I'm trying to use http://wiki.apache.org/solr/SolrRelevancyFAQ#How_can_I_boost_the_score_of_newer_documents as a bf parameter to my dismax handler. The problem is, the value of NOW can cause documents in a similar range (date value within a few seconds of each other) to sometimes round to be equal, and sometimes not, changing their sort order (when equal, falling back to a secondary sort). This, in turn, screws up paging.
The problem is that score is rounded to a lower level of precision than what the suggested formula produces as a difference between two values within seconds of each other. It seems to me if I could round the value to minutes or hours, where the difference will be large enough to not be rounded-out, then I wouldn't have problems with order changing on me. But it's not legal syntax to specify something like: recip(ms(NOW,manufacturedate_dt/HOUR),3.16e-11,1,1) Is this a problem anyone has faced and solved? Anyone have suggested solutions, other than indexing a copy of the date field that's rounded to the hour? -- Stephen Duncan Jr www.stephenduncanjr.com
