út 5. 1. 2021 v 18:51 odesílatel Bruce Momjian <bruce@momjian.us> napsal:
On Mon, Jan 4, 2021 at 09:46:32AM -0700, David G. Johnston wrote: > On Mon, Jan 4, 2021 at 8:26 AM Joel Jacobson <joel@compiler.org> wrote: > > In the documentation at https://www.postgresql.org/docs/current/ > functions-admin.html > this behaviour is not mentioned anywhere as far as I can see: > > > > https://www.postgresql.org/docs/current/runtime-config-custom.html > > I do think "Customized Options" is an accurate description. One needs to > consider their usage of such variables as "modular" even though there is no > library code involved. i.e., the description is possibly overly specific but > the variables created in this manner are simply namespaced but otherwise usable > in any manner you deem fit.
I think I tried to make this feature more visible a few years ago and some people said we might remove it someday, so don't do that. If that is false, I think we can make it more prominent.
This feature is frequently used as a workaround for missing global package variables. And a lot of scripts use this feature as only one possibility to push parameters to the DO statement.
Unfortunately - there is not any guard against typo errors, are untyped, and access is slow - it is designed for different purposes.