> On 03 Jan 2015, at 14:11, Alban Hertroys <haramrae@gmail.com> wrote:
>
> On 02 Jan 2015, at 13:31, Rafal Pietrak <rafal@ztk-rp.eu> wrote:
>> Would it violate SQL standard (signifficantly), if an "on delete set null" action just ignored all the FK columns
thathave a "NOT NULL" constraint set?
>
> As I understand it, this is precisely why Boyce-relationality forbids NULLs in primary keys, although I’m not so sure
he’sright about that.
Well, that’s embarrassing, it’s only a few weeks since I learned this and I’m already attributing the theory to the
wrongdatabase deity! That’s Codd-relationality, of course. Not Boyce.
Alban Hertroys
--
If you can't see the forest for the trees,
cut the trees and you'll find there is no forest.
