assert postgres_isnull: result.is_null(0,0) == false else print_error db.error
assert postgres_value: result.value(0,0) == "Bob" else print_error db.error
assert postgres_isnull: result.is_null(0,0) == false else print_error db.error
assert postgres_value: result.value(0,0) == "Bob" else print_error db.error