I don't think so. Solr excels at getting the score of single documents, not aggregation.
It's not at all clear to me, though, that the sum of documents' scores is a reasonable thing to sort by. Consider grouping on a very common term. You'd never do this, but group on the elements of a text field. Then the group 'a' would sort to the top almost always (or maybe 'the' or...). This sounds like an XY problem, what use-case are you trying to solve? Best, Erick On Sun, May 4, 2014 at 9:31 PM, frank shi <finalxc...@gmail.com> wrote: > Currently, solr grouping (http://wiki.apache.org/solr/FieldCollapsing) sorts > groups "by the score of the top document within each group". E.g. > [...] > "groups":[{ > "groupValue":"81cb63020d0339adb019a924b2a9e0c2", > "doclist":{"numFound":9,"start":0,"maxScore":4.729042,"docs":[ > { > "id":"7481df771afe39fab368ce19dfeeb528", > [...], > "score":4.729042}, > { > "id":"c879e95b5f16343dad8b1248133727c2", > [...], > "score":4.6635237}, > { > "id":"485b9aec90fd3ef381f013c51ab6a4df", > [...], > "score":4.347174}] > }}, > [...] > Is there an out-of-the-box way to sort groups by the sum of the scores of > the documents within each group? E.g. > [...] > "groups":[{ > "groupValue":"81cb63020d0339adb019a924b2a9e0c2", > "doclist":{"numFound":9,"start":0,"scoreSum":13.739738,"docs":[ > { > "id":"7481df771afe39fab368ce19dfeeb528", > [...], > "score":4.729042}, > { > "id":"c879e95b5f16343dad8b1248133727c2", > [...], > "score":4.6635237}, > { > "id":"485b9aec90fd3ef381f013c51ab6a4df", > [...], > "score":4.347174}] > }}, > [...] > With the release of sorting by Function Query > (https://issues.apache.org/jira/browse/SOLR-1297), it seems that there > should be a way to use the sum() function > (http://wiki.apache.org/solr/FunctionQuery). But it's not quite close enough > since the "score" field is not part of the documents. > > I feel like I'm close but I'm missing some obvious piece. I'm using Solr > 4.6. > > > > -- > View this message in context: > http://lucene.472066.n3.nabble.com/sort-groups-by-the-sum-of-the-scores-of-the-documents-within-each-group-tp4134607.html > Sent from the Solr - User mailing list archive at Nabble.com.
