I still don't understand why a simple sort as suggested by Ian wouldn't work. It'd be a lot more reliable than fiddling with doc scores if you want a strict ordering on a particular field (make sure it's untokenized though).
Erick On Mon, Feb 22, 2010 at 8:19 AM, pdaures <patrick.dau...@gmail.com> wrote: > > It WORKS ! > > Thank you so much, I spent a lot of time trying to do that, thank you again > ! > > > Uwe Schindler wrote: > > > > The simple fix for that is to wrap the subQuery using: new > > ConstantScoreQuery(new QueryWrapperFilter(query)) - after that its score > > is constant and the ValueSource only scores. > > > > I recommend to use NumericField for indexing this boost (no storing > > needed, only indexing, precisionStep=Integer.MAX_VALUE). Else (if using > > standard Field) the boost field does not need to be "stored", it must be > > indexed as NOT_ANALYZED. > > > > ----- > > Uwe Schindler > > H.-H.-Meier-Allee 63, D-28213 Bremen > > http://www.thetaphi.de > > eMail: u...@thetaphi.de > > > > > >> -----Original Message----- > >> From: Ian Lea [mailto:ian....@gmail.com] > >> Sent: Monday, February 22, 2010 12:26 PM > >> To: java-user@lucene.apache.org > >> Subject: Re: Boost Problem (again), need example ! > >> > >> boostField needs to be indexed to be used in the FieldScoreQuery. > >> > >> Are you now using one of the the latest releases that Uwe mentioned, > >> with fixes for CustomScoreQuery? > >> > >> And unless you provide your own implementation of > >> CustomScoreQuery.customScore() I think that you are still not > >> guaranteed to get what you want since the default implementation is to > >> calculate the score as subQueryScore * valSrcScore. > >> > >> > >> -- > >> Ian. > >> > >> > >> On Mon, Feb 22, 2010 at 11:00 AM, pdaures <patrick.dau...@gmail.com> > >> wrote: > >> > > >> > HI ! > >> > Thank you for your help. > >> > I think I don't use CustomScoreQuery correctly when I do a "search". > >> > > >> > BooleanQuery combinedQuery = new BooleanQuery(); > >> > combinedQuery.add(textQuery, Occur.MUST); > >> > combinedQuery.add(titleQuery, Occur.MUST); > >> > > >> > CustomScoreQuery customQuery = new CustomScoreQuery(combinedQuery,new > >> > FieldScoreQuery(BOOST_FIELD,Type.INT)); > >> > > >> > indexSearcher.search(..., customQuery, ....). > >> > > >> > in order to index the BOOST_FIELD, I do that : > >> > Field boostField = new Field(BOOST_FIELD, Integer.toString(boost), > >> > Field.Store.YES, Field.Index.ANALYZED.NO); > >> > > >> > > >> > Is that correct ? > >> > Thank you > >> > > >> > > >> > > >> > > >> > Uwe Schindler wrote: > >> >> > >> >> It's CustomScoreQuery in 2.9 and 3.0. > >> >> > >> >> Please wait for 2.9.2 and 3.0.1 for an important API change in this > >> >> experimental query type to work correct with the new per-segment- > >> search! > >> >> You can test the release artifacts of both new versions here: > >> >> http://people.apache.org/~uschindler/staging-area/lucene-292-301- > >> take2-rev912433/ > >> >> > >> >> With e.g. ValueSourceQuery you can score your documents using a > >> separate > >> >> numeric field from your documents (it uses FieldCache). > >> >> > >> >> Uwe > >> >> > >> >> ----- > >> >> Uwe Schindler > >> >> H.-H.-Meier-Allee 63, D-28213 Bremen > >> >> http://www.thetaphi.de > >> >> eMail: u...@thetaphi.de > >> >> > >> >>> -----Original Message----- > >> >>> From: Ian Lea [mailto:ian....@gmail.com] > >> >>> Sent: Monday, February 22, 2010 10:33 AM > >> >>> To: java-user@lucene.apache.org > >> >>> Subject: Re: Boost Problem (again), need example ! > >> >>> > >> >>> Can't you simply sort by descending score (your score, not > >> lucene's)? > >> >>> Seems to me that would give you what you are asking for. > >> >>> > >> >>> The setBoost() method is unlikely to work consistently because it > >> only > >> >>> infuences the score rather than setting it. If your John Mickeal > >> doc > >> >>> happens to have a higher lucene score, because of the normal > >> >>> idf/tf/etc stuff, then the setBoost() with a higher value for John > >> >>> Smith may well not be enough to force John Smith to the top. > >> >>> > >> >>> I don't know enough about function queries to help you much there > >> but > >> >>> FieldScoreQuery might work. I can't see any sign of class > >> >>> FunctionQuery in the 3.0.0 core package so am not clear what that > >> is. > >> >>> > >> >>> > >> >>> -- > >> >>> Ian. > >> >>> > >> >>> > >> >>> > >> >>> On Mon, Feb 22, 2010 at 8:54 AM, pdaures <patrick.dau...@gmail.com> > >> >>> wrote: > >> >>> > > >> >>> > Hi, > >> >>> > I know that there are many topics about scoring issues, but I > >> didn't > >> >>> find an > >> >>> > answer in the topics. > >> >>> > This is the problem : > >> >>> > Imagine I'm a teacher, and I have to index all the results, > >> comments > >> >>> and > >> >>> > score about students. > >> >>> > > >> >>> > Student : > >> >>> > String name (eg : John Smith) > >> >>> > String comments : (eg: John is a good student, but he needs to be > >> >>> more self > >> >>> > confident bla bla bla) > >> >>> > float score (eg : 98) > >> >>> > > >> >>> > I have to index all the students and when I use the search class, > >> I > >> >>> want to > >> >>> > get first the best students. So, if John Smith is a better > >> student > >> >>> than John > >> >>> > Mickael, when I search "John" I want to have John Smith BEFORE > >> John > >> >>> Mickeal. > >> >>> > > >> >>> > To do that, I'm using BooleanQuery to search in name and comment > >> >>> fields. > >> >>> > > >> >>> > First, I thought I could use the function Document.setBoost(float > >> >>> boost) > >> >>> > while indexing student, with boost = Student.score. But the > >> result > >> >>> was not > >> >>> > what I was expected, it didn't work correctly. > >> >>> > > >> >>> > Then I thought I could use a FunctionQuery to search : > >> >>> > FunctionQuery functionQuery = new FunctionQuery(new > >> >>> > ReverseOrdFieldSource("score")); > >> >>> > But the result was still incorrect. > >> >>> > > >> >>> > I don't know what I'm doing wrong. Could you help me to find a > >> >>> solution ? > >> >>> > Thank you :) > >> >>> > -- > >> >>> > View this message in context: http://old.nabble.com/Boost- > >> Problem- > >> >>> %28again%29%2C-need-example-%21-tp27684388p27684388.html > >> >>> > Sent from the Lucene - Java Users mailing list archive at > >> Nabble.com. > >> >>> > > >> >>> > > >> >>> > ----------------------------------------------------------------- > >> ---- > >> >>> > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > >> >>> > For additional commands, e-mail: java-user-h...@lucene.apache.org > >> >>> > > >> >>> > > >> >>> > >> >>> ------------------------------------------------------------------- > >> -- > >> >>> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > >> >>> For additional commands, e-mail: java-user-h...@lucene.apache.org > >> >> > >> >> > >> >> > >> >> -------------------------------------------------------------------- > >> - > >> >> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > >> >> For additional commands, e-mail: java-user-h...@lucene.apache.org > >> >> > >> >> > >> >> > >> > > >> > -- > >> > View this message in context: http://old.nabble.com/Boost-Problem- > >> %28again%29%2C-need-example-%21-tp27684388p27685594.html > >> > Sent from the Lucene - Java Users mailing list archive at Nabble.com. > >> > > >> > > >> > --------------------------------------------------------------------- > >> > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > >> > For additional commands, e-mail: java-user-h...@lucene.apache.org > >> > > >> > > >> > >> --------------------------------------------------------------------- > >> To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > >> For additional commands, e-mail: java-user-h...@lucene.apache.org > > > > > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > > For additional commands, e-mail: java-user-h...@lucene.apache.org > > > > > > > > -- > View this message in context: > http://old.nabble.com/Boost-Problem-%28again%29%2C-need-example-%21-tp27684388p27687065.html > Sent from the Lucene - Java Users mailing list archive at Nabble.com. > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > For additional commands, e-mail: java-user-h...@lucene.apache.org > >
