Tom wrote:
> Peter Eisentraut <peter_e@gmx.net> writes:
> > That doesn't quite work, because then no ordinary user can define a cast
> > from some built-in type to his own type. What I'm thinking about is to
> > implement the USAGE privilege on types, and then you need to have that to
> > be allowed to create casts.
>
> Still seems too weak.
Yes.
> What about requiring ownership of at least one
> of the types?
I was thinking that too, but, would it be possible to circumvent such
a restriction with a "type in the middle" attack ?
Create your own type and then
1. (auto)cast type1 to own type
2. (auto)cast own type to type2 ?
Andreas