vortex_array/arrays/chunked/compute/
compare.rs

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4use vortex_error::VortexResult;
5
6use crate::arrays::{ChunkedArray, ChunkedVTable};
7use crate::builders::{ArrayBuilder, BoolBuilder};
8use crate::compute::{CompareKernel, CompareKernelAdapter, Operator, compare};
9use crate::{Array, ArrayRef, register_kernel};
10
11impl CompareKernel for ChunkedVTable {
12    fn compare(
13        &self,
14        lhs: &ChunkedArray,
15        rhs: &dyn Array,
16        operator: Operator,
17    ) -> VortexResult<Option<ArrayRef>> {
18        let mut idx = 0;
19
20        let mut bool_builder = BoolBuilder::with_capacity(
21            // nullable <= non-nullable
22            (lhs.dtype().is_nullable() || rhs.dtype().is_nullable()).into(),
23            lhs.len(),
24        );
25
26        for chunk in lhs.non_empty_chunks() {
27            let sliced = rhs.slice(idx..idx + chunk.len());
28            let cmp_result = compare(chunk, &sliced, operator)?;
29
30            bool_builder.extend_from_array(&cmp_result);
31            idx += chunk.len();
32        }
33
34        Ok(Some(bool_builder.finish()))
35    }
36}
37
38register_kernel!(CompareKernelAdapter(ChunkedVTable).lift());
39
40#[cfg(test)]
41mod tests {
42    use vortex_buffer::Buffer;
43
44    use super::*;
45    use crate::IntoArray;
46
47    #[test]
48    fn empty_compare() {
49        let base = Buffer::<u32>::empty().into_array();
50        let chunked =
51            ChunkedArray::try_new(vec![base.clone(), base.clone()], base.dtype().clone()).unwrap();
52        let chunked_empty = ChunkedArray::try_new(vec![], base.dtype().clone()).unwrap();
53
54        let r = compare(chunked.as_ref(), chunked_empty.as_ref(), Operator::Eq).unwrap();
55
56        assert!(r.is_empty());
57    }
58}
vortex_array/arrays/chunked/compute/compare.rs

vortex_array/arrays/chunked/compute/
compare.rs
