[How to Solve] psql: FATAL: role “postgres” does not exist

I’m a postgres novice.

I installed the postgres.app for mac. I was playing around with the psql commands and I accidentally dropped the postgres database. I don’t know what was in it.

I’m currently working on a tutorial:http://www.XXX.com/blog/building-a-project-with-mezzanine/

And I’m stuck atsudo -u postgres psql postgres

ERROR MESSAGE:psql: FATAL: role "postgres" does not exist

$ which psql


This is what prints out ofpsql -l

                                List of databases
    Name    |   Owner    | Encoding | Collate | Ctype |     Access privileges     
 user       | user       | UTF8     | en_US   | en_US | 
 template0  | user       | UTF8     | en_US   | en_US | =c/user                  +
            |            |          |         |       | user      =CTc/user      
 template1  | user       | UTF8     | en_US   | en_US | =c/user                  +
            |            |          |         |       | user      =CTc/user      
(3 rows)

So what are the steps I should take?Delete an everything related to psql and reinstall everything?

Thanks for the help guys!



Note that the error message doesNOTtalk about a missing database, it talks about a missing role. Later in the login process it might also stumble over the missing database.

But the first step is to check the missing role: What is the output withinpsqlof the command\du?On my Ubuntu system the relevant line looks like this:

                              List of roles
 Role name |            Attributes             | Member of 
 postgres  | Superuser, Create role, Create DB | {}        

If there is not at least one role withsuperuser, then you have a problem 🙂

If there is one, you can use that to login. And looking at the output of your\lcommand: The permissions foruseron thetemplate0andtemplate1databases are the same as on my Ubuntu system for the superuserpostgres. So I think your setup simple usesuseras the superuser. So you could try this command to login:

sudo -u user psql user

Ifuseris really the DB superuser you can create another DB superuser and a private, empty database for him:


But since your postgres.app setup does not seem to do this, you also should not. Simple adapt the tutorial.



/Applications/Postgres.app/Contents/Versions/9.*/bin/createuser -s postgres

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