> I have to make some experiments for which I explicitly need version 9.1.1 > of PostgreSQL. > > I have installed it from source using the official documentation but I am > not able to initialize the cluster after that. > > When I run initdb, I receive the following error: > STATEMENT: REVOKE ALL on pg_authid FROM public;
You could try installing 9.1.<latest>, initdb with that, then revert the package back to 9.1.1. -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services