Re: Default setting for enable_hashagg_disk

David Rowley <dgrowleyml@gmail.com> writes:
> hmm yeah. It's unfortunate, but I'm not sure how I'd have implemented
> it differently.  The problem is made worse by the fact that we'll only
> release the memory for the hash table during ExecEndHashJoin(). If the
> planner had some ability to provide the executor with knowledge that
> the node would never be rescanned, then the executor could release the
> memory for the hash table after the join is complete.

EXEC_FLAG_REWIND seems to fit the bill already?

            regards, tom lane