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From Jason Eacott <ja...@hardlight.com.au>
Subject Re: is it possible to make lucene searches match based on per doc field:termcount?
Date Fri, 06 Nov 2009 08:50:52 GMT
looks like it, thanks!
but if I index multiple copies of the same value, ie: myfield:a,a,b
and search with myfield:(a or b)
or perhaps myfield:(a or a or b)

will I be able to tell the difference? is this apparently duplicate data 
kept as part of the query? (I'd like to be able to do this too)

Cheers
Jason.




Grant Ingersoll wrote:
> 
> 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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