normalizedScale

Calculate the scale (i.e. number of decimal points) in this BigDecimal, according to how Bigquery represents it.

For BigDecimal instances with nonzero decimal points and 0 trailing 0-digits (e.g. 123.456, 123), this is equivalent to BigDecimal.scale().

For BigDecimal instances with zero decimal points and some trailing 0-digits (e.g. 10, 100), this function returns zero.