Skip to main content

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::ExecutionCtx;
8use vortex_array::IntoArray;
9use vortex_array::arrays::SliceKernel;
10use vortex_error::VortexResult;
11
12use crate::ALPArray;
13use crate::ALPVTable;
14
15impl SliceKernel for ALPVTable {
16    fn slice(
17        array: &Self::Array,
18        range: Range<usize>,
19        _ctx: &mut ExecutionCtx,
20    ) -> VortexResult<Option<ArrayRef>> {
21        let sliced_alp = ALPArray::new(
22            array.encoded().slice(range.clone())?,
23            array.exponents(),
24            array
25                .patches()
26                .map(|p| p.slice(range))
27                .transpose()?
28                .flatten(),
29        )
30        .into_array();
31        Ok(Some(sliced_alp))
32    }
33}