I don't know. But changing it now would cause trouble in many applications...
For our applications we reimplemented fuzzy query so that we can pass along a org.apache.lucene.search.spell.StringDistance instance that holds the similarity algorithm of choice. -- Sven -----Ursprüngliche Nachricht----- Von: Clemens Wyss [mailto:clemens...@mysign.ch] Gesendet: Dienstag, 3. Mai 2011 12:12 An: java-user@lucene.apache.org Betreff: AW: "fuzzy prefix" search Is this calculation intended or a bug? > -----Ursprüngliche Nachricht----- > Von: Biedermann,S.,Fa. Post Direkt [mailto:s.biederm...@postdirekt.de] > Gesendet: Dienstag, 3. Mai 2011 12:00 > An: java-user@lucene.apache.org > Betreff: AW: "fuzzy prefix" search > > I had a look into the 3.0 implementation > > The calculation of the similarity is > > 1 - (edit distance / min (string 1 length, string 2 length) > > As opposed to the levenstein in spellchecker > > 1 - (edit distance / max (string 1 length, string 2 length) > > > So, the similarity is 1 - ( 3 / min(3,6)) = 0. > > -- > Sven > > > -----Ursprüngliche Nachricht----- > Von: Biedermann,S.,Fa. Post Direkt [mailto:s.biederm...@postdirekt.de] > Gesendet: Dienstag, 3. Mai 2011 11:43 > An: java-user@lucene.apache.org > Betreff: AW: "fuzzy prefix" search > > Have you tried > > Query q = new FuzzyQuery( new Term( "test", "Mer" ), 0.499f); > > > Sven > > > -----Ursprüngliche Nachricht----- > Von: Clemens Wyss [mailto:clemens...@mysign.ch] > Gesendet: Dienstag, 3. Mai 2011 10:57 > An: java-user@lucene.apache.org > Betreff: AW: "fuzzy prefix" search > > Sorry for coming back to my issue. Can anybody explain why my "simple" unit > test below fails? Any hint/help appreciated. > > Directory directory = new RAMDirectory(); IndexWriter indexWriter = new > IndexWriter( directory, new StandardAnalyzer( Version.LUCENE_31 ), > IndexWriter.MaxFieldLength.UNLIMITED ); > Document document = new Document(); > document.add( new Field( "test", "Merlot", Field.Store.YES, > Field.Index.ANALYZED ) ); indexWriter.addDocument( document ); > IndexReader indexReader = indexWriter.getReader(); IndexSearcher > searcher = new IndexSearcher( indexReader ); Query q = new FuzzyQuery( > new Term( "test", "Mer" ), 0.5f, 0, 10 ); // or Query q = new FuzzyQuery( new > Term( "test", "Mer" ), 0.5f); TopDocs result = searcher.search( q, 10 ); > Assert.assertEquals( 1, result.totalHits ); > > - Clemens > > > -----Ursprüngliche Nachricht----- > > Von: Clemens Wyss [mailto:clemens...@mysign.ch] > > Gesendet: Montag, 2. Mai 2011 23:01 > > An: java-user@lucene.apache.org > > Betreff: AW: "fuzzy prefix" search > > > > Is it the combination of FuzzyQuery and Term which makes the search to > > go for "word boundaries"? > > > > > -----Ursprüngliche Nachricht----- > > > Von: Clemens Wyss [mailto:clemens...@mysign.ch] > > > Gesendet: Montag, 2. Mai 2011 14:13 > > > An: java-user@lucene.apache.org > > > Betreff: AW: "fuzzy prefix" search > > > > > > I tried this too, but unfortunately I only get hits when the search > > > term is a least as long as the word to be looked up. > > > > > > E.g.: > > > ... > > > Directory directory = new RAMDirectory(); IndexWriter indexWriter = > > > new IndexWriter( directory, IndexManager.getIndexingAnalyzer( > > LOCALE_DE ), > > > IndexWriter.MaxFieldLength.UNLIMITED ); > > > > > > Document document = new Document(); > > > document.add( new Field( "test", "Merlot", > > > Field.Store.YES, Field.Index.ANALYZED ) ); > > indexWriter.addDocument( > > > document ); > > > > > > IndexReader indexReader = indexWriter.getReader(); IndexSearcher > > > searcher = new IndexSearcher( indexReader ); > > > > > > Query q = new FuzzyQuery( new Term( "test", "Mer" ), 0.6f, 1 ); > > > TopDocs result = searcher.search( q, 10 ); Assert.assertEquals( 1, > > result.totalHits ); ... > > > > > > > -----Ursprüngliche Nachricht----- > > > > Von: Uwe Schindler [mailto:u...@thetaphi.de] > > > > Gesendet: Montag, 2. Mai 2011 13:50 > > > > An: java-user@lucene.apache.org > > > > Betreff: RE: "fuzzy prefix" search > > > > > > > > Hi, > > > > > > > > You can pass an integer to FuzzyQuery which defines the number of > > > > characters that are seen as prefix. So all terms must match this > > > > prefix and the rest of each term is matched using fuzzy. > > > > > > > > Uwe > > > > > > > > ----- > > > > Uwe Schindler > > > > H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de > > > > eMail: u...@thetaphi.de > > > > > > > > > -----Original Message----- > > > > > From: Clemens Wyss [mailto:clemens...@mysign.ch] > > > > > Sent: Monday, May 02, 2011 1:47 PM > > > > > To: java-user@lucene.apache.org > > > > > Subject: "fuzzy prefix" search > > > > > > > > > > I'd like to search fuzzily but not on a full term. > > > > > E.g. > > > > > I have a text "Merlot del Ticino" > > > > > I'd like > > > > > "mer", "merr", "melo", ... to match. > > > > > > > > > > If I use FuzzyQuery only "merlot, "merlott" hit. What > > > > > Query-combination should I use? > > > > > > > > > > Thx > > > > > Clemens > > > > > > > > > > > > > > > ---------------------------------------------------------------- > > > > > -- > > > > > -- > > > > > - 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 > > > > > > --------------------------------------------------------------------- > > 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 > > > --------------------------------------------------------------------- > 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
