Help on the Query Parser

[Terence Lai <tl...@trekspace.com>]

Hi all,

I am trying to use the QueryParser.parse() to parse a query string like "java* developer". Note that I want the wildcard string, java*, followed by the word developer. The following is the code.

-------------
String qryStr = "\"java* developer\"";
String fieldname = "text";
StandardAnalyzer analyzer = new StandAnalyzer();

Query qry = org.apache.lucene.queryParser.QueryParser.parse(qryStr, fieldname, analyzer);
-------------

When I do a qryStr.toString() to print out the contents, I got the following output:

---------------------
text:"java developer"
---------------------

Look likes that the wildcard query disappeared. In fact, I am expecting text:"java* developer" to be returned. It seems to me that the QueryParser cannot handle the wildcard within a quoted String.

Does anyone has a solution on this? Am I missing something in the code?

Thanks,
Terence





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Re: Help on the Query Parser

[Daniel Naber <da...@t-online.de>]

On Wednesday 24 November 2004 08:16, Morus Walter wrote:

> Lucene itself doesn't handle wildcards within phrases.

This can be added using PhrasePrefixQuery (which is slightly misnamed):
http://jakarta.apache.org/lucene/docs/api/org/apache/lucene/search/PhrasePrefixQuery.html

Regards
 Daniel

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Re: Help on the Query Parser

[Morus Walter <mo...@tanto.de>]

Terence Lai writes:
> 
> Look likes that the wildcard query disappeared. In fact, I am expecting text:"java* developer" to be returned. It seems to me that the QueryParser cannot handle the wildcard within a quoted String.
> 
That's not just QueryParser. 
Lucene itself doesn't handle wildcards within phrases.
You could have a query text:"java* developer" if '*' isn't removed by the 
analyzer. But it would only search for the token 'java*' not any expansion of 
that. I guess this is not, what you want.

Morus

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