Re: Enhance pg_stat_wal_receiver view to display connected host

On Fri, Jan 12, 2018 at 4:06 PM, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>
wrote:

> On Fri, Jan 12, 2018 at 03:55:04PM +1100, Haribabu Kommi wrote:
> > Before posting the patch, first I did the same, upon further study
> > I didn't find any scenario where the value is not present in
> > conn->connhost[conn->whichhost].host and present in conn->pghost.
> >
> > If user provides "host" as connection option, the value is present
> > in both the variables. Even if the connection is unix domain socket,
> > there is a value in conn->connhost[conn->whichhost].host.
> >
> > In case if user provides only hostaddr and host connection option,
> > then in that case, both the members are NULL. So even if we add
> > that case, it will be dead code.
>
> Hm. Wouldn't it matter for cases where caller has not yet established a
> connection to the server but still calls PQhost to get the host string?
>

Yes I agree that the above scenario leads to a wrong result with the
earlier patch,
Updated patch attached by including the conn->pghost. Thanks for the review.

Regards,
Hari Babu
Fujitsu Australia