Function arrow_ord::sort::sort_to_indices

pub fn sort_to_indices(
    array: &dyn Array,
    options: Option<SortOptions>,
    limit: Option<usize>
) -> Result<UInt32Array, ArrowError>

Sort elements from ArrayRef into an unsigned integer (UInt32Array) of indices. For floating point arrays any NaN values are considered to be greater than any other non-null value. limit is an option for partial_sort.