This is possible, using the ScorerVisitor (3.6) / getChildren (4.0). You need a custom collector that when it collects a competitive hit, visits the sub-scorers of your BooleanQuery and saves away which ones matched the current doc.
But this is very expert and there are real challenges (eg not all scorers score document-at-a-time) ... would be nice if someone wrote up some example code showing how to do it... Mike McCandless http://blog.mikemccandless.com On Wed, Jul 18, 2012 at 7:17 AM, Ashish Jaen <ashishj...@gmail.com> wrote: > Is there a way to know which sub-clause of a boolean query matched in the > result document ? Currently I am using searcher.explain() on each of the > sub-clause of the boolean query (on each of the documents returned by > searcher). However, this is turning out to be very slow as I need to > process ALL the documents returned by the query (A typical query returns > about 20 thousand documents and my collection has 10 million docs. My > application is not a user facing one, so few seconds per query is still > acceptable) > > I was wondering if there is a efficient way to achieve the above which > doesnot use explain() (perhaps storing the information about which > sub-clause matched a document while searching). Can anyone provide some > method to solve this and point to the relevant classes which need to be > changed. > > Thanks, > -Ashish --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
