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From "Edward W. Rouse" <ero...@comsquared.com>
Subject RE: short search terms
Date Thu, 27 Sep 2012 13:36:28 GMT
You misread what I wrote. When it's ABC in the index and I search for ABC I
get no match. But AFTER I change ABC to ABCD and search for ABCD, I get a
match.

> -----Original Message-----
> From: Aditya [mailto:findbestopensource@gmail.com]
> Sent: Thursday, September 27, 2012 5:19 AM
> To: java-user@lucene.apache.org
> Subject: Re: short search terms
> 
> Hi
> 
> You are searching with 3 characters but the items actually indexed has
> 4
> characters. Use Luke and analyze the index.
> 
> If searching for ABC has to be matched with ABCD then you need to do a
> wildcard search. Add * at the end of the search query (ABC*).
> 
> Regards
> Aditya
> www.findbestopensource.com
> 
> 
> On Thu, Sep 27, 2012 at 3:05 AM, Edward W. Rouse
> <erouse@comsquared.com>wrote:
> 
> > I have an index and one of the items to search for is an identifier
> that
> > will always be 3 characters, like ABC or XYZ. If I do a search for
> ABC I
> > get
> > no matches. If I add 1 more character so that ABC becomes ABCD and
> search
> > for ABCD, it matches. I have been looking through the code (I
> inherited and
> > the original coder is no longer with the company) to see if there is
> any
> > place where he might have put a limitation in, but testing indicates
> that
> > it
> > is creating a query. Some code below:
> >
> > QueryParser parser = new QueryParser(Version.LUCENE_34,
> > TaskRecord.BaseFields.PUBLIC_DEFAULT_FIELD.getName(), getAnalyzer());
> > parser.setDefaultOperator(Operator.AND);
> > Query query = parser.parse(qstring);
> >
> > qstring is the search text and getAnalyser returns a
> StandardAnalyzer.
> >
> > The Query is then used to search using the following code:
> >
> >   public List<Long> search(Query query) throws IOException
> >   {
> >     IndexReader reader = null;
> >     try
> >     {
> >       reader = IndexReader.open(getRoot(), true);
> >       IndexSearcher searcher = new IndexSearcher(reader);
> >
> >       // Do the search with an artificial limit of 32 results
> >       TopDocs hits = searcher.search(query, 32);
> >
> >       // If the search actually has more hits, then run it again with
> > correct max
> >       if(hits.totalHits > 32)
> >       {
> >         if(log.isDebugEnabled())
> >         {
> >           log.debug("Rerunning query with max size of " +
> hits.totalHits +
> > "
> > " + query);
> >         }
> >
> >         hits = searcher.search(query, hits.totalHits);
> >       }
> >
> >       // Create task ID list and return
> >       if(hits.totalHits < 1)
> >       {
> >         if(log.isDebugEnabled())
> >           log.debug("Query has no hits " + query);
> >
> >         return Collections.emptyList();
> >       }
> >       else
> >       {
> >         if(log.isDebugEnabled())
> >           log.debug("Query has " + hits.totalHits + " hits " +
> query);
> >
> >         List<Long> taskIds = new ArrayList<Long>(hits.totalHits);
> >         for(ScoreDoc doc: hits.scoreDocs)
> >         {
> >
> taskIds.add(Long.valueOf(searcher.doc(doc.doc).get("task")));
> >         }
> >         return taskIds;
> >       }
> >     }
> >     finally
> >     {
> >       try
> >       {
> >         if(reader != null)
> >           reader.close();
> >       }
> >       catch(IOException e)
> >       {
> >       }
> >     }
> >   }
> >
> >
> > > -----Original Message-----
> > > From: Chris Hostetter [mailto:hossman_lucene@fucit.org]
> > > Sent: Wednesday, September 26, 2012 5:18 PM
> > > To: java-user@lucene.apache.org
> > > Subject: Re: short search terms
> > >
> > >
> > > : I have a key field that will only ever have a length of 3
> characters.
> > > I am
> > > : using a StandardAnalyzer and a QueryParser to create the Query
> > > : (parser.parse(string)), and an IndexReader and IndexSearcher to
> > > execute the
> > > : query (searcher(query)). I can't seem to find a setter to allow
> for a
> > > 3
> > > : character search string. There is one setMinWordLen, but it isn't
> > > applicable
> > >
> > > there's a lot of missing information here ... what do you mean
> "allow
> > > for
> > > a 3 character search string" .. the query parser doesn't have
> anything
> > > in
> > > it that would prevent a 3 (or 3, or 1) character search string, so
> i
> > > suspect that's not really the question you mean to ask.
> > >
> > > what is problem you are actaully seeing?  do you have a query that
> > > isn't
> > > matching the docs you think it should? what query? what docs? what
> does
> > > the code look like?
> > >
> > > can you explain more what this 3 character ifeld represents, and
> how
> > > you
> > > want to use it?
> > >
> > > https://people.apache.org/~hossman/#xyproblem
> > > Your question appears to be an "XY Problem" ... that is: you are
> > > dealing
> > > with "X", you are assuming "Y" will help you, and you are asking
> about
> > > "Y"
> > > without giving more details about the "X" so that we can understand
> the
> > > full issue.  Perhaps the best solution doesn't involve "Y" at all?
> > > See Also: http://www.perlmonks.org/index.pl?node_id=542341
> > >
> > > -Hoss
> > >
> > > -------------------------------------------------------------------
> --
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> > > For additional commands, e-mail: java-user-help@lucene.apache.org
> >
> >
> > ---------------------------------------------------------------------
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> >
> >


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