Wow, so many helpful replies already! Thanks everyone! I'm going to do my best at answering questions … Starting from the first email reply. :) On Fri, May 19, 2017 at 1:20 PM, Adrian Klaver <adrian.klaver@xxxxxxxxxxx> wrote: >> sudo -i -u username > You should not need to do above. >> psql -U otherusername -d database > Just do the above. Perfect, thanks for clarification. > Are either username or otherusername a superuser? > In psql \du will show you. Great question. username is a superuser and otherusername is not. In fact, otherusername has no "local attributes" listed. >> … I get: >> psql: FATAL: Peer authentication failed for user "otherusername" > This is coming from: > https://www.postgresql.org/docs/9.6/static/auth-methods.html#AUTH-PEER > which is set in pg_hba.conf. Ahh, thank you for tip! > What version of Postgres, OS and how was it installed? PostgreSQL 9.3.9 on i686-redhat-linux-gnu, compiled by gcc (GCC) 4.9.2 20150212 (Red Hat 4.9.2-6), 32-bit Installed via yum: $ sudo yum install postgresql-server postgresql-contrib > I am asking because that will help find where pg_hba.conf is. If you have > found it, can you share it here? Totally! pg_hba.conf lives here: /var/lib/pgsql/data/pg_hba.conf The only modifications I made was to change ident to md5 for IPv4 and IPv6 local connections: # TYPE DATABASE USER ADDRESS METHOD # "local" is for Unix domain socket connections only local all all peer # IPv4 local connections: host all all 127.0.0.1/32 md5 # IPv6 local connections: host all all ::1/128 md5 # Allow replication connections from localhost, by a user with the # replication privilege. #local replication postgres peer #host replication postgres 127.0.0.1/32 ident #host replication postgres ::1/128 ident >> Do I need to create a Linux user to login as "otherusername" so I can >> test calling the functionName() with xxx_xxx_xxxxx type? > No that is not necessary. Postgres usernames do not have to be the same as > the OS usernames. Peer authentication is just a method to map OS usernames > to Postgres usernames if you want to. Great, thank you for the clarification! Thank you for the help Adrian, I really appreciate it! -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general