title: django SET SQL_AUTO_IS_NULL = 0
body: <p>Using Mysql,  django-debug-toolbar, I see these useless(?) queries:</p>
  
  <pre><code>SET SQL_AUTO_IS_NULL = 0
  Duplicated 2 times. 
  
  SET SQL_AUTO_IS_NULL = 0
  Duplicated 2 times.
  </code></pre>
  
  <p>This query is repeated 4 times. I couldn't find enough info on that.<br>
  How to remove it?<br>
  Why it is repeated?</p>