title: FROM_UNIXTIME and performance
body: <p>Does FROM_UNIXTIME heavily affect the performance of a query like this:</p>
  
  <pre><code>        (
              (calltasks.task_dueDate = '".$date."') # Tasks of this date
              OR 
              (calltasks.task_dueDate &lt; '".$date."' AND calltasks.task_status = 'scheduled') # Tasks still available on this date
              OR 
              (FROM_UNIXTIME(calltasks.task_executionTime, '%Y-%m-%d') = '".$date."') # Tasks finished this date
          )
  </code></pre>
  
  <p>Or I should be fine with it ??</p>