To find all document, that not contain a term, you can combine a MatchAllDocsQuery with BooleanClause.Occur.MUST, combined with one or more TermQueries with BooleanClause.Occur.MUST_NOT (the terms you do not want in the documents).
----- Uwe Schindler H.-H.-Meier-Allee 63, D-28213 Bremen http://www.thetaphi.de eMail: u...@thetaphi.de > -----Original Message----- > From: shashi....@gmail.com [mailto:shashi....@gmail.com] On Behalf Of > Shashi Kant > Sent: Wednesday, March 04, 2009 7:31 PM > To: java-user@lucene.apache.org > Subject: Re: Optimum way to find all document without particular field > > A simple solution would be to store the string "NULL" instead of null and > then query. > > > On Wed, Mar 4, 2009 at 1:26 PM, Chris Lu <chris...@gmail.com> wrote: > > > Allahbaksh, > > > > If you ONLY want to find all document with a particular field that is > not > > null, you can loop through the TermEnum and TermDocs to find all the > > document ids. > > But this can not easily be combined with other queries. > > > > -- > > > > Chris Lu > > > > ------------------------- > > > > Instant Scalable Full-Text Search On Any Database/Application > > > > site: http://www.dbsight.net > > > > demo: http://search.dbsight.com > > > > Lucene Database Search in 3 minutes: > > > http://wiki.dbsight.com/index.php?title=Create_Lucene_Database_Search_in_3 > _minutes > > > > DBSight customer, a shopping comparison site, (anonymous per request) > got > > 2.6 Million Euro funding! > > > > > > > > > > Allahbaksh Mohammedali Asadullah wrote: > > > >> Hi, > >> What is the optimum way in which I can find all the document which has > >> particular field in it. > >> > >> Example > >> I want to find all the document in which the field text is not null. > >> > >> Regards, > >> Allahbaksh > >> > >> Allahbaksh Mohammedali Asadullah, > >> Software Engineering & Technology Labs, > >> Infosys Technolgies Limited, Electronics City, > >> Hosur Road, Bangalore 560 100, India. > >> *Board: +91-80-28520261 | Extn: 53915 | Direct: 41173915. > >> Fax: +91-80-28520362 | Mobile: +91-9845505322. > >> http://setlabs/slim/ > >> http://allahbaksh.blogspot.com<http://allahbaksh.blogspot.com/> > >> > >> > >> > >> > >> > >> **************** CAUTION - Disclaimer ***************** > >> This e-mail contains PRIVILEGED AND CONFIDENTIAL INFORMATION intended > >> solely for the use of the addressee(s). If you are not the intended > >> recipient, please notify the sender by e-mail and delete the original > >> message. Further, you are not to copy, disclose, or distribute this e- > mail > >> or its contents to any other person and any such actions are unlawful. > This > >> e-mail may contain viruses. Infosys has taken every reasonable > precaution to > >> minimize this risk, but is not liable for any damage you may sustain as > a > >> result of any virus in this e-mail. You should carry out your own virus > >> checks before opening the e-mail or attachment. Infosys reserves the > right > >> to monitor and review the content of all messages sent to or from this > >> e-mail address. Messages sent to or from this e-mail address may be > stored > >> on the Infosys e-mail system. > >> ***INFOSYS******** End of Disclaimer ********INFOSYS*** > >> > >> > >> > > > > --------------------------------------------------------------------- To unsubscribe, e-mail: java-user-unsubscr...@lucene.apache.org For additional commands, e-mail: java-user-h...@lucene.apache.org
