On Sat, May 12, 2012 at 9:12 AM, Valeriy Felberg <valeri.felb...@gmail.com> wrote: >> the Document IDs in Lucene are per segment. ie. they are always >> segment based. > > @Simon I'm just wondering: If the document IDs are per segment how > does it work if I call Searcher.search(Query, int) and get TopDocs > referencing ScoreDocs which contain document IDs? What happens if > there are two matching documents in different segments? How does > Lucene know which segment is meant if I call Searcher.doc(docId) with > some docId from the search result?
The per-segment docIDs are "rebased" before Searcher.search returns, ie turned into global docID against the top reader. Also: when a merge runs, it removes any deleted docIDs (thus renumbering all non-deleted docIDs)... Mike McCandless http://blog.mikemccandless.com --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
