title: not query in lucene
body: <p>i need to do not queries on my lucene index. Lucene currently allows not only when we have two or more terms in the query:</p>
  
  <p>So I can do something like:</p>
  
  <pre><code>country:canada not sweden
  </code></pre>
  
  <p>but I can't run a query like:</p>
  
  <pre><code>country:not sweden
  </code></pre>
  
  <p>Could you please let me know if there is some efficient solution for this problem</p>
  
  <p>Thanks</p>