Hi there, A work with Neo4j <http://neo4j.org/>, a NoSQL graph database tightly coupled with Lucene. I am now working on an optimizing execution engine. To do this well, I would like to know more about the existing Lucene indices. Ideally, I'd like to be able to ask a Lucene index how many hits a query might give me, before I actually run the query. The answer will probably just be an estimation, but that's fine.
Is this possible today? Best regards, Andrés
