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From tare...@controldocs.com
Subject Re: Case-sensitive search
Date Fri, 19 Aug 2005 14:35:53 GMT
>
> On Aug 18, 2005, at 6:22 PM, tareque@controldocs.com wrote:
>
>>> On Thu, 2005-08-18 at 17:16, tareque@controldocs.com wrote:
>>>
>>>> Thanks again! The analyzer is working now. But seems like
>>>> actually the
>>>> QueryParser I am using is probably converting the queries to
>>>> lowercase
>>>> first. Is there any way to stop that? Here is the line of code
>>>> where I
>>>> am
>>>> parsing:
>>>>
>>>> Query query = QueryParser.parse(line, "contents", analyzer);
>>>>
>>>> As for analyzer, I have tried both StardaAnalyzer and StopAnalyzer.
>>>>
>>>
>>> You need to use the same analyzer for parsing queries as you do for
>>> indexing content.
>>>
>>> Luke Francl
>>>
>>>
>>
>> Actually I have used StopAn for indexing. So used the same for parsing
>> queries, but it's still converting the queries to lowercase before
>> running
>> the actually search
>
> Both of those analyzers lowercase.  When you said it was working,
> what did you mean?   To prevent lowercasing and get stop words
> removed you *will* have to write a custom analyzer.  Also keep in
> mind that StopFilter is case-sensitive and that the stop word list is
> all lowercase - so you will need to account for this with a custom
> stop filter probably too.
>
> It is highly recommended to "analyze the analyzer" - a topic covered
> in depth in the Analysis chapter in Lucene in Action, and one of my
> java.net articles.
>
>      Erik
>

It's all working now. I did write a custom analyzer using the
StopAnalyzer, which correctly indexed. The problem was, when I was parsing
the query I forgot to use my new analyzer and was using the old
StopAnalyzer instead. Thanks for all the help!

Tareque


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