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Message-ID: <4646D424.7090609@fastmail.fm>
Date: Sun, 13 May 2007 10:02:28 +0100
From: Paul Taylor <paul_t100@fastmail.fm>
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To: java-user@lucene.apache.org
Subject: Re: Problem using wildcardsearch in phrase search
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I think the KeywordAnlyser bit is maybe a red herring, the problem seems 
to be that you cant use * within double quotes, I made some changes to 
my data and index to remove the space character

If I fed 54:puid* to my code it generates a Prefix Query and works as 
required
Search Query Is54:puid*
Parsed Search Query Is54:puid*of type:class 
org.apache.lucene.search.PrefixQuery

but with the quotes (which I would need if my value contained spaces)  I 
only get a Term Query (which doesnt handle wildcards)
Search Query Is54:"puid*"
Parsed Search Query Is54:puid*of type:class 
org.apache.lucene.search.TermQuery

so why is this ?

thanks Paul

code is:
 public List <Integer> generalSearch(String luceneSearch)
    {
        System.out.println("Search Query Is"+luceneSearch);
        List <Integer> matchingRows = new ArrayList<Integer>();
        try
        {
            //make a new index searcher with the inmemory (RAM) index.
            IndexSearcher is = new IndexSearcher(directory);

            //Build a query based on the searchString and cached analyzer
            QueryParser parser = new QueryParser(ROW_NUMBER,analyzer);
            Query query = parser.parse(luceneSearch);
            System.out.println("Parsed Search Query 
Is"+query.toString()+"of type:"+query.getClass());
            //run the search
            Hits hits = is.search(query);
            Iterator i = hits.iterator();
            while(i.hasNext())
            {
                Document doc = ((Hit)i.next()).getDocument();
                matchingRows.add(new 
Integer(doc.getField(ROW_NUMBER).stringValue()));
            }
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
        System.out.println("Search Query Results Set:"+matchingRows.size());
        return matchingRows;
    }


Mark Miller wrote:
>
>>
>>
>> Perhaps not like whitespaceanalyzer does in all cases, but this code
>>
>>            QueryParser qp = new QueryParser("field", new
>> WhitespaceAnalyzer());
>>
>>            Query q = qp.parse("Does this tokenize*");
>>            System.out.println(q.toString());
>>
>> produces
>>
>> field:Does field:this field:tokenize*
>>
>>
>>
>> while this code
>>            QueryParser qp = new QueryParser("field", new
>> KeywordAnalyzer());
>>
>>            Query q = qp.parse("Does this tokenize*");
>>            System.out.println(q.toString());
>>
>>
>> Produces:
>> field:Does field:this field:tokenize*
>>
>> The only difference is using KeywordAnalyzer rather than 
>> WhitespaceAnalyzer.
>>
>> I sure don't see the difference, and it's puzzled me on and off.
>>
>> Erick
> QueryParser breaks up "Does this tokenize*" before it even gets to the 
> Analyzer...each space separated term is fed to the analyzer one at a 
> time...unless they are surrounded in quotes in which case the whole 
> string in the quotes is fed into the analyzer.
>
> - Mark
>
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