how can I change the default owner of the public schema on postgresql database?

Question

When I create a database with my user the public schema is created with "postgres" user. I can create and drop tables in this schema but I can't drop the schema or change the owner.

I'm installing Phinx migrations for a php project. This is a mature project which has many tables. For the first migration on the up() method I load a sql file with the schema of the database and on the down() method I would drop schema (tables, triggers, procedures...)

class FirstMigration extends AbstractMigration
{
    public function up()
    {
        $schema= file_get_contents('./database/migrations/schemaDB.sql');
        $this->execute($schema);
    }

    public function down()
    {
        $this->execute("DROP SCHEMA public CASCADE");
        $this->execute("CREATE SCHEMA public");
    }
}

When I do rollback, I have an error:

Insufficient privilege: 7 ERROR: You must be owner of public schema.

When I create the database I choose the user "citest"

But the owner by default for the public schema is "postgres"!

and I can't change it.

My user is the owner of database but isn't the owner of the public schema which is the user "postgres".

Answer 1

The default user of the public schema is set by the template database (called template1 ) that Postgres copies when it creates a new DB. If you want to change defaults of newly created databases you need to modify template1 . For example you can DROP SCHEMA public from template1 . Now you won't need to start your migrations by dropping public because it won't exist. Of course to do this you'll need to (at least temporarily) login with a user that has permissions to edit template1 .

For more information read this thread on the Postgres mailing list, https://www.postgresql.org/message-id/CAFjNrYu8GqD%3D17DimG9QtWoV1hPviqHxaZp2umWAPkpUOFAGYg%40mail.gmail.com .