Mailing-List: contact java-user-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: java-user@lucene.apache.org
Received-SPF: neutral (athena.apache.org: local policy)
From: "Uwe Schindler" <uwe@thetaphi.de>
To: <java-user@lucene.apache.org>
References: <27348933.post@talk.nabble.com>
 <359a92831001271815y532f5007le8b89845a5d7f8e1@mail.gmail.com>
 <3b23ce091001272051g2ef79c7fsde1e835955b1dcad@mail.gmail.com>,<27406592.post@talk.nabble.com>
 <BLU140-W13CC0DF0E167ED77FB01FBD0580@phx.gbl>
In-Reply-To: <BLU140-W13CC0DF0E167ED77FB01FBD0580@phx.gbl>
Subject: RE: During the wild card search,
 will lucene 2.9.0 to convert the search string to lower case?
Date: Mon, 1 Feb 2010 17:41:08 +0100
Message-ID: <000c01caa35d$5b071fc0$11155f40$@de>
MIME-Version: 1.0
Content-Type: text/plain;
	charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
Thread-Index: AcqjW22f/h1Uj1Z7QI67PqyBv1BkjwAAdHtg
Content-Language: de

Only query parser does the lower casing. For such a special case, I =
would suggest to use a PrefixQuery or WildcardQuery directly and not use =
query parser.

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

> -----Original Message-----
> From: java8964 java8964 [mailto:java8964@hotmail.com]
> Sent: Monday, February 01, 2010 5:27 PM
> To: java-user@lucene.apache.org
> Subject: During the wild card search, will lucene 2.9.0 to convert the
> search string to lower case?
>=20
>=20
> I noticed a strange result from the following test case. For wildcard
> search, my understanding is that lucene will NOT use any analyzer on
> the query string. But as the following simple code to show, it looks
> like that lucene will lower case the search query in the wildcard
> search. Why? If not, why the following test case show the search hits
> as one for lower case wildcard search, but not for the upper case =
data?
> My original data is NOT analyzed, so they should be stored as the
> original data in the index segment, right?
>=20
> Lucene version: 2.9.0
>=20
> JDK version: JDK 1.6.0_17
>=20
>=20
> public class IndexTest1 {
>     public static void main(String[] args) {
>         try {
>             Directory directory =3D new RAMDirectory();
>             IndexWriter writer =3D new IndexWriter(directory, new
> StandardAnalyzer(Version.LUCENE_CURRENT),
> IndexWriter.MaxFieldLength.UNLIMITED);
>             Document doc =3D new Document();
>             doc.add(new Field("title", "BBB CCC", Field.Store.YES,
> Field.Index.NOT_ANALYZED));
>             writer.addDocument(doc);
>             doc =3D new Document();
>             doc.add(new Field("title", "ddd eee", Field.Store.YES,
> Field.Index.NOT_ANALYZED));
>             writer.addDocument(doc);
>=20
>             writer.close();
>=20
>             IndexSearcher searcher =3D new IndexSearcher(directory,
> true);
>             PerFieldAnalyzerWrapper wrapper =3D new
> PerFieldAnalyzerWrapper(new StandardAnalyzer(Version.LUCENE_CURRENT));
>             wrapper.addAnalyzer("title", new KeywordAnalyzer());
>             Query query =3D new QueryParser("title",
>                     wrapper).parse("title:BBB*");
>             System.out.println("hits of title =3D " +
> searcher.search(query, 100).totalHits);
>             query =3D new QueryParser("title",
>                     wrapper).parse("title:ddd*");
>             System.out.println("hits of title =3D " +
> searcher.search(query, 100).totalHits);
>             searcher.close();
>         } catch (Exception e) {
>             System.out.println(e);
>         }
>     }
> }
>=20
> The output:
> hits of title =3D 0
> hits of title =3D 1
>=20
>=20
> _________________________________________________________________
> Hotmail: Trusted email with powerful SPAM protection.
> http://clk.atdmt.com/GBL/go/201469227/direct/01/


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