Function order_nulls_first

datafusion/functions-nested/src/sort.rs:490–498

(modifier: &str)

}

fn order_nulls_first(modifier: &str) -> Result<bool> {
    match modifier.to_uppercase().as_str() {
        "NULLS FIRST" => Ok(true),
        "NULLS LAST" => Ok(false),
        _ => exec_err!(
            "the third parameter of array_sort expects NULLS FIRST or NULLS LAST"
        ),
    }
}