On Mon, Oct 10, 2011 at 6:23 PM, Bruce Momjian <bruce@momjian.us> wrote:
> I talked to Robert Haas and he said that index-only scans do not
> optimize COUNT(*). Is this something we can do for PG 9.2? Is anyone
> working on this?
People usually conflate multiple problems when they talk about
"count(*). The usual case people are concerned about would require
materialized views, not index-only scans.
--
greg