Find records with no values in solr.LatLongType fied type

[Kamal Kishore Aggarwal]

Hi,

I am working on solr 4.8,1. I am trying to find the docs where latlongtype
have null values.

I have tried using these, but not getting the results :

1) http://localhost:8984/solr/IM-Search/select?q.alt=-usrlatlong:[' ' TO *]

2) http://localhost:8984/solr/IM-Search/select?q.alt=-usrlatlong:[* TO *]

Here's the configurations :
> <fieldType name="latlongtype" class="solr.LatLonType"
> subFieldSuffix="_coordinate"/>
> <field name="usrlatlong" type="latlongtype" indexed="true" stored="true"
> required="false" multiValued="false" />


Please help.