On Sat, Oct 14, 2017 at 8:31 AM, Joe Conway <m...@joeconway.com> wrote:
> Sorry for the slow response, but thinking back on this now, the idea of
> these functions, in my mind at least, was to provide as close to the
> same output as possible to what pg_controldata outputs. So:
>
> # pg_controldata
> ...
> Minimum recovery ending location:     0/0
> Min recovery ending loc's timeline:   0
> Backup start location:                0/0
> Backup end location:                  0/0
> End-of-backup record required:        no
> ...
>
> So if we make a change here, do we also change pg_controldata?

For a lot of folks on this list, it is clear that things like
InvalidXLogRecPtr map to 0/0, but what of end-users? Couldn't we
consider marking those fields as "undefined" for example. "invalid"
would mean that the state of the cluster is incorrect, so I am not
sure if that is most adapted.
-- 
Michael


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