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From Erick Erickson <erickerick...@gmail.com>
Subject Re: Optimum way to find all document without particular field
Date Wed, 04 Mar 2009 19:51:33 GMT
Remember, though, that this won't work *unless* there is
a value to exclude, thus several of the suggestions to
index a special token in the relevant field that's guaranteed
to not be something you ever want to legitimately
search on.

Erick

On Wed, Mar 4, 2009 at 2:10 PM, Uwe Schindler <uwe@thetaphi.de> wrote:

> 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: uwe@thetaphi.de
>
> > -----Original Message-----
> > From: shashi.mit@gmail.com [mailto:shashi.mit@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.lu@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/>
> > >>
> > >>
> > >>
> > >>
> > >>
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