On 11/14/2010 05:15 PM, Tom Lane wrote:
> Josh is ignoring the proposal that is on the table and seems actually
> workable, which is to consult the visibility map during index-only
> scans. For mostly-static tables this would save trips to the heap for
> very little extra I/O. The hard part is to make the VM reliable, but
> that is not obviously harder than making separately-stored hint bits
> reliable.
I thought we had agreement in the past that this was the way we should
proceed.
cheers
andrew