"Matthew Campbell" <mtthw.cmpbll@gmail.com> writes:
> ... We've been digging through the src/backend/access/hash/
> and we're having a hard time figuring out the correct way to walk through
> items in a page. Is this what the hashbeginscan() method is for?
No, hashbeginscan doesn't do much at all except initialize state. The
interesting stuff happens during successive hashgettuple calls ---
specifically _hash_first the first time and _hash_next on later calls.
regards, tom lane