On Thu, Sep 5, 2013 at 11:30 AM, Andres Freund <andres@2ndquadrant.com> wrote:
>> Ideally I'd have made InvalidCommandId = 0 and FirstCommandId = 1,
>> but I suppose we can't have that without an on-disk compatibility break.
>
> The patch actually does change it exactly that way. My argument for that
> being valid is that CommandIds don't play any role outside of their own
> transaction.
Right. It seems like this should probably be noted in the
documentation under "5.4. System Columns" -- I just realized that it
isn't.
--
Peter Geoghegan