ALTER DATABASE on a current db without explicit db name?

Question

I would like to be able to write sql query that changes the database to which I am currently logged in.

Example:

$ psql my_db
psql(9.1.1)
my_db=> ALTER DATABASE my_db SET some_variable = '0';
                       ^^^^^

Is there a way to avoid specifying the database name in this query?

Answer 1

If you're on 9.1 you can use:

DO $$
BEGIN
   execute 'alter database '||current_database()||' set some_var = ''0''';
END
$$;