Function mul_bounds

datafusion/expr-common/src/interval_arithmetic.rs:1121–1137

Helper function used for multiplying the end-point values of intervals. Caution:** This function contains multiple calls to `unwrap()`, and may return non-standardized interval bounds. Therefore, it should be used with caution. Currently, it is used in contexts where the `DataType` (`dt`) is validated prior to calling this function, and the following interval creation is standardized with `Interv

(
    dt: &DataType,
    lhs: &ScalarValue,
    rhs: &ScalarValue,
)

/// (`dt`) is validated prior to calling this function, and the following
/// interval creation is standardized with `Interval::new`.
fn mul_bounds<const UPPER: bool>(
    dt: &DataType,
    lhs: &ScalarValue,
    rhs: &ScalarValue,
) -> ScalarValue {
    if lhs.is_null() || rhs.is_null() {
        return ScalarValue::try_from(dt).unwrap();
    }

    match dt {
        DataType::Float64 | DataType::Float32 => {
            alter_fp_rounding_mode::<UPPER, _>(lhs, rhs, |lhs, rhs| lhs.mul_checked(rhs))
        }
        _ => lhs.mul_checked(rhs),
    }
    .unwrap_or_else(|_| handle_overflow::<UPPER>(dt, Operator::Multiply, lhs, rhs))
}

/// Helper function used for dividing the end-point values of intervals.
///