title: What cascade "refresh" means in Doctrine 2?
body: <p>What cascade "refresh" means in Doctrine2? Is it entity update operation?   </p>
  
  <p><strong>UPDATE</strong></p>
  
  <p>Now it seems that if, for example, category name is changed, all related products will be fetched and updated. But, since usually entities are related only via id, there is no sense fetch all products, because there is nothing to update in child table. 
  For this reason, I suppose that "refresh" is analogue of MySQL "ON UPDATE CASCADE" -  if the parent primary key is changed, the child value will also change to reflect that. So Doctrine "refresh" operation is the same only in ORM level. And make sense only if we update parent id, am I right?  </p>