Thanks for the fast response. I'll certainly have a look at the upcoming 3.6.x release. What is the expected performance for using a negated filter? In particular does it defeat the index in any way and require a full index scan? Is it different between regular fields and numeric fields?
For 3.5 and earlier though, is there any suggestion other than magic values? -----Original Message----- From: Uwe Schindler [mailto:u...@thetaphi.de] Sent: Thursday, February 16, 2012 1:07 PM To: java-user@lucene.apache.org Subject: RE: query for documents WITHOUT a field? Lucene 3.6 will have a FieldValueFilter that can be negated: Query q = new ConstantScoreQuery(new FieldValueFilter("field", true)); (see http://goo.gl/wyjxn) Lucen 3.5 does not yet have it, you can download 3.6 snapshots from Jenkins: http://goo.gl/Ka0gr ----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: Tim Eck [mailto:t...@terracottatech.com] > Sent: Thursday, February 16, 2012 9:59 PM > To: java-user@lucene.apache.org > Subject: query for documents WITHOUT a field? > > My apologies if this answer is readily available someplace, I've searched > around and not found a definitive answer. > > > > I'd like to run a query for documents that _do not_ contain particular indexed > fields to implement something like a SQL-like query where a column is null. > > > > I understand I could possibly use a magic value to represent "null", but the data > I'm searching doesn't led itself to reserving a value for null. I also understand I > could add an extra field to hold this boolean isNull state but would love a better > solution :-) > > > > TIA > > --------------------------------------------------------------------- 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
