title: How to write bigint (timestamp in milliseconds) value as timestamp in postgresql
body: <p>I'm trying to store in timestamp with timezone field my value. It is in milliseconds from 1970.</p>
  
  <p><code>select TO_CHAR(TO_TIMESTAMP(1401432881230), 'DD/MM/YYYY HH24:MI:SS.MS')</code></p>
  
  <p>Expected <code>30/5/2014 11:29:42 10:54:41.230</code>, but get
  <code>22/08/46379 23:27:02.000</code></p>