Function get_str_value

datafusion/functions-nested/src/string.rs:499–512

Returns the string value at index `i` from a string array of any type.

(array: &ArrayRef, i: usize)

/// Returns the string value at index `i` from a string array of any type.
fn get_str_value(array: &ArrayRef, i: usize) -> Option<&str> {
    if array.is_null(i) {
        return None;
    }
    match array.data_type() {
        Utf8 => Some(array.as_string::<i32>().value(i)),
        LargeUtf8 => Some(array.as_string::<i64>().value(i)),
        Utf8View => Some(array.as_string_view().value(i)),
        other => {
            debug_assert!(false, "unexpected type in get_str_value: {other:?}");
            None
        }
    }
}

fn array_to_string_inner(args: &[ArrayRef]) -> Result<ArrayRef> {
    if args.len() < 2 || args.len() > 3 {