title: VPD and Context With Application Express
body: <p>I'm going to build application using Application Express and Oracle Database Enterprise, VPD Implemented on the schema using Context,
  for developer issue I set on login trigger to set user;</p>
  
  <p>but I can't view data inside application but I can view it using SQL statement </p>
  
  <p>So is their issue in Apex when using VPD , Context , or On log on trigger?</p>