Mailing-List: contact java-user-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: java-user@lucene.apache.org
Received-SPF: pass (athena.apache.org: domain of ian.lea@gmail.com designates
 209.85.214.176 as permitted sender)
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:in-reply-to:references:from:date:message-id:subject:to
         :content-type:content-transfer-encoding;
        b=KFynYonGlQgz93ApwXo5xIZ3fRh7GTWe3QA/HDmmVbLZYo7+bxbW4qWMKpKSkUXpem
         B+6Xu8r9WnWarbtYLvIg7BjNX2+tAs2f6k6353mcq/m+pFzak0YupgdQKo28S4MT7KcA
         BOts5+5HTGa2vCTdOlo4trAIUKHZskYgrANbo=
MIME-Version: 1.0
In-Reply-To: 
 <E594BA962D832C49A3CF858DAA3A696C1135A51C5E@Exchange2007.mysigndomain.corp>
References: 
 <E594BA962D832C49A3CF858DAA3A696C1135A51B79@Exchange2007.mysigndomain.corp>
 <000001cc08bf$19583a50$4c08aef0$@thetaphi.de>
 <E594BA962D832C49A3CF858DAA3A696C1135A51B7E@Exchange2007.mysigndomain.corp>
 <E594BA962D832C49A3CF858DAA3A696C1135A51BE9@Exchange2007.mysigndomain.corp>
 <E594BA962D832C49A3CF858DAA3A696C1135A51C53@Exchange2007.mysigndomain.corp>
 <BANLkTimKfPiM0TnGM_ehJK_BtHcwH5TukA@mail.gmail.com>
 <E594BA962D832C49A3CF858DAA3A696C1135A51C5E@Exchange2007.mysigndomain.corp>
From: Ian Lea <ian.lea@gmail.com>
Date: Tue, 3 May 2011 10:21:33 +0100
Message-ID: <BANLkTinanf_EJprt6rqvuvrCbr8exnPObg@mail.gmail.com>
Subject: Re: "fuzzy prefix" search
To: java-user@lucene.apache.org
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

I'd assumed that FuzzyQuery wouldn't ignore case but I could be wrong.
 What would be the edit distance between "mer" and "merlot"? Would it
be less that 1.5 which I reckon would be the value of length(term)*0.5
as detailed in the javadocs?  Seems unlikely, but I don't really know
anything about the Levenshtein (edit distance) algorithm as used by
FuzzyQuery.  Wouldn't a PrefixQuery be more appropriate here?


--
Ian.

On Tue, May 3, 2011 at 10:10 AM, Clemens Wyss <clemensdev@mysign.ch> wrote:
> Unfortunately lowercasing doesn't help.
> Also, doesn't the FuzzyQuery ignore casing?
>
>> -----Urspr=FCngliche Nachricht-----
>> Von: Ian Lea [mailto:ian.lea@gmail.com]
>> Gesendet: Dienstag, 3. Mai 2011 11:06
>> An: java-user@lucene.apache.org
>> Betreff: Re: "fuzzy prefix" search
>>
>> Mer !=3D mer. =A0The latter will be what is indexed because StandardAnal=
yzer
>> calls LowerCaseFilter.
>>
>> --
>> Ian.
>>
>>
>> On Tue, May 3, 2011 at 9:56 AM, Clemens Wyss <clemensdev@mysign.ch>
>> wrote:
>> > Sorry for coming back to my issue. Can anybody explain why my "simple"
>> unit test below fails? Any hint/help appreciated.
>> >
>> > Directory directory =3D new RAMDirectory(); IndexWriter indexWriter =
=3D
>> > new IndexWriter( directory, new StandardAnalyzer( Version.LUCENE_31 ),
>> > IndexWriter.MaxFieldLength.UNLIMITED ); Document document =3D new
>> > Document(); document.add( new Field( "test", "Merlot",
>> > Field.Store.YES, Field.Index.ANALYZED ) ); indexWriter.addDocument(
>> > document ); IndexReader indexReader =3D indexWriter.getReader();
>> > IndexSearcher searcher =3D new IndexSearcher( indexReader ); Query q =
=3D
>> > new FuzzyQuery( new Term( "test", "Mer" ), 0.5f, 0, 10 ); // or Query
>> > q =3D new FuzzyQuery( new Term( "test", "Mer" ), 0.5f); TopDocs result=
 =3D
>> > searcher.search( q, 10 ); Assert.assertEquals( 1, result.totalHits );
>> >
>> > - Clemens
>> >
>> >> -----Urspr=FCngliche Nachricht-----
>> >> Von: Clemens Wyss [mailto:clemensdev@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"?
>> >>
>> >> > -----Urspr=FCngliche Nachricht-----
>> >> > Von: Clemens Wyss [mailto:clemensdev@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 =3D new RAMDirectory(); IndexWriter indexWriter=
 =3D
>> >> > new IndexWriter( directory, IndexManager.getIndexingAnalyzer(
>> >> LOCALE_DE ),
>> >> > =A0 =A0 =A0 =A0 =A0 =A0 IndexWriter.MaxFieldLength.UNLIMITED );
>> >> >
>> >> > Document document =3D new Document(); document.add( new Field(
>> >> > "test", "Merlot",
>> >> > =A0 =A0 =A0 =A0 =A0 =A0 Field.Store.YES, Field.Index.ANALYZED ) );
>> >> indexWriter.addDocument(
>> >> > document );
>> >> >
>> >> > IndexReader indexReader =3D indexWriter.getReader(); IndexSearcher
>> >> > searcher =3D new IndexSearcher( indexReader );
>> >> >
>> >> > Query q =3D new FuzzyQuery( new Term( "test", "Mer" ), 0.6f, 1 );
>> >> > TopDocs result =3D searcher.search( q, 10 ); Assert.assertEquals( 1=
,
>> >> result.totalHits ); ...
>> >> >
>> >> > > -----Urspr=FCngliche Nachricht-----
>> >> > > Von: Uwe Schindler [mailto:uwe@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: uwe@thetaphi.de
>> >> > >
>> >> > > > -----Original Message-----
>> >> > > > From: Clemens Wyss [mailto:clemensdev@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, =A0"merlott" hit. What
>> >> > > > Query-combination should I use?
>> >> > > >
>> >> > > > Thx
>> >> > > > Clemens
>> >> > > >
>> >> > > >
>> >> > > > ---------------------------------------------------------------
>> >> > > > ---
>> >> > > > --
>> >> > > > - To unsubscribe, e-mail:
>> >> > > > java-user-unsubscribe@lucene.apache.org
>> >> > > > For additional commands, e-mail:
>> >> > > > java-user-help@lucene.apache.org
>> >> > >
>> >> > >
>> >> > >
>> >> > > -----------------------------------------------------------------
>> >> > > ---
>> >> > > - To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>> >> > > For additional commands, e-mail: java-user-help@lucene.apache.org
>> >> >
>> >> >
>> >> > -------------------------------------------------------------------
>> >> > -- To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>> >> > For additional commands, e-mail: java-user-help@lucene.apache.org
>> >>
>> >>
>> >> ---------------------------------------------------------------------
>> >> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>> >> For additional commands, e-mail: java-user-help@lucene.apache.org
>> >
>> >
>> > ---------------------------------------------------------------------
>> > To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>> > For additional commands, e-mail: java-user-help@lucene.apache.org
>> >
>> >
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>> For additional commands, e-mail: java-user-help@lucene.apache.org
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>
>

---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-user-help@lucene.apache.org