
pick
> > out the last 10, and so on.
> >
> > An alternative approach is for you to cache the search results
> > yourself. =9AThat way you can avoid any subsequent searches. =9ABut =
that
> > has it's own overhead and complexity, and most people most of the =
time
> > don't get much past the first page.
> >
> >
> > http://wiki.apache.org/lucene-
> =
java/LuceneFAQ#How_do_I_implement_paging.2C_i.e._showing_result_from_1-
> 10.2C_11-20_etc.3F
> >
> > --
> > Ian.
> >
> >
> > On Mon, Dec 21, 2009 at 12:26 PM, =E1=CE=D4=CF=CE =
=EB=C9=D2=C9=CC=CC=CF=D7
> > <antonv.kirillov@gmail.com> wrote:
> >> Hi, All! I have some problems with Lucene's search process and it's
> >> results, so I hope You could help me.
> >>
> >> First one: how should I split results by pages? Now I get search
> >> results in such way:
> >>
> >> TopDocs topDocs =3D is.search(finalQuery, 100000) //For example
> >>
> >> and after that I get the needed results in such way:
> >>
> >> //for example startPage =3D 20, endPage =3D 40
> >> for(int j=3DstartPage; j<stopPage; j++){
> >>
> >> doc[j-startPage] =3D is.doc(topDocs.scoreDocs[j].doc);
> >> }
> >>
> >> I think this is a bad approach. How should I optimize my code to =
make
> >> search faster? Is there any possibility to set start and stop pages =
in
> >> search methods?
> >>
> >> The second one:
> >> After the search is completed and the results are not sorted are =
all
> >> the results stored in search engine? I mean when I set the max =
number
> >> of docs in method search(finalQuery, 10) equal 10. would Lucene =
find
> >> all relevant docs, then sort them by relevance and select first ten
> >> after that? Or does Lucene store some specific information in =
indices
> >> which allows select first 10 most relevant docs without sorting all
> >> million (for example) relevant pages?
> >>
> >> Thanks in advance.
> >> --
> >> Anton Kirillov
> >>
> >> =
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> >> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> >> For additional commands, e-mail: java-user-help@lucene.apache.org
> >>
> >>
> >
> > =
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> >
> >
>=20
>=20
>=20
> --
> =F3 =D5=D7=C1=D6=C5=CE=C9=C5=CD, =EB=C9=D2=C9=CC=CC=CF=D7 =
=E1=CE=D4=CF=CE
>=20
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