vortex_array/vtable/
operations.rs

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

vortex_array/vtable/
operations.rs
