Function arrow2::compute::merge_sort::slices

pub fn slices(
    pairs: &[(&[&dyn Array], &SortOptions)]
) -> Result<Vec<MergeSlice>>

Available on crate feature compute_merge_sort only.

Returns a vector of slices from different sorted arrays that can be used to create sorted arrays. pairs is an array representing multiple sorted array sets. The expected format is

pairs: [([a00, a01], o1), ([a10, a11], o2), …] where aj0.len() == aj0.len() aj1.len() == aj1.len() … In other words, pairs.i.0[j] must be an array coming from a batch of equal len arrays.

Example

use arrow2::array::Int32Array;
use arrow2::compute::merge_sort::{slices, SortOptions};
let a = Int32Array::from_slice(&[2, 4, 6]);
let b = Int32Array::from_slice(&[0, 1, 3]);
let slices = slices(&[(&[&a, &b], &SortOptions::default())])?;
assert_eq!(slices, vec![(1, 0, 2), (0, 0, 1), (1, 2, 1), (0, 1, 2)]);

Error

This function errors if the arrays a0i are not pairwise sortable. This happens when either they have not the same crate::datatypes::DataType or when their crate::datatypes::DataType does not correspond to a sortable type.

Panic

This function panics if:

• pairs has no elements
• the length condition above is not fulfilled