Currently this functionality is not available in Solr out-of-the-box, however there is a patch implementing Field Collapsing http://issues.apache.org/jira/browse/SOLR-236 which might be similar to what you are trying to achieve.
Piete On 13/11/2007, Jörg Kiegeland <[EMAIL PROTECTED]> wrote: > > Is there a way to define a query in that way that a search result > contains only one representative of every set of documents which are > equal on a given field (it is not important which representative > document), i.e. to have the DINTINCT ON-concept from relational > databases in Solr? > > If this cannot be done with the search API of Lucene, may be one can use > Solr server side hooks or filters to achieve this? How? > > The reason why I do not want to do this filtering manually, is, because > I want to have as many matches as possible with respect to my defined > result limit for the query (and filtering the search result on client > side may really kick me off from this limit far away). > > Thanks.. >
