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From Grant Ingersoll <gsing...@apache.org>
Subject Re: is it possible to make lucene searches match based on per doc field:termcount?
Date Fri, 06 Nov 2009 01:11:02 GMT

On Nov 5, 2009, at 4:31 PM, Jason Eacott wrote:

> Hi All, I hope someone can offer some advice.
> I want to extend lucene to search in a particular way(if it cant  
> already):
>
> I want to index docs, each with file containing several terms  
> something like:
> doc1=>myfield:a
> doc2=>myfield:a,b
> doc3=>myfield:a,b,c
> doc4=>myfield:a,b,c,d
> so far nothing new.
>
> I want to query for matching docs such that a query something like  
> myfield:(a or b)  should only return docs if the doc itself is FULLY  
> matched.
> ie, for the query myfield:(a or b) , only doc1 and doc2 should match.
> So the rules are its only a match if the termcount for each doc is  
> <=the termcount of the query(for that field) AND ALL the terms in  
> the doc were matched
>
> a few more examples just to clarify:
> myfield:(a or b or d) would match doc4
> myfield:(a or b or c or d) would match ALL the docs here (this one  
> works anyway but only because it uses all the terms that exist)
> myfield:(a) would match doc1
>
> order is not important (but might be a nice have)
>
> can anyone tell me if its possible to make lucene do this, and  
> perhaps offer a starting point?

Would overriding http://lucene.apache.org/java/2_4_0/api/org/apache/lucene/search/DefaultSimilarity.html#coord%28int,%20int%29

  help?


--------------------------
Grant Ingersoll
http://www.lucidimagination.com/

Search the Lucene ecosystem (Lucene/Solr/Nutch/Mahout/Tika/Droids)  
using Solr/Lucene:
http://www.lucidimagination.com/search


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