vortex_array/arrays/varbin/compute/
cast.rs

1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: Copyright the Vortex contributors
3
4use vortex_error::VortexResult;
5
6use crate::ArrayRef;
7use crate::IntoArray;
8use crate::arrays::VarBinArray;
9use crate::arrays::VarBinVTable;
10use crate::dtype::DType;
11use crate::scalar_fn::fns::cast::CastReduce;
12use crate::vtable::ValidityHelper;
13
14impl CastReduce for VarBinVTable {
15    fn cast(array: &VarBinArray, dtype: &DType) -> VortexResult<Option<ArrayRef>> {
16        if !array.dtype().eq_ignore_nullability(dtype) {
17            return Ok(None);
18        }
19
20        let new_nullability = dtype.nullability();
21        let new_validity = array
22            .validity()
23            .clone()
24            .cast_nullability(new_nullability, array.len())?;
25        let new_dtype = array.dtype().with_nullability(new_nullability);
26        Ok(Some(
27            VarBinArray::try_new(
28                array.offsets().clone(),
29                array.bytes().clone(),
30                new_dtype,
31                new_validity,
32            )?
33            .into_array(),
34        ))
35    }
36}
37
38#[cfg(test)]
39mod tests {
40    use rstest::rstest;
41
42    use crate::IntoArray;
43    use crate::arrays::VarBinArray;
44    use crate::builtins::ArrayBuiltins;
45    use crate::compute::conformance::cast::test_cast_conformance;
46    use crate::dtype::DType;
47    use crate::dtype::Nullability;
48
49    #[rstest]
50    #[case(
51        DType::Utf8(Nullability::Nullable),
52        DType::Utf8(Nullability::NonNullable)
53    )]
54    #[case(
55        DType::Binary(Nullability::Nullable),
56        DType::Binary(Nullability::NonNullable)
57    )]
58    #[case(
59        DType::Utf8(Nullability::NonNullable),
60        DType::Utf8(Nullability::Nullable)
61    )]
62    #[case(
63        DType::Binary(Nullability::NonNullable),
64        DType::Binary(Nullability::Nullable)
65    )]
66    fn try_cast_varbin_nullable(#[case] source: DType, #[case] target: DType) {
67        let varbin = VarBinArray::from_iter(vec![Some("a"), Some("b"), Some("c")], source);
68
69        let res = varbin.into_array().cast(target.clone());
70        assert_eq!(res.unwrap().dtype(), &target);
71    }
72
73    #[rstest]
74    #[should_panic]
75    #[case(DType::Utf8(Nullability::Nullable))]
76    #[should_panic]
77    #[case(DType::Binary(Nullability::Nullable))]
78    fn try_cast_varbin_fail(#[case] source: DType) {
79        let non_nullable_source = source.as_nonnullable();
80        let varbin = VarBinArray::from_iter(vec![Some("a"), Some("b"), None], source);
81        varbin.into_array().cast(non_nullable_source).unwrap();
82    }
83
84    #[rstest]
85    #[case(VarBinArray::from_iter(vec![Some("hello"), Some("world"), Some("test")], DType::Utf8(Nullability::NonNullable)))]
86    #[case(VarBinArray::from_iter(vec![Some("hello"), None, Some("world")], DType::Utf8(Nullability::Nullable)))]
87    #[case(VarBinArray::from_iter(vec![Some(b"binary".as_slice()), Some(b"data".as_slice())], DType::Binary(Nullability::NonNullable)))]
88    #[case(VarBinArray::from_iter(vec![Some(b"test".as_slice()), None], DType::Binary(Nullability::Nullable)))]
89    #[case(VarBinArray::from_iter(vec![Some("single")], DType::Utf8(Nullability::NonNullable)))]
90    fn test_cast_varbin_conformance(#[case] array: VarBinArray) {
91        test_cast_conformance(&array.into_array());
92    }
93}
vortex_array/arrays/varbin/compute/cast.rs

vortex_array/arrays/varbin/compute/
cast.rs
