Hi, Not possible :) Lucene compares each matching document against the query and produces a score for each. Documents are not compared to eachother like normal sort, that would be way too costly.
But if you explain your use case, I'm sure we can find ways to express your needs in other ways Perhaps it is possible for you to use Sort by Function? http://wiki.apache.org/solr/FunctionQuery#Sort_By_Function Then you can decide exactly what goes into your sort score. If you want to do conditional stuff, you may need to pre-process your documents a bit and create new fields which can be used in a FunctionQuery. -- Jan Høydahl, search solution architect Cominvent AS - www.cominvent.com On 19. apr. 2011, at 19.02, Michael Owen wrote: > > Hi, > I want to able to have a custom sorting algorithm such that for each > comparison of document results (A v B) I can rank them. i.e. writing a > comparator like I would normally do in Java (Compares its two arguments for > order. Returns a negative integer, zero, or a positive integer as the first > argument is less than, equal to, or greater than the second). > In the comparator I want to be able to take into account the score of the > results, as well as other fields in the documents. > I've looked at using things such as the score/boost/bf parameters etc, > however, want the flexibility of being able to code the comparator, so I can > do if conditions and such. > Is this possible? And if so what's the best way of doing this? I've upgraded > to use the latest version of Solr 3.1, and of course for this use case would > expect to have to build from source, in order to add custom source. > Or/and, when using the score/boost/bf parameters etc - is it possible to use > the score parameter in functions, to say scale it between 0 and 1? > Thanks > Mike > > > >
