title: How to dynamically add interval to timestamp?
body: <p><br />
  I need at some point to increment dynamically a timestamp plsql variable. <br />
  So, instead of doing this:</p>
  
  <pre><code>timestamp_ := timestamp_ + INTERVAL '1' DAY;
  </code></pre>
  
  <p>I would like to do thomething like this:</p>
  
  <pre><code>timestamp_ := timestamp_ + INTERVAL days_ DAY;
  </code></pre>
  
  <p>It doesn't really work.
  My final goal is to dynamically create some scheduler jobs for some entities that have an variable expiration date, to avoid creating a single one which would be often executed.</p>