This is what I am going to achieve - running a drill down query with baseQuery = null / MatchAllDocsQuery(), and expecting the index returning all the documents that matches the drill down path(s). So it returns nothing back to me, however as long as I make the basequery to search a specific term instead of null / MatchAllDocsQuery(), it returns correct results back to me.
I read the src code of DrillDownQuery, it says "using null / MatchAllDocsQuery() as base query is equal to a pure browsing query". I was assuming it should work with a particular set of drill down paths too, but it does not seem to be so. BTW - I am using Lucene 4.10.2
