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
