Function arrow2::compute::arithmetics::decimal::sub

pub fn sub(
    lhs: &PrimitiveArray<i128>,
    rhs: &PrimitiveArray<i128>
) -> PrimitiveArray<i128>

Available on crate feature compute_arithmetics only.

Subtract two decimal primitive arrays with the same precision and scale. If the precision and scale is different, then an InvalidArgumentError is returned. This function panics if the subtracted numbers result in a number smaller than the possible number for the selected precision.

Examples

use arrow2::compute::arithmetics::decimal::sub;
use arrow2::array::PrimitiveArray;
use arrow2::datatypes::DataType;

let a = PrimitiveArray::from([Some(1i128), Some(1i128), None, Some(2i128)]).to(DataType::Decimal(5, 2));
let b = PrimitiveArray::from([Some(1i128), Some(2i128), None, Some(2i128)]).to(DataType::Decimal(5, 2));

let result = sub(&a, &b);
let expected = PrimitiveArray::from([Some(0i128), Some(-1i128), None, Some(0i128)]).to(DataType::Decimal(5, 2));

assert_eq!(result, expected);