Function pow_decimal256_float

datafusion/functions/src/math/power.rs:275–287

Decimal256 specialized float exponent version.

(base: i256, scale: i8, exp: f64)

/// Decimal256 specialized float exponent version.
fn pow_decimal256_float(base: i256, scale: i8, exp: f64) -> Result<i256, ArrowError> {
    if exp.is_finite() && exp.trunc() == exp && exp >= 0f64 && exp < u32::MAX as f64 {
        return pow_decimal256_int(base, scale, exp as i64);
    }

    if !exp.is_finite() {
        return Err(ArrowError::ComputeError(format!(
            "Cannot use non-finite exp: {exp}"
        )));
    }

    pow_decimal256_float_fallback(base, scale, exp)
}

/// Decimal256 specialized integer exponent version.
fn pow_decimal256_int(base: i256, scale: i8, exp: i64) -> Result<i256, ArrowError> {