solr: Create filter query with a function

Question

One of the values returned by my solr query is a calculated value (using solr 4.0). The function is

sum(product(2,preis12_0_3),preis34_0_3)

Now I would like to filter the resultset on the values returned by the function, but I get this error:

undefined field text

Is it possible to filter on a function? Any pointers in the right direction appreciated.

Answer 1

Filter query do support function queries with FunctionRangeQParserPlugin

eg Filter query example: fq={!frange l=0 u=2.2}sum(user_ranking,editor_ranking)

undefined field text -> Would be the case for the field not being defined in the schema.xml