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Message-ID: <3E3D4AF7.4050305@root.cz>
Date: Sun, 02 Feb 2003 17:44:39 +0100
From: Lukas Zapletal <lzap@root.cz>
Reply-To: zapletal@inf.upol.cz
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To: Lucene Developers List <lucene-dev@jakarta.apache.org>
Subject: Re: Escaping bug \( and ? or *
References: <3E3ADC2D.4060005@root.cz> <200302011347.57426.tatu@hypermall.net>
In-Reply-To: <200302011347.57426.tatu@hypermall.net>
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Tatu Saloranta wrote:

>I think the problem is that the analyzer you used for indexer strips out 
>parenthesis. So, text actually indexed would look something like:
>"test 1 test 2" (assuming 'and' is a stop word removed). Thus there's
>no token matching term "(1)" or "(2)".
>Same goes for most other punctuation characters, they are routinely
>stripped by analyser, as they usually are not very useful for searching.
>
>To make it work the way you want, you need to modify analyzer to 
>included parentesis, perhaps so that they are included only if
>they contain just single alpha-numeric token (otherwise
>"(1 and 2)" would be tokenized to "(1" and "2)" which is probably
>not what you want?
>
Well I think this is not true.

I use this analzyer either for queries. So the parenthesis and other 
puncatuation are also stripped when I make query.

This is MAYBE a bug. PLEASE TEST THE CODE.

-- 
Lukas Zapletal      [lzap@root.cz]
http://www.tanecni-olomouc.cz/lzap


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