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From "Chris Lu" <chris...@gmail.com>
Subject Re: search for empty field?
Date Wed, 03 Sep 2008 19:11:04 GMT
Thanks Erick for reminding me of this!
I only need to validate a index and make sure the content are correctly
retrieved and index doesn't have empty fields.
So I'd better simply go through all document by id and check them directly.

Thanks!

-- 
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!

On Wed, Sep 3, 2008 at 11:49 AM, Erick Erickson <erickerickson@gmail.com>wrote:

> This has been discussed multiple times, so looking at the
> searchable archive will give you more detailed info. But as
> I remember, the consensus suggestion was to index some
> "impossible" value for those documents that lack a field.
> For instance, say your field was "sometimes". I document
> that had nothing to index for that field could get a value of
> "ZZZZZZZZZZZZZ".
>
> Now your query is simple sometimes:ZZZZZZZZZZZZZ
>
>
> Best
> Erick
>
> On Tue, Sep 2, 2008 at 4:23 AM, Chris Lu <chris.lu@gmail.com> wrote:
>
> > Is it possible to query for documents that have empty values for a field?
> >
> > Say need to find documents with category empty, I tried negative query:
> >  -category:*
> > But it returns 0 document. I think "category:*" is basically match all,
> so
> > this "-category:*" doesn't work.
> >
> > Thanks!
> >
> > --
> > 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!
> >
>

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