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From "Uwe Schindler" <...@thetaphi.de>
Subject RE: Combining PrefixQuery and FuzzyQuery
Date Mon, 19 Apr 2010 15:13:03 GMT
Dont use PrefixQuery, only FuzzyQuery. There you pass in the whole term (with prefix) and define
how many characters are the prefix.

-----
Uwe Schindler
H.-H.-Meier-Allee 63, D-28213 Bremen
http://www.thetaphi.de
eMail: uwe@thetaphi.de


> -----Original Message-----
> From: Lukas Österreicher [mailto:lukas.oesterreicher@austria.real.com]
> Sent: Monday, April 19, 2010 5:00 PM
> To: java-user@lucene.apache.org
> Subject: Re: Combining PrefixQuery and FuzzyQuery
> 
> Well, how would this look like in code?
> Currently I have the prefix query like this:
> 
> BooleanQuery bQuery = new BooleanQuery();
> PrefixQuery prefixQuery = new PrefixQuery(new Term("item.name",
> termText));
> bQuery.add( prefixQuery, Occur.MUST);
> 
> I dont see any class named PrefixTerm.
> I'd appreciate it if you could show me how it is done in java code.
> 
> Lukas
> 
> Am 19.04.10 16:48 schrieb "Uwe Schindler" unter <uwe@thetaphi.de>:
> 
> > How about a fuzzy query with a prefix term? Its configureable.
> >
> > -----
> > Uwe Schindler
> > H.-H.-Meier-Allee 63, D-28213 Bremen
> > http://www.thetaphi.de
> > eMail: uwe@thetaphi.de
> >
> >
> >> -----Original Message-----
> >> From: Lukas Österreicher
> [mailto:lukas.oesterreicher@austria.real.com]
> >> Sent: Monday, April 19, 2010 4:43 PM
> >> To: java-user@lucene.apache.org
> >> Subject: Combining PrefixQuery and FuzzyQuery
> >>
> >> Hello.
> >>
> >> Is it possible to combine PrefixQuery and FuzzyQuery?
> >> The search on a term should both be fuzzy but also match with
> results
> >> that
> >> jut begin with that token (or an approximation of that token).
> >>
> >> If it is possible, can you give me an example on how to achieve
> this?
> >>
> >> Currently I only use the PrefixQuery and performance is ok.
> >> Would performance with such a combination be much worse?
> >>
> >> I would not even need a complete fuzzy search, it would suffice
> >> To have the matching be done without caring for cases (this I
> already
> >> have
> >> present by using a modified WhitespaceTokenizer which filters
> >> To lower cases) and with also matching characters where accents
> >> Also match, so e would match é and è.
> >>
> >> Finally, I would like to know how much sorting a string field
> >> Which is not too long (containing track or album title) affects
> >> performance
> >> Copared to not providing any sorting parameters.
> >>
> >> Thanx in advance,
> >> Lukas
> >
> >
> > ---------------------------------------------------------------------
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> > For additional commands, e-mail: java-user-help@lucene.apache.org
> >
> 
> 
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