Heiko, It's most likely because that B case has a purely negative query. Perhaps you can combine it with MatchAllDocs query?
Otis -- Sematext -- http://sematext.com/ -- Lucene - Solr - Nutch ----- Original Message ---- > From: Heiko <[EMAIL PROTECTED]> > To: java-user@lucene.apache.org > Sent: Monday, August 25, 2008 11:29:22 AM > Subject: FilteredQuery > > Hi All, > > i would like to use the FilteredQuery to filter my search results with > the occurrence or absence of certain ids. > > Example A: > query -> text:"albert einstein" > filterQuery -> doctype:letter > > That's ok. I am getting the expected results. But i got no results, if > i filter with the absence of an id. > > Example B: > query -> text:"albert einstein" > filterQuery -> NOT doctype:article > > However following concatenation of filterQuery and query leads to the > expected result. > > Example C: > query -> text:"albert einstein" > filterQuery -> text:"albert einstein" NOT doctype:article > > I am confused that Example B does not worked. It is bug? > > I am using Lucene 2.3.2 and the following code fragement: > > Query query; > Query filterQuery; > ... > Filter filter = new CachingWrapperFilter(new > QueryWrapperFilter(filterQuery)); > FilteredQuery filteredQuery = new FilteredQuery(query, filter); > Hits hits = searcher.search(filteredQuery); > ... > > Thanks, > Heiko Müller > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
