With your projects/experiences, have you already faced that situation ?
Do you already have an IIQ7.2 instance against an Oracle 12cR2 ? do you have some issues ?
As Oracle database 12cR1 goes out of support in July 2018, we have to plan a migration to Oracle 12cR2. However, IdentityIQ 7.2 doesn't support the Oracle database version. (see the post below)