vortex_array/arrays/decimal/compute/
take.rs

1use num_traits::AsPrimitive;
2use vortex_buffer::Buffer;
3use vortex_dtype::{NativePType, match_each_integer_ptype};
4use vortex_error::VortexResult;
5use vortex_scalar::{NativeDecimalType, match_each_decimal_value_type};
6
7use crate::arrays::{DecimalArray, DecimalVTable};
8use crate::compute::{TakeKernel, TakeKernelAdapter};
9use crate::vtable::ValidityHelper;
10use crate::{Array, ArrayRef, ToCanonical, register_kernel};
11
12impl TakeKernel for DecimalVTable {
13    fn take(&self, array: &DecimalArray, indices: &dyn Array) -> VortexResult<ArrayRef> {
14        let indices = indices.to_primitive()?;
15
16        let decimal = match_each_decimal_value_type!(array.values_type(), |D| {
17            match_each_integer_ptype!(indices.ptype(), |I| {
18                let buffer =
19                    take_to_buffer::<I, D>(indices.as_slice::<I>(), array.buffer::<D>().as_slice());
20                DecimalArray::new(buffer, array.decimal_dtype(), array.validity().clone())
21            })
22        });
23
24        Ok(decimal.to_array())
25    }
26}
27
28register_kernel!(TakeKernelAdapter(DecimalVTable).lift());
29
30#[inline]
31fn take_to_buffer<I: NativePType + AsPrimitive<usize>, T: NativeDecimalType>(
32    indices: &[I],
33    values: &[T],
34) -> Buffer<T> {
35    indices.iter().map(|idx| values[idx.as_()]).collect()
36}
37
38#[cfg(test)]
39mod tests {
40    use vortex_buffer::buffer;
41    use vortex_dtype::DecimalDType;
42
43    use crate::IntoArray;
44    use crate::arrays::{DecimalArray, DecimalVTable};
45    use crate::compute::take;
46    use crate::validity::Validity;
47
48    #[test]
49    fn test_take() {
50        let array = DecimalArray::new(
51            buffer![10i128, 11i128, 12i128, 13i128],
52            DecimalDType::new(19, 1),
53            Validity::NonNullable,
54        );
55
56        let indices = buffer![0, 2, 3].into_array();
57        let taken = take(array.as_ref(), indices.as_ref()).unwrap();
58        let taken_decimals = taken.as_::<DecimalVTable>();
59        assert_eq!(
60            taken_decimals.buffer::<i128>(),
61            buffer![10i128, 12i128, 13i128]
62        );
63        assert_eq!(taken_decimals.decimal_dtype(), DecimalDType::new(19, 1));
64    }
65}
vortex_array/arrays/decimal/compute/take.rs

vortex_array/arrays/decimal/compute/
take.rs
