title: mysql: Cant we create triggers on system tables?
body: <p>I am trying to audit the privilege changes in mysql.user table by writing a trigger on it.</p>
  
  <pre><code>insert trigger: will capture who gave the new permissions and when
  update trigger: will capture who changes the privileges from what[old privilege]
  remove trigger: will capture who removed the privileges and what are they
  </code></pre>
  
  <p>Now, I am getting an error while writing like</p>
  
  <pre><code>ERROR 1465 (HY000): Triggers can not be created on system tables
  </code></pre>
  
  <p>Can we create a trigger on system tables, Is there any work around or it will be supported in higher versions[> 5.1.61] ?</p>
  
  <p>Thanks in advance.</p>