BUG #18880: Can't have a database without having postgres as a db_name and username

Like I said I can't have a database with another db_name and username I find
that frustrating because I need to change these to class myself for my work
I need multiple database with differents name and username

Thank you for the support in advance and I hope you will solve that faster!

Can you please describe what you are trying to do exactly? You definitely can have multiple databases with their own owners.

Regards
Daniel

PG Bug reporting form <noreply@postgresql.org> writes:

Like I said I can't have a database with another db_name and
username

Sure you can. The bootstrap superuser account's name is set by
initdb [1]https://www.postgresql.org/docs/current/app-initdb.html. It's true that you can't change the initial set of
database names (postgres, template0, template1), but you can
create more databases within the installation [2]https://www.postgresql.org/docs/current/manage-ag-createdb.html.

If you're really stubborn you can delete or rename the postgres
database, but you might regret it. A lot of client tools assume
that as the default database-to-connect-to. I don't recommend
deleting or renaming template0 or template1 under any
circumstances [3]https://www.postgresql.org/docs/current/manage-ag-templatedbs.html.

regards, tom lane

[1]: https://www.postgresql.org/docs/current/app-initdb.html
[2]: https://www.postgresql.org/docs/current/manage-ag-createdb.html
[3]: https://www.postgresql.org/docs/current/manage-ag-templatedbs.html