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Posted to user@nutch.apache.org by smith learner <sm...@yahoo.com> on 2005/09/11 22:39:43 UTC
Re: [Nutch-general] Can I use range query alone
I found the reason that causes this problem.
In file LuceneQueryOptimizer, there is a method called
public TopDocs optimize(BooleanQuery original,
Searcher searcher, int
numHits, String sortField, boolean reverse)
There is a block processing range query. That's the
place that prevents using range query alone.
So, I'd like to know why not to add range query into
the query variable? why not to change range query's
boost back to 1.0f (the range query boost value is set
to 0.0f in DateQueryFilter)?
Is this purpose or a bug?
Regards,
smith.
--- smith learner <sm...@yahoo.com> wrote:
> I use nutch0.7. I tried to search with keyword
> date:19000101-20051231. Nutch returns 0 entries
> matched.
> I am sure that i added index-more plugin and
> query-more plugin.
>
>
> Did anybody meet the same problem before?
> Can anybody tell me where i am wrong or if this is
> supoosed to be?
>
> Thanks in advance!
>
> smith.
>
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Re: [Nutch-general] Can I use range query alone
Posted by Doug Cutting <cu...@nutch.org>.
Ranges are converted into Lucene filters and can thus not be used alone,
but only in conjunction with some other non-range query term.
RangeQuery is not efficient, since it can expand into thousands (or
more) query terms. If you want to see all documents in a date range,
then perhaps try something like "url:http date:19000101-20051231".
Doug
smith learner wrote:
> I found the reason that causes this problem.
> In file LuceneQueryOptimizer, there is a method called
>
> public TopDocs optimize(BooleanQuery original,
> Searcher searcher, int
> numHits, String sortField, boolean reverse)
>
> There is a block processing range query. That's the
> place that prevents using range query alone.
>
> So, I'd like to know why not to add range query into
> the query variable? why not to change range query's
> boost back to 1.0f (the range query boost value is set
> to 0.0f in DateQueryFilter)?
> Is this purpose or a bug?
>
> Regards,
>
> smith.
>
>
> --- smith learner <sm...@yahoo.com> wrote:
>
>
>>I use nutch0.7. I tried to search with keyword
>>date:19000101-20051231. Nutch returns 0 entries
>>matched.
>>I am sure that i added index-more plugin and
>>query-more plugin.
>>
>>
>>Did anybody meet the same problem before?
>>Can anybody tell me where i am wrong or if this is
>>supoosed to be?
>>
>>Thanks in advance!
>>
>>smith.
>>
>>__________________________________________________
>>Do You Yahoo!?
>>Tired of spam? Yahoo! Mail has the best spam
>>protection around
>>http://mail.yahoo.com
>>
>>
>>
>
> -------------------------------------------------------
>
>>SF.Net email is Sponsored by the Better Software
>>Conference & EXPO
>>September 19-22, 2005 * San Francisco, CA *
>>Development Lifecycle Practices
>>Agile & Plan-Driven Development * Managing Projects
>>& Teams * Testing & QA
>>Security * Process Improvement & Measurement *
>>http://www.sqe.com/bsce5sf
>>_______________________________________________
>>Nutch-general mailing list
>>Nutch-general@lists.sourceforge.net
>>
>
> https://lists.sourceforge.net/lists/listinfo/nutch-general
>
>
>
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around
> http://mail.yahoo.com