Why is this an issue?
Anchored types, i.e. those specified using either
%ROWTYPE, cannot be constrained. Trying to do so results in
PLS-00573: cannot constrain scale, precision, or range of an anchored type being raised.
Noncompliant code example
foo DUAL.DUMMY%TYPE(42); -- Non-Compliant - raises PLS-00573
foo DUAL.DUMMY%TYPE; -- Compliant