title: in splunk search How to get all instances that has a field without any value
body: <p>This is the line in my log file.I want to get all searchTerms that do not have a value for PAMapped</p>
  
  <blockquote>
    <p>2012-10-29 11:20:21,711 -
    searchTerm=speeding&amp;location=Soperton%2C+GA&amp;PAMapped=</p>
  </blockquote>
  
  <p>This is the search I gave.</p>
  
  <blockquote>
    <p>index=savvis-varnish host="dell1000a-12"
    source="/flocal/logs/lawyers.findlaw.com/search-mapping.log" NOT
    PAMapped=* earliest=-1mon@mon</p>
  </blockquote>
  
  <p>But it does not return all instances. It returns only one. </p>