Ð ÐÑÑ, 17.08.2004, Ð 16:46, Tom Lane ÐÐÑÐÑ:
> I think one reason for this is that otherwise it's not clear which > unique constraint the FK constraint depends on. Consider > > create table a (f1 int unique, f2 int unique); > > create table b (f1 int, f2 int, > foreign key (f1,f2) references a(f1,f2)); > > How would you decide which constraint to make the FK depend on? Either way, the semantics are the same, right? -- Markus Bertheau <[EMAIL PROTECTED]> ---------------------------(end of broadcast)--------------------------- TIP 7: don't forget to increase your free space map settings
