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vortex_alp/alp/compute/
slice.rs

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4use std::ops::Range;
5
6use vortex_array::ArrayRef;
7use vortex_array::ArrayView;
8use vortex_array::ExecutionCtx;
9use vortex_array::IntoArray;
10use vortex_array::arrays::slice::SliceKernel;
11use vortex_error::VortexResult;
12
13use crate::ALP;
14use crate::ALPArrayExt;
15use crate::ALPArraySlotsExt;
16
17impl SliceKernel for ALP {
18    fn slice(
19        array: ArrayView<'_, Self>,
20        range: Range<usize>,
21        _ctx: &mut ExecutionCtx,
22    ) -> VortexResult<Option<ArrayRef>> {
23        let sliced_alp = ALP::new(
24            array.encoded().slice(range.clone())?,
25            array.exponents(),
26            array
27                .patches()
28                .map(|p| p.slice(range))
29                .transpose()?
30                .flatten(),
31        )
32        .into_array();
33        Ok(Some(sliced_alp))
34    }
35}