Hi,
On 2020-08-16 17:28:46 -0400, Tom Lane wrote:
> Andres Freund <andres@anarazel.de> writes:
> > For the first, one issue is that there's no obviously good candidate for
> > an uninitialized xid. We could use something like FrozenTransactionId,
> > which may never be in the procarray. But it's not exactly pretty.
>
> Huh? What's wrong with using InvalidTransactionId?
It's a normal value for a backend when it doesn't have an xid assigned.
Greetings,
Andres Freund