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Message-ID: <bd818c7b0609170436na73d9c3qe311784dcf91ab93@mail.gmail.com>
Date: Sun, 17 Sep 2006 07:36:14 -0400
From: "no spam" <mrs.nospam@gmail.com>
To: java-user@lucene.apache.org
Subject: Re: default AND operator
In-Reply-To: <Pine.LNX.4.58.0609162046310.32095@hal.rescomp.berkeley.edu>
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When I use "french AND antiques" I get documents like this :

score: 1.0, boost: 1.0, cont: French Antiques
score: 0.23080501, boost: 1.0, cont: FRENCH SEPTIC
score: 0.23080501, boost: 1.0, cont: French & French Septic
score: 0.20400475, boost: 1.0,id: 25460, cont: French & Associates

As in the first e-mail the Query object shows these terms:

contents:french contents:antiqu  <---- using string "french AND antiques"

when using Operator.AND it shows these:

+contents:french +contents:antiqu      <----- here I used used "french
antiques"

The second example below matches NONE of the documents above and in fact
only if I do synonym expansion with stemming.

*****My big question here is why doesn't the operator.AND force both of
these queries to be identical? These will be users typed queries so I want
Lucene to force the use of AND so I don't have to search/replace


On 9/16/06, Chris Hostetter <hossman_lucene@fucit.org> wrote:
>
> can you be more specific about what it is you "expect", and what exactly
> serachTerms is in your examples?  (presumably it's a string, is it the
> string "french AND antiques" ... are you sure it's not "french and
> antiques" ? ... QueryParser only respects AND and OR if they are
> capitalized, otherwise they are treated as normal words, which are
> probably StopWords to your analyzer .. in which case everything you've
> shown makes perfect sense to me.)
>
>
> :
> :   stemParser = new QueryParser("contents", stemmingAnalyzer);
> :   Query query = stemParser.parse(searchTerms);
> :   Hits docHits = searcher.search(query);
> :
> : Debug from query shows: contents:french contents:antiqu  ... I would
> have
> : expected to see '+' before contents.
> :
> : But not if I try the query again with "french antiques" with this code
> ...
> : which sets the default operator to AND:
> :
> :    stemParser = new QueryParser("contents", stemmingAnalyzer);
> :   stemParser.setDefaultOperator(QueryParser.Operator.AND);
> :   Query query = stemParser.parse(searchTerms);
> :   Hits docHits = searcher.search(query);
> :
> : Debug from Query shows this:  +contents:french +contents:antiqu
> :
>
>
>
> -Hoss
>
>
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