I checked, and changing the `bazinga_foo_bar` constraint to:
alter table bazinga add constraint bazinga_foo_bar foreign key (foo_id, bar_id) references foo_bar (foo_id, bar_id) deferrable initially deferred;
seems to fix it to work as we were expecting. Is that particularly costly? Should I only set the constraint to be deferred when we really need it? Would it be more efficient to perform the deletes explicitly within a transaction rather than relying on the cascades and deferring that one constraint?
Our resident ex-Oracle DBA said that deferred constraints used to be heavily recommended against, but he also admitted that he hasn't kept up with that in the past 10 years.
-Sam
https://github.com/nelsam"As an adolescent I aspired to lasting fame, I craved factual certainty, and
I thirsted for a meaningful vision of human life -- so I became a scientist.
This is like becoming an archbishop so you can meet girls."
-- Matt Cartmill
Is there a way to force the delete to cascade to tables in a specific order?
No really, but you can defer constraint checking.
David J.
