On Mon, Oct 8, 2012 at 11:28 AM, Uwe Schindler <u...@thetaphi.de> wrote: > Hi, > > This is a known problem currently. I think there is already an issue open, so > this was not solved for 4.0 (I don't have the issue no available at the > moment). > > My plan to fix this is to make Filters behave like queries (with a rewrite() > method), so the correct context can be passed to a "rewritten" filter (when > QueryWrapperFilter rewrites, it rewrites also the query). The current > approach is for performance reasons, because without rewrite, you would have > no persistent "state" information between index segments, so the Query has to > be rewritten on the top-level index for every segment again. By the current > approach, the query is only rewritten against the current segment with a > private IndexSearcher. By that process the docBase gets lost. So currently > this does not work. > > I would recommend to *not* use QueryWrapperFilter and instead wrap with > ConstantScoreQuery and add it to the query as a Boolean MUST clause. In that > case it should work fine. There is no performance increase by using > QueryWrapperFilter, so no reason to use it.
It's important for me that the score does not change from what it was before, and i'm unable to construct a booleanquery w/ CSQ that basically ignores the filter score. So i made a quick attempt at a basic FilteredQuery (http://pastie.org/4932671) Just returning a ConjunctionScorer with both the query & filter query, and overriding score() to return the query score should do the trick i think? This seems to work correctly in most cases but a test where i just have a MUST_NOT clause in a (boolean)filter does not work this way, because BooleanQuery with a single MUST_NOT clause just shortcircuits this case and returns null from scorer(). A single MUST_NOT clause worked correct in a BooleanFilter. I can't wrap my head around it yet why its ok for BooleanQuery to ignore these clauses ? Anyway i'm now attempting to make a scorer for only prohibited clauses. I guess my question is, is there an easier way i'm missing? Thanks --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
