title: MySQL trigger is not called by constraints
body: <p>I have two (InnoDB) tables with triggers for UPDATE, INSERT and DELETE. They work fine if I work directly on the tables. Further I have a foreign key constraint when I delete a row in tableA all rows in tableB referenced by tableA.id get also deleted. That also works but the problem is:</p>
  
  <p>A DELETE on tableA triggers the DELETE-trigger for tableA. Then the constraint deletes rows at tableB <strong>but</strong> no DELETE-triggers for tableB get called. Why? Do constraints do not trigger triggers?</p>
  
  <p>Thanks.</p>
  
  <p>(Triggers are AFTER DELETE. Tried also with BEFORE DELETE without success.)</p>