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From Chris Hostetter <>
Subject Re: Enhancing Solr relevance functions through predefined constants
Date Tue, 01 Jun 2010 18:57:01 GMT
: I have a suggestion for improving relevance functions in Solr by way of
: providing access to a set of pre-defined constants in Solr queries.
: Specifically, the number of documents indexed, the number of unique terms in
: a field, the total number of terms in a field, etc. are some of the
: query-time constants that I believe can be made use of in function queries
: as well as boosted queries to aid in the relevance calculations.

I'm not sure if he was inspired by your email or not, but i did notice 
yonik just opened an issue that sounds very similar to this...

FWIW: number of unique terms in a field is reall, really, expensive to 
compute (although perhaps we could cache it somewhere)


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