Hi, There is also a Query/Filter based on that FieldCache: o.a.l.search.FieldValueFilter, possibly wrapped with ConstantScoreQuery
Uwe ----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: Michael McCandless [mailto:luc...@mikemccandless.com] > Sent: Monday, December 19, 2011 2:36 PM > To: java-user@lucene.apache.org > Cc: paul_t...@fastmail.fm > Subject: Re: Query that returns all docs that contain a field > > You could also use FieldCache.getDocsWithField; it returns a bit set where the > bit is set if that document had that field. > > Mike McCandless > > http://blog.mikemccandless.com > > On Mon, Dec 19, 2011 at 7:32 AM, Trejkaz <trej...@trypticon.org> wrote: > > On Mon, Dec 19, 2011 at 9:05 PM, Paul Taylor <paul_t...@fastmail.fm> > wrote: > >> I was looking for a Query that returns all documents that contain a > >> particular field, it doesnt matter what the value of the field is > >> just that the document contains the field. > > > > If you don't care about performance (or if it runs fast enough > > already), use a PrefixQuery with "" as the prefix. > > > > If you care about performance, add a new field which contains the > > names of each field in the document, and query on that. > > > > TX > > > > --------------------------------------------------------------------- > > 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 --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
