Thanks for your reply, Mark.
This was my original code for constructing my query using FuzzyQuery:
BooleanQuery query = new BooleanQuery();
if (artist.length() > 0) {
FuzzyQuery artist_query = new FuzzyQuery(new Term("artist",
artist));
query.add(artist_query, BooleanClause.Occur.MUST);
}
if (song.length() > 0) {
FuzzyQuery song_query = new FuzzyQuery(new Term("song", song));
query.add(song_query, BooleanClause.Occur.MUST);
}
This is my first attempt to use FuzzyLikeThisQuery (with no success):
FuzzyLikeThisQuery query = new FuzzyLikeThisQuery(2, new
SimpleAnalyzer());
if (artist.length() > 0) {
query.addTerms(artist, "artist", 0.5f, 0);
}
if (song.length() > 0) {
query.addTerms(song, "song", 0.5f, 0);
}
This is my second attempt to use FuzzyLikeThisQuery (with no success):
BooleanQuery query = new BooleanQuery();
if (artist.length() > 0) {
FuzzyLikeThisQuery artist_query = new FuzzyLikeThisQuery(1, new
SimpleAnalyzer());
artist_query.addTerms(artist, "artist", 0.5f, 0);
query.add(artist_query, BooleanClause.Occur.MUST);
}
if (song.length() > 0) {
FuzzyLikeThisQuery song_query = new FuzzyLikeThisQuery(1, new
SimpleAnalyzer());
song_query.addTerms(song, "song", 0.5f, 0);
query.add(song_query, BooleanClause.Occur.MUST);
}
I think it's my lack of undersanding of the usage of FuzzyLikeThisQuery
that makes me getting irrelevant results.
Could you tell me what's wrong here, please?
Thank you.
On Mon, 2008-06-23 at 11:28 +0000, mark harwood wrote:
> >>I do have serious problems with the relevance of the results with fuzzy
> >>queries.
>
> Please take the time to read my response here:
>
> http://www.gossamer-threads.com/lists/lucene/java-user/62050#62050
>
> I had a work colleague come up with exactly the same problem this week and
> the solution is the same.
>
> Just tested my index with a standard Lucene FuzzyQuery for "Paul~" - this
> gives "Phul", "Saul", and "Paulo" before ANY "Paul" records due to IDF issues.
> Using FuzzyLikeThisQuery puts all the "Paul" records ahead of the variants.
>
>
>
> ----- Original Message ----
> From: László Monda <[EMAIL PROTECTED]>
> To: java-user@lucene.apache.org
> Cc: [EMAIL PROTECTED]
> Sent: Monday, 23 June, 2008 12:10:05 PM
> Subject: Re: Getting irrelevant results using fuzzy query
>
> On Wed, 2008-06-18 at 21:10 +0200, Daniel Naber wrote:
> > On Mittwoch, 18. Juni 2008, László Monda wrote:
> >
> > > Additional info: Lucene seems to do the right thing when only few
> > > documents are present, but goes crazy when there is about 1.5 million
> > > documents in the index.
> >
> > Lucene works well with more documents (currently using it with 9 million).
> > but the fuzzy query requires iteration over all terms which makes this
> > query slow. This can be avoid by setting the prefixLength parameter of the
> > FuzzyQuery constructor to 1 or 2. Or maybe you should use an n-gram index,
> > see the spellchecker in the contrib area.
>
> Thanks for the suggestion, but I don't have any performance problems
> yet, but I do have serious problems with the relevance of the results
> with fuzzy queries.
>
--
Laci <http://monda.hu>
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