I'm trying to find the appropriate place to store a system path in PostgreSQL.

What I'm trying to do is load values into a table using the COPY command. However, since I will be referring to the same file path regularly I want to store that path in one place. I've tried creating a function to return the appropriate path, but I get a syntax error when I call the function in the COPY command. I'm not sure if this is the right way to go about it, but I'll post my code anyway.

COPY command:

COPY employee_scheduler.countries (code, name)
    FROM get_csv_path('countries.csv')
    WITH CSV;

Function Definition:

CREATE OR REPLACE FUNCTION
    employee_scheduler.get_csv_path(IN file_name VARCHAR(50))
    RETURNS VARCHAR(250) AS $$
DECLARE
    path VARCHAR(200) := E'C:\\Brian\\Work\\employee_scheduler\\database\\csv\\';
    file_path VARCHAR(250) := '';
BEGIN
   file_path := path || file_name;
   RETURN file_path;
END;
$$ LANGUAGE plpgsql;

If anyone has a different idea on how to accomplish this I'm open to suggestions.

Thanks for any help!