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Posted to solr-user@lucene.apache.org by vinay kumar kaku <vk...@hotmail.com> on 2009/01/03 04:32:27 UTC

understanding queryNorm

Hi,
   i wanted to understand  how the queryNorm is calculated. i did read similarity documentation of lucene it says it is 


1
               
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               sqrt(sumOfSquaredWeights)

sumOfSquaredWeights   =  
            q.getBoost() 2
             �� 
          
          
            ��
          
          
            (
            idf(t)  �� 
            t.getBoost()
            ) 2
 

what would be default q.getBoost() ?  ( as i am not giving any value specifically any where in solr). t.getBoost() is 1 in my case as i am not boosting any term at query time. can some one explain with an example if you could ? 

thank you,
vinay

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Re: understanding queryNorm

Posted by Chris Hostetter <ho...@fucit.org>.

:    i wanted to understand how the queryNorm is calculated. i did read 
: similarity documentation of lucene it says it is
	...
: what would be default q.getBoost() ?  ( as i am not giving any value 
: specifically any where in solr). t.getBoost() is 1 in my case as i am 

all queries have a boost value, even if you dont' specify one they have a 
default -- i believe it's "1" for every stock query, but a custom Impl 
could have an alternate default if it really wanted to.

thea easiest way to visuallize a lot of this is with debugQuery=true


-Hoss