vortex_array/vtable/
operations.rs

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4use std::ops::Range;
5
6use vortex_scalar::Scalar;
7
8use crate::ArrayRef;
9use crate::vtable::VTable;
10
11pub trait OperationsVTable<V: VTable> {
12    /// Perform a constant-time slice of the array.
13    ///
14    /// If an encoding cannot perform this slice in constant time, it should internally
15    /// store an offset and length in order to defer slicing until the array is accessed.
16    ///
17    /// This function returns [`ArrayRef`] since some encodings can return a simpler array for
18    /// some slices, for example a [`crate::arrays::ChunkedArray`] may slice into a single chunk.
19    ///
20    /// ## Preconditions
21    ///
22    /// Bounds-checking has already been performed by the time this function is called.
23    fn slice(array: &V::Array, range: Range<usize>) -> ArrayRef;
24
25    /// Fetch the scalar at the given index.
26    ///
27    /// ## Preconditions
28    ///
29    /// Bounds-checking has already been performed by the time this function is called,
30    /// and the index is guaranteed to be non-null.
31    fn scalar_at(array: &V::Array, index: usize) -> Scalar;
32}
vortex_array/vtable/operations.rs

vortex_array/vtable/
operations.rs
