Method invoke_with_args

datafusion/functions/src/math/pi.rs:65–74

(&self, args: ScalarFunctionArgs)

    }

    fn invoke_with_args(&self, args: ScalarFunctionArgs) -> Result<ColumnarValue> {
        assert_or_internal_err!(
            args.args.is_empty(),
            "{} function does not accept arguments",
            self.name()
        );
        Ok(ColumnarValue::Scalar(ScalarValue::Float64(Some(
            std::f64::consts::PI,
        ))))
    }

    fn output_ordering(&self, _input: &[ExprProperties]) -> Result<SortProperties> {
        // This function returns a constant value.