@JingsongLi PTAL

One noteworthy aspect is the equivalence comparison of Decimal. In Java, Decimal uses compareTo to achieve equivalence, which can maintain equality even at different scales.

Good catch! I have fixed this.

Datum now has a manual PartialEq impl instead of derive(PartialEq). The Decimal variant normalizes both sides to a common scale before comparing unscaled values, matching Java Decimal.equals() which delegates to compareTo() == 0

For example, Decimal(unscaled=10, scale=1) and Decimal(unscaled=100, scale=2) are now considered equal since both represent 1.0.