Re: index-only scans

Robert Haas <robertmhaas@gmail.com> writes:
> Please find attached a patch implementing a basic version of
> index-only scans.  This patch is the work of my colleague Ibrar Ahmed
> and myself, and also incorporates some code from previous patches
> posted by Heikki Linnakanagas.

I'm starting to review this patch now.  Has any further work been done
since the first version was posted?  Also, was any documentation
written?  I'm a tad annoyed by having to reverse-engineer the changes
in the AM API specification from the code.
        regards, tom lane