In connection with the work of slowly upcoming release of Apache Solr version 4.0 I thought that it is time to bring some light on the functionalities that you will get into your own hands with the release of Apache Solr 4.0. The first change we will look at is a simple, but albeit useful functionality called pseudo fields, together with additional features related to the fl parameter.
In Solr 3.1 and later we have a very interesting functionality, which enables us to sort by function value. What that gives us ? Actually a few interesting possibilities.