Re: log_line_prefix and JSON log format

On Fri, 2026-09-25 at 11:36 -0400, Tom Lane wrote:
> Laurenz Albe <laurenz(dot)albe(at)cybertec(dot)at> writes:
> > On Fri, 2026-09-25 at 09:32 +0000, PG Doc comments form wrote:
> > > I noticed, that it not documented anywhere what log_line_prefix will do, if
> > > log_destination = 'jsonlog' (Or CSV). From my tests it seems it is ignored
> > > and does nothing. But we weren't sure and would be helpful to have this
> > > documented.
>
> > True; here is a patch.
>
> This wording seems like it might add confusion rather than remove it,
> because it's not allowing for the fact that log_destination can be
> a list.  I'd be inclined to write something more along the lines of
> "... string that is output at the beginning of each log line that is
> sent to stderr, syslog, or eventlog".

No objection to your wording.

Yours,
Laurenz Albe