A task can be done in a very short way and in a very long way. Which one will you choose?

Knowledge is Power!

This session gives lots of interesting knowledge about an allegedly boring topic - Constraints. And this knowledge will give you the power to optimize and make better decisions.

The behavior of adding columns and constraints to big tables in Oracle may vary significantly, in two aspects - duration and availability - based on the way we perform these operations. In addition, different constraints may have different impact, based on their syntax, types, states, locking, etc.

Attend this session to understand what happens exactly under the hood when we issue a simple ALTER TABLE statement, and how to utilize this knowledge for achieving better performance or higher availability.

This session is based on a series of blog posts I've published about constraint creation optimization, after investigating and analyzing various optimizations that Oracle applies in some cases, and neglects to apply in other cases.