On Mon, May 14, 2018 at 05:22:39PM -0400, Tom Lane wrote:
> Maybe it'd be worth building some sort of infrastructure that would
> allow this to be done at a lower level. It's not hard to imagine
> an autovacuum-like or bgworker-based thingy that could run around
> and apply a given SQL script in every database, bypassing the usual
> worries about authentication and connections-disabled databases.
A portion of the infrastructure is already available for background
workers which can use BGWORKER_BYPASS_ALLOWCONN since Postgres 11 to
enforce connections to databases even if an administrator disables
connections to it.
--
Michael