Warren Little <warren.little@meridiascapital.com> writes:
> which appears to be the pg_toast entry. Shouldn't there be a pg_class
> whose reltoastrelid equals the reltoastidxid of the pg_toast instance
No. The deal is
regular table's reltoastrelid points to OID of its toast table
toast table's reltoastidxid points to OID of its index
There's no "back links".
regards, tom lane