On 12.06.25 23:20, Jeff Davis wrote:
On Thu, 2025-06-12 at 21:16 +0200, Peter Eisentraut wrote:
Do we have other options that are order-sensitive?
I think most of them are. For example:
psql -p 5432 -p 5433
initdb --data-checksums --no-data-checksums
postgres --shared-buffers=1GB --shared-buffers=2GB
Interesting. I don't think the "last option wins" model applies to
other pg_dump options, though. For instance, in PG17:
pg_dump --data-only --schema-only
pg_dump: error: options -s/--schema-only and -a/--data-only cannot be
used together
I don't think it's simple to start using "last option wins" behavior
now. There are probably some combinations of options where it's not
clear whether a later option is an extra constraint or will override a
previous option.
It makes sense to raise an error if the specified options cannot be
consolidated in an obvious way. I'd expect
pg_recvlogical --create-slot --drop-slot
to fail, but I'd expect
pg_recvlogical --create-slot --slot=foo --slot=bar
to work.
One of the challenges in the current case is that it is not obvious how
--with-data, --no-data, --data-only etc. are connected. If that were
clearer, then the way these options should combine or conflict would
hopefully follow somewhat naturally.
