title: Facebook ql asks for indexable column in where clause when it is indexable itself
body: <p>I have tried the following FQL in Facebook: </p>
  
  <pre><code>SELECT checkin_id FROM checkin WHERE author_uid = me()
  </code></pre>
  
  <p><a href="https://developers.facebook.com/tools/explorer/270849796387714/?fql=SELECT%20checkin_id%20FROM%20checkin%20WHERE%20author_uid%20%3D%20me()" rel="nofollow">Test this query</a></p>
  
  <p>However, I get the following response:</p>
  
  <pre><code>{
    "error": {
      "message": "Your statement is not indexable. The WHERE clause must contain an indexable column. Such columns are marked with * in the tables linked from http://developers.facebook.com/docs/reference/fql ", 
      "type": "NoIndexFunctionException", 
      "code": 604
    }
  }
  </code></pre>
  
  <p>But <a href="https://developers.facebook.com/docs/reference/fql/checkin" rel="nofollow">checkin</a> is marked as indexable in the documentation.</p>
  
  <p>Now what can be done?</p>