Re: Lowercasing wildcards - why?

[Leo Galambos]

I'm sorry, I did not read the complete thread. Do you mean - analyzer == 
stemmer? Does it really work? If I was a stemmer, I would let "searche" 
intact. ;-)

-g-

[EMAIL PROTECTED] wrote:

Hi Les,

We ended up modifying the QueryParser to pass prefix and suffix queries
through the Analyzer.  For us, it was about stemming.  If you decide to use
an analyzer that incorporated stemming, there are cases where wildcard
queries will not return the expected results.
Example:  "searcher" will probably get stemmed to "search".  A search on
"searche*" should hit the term "searcher", but, it won't, all instances of
"searcher" having been stemmed to "search" at index time.  Our solution was
to remove the trailing wildcard and send "searche" to the analyzer, then
tack the wildcard character back on there and create the PrefixQuery object
with the new search string "search*".
DaveB



                                                                                                                
                     Leslie Hughes                                                                              
                     <[EMAIL PROTECTED]        To:       "'[EMAIL PROTECTED]'"           
                     ion.com.au>                          <[EMAIL PROTECTED]>                      
                                                         cc:                                                    
                     05/30/03 01:09 AM                   Subject:  Lowercasing wildcards - why?                 
                     Please respond to "Lucene                                                                  
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Hi,

I was just wondering what the rationale is behind lowercasing wildcard
queries produced by QueryParser? It's just that my data is all upper case
and my analyser doesn't lowercase so it seems a bit odd that I have to call
setLowercaseWildcardTerms(false). Couldn't queryparser leave the terms
unnormalised or better still pass them through the analyser?
I'm sure there's a good reason for it though.....

Les



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