Re: Relation Schemata vs. Relation Variables

Marshall wrote:
>
> I haven't seen much written about transition constraints, and
> would be happy to read more if anyone has any good pointers.
> I went a-Googling a week or two ago for writings on the topic
> and the only interesting thing I came across was a forgotten
> post by me asking people about transition constaints! Ha ha!
>

There is a brief mention and example in TTM (3rd ed.). Transition constraints don't appear to be well understood or supported. For example Oracle exposes the tuple-level update flaw in its FOR EACH ROW triggers.

-- 
David Portas