Function try_convert_intermediate_decimal_to_scalar 

pub fn try_convert_intermediate_decimal_to_scalar<S: Scalar>(
    d: &BigDecimal,
    target_precision: Precision,
    target_scale: i8,
) -> DecimalResult<S>

Fallibly attempts to convert an IntermediateDecimal into the native proof-of-sql Scalar backing store. This function adjusts the decimal to the specified target_precision and target_scale, and validates that the adjusted decimal does not exceed the specified precision. If the conversion is successful, it returns the Scalar representation; otherwise, it returns a DecimalError indicating the type of failure (e.g., exceeding precision limits).

Arguments

• d - The IntermediateDecimal to convert.
• target_precision - The maximum number of digits the scalar can represent.
• target_scale - The scale (number of decimal places) to use in the scalar.

Errors

Returns DecimalError::InvalidPrecision error if the number of digits in the decimal exceeds the target_precision before or after adjusting for target_scale, or if the target precision is zero.