: Why doesn't " AND text:foo" fill this requirement? or fq=text:foo (if you don't want it to affect scoring, and it sounds like you don't)
But since you asked: if you want to use functions in "fq" you have to tell solr to parse it as a function. There are a variaty of options... https://wiki.apache.org/solr/FunctionQuery#Using_FunctionQuery ...but for an "fq" you'll probably want to use the "frange" QParser (since your goal is to limit matches based on the value of a function)... https://lucene.apache.org/solr/api/org/apache/solr/search/FunctionRangeQParserPlugin.html -Hoss
