Re: Transaction ID not logged if no explicit transaction used

Tom Lane wrote:
> Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> writes:
> > Martn Marqus wrote:
> >> This really gives little use for recovery_target_xid. :(
>
> > Hmm, you can still use pg_xlogdump to figure it out from the actual WAL,
> > which has the correct XIDs. It's obviously a worse solution though from
> > the user's POV, because it's hard to figure out what WAL record
> > corresponds to the change you care about ...
>
> To what extent does the commit_ts infrastructure fix this?

I don't think it does at all. You could try to find out the XID using a
timestamp you obtain from the log file (knowing that the lookups are the
opposite way, i.e. you give it an XID and it returns a timestamp); but
if that's the scenario, I think it's simpler to use the timestamp in
recovery_target_time directly.

--
Álvaro Herrera http://www.2ndQuadrant.com/
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