> Hi Otis, > > It depends on the Scorer implementation. The default iterates through > matching documents by calling nextDoc(), which just moves along the > postings lists in-order, but you could roll your own. You're pretty > constrained > by the fact that the low-level DocIdSetIterators only move forward though.
Scorer extends DocIdSetIterator and is therefore required to work in docId order. The only allowed exemption from this is Scorer.score(Collector) method, which *may* be out of order. See my other mail. > I'm experimenting with some out-of-order postings lists (for example, sorted > by frequency) to allow early search termination for disjunction queries, but > this has its own drawbacks - if postings lists for different terms are in > different orders, then you can't use any Scorer that calls advance(). > > The other thing to look at would be sorted segments, see > https://issues.apache.org/jira/browse/LUCENE-4752. > > Alan Woodward > www.flax.co.uk > > > On 4 Apr 2013, at 02:56, Otis Gospodnetic wrote: > > > Hi, > > > > When Lucene scores matching documents, what is the order in which > > documents are processed/scored and can that be changed? I'm guessing > > it scores matches in whichever order they are stored in the index/on > > disk, which means by increasing docIDs? > > > > I do see some out of order scoring is possible.... but can one visit > > docs to score in, say, lexicographical order of a specific document > > field? > > > > Thanks, > > Otis > > -- > > Solr & ElasticSearch Support > > http://sematext.com/ > > > > --------------------------------------------------------------------- > > To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org > > For additional commands, e-mail: java-user-h...@lucene.apache.org > > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
