vortex_alp/alp_rd/compute/
mask.rs

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4use vortex_array::ArrayRef;
5use vortex_array::ArrayView;
6use vortex_array::IntoArray;
7use vortex_array::arrays::scalar_fn::ScalarFnFactoryExt;
8use vortex_array::scalar_fn::EmptyOptions;
9use vortex_array::scalar_fn::fns::mask::Mask as MaskExpr;
10use vortex_array::scalar_fn::fns::mask::MaskReduce;
11use vortex_error::VortexResult;
12
13use crate::ALPRD;
14use crate::ALPRDArrayExt;
15
16impl MaskReduce for ALPRD {
17    fn mask(array: ArrayView<'_, Self>, mask: &ArrayRef) -> VortexResult<Option<ArrayRef>> {
18        let masked_left_parts = MaskExpr.try_new_array(
19            array.left_parts().len(),
20            EmptyOptions,
21            [array.left_parts().clone(), mask.clone()],
22        )?;
23        Ok(Some(
24            ALPRD::try_new(
25                array.dtype().as_nullable(),
26                masked_left_parts,
27                array.left_parts_dictionary().clone(),
28                array.right_parts().clone(),
29                array.right_bit_width(),
30                array.left_parts_patches(),
31            )?
32            .into_array(),
33        ))
34    }
35}
36
37#[cfg(test)]
38mod tests {
39    use rstest::rstest;
40    use vortex_array::IntoArray;
41    use vortex_array::arrays::PrimitiveArray;
42    use vortex_array::compute::conformance::mask::test_mask_conformance;
43
44    use crate::ALPRDFloat;
45    use crate::RDEncoder;
46
47    #[rstest]
48    #[case(0.1f32, 0.2f32, 3e25f32)]
49    #[case(0.1f64, 0.2f64, 3e100f64)]
50    fn test_mask_simple<T: ALPRDFloat>(#[case] a: T, #[case] b: T, #[case] outlier: T) {
51        test_mask_conformance(
52            &RDEncoder::new(&[a, b])
53                .encode(&PrimitiveArray::from_iter([a, b, outlier, b, outlier]))
54                .into_array(),
55        );
56    }
57
58    #[rstest]
59    #[case(0.1f32, 3e25f32)]
60    #[case(0.5f64, 1e100f64)]
61    fn test_mask_with_nulls<T: ALPRDFloat>(#[case] a: T, #[case] outlier: T) {
62        test_mask_conformance(
63            &RDEncoder::new(&[a])
64                .encode(&PrimitiveArray::from_option_iter([
65                    Some(a),
66                    None,
67                    Some(outlier),
68                    Some(a),
69                    None,
70                ]))
71                .into_array(),
72        );
73    }
74}
vortex_alp/alp_rd/compute/mask.rs

vortex_alp/alp_rd/compute/
mask.rs
