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
>
>
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