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When trust authentication is specified, PostgreSQL assumes that anyone who can connect to the server is authorized to access the database with whatever database SQL answers related to “psql: error: fatal: role "santi" does not exist”. how to check table exists or not in postgresql · User, group, or role 'open' Without -D , the server will try to use the data directory named by the environment variable PGDATA . If that variable is not provided either, it will fail. Do not attempt to upgrade unless you have enough free space available. Check your database size using sudo du -sh /var/opt/gitlab/postgresql/data (or updatecreatedb: could not connect to database postgres: FATAL: role "joe" does not exist where your own login name is mentioned. This will happen if the Database-SQL-RDBMS HOW-TO document for Linux (PostgreSQL Object Relational The universe you are currently living in was NOT there - all the atoms inside