I once discussed with you all regarding Oracle's FlashBack Query feature to recover a database to a certain point of time. That time you all suggested some indepth cons of this and how it is resource hungry.
One more feature that I am not sure PostgreSQL has is, row-level, column-level security. Oracle call this Label-Security in which you define a policy for certain columns so that they are not visible to un-authorised users during SELECT queries. This is an important security enhancement. One other feature is called Fine-Grained Auditing. Ability to track user activities. I hope this is in PostgreSQL in one form or the other. I want to know your views on this.
