Order by an expression in Solr

Question

In SQL you can order by an expression like:

SELECT * FROM a
ORDER BY CASE WHEN a.Category = 20 THEN 1 ELSE 0 DESC

so records who have Categ

Answer 1

If you are using the dismax request handler, then you can use boost queries in a similar fashion. http://wiki.apache.org/solr/DisMaxQParserPlugin#bq_.28Boost_Query.29 Note that this doesn't function exactly like the your SQL example, but you can achieve the same results with it.