Mailing List Archive: StopFilter-troubles

StopFilter-troubles

Mar 27, 2002, 6:37 AM

Post #1 of 4 (745 views)

Dear Lucene-users,
has someone an answer to the following question:
If I add a StopFilter to my Analyzer, the stopwords I gave him will be left
out the query. So far, so good. But when my query is like this one: (field1
: xxxxx) AND (field2 : stopword) AND (field 1 : yyyyy)
the StopFilter will do its work, but the resulting query is a big mess :
(field1 : xxxxx) AND ( ) AND (field 1 : yyyyy), and because of that the
searching results ara no good. I hoped it would search for (field1 : xxxxx)
AND (field 1 : yyyyy).
I think the StopFilter does a poor job here. Is anyone familiar with this
problem and has an answer for me?
Puk Witte.

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Re: StopFilter-troubles [ In reply to ]

otis_gospodnetic at yahoo

Mar 27, 2002, 9:37 AM

Post #2 of 4 (748 views)

Permalink

--- P.Witte@CS.unimaas.nl wrote:
> Dear Lucene-users,
> has someone an answer to the following question:
> If I add a StopFilter to my Analyzer, the stopwords I gave him will
> be left
> out the query. So far, so good. But when my query is like this one:
> (field1
> : xxxxx) AND (field2 : stopword) AND (field 1 : yyyyy)
> the StopFilter will do its work, but the resulting query is a big
> mess :
> (field1 : xxxxx) AND ( ) AND (field 1 : yyyyy), and because of that
> the
> searching results ara no good. I hoped it would search for (field1 :
> xxxxx)
> AND (field 1 : yyyyy).
> I think the StopFilter does a poor job here. Is anyone familiar with
> this
> problem and has an answer for me?
> Puk Witte.

I tried something like this on one Lucene index:
description:travel AND description:a

The results were the same as this query:
description:travel

This seems right to me.

Otis

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RE: StopFilter-troubles [ In reply to ]

P.Witte at CS

Mar 27, 2002, 9:56 AM

Post #3 of 4 (741 views)

Permalink

Dear all, especially Otis Gospodnetic (thanks for your answer),
without ( )'s the StopFilter is doing a good job indeed, but if I put them
around parts of the query, then the searchResult is wrong.
For example:
(field1 : xxxxx) AND (field2 : stopword) AND (field 1 : yyyyy)
So I'm afraid my problem is not solved yet. But maybe someone can try it
with the ()'s with his own tool and tell me if they've got the same problem.
Then I know whether I made a mistake.

Puk Witte

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RE: StopFilter-troubles [ In reply to ]

otis_gospodnetic at yahoo

Mar 27, 2002, 10:19 AM

Post #4 of 4 (744 views)

Permalink

I don't know enough about the query parser to be able to answer that
question, but why do you really need those parentheses?
It would also be great if you could submit this as a bug at
http://jakarta.apache.org/lucene/

Thanks,
Otis

--- P.Witte@CS.unimaas.nl wrote:
> Dear all, especially Otis Gospodnetic (thanks for your answer),
> without ( )'s the StopFilter is doing a good job indeed, but if I put
> them
> around parts of the query, then the searchResult is wrong.
> For example:
> (field1 : xxxxx) AND (field2 : stopword) AND (field 1 : yyyyy)
> So I'm afraid my problem is not solved yet. But maybe someone can try
> it
> with the ()'s with his own tool and tell me if they've got the same
> problem.
> Then I know whether I made a mistake.
>
> Puk Witte
>
>
>
>
>
>
>
>
>
>
> --
> To unsubscribe, e-mail:
> <mailto:lucene-user-unsubscribe@jakarta.apache.org>
> For additional commands, e-mail:
> <mailto:lucene-user-help@jakarta.apache.org>
>

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