title: Error: Expected Literal, got '*' in Doctrine
body: <p>I want to retrieve the number of rows in my courrier table.</p>
  <p>In my fixtures, I have these lines :</p>
  <pre><code>$query = $this-&gt;em-&gt;createQuery('SELECT count(*) FROM App\Entity\Courrier');
  $countCourrier = $query-&gt;getResult();
  </code></pre>
  <p>I have these mistakes when I do <code>symfony console doctrine:fixtures:load</code> :</p>
  <pre><code>In QueryException.php line 38:
                                                                 
  [Syntax Error] line 0, col 13: Error: Expected Literal, got '*'  
                                                                 
  
  In QueryException.php line 27:
                                          
  SELECT count(*) FROM App\Entity\Courrier  
                                         
  </code></pre>
  <p>What's wrong with the * in my query ?</p>