I am using postgres 7.0.can't_remember_the_rest and I am not able to add a FK via alter table command. When I try to do it I get an "Feature not implemented" error message. This is what I've been trying to do:
alter table foo
add constraint foo_fk
foreign key (a) references foo_2
where "a" is a column name in foo.
I thought I would be able to add constraints via alter table by using pgsql 7. Was I wrong?