title: how to pass variables in hive using hue
body: <p>I will pass variables, 
  I try this </p>
  
  <pre><code>SET x = 'user';
  SELECT * FROM foo WHERE user == @user
  </code></pre>
  
  <p>but I have one error </p>
  
  <p>Then I will try </p>
  
  <pre><code>set x='user';
  select * from foo where user == '${hiveconf:x}'
  </code></pre>
  
  <p>but I have error:</p>
  
  <pre><code> error while compiling statement: failed: parseexception line   
   1:38 missing eof at 'user' near ''''
  </code></pre>
  
  <p>Any ideas? </p>
  
  <p>Thanks</p>