"Christopher Kings-Lynne" <[EMAIL PROTECTED]> writes:
> I just noticed you can do this:
> create table blah (
>       a not null references test on delete set null
> )

> Should that be prevented?

It already does.  Or did you mean disallow the declaration?  I can't see
anything in SQL92 that recommends disallowing the declaration.

                        regards, tom lane

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