Securing sensitive data with Oracle VPD – Technical deep dive

Certainly. The implementation involves creating a PL/SQL policy function (for example, `xxen_vpd_per_phones_fnc`). This function executes dynamically at query time. Inside this function, you determine the running user’s context.

If the security logic determines the user is unauthorized (e.g., `l_user` is not equal to `’APPS’`), the function returns a restrictive predicate such as `’1=2’`. Oracle then dynamically appends this predicate to the user’s query, resulting in zero rows being returned for unauthorized users, effectively hiding all sensitive data.

When implementing custom security, Oracle generally advises caution. However, implementing VPD policies specifically on Blitz Report tables to secure developer SQL access is generally considered safe, as it cannot affect the standard EBS application or accidentally hide operational data from it.

By leveraging Blitz Report’s compatibility with this standard Oracle functionality, you achieve the necessary data governance. It allows consultants to drop their queries directly into Blitz Report , knowing that the VPD mechanism enforces row and column-level control over sensitive data fields.