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vortex_array/arrays/dict/vtable/
operations.rs

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4use vortex_error::VortexExpect;
5use vortex_error::VortexResult;
6
7use super::Dict;
8use crate::ExecutionCtx;
9use crate::array::ArrayView;
10use crate::array::OperationsVTable;
11use crate::arrays::dict::DictArraySlotsExt;
12use crate::scalar::Scalar;
13
14impl OperationsVTable<Dict> for Dict {
15    type ProbeState = ();
16
17    fn scalar_at(
18        array: ArrayView<'_, Dict>,
19        index: usize,
20        ctx: &mut ExecutionCtx,
21    ) -> VortexResult<Scalar> {
22        let Some(dict_index) = array
23            .codes()
24            .execute_scalar(index, ctx)?
25            .as_primitive()
26            .as_::<usize>()
27        else {
28            return Ok(Scalar::null(array.dtype().clone()));
29        };
30
31        Ok(array
32            .values()
33            .execute_scalar(dict_index, ctx)?
34            .cast(array.dtype())
35            .vortex_expect("Array dtype will only differ by nullability"))
36    }
37}