Sebastien Flaesch <sebastien(dot)flaesch(at)4js(dot)com> writes:
> I can find possible values for the DATESTYLE parameter in an old 7.2 doc page:
> https://www.postgresql.org/docs/7.2/sql-set.html
> But when switching to V14 there are no more values listed in the equivalent page...
All such info got moved to the per-setting documentation in chapter 20:
https://www.postgresql.org/docs/current/runtime-config-client.html#RUNTIME-CONFIG-CLIENT-FORMAT
regards, tom lane