(Based on a discussion in BagNeedScenarios)
[context to be provided]
But most existing RDBMS do this already with an internal row ID. It's only when you need to cross-reference (Join) changing tables do you need a more explicit key. You are adding another step that existing RDBMS don't automatically need.
Please provide that context. I've no idea what this is about.
{For now, search for this topic in the above topic if you don't wish to wait for the cleanup.},