title: Add minutes to datetime in Hive
body: <p>Is there a function in Hive one could use to add minutes(in int) to a datetime similar to <code>DATEADD (datepart,number,date)</code>in sql server where <code>datepart</code> can be <code>minutes</code>:
  <code>DATEADD(minute,2,'2014-07-06 01:28:02')</code> returns <code>2014-07-06 01:28:02</code><br>
  On the other hand, Hive's <code>date_add(string startdate, int days)</code> is in <code>days</code>. Any of such for <code>hours</code>?</p>