But updateable views are still not what you want! See below.
2. What ChronicDB adds in terms of backward compatibility is, effectively, automatic creation and management of these views for every schema change.
Rather than manually write compatibility views and rewrite/review an application to ensure it always uses these views, programmers instead access plain tables, not views. In fact ChronicDB creates no views at all!
You want to issue SQL queries that don't break. You don't want to manage views to do so. It's a subtle, yet major point. No database to date offers such automated versioning.
ChronicDB of course adds other features we wanted to have from our database (reversibility, data versioning, zero-downtime relocation) again in the spirit of saving the programmer/DBA from doing anything manually.
