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Date: Tue, 11 Mar 2008 11:41:12 -0300
From: "German Kondolf" <german.kondolf@gmail.com>
To: java-user@lucene.apache.org
Subject: Re: Searching for null (empty) fields, how to use -field:[* TO *]
In-Reply-To: <47D6985C.40207@gmail.com>
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References: <15976538.post@talk.nabble.com> <47D6985C.40207@gmail.com>

*:* is parsed as a MatchAllDocsQuery?

I've got some preformance issues in Lucene 2.2 because
MatchAllDocsQuery ask for a "isDeleted()" for every document, I didn't
tried it in 2.3.

On Tue, Mar 11, 2008 at 11:34 AM, Mark Miller <markrmiller@gmail.com> wrote:
> You cannot have a purely negative query like you can in Solr.
>
>  Try: *:* -MY_FIELD_NAME:[* TO *]
>
> thogau wrote:
>  > Hi,
>  >
>  >
>  > I browsed the forum searching for a way to make a query that retrieves
>  > document that do not have any value for a given field (say MY_FIELD_NAME).
>  >
>  >
>  > I read several posts advising to use this syntax : -MY_FIELD_NAME:[* TO *]
>  > However, I am not able to have it working...
>  >
>  >
>  > I have 2 documents, the first one has a value for the field MY_FIELD_NAME
>  > (In Luke, I can see the value) and the second one has no value for it (In
>  > Luke, I can see&lt;not available&gt;)
>  >
>  >
>  > I would expect the query MY_FIELD_NAME:[* TO *] to retrieve the document
>  > which has a value for the field MY_FIELD_NAME but it doesn't (Nevertheless
>  > MY_FIELD_NAME:[a* TO z*] retrieves it)
>  >
>  >
>  > Also, I would expect the query -MY_FIELD_NAME:[* TO *] to retrieve the
>  > document which has a NO value for the field MY_FIELD_NAME but it doesn't
>  > either...
>  >
>  >
>  > I guess I am missing something obvious but I am stuck... Anybody can help to
>  > understand what I am doing wrong?
>  >
>  >
>
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