pub fn saturating_mul(
    lhs: &PrimitiveArray<i128>,
    rhs: &PrimitiveArray<i128>,
) -> PrimitiveArray<i128> {
    let (precision, scale) = get_parameters(lhs.data_type(), rhs.data_type()).unwrap();

    let scale = 10i128.pow(scale as u32);
    let max = max_value(precision);

    let op = move |a: i128, b: i128| match a.checked_mul(b) {
        Some(res) => {
            let res = res / scale;

            match res {
                res if res.abs() > max => {
                    if res > 0 {
                        max
                    } else {
                        -max
                    }
                }
                _ => res,
            }
        }
        None => max,
    };

    binary(lhs, rhs, lhs.data_type().clone(), op)
}
/// Saturated multiplication of two decimal primitive arrays with the same
/// precision and scale. If the precision and scale is different, then an
/// InvalidArgumentError is returned. If the result from the multiplication is
/// larger than the possible number with the selected precision then the
/// resulted number in the arrow array is the maximum number for the selected
/// precision.
///
/// # Examples
/// ```
/// use arrow2::compute::arithmetics::decimal::saturating_mul;
/// use arrow2::array::PrimitiveArray;
/// use arrow2::datatypes::DataType;
///
/// let a = PrimitiveArray::from([Some(999_99i128), Some(1_00i128), None, Some(2_00i128)]).to(DataType::Decimal(5, 2));
/// let b = PrimitiveArray::from([Some(10_00i128), Some(2_00i128), None, Some(2_00i128)]).to(DataType::Decimal(5, 2));
///
/// let result = saturating_mul(&a, &b);
/// let expected = PrimitiveArray::from([Some(999_99i128), Some(2_00i128), None, Some(4_00i128)]).to(DataType::Decimal(5, 2));
///
/// assert_eq!(result, expected);
/// ```
Saturated multiplication of two decimal primitive arrays with the same
precision and scale. If the precision and scale is different, then an
InvalidArgumentError is returned. If the result from the multiplication is
larger than the possible number with the selected precision then the
resulted number in the arrow array is the maximum number for the selected
precision.
Saturated multiplication of two decimal primitive arrays with the same precision and scale . If the precision and scale is different then an InvalidArgumentError is returned . If the result from the multiplication is larger than the possible number with the selected precision then the resulted number in the arrow array is the maximum number for the selected precision .
pub fn saturating_mul(
    lhs: &PrimitiveArray<i128>,
    rhs: &PrimitiveArray<i128>,
) -> PrimitiveArray<i128> {
    let (precision, scale) = get_parameters(lhs.data_type(), rhs.data_type()).unwrap();
    let scale = 10i128.pow(scale as u32);
    let max = max_value(precision);
    let op = move |a: i128, b: i128| match a.checked_mul(b) {
        Some(res) => {
            let res = res / scale;
            match res {
                res if res.abs() > max => {
                    if res > 0 {
                        max
                    } else {
                        -max
                    }
                }
                _ => res,
            }
        }
        None => max,
    };
    binary(lhs, rhs, lhs.data_type().clone(), op)
}
pub fn saturating_mul ( lhs : & PrimitiveArray < i128 > , rhs : & PrimitiveArray < i128 > , ) -> PrimitiveArray < i128 > { let ( precision , scale ) = get_parameters ( lhs . data_type ( ) , rhs . data_type ( ) ) . unwrap ( ) ; let scale = 10i128 . pow ( scale as u32 ) ; let max = max_value ( precision ) ; let op = move | a : i128 , b : i128 | match a . checked_mul ( b ) { Some ( res ) => { let res = res / scale ; match res { res if res . abs ( ) > max => { if res > 0 { max } else { - max } } _ => res , } } None => max , } ; binary ( lhs , rhs , lhs . data_type ( ) . clone ( ) , op ) }
Saturated multiplication of two decimal primitive arrays with the same
precision and scale.
Saturated multiplication of two decimal primitive arrays with the same precision and scale .
lhs
&PrimitiveArray<i128>
rhs
&PrimitiveArray<i128>
lhs
&PrimitiveArray<i128>
rhs
&PrimitiveArray<i128>
examples
```
use arrow2::compute::arithmetics::decimal::saturating_mul;
use arrow2::array::PrimitiveArray;
use arrow2::datatypes::DataType.





assert_eq!(result, expected);
```
` ` ` use arrow2 :: compute :: arithmetics :: decimal :: saturating_mul ; use arrow2 :: array :: PrimitiveArray ; use arrow2 :: datatypes :: DataType . assert_eq! ( result expected ) ; ` ` `