If a string field has a value with " ", that has to be searched for. fieldName:" " should work. If there is a 0-length value in a string field, that might be found with fieldName:"" but I have no experience with 0-length values. I don't know if this adds a value to the field or not: "<field name="fieldName"></field>"
One way to find out is to make that field required in the schema. If no value goes in, you'll get an error. The facet output should list " " and "". On Sat, Nov 20, 2010 at 2:38 PM, Viswa S <svis...@hotmail.com> wrote: > > Erick, > Thanks for the quick response. The output i showed is on a test instance i > created to simulate this issue. I intentionally tried to create documents > with no values by creating xml nodes with "<field name="fieldName"></field>", > but having values in the other fields in a document. > Are you saying that there is no way have a field with no value?, with text > fields they seem to make sense than for string?. > You are right on fieldName:[* TO *] results, which basically returned all the > documents which included the couple of documents in question. > -Viswa >> Date: Sat, 20 Nov 2010 17:20:53 -0500 >> Subject: Re: Empty value/string matching >> From: erickerick...@gmail.com >> To: solr-user@lucene.apache.org >> >> I don't think that's correct. The documents wouldn't be showing >> up in the facets if they had no value for the field. So I think you're >> being mislead by the printout from the faceting. Perhaps you >> have unprintable characters in there or some such. Certainly the >> name:" " is actually a value, admittedly just a space. As for the >> other, I suspect something similar. >> >> What results do you get back when you just search for >> FieldName:[* TO *]? I'm betting you get all the docs back, >> but I've been very wrong before. >> >> Best >> Erick >> >> On Sat, Nov 20, 2010 at 5:02 PM, Viswa S <svis...@hotmail.com> wrote: >> >> > >> > Yes I do have a couple of documents with no values and one with an empty >> > string. Find below the output of a facet on the fieldName. >> > ThanksViswa >> > >> > >> > <int name="">2</int><int name="CASTIGO.430">2</int><int >> > name="GDOGPRODY.424">2</int><int name="QMAGIC.412">2</int><int name=" >> > ">1</int> >> > > Date: Sat, 20 Nov 2010 15:29:06 -0500 >> > > Subject: Re: Empty value/string matching >> > > From: erickerick...@gmail.com >> > > To: solr-user@lucene.apache.org >> > > >> > > Are you absolutely sure your documents really don't have any values for >> > > "FieldName"? Because your results are perfectly correct if every doc has >> > a >> > > value for "FieldName". >> > > >> > > Or are you saying there no such field as "FieldName"? >> > > >> > > Best >> > > Erick >> > > >> > > On Sat, Nov 20, 2010 at 3:12 PM, Viswa S <svis...@hotmail.com> wrote: >> > > >> > > > >> > > > Folks,Am trying to query documents which have no values present, I have >> > > > used the following constructs and it doesn't seem to work on the solr >> > dev >> > > > tip (as of 09/22) or the 1.4 builds.1. (*:* AND -FieldName[* TO *]) - >> > > > returns no documents, parsedquery was "+MatchAllDocsQuery(*:*) >> > -FieldName:[* >> > > > TO *]"2. -FieldName:[* TO *] - returns no documents, parsedquery was >> > > > "-FieldName:[* TO *]"3. FieldName:"" - returns no documents, >> > parsedquery was >> > > > empty (<str name="parsedquery"/>)The field is type string, using the >> > > > LuceneQParser, I have also tried to see if "FieldName:[* TO *]" if the >> > > > documents with no terms are ignored and didn't seem to be the case, the >> > > > result set was everything.Any help would be appreciated.-Viswa >> > > > >> > >> > > -- Lance Norskog goks...@gmail.com
