vortex_array/vtable/
operations.rs

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

vortex_array/vtable/
operations.rs
