: I have a problem of returning an list of results which is sorted on a : average of ranks returned from aggregates. : the qury would be something like ? : q=product:p1+product:p2+product:p3; sort score desc : To explain Supose I have documents with fields Product, Manufacturer, Rank : and I want to return the top manufacturers across products p1,p2,p3 with : highest average rank on these products.
the topic of generating statistics on facet constraints has come up before ... but nothing for doing that is provided out of the box at the moment. while basic stats like the min/mean/median/stddev/max of a numeric facet field (in the context of a q/fq) would be relativeily straight forward to add to Solr's built in simple facet support; more complex types statistics (like hat you describe) would be difficult to implement in a way that would be generally reusable through simple query params ... however: it would probably be fairly straightfoward to implemnt domain specific stats like this directly in a custom plugin. The new SearchComponents framework available in the trunk would probably be an easy way to do this, allthough it's not very well documented at the moment. If you lok at the existing FacetComponent however, seeing how it generates facet counts, and extending it to know about your specific fields and generate the type of stats you want should be possible. -Hoss
