ivoras=# alter table foo alter constraint "foo_a_b_key" deferrable;ERROR: constraint "foo_a_b_key" of relation "foo" is not a foreign key constraint
A more clear error message would be:
EROR: cannot alter non-foreign key constraint "foo_a_b_key" of relation "foo"
Though I'm not sure how that meshes with the error message style guides...
David J.
