Re: Delete query takes exorbitant amount of time

Christopher Kings-Lynne <chriskl@familyhealth.com.au> writes:
>> In that case there's a datatype mismatch between the referencing and
>> referenced columns, which prevents the index from being used for the
>> FK check.

> Is creating such a foreign key a WARNING yet?

I believe so as of 8.0.  It's a bit tricky since 8.0 does allow some
cross-type cases to be indexed, but IIRC we have a test that understands
about that...

            regards, tom lane