The Red Hat Fuse 7.5 Supported Configurations document:
has a list of supported databases and database drivers in the section "Supported Database Integrations".
For Oracle DB, we have
Oracle 12c r2
Oracle 12c r2 RAC
in the list and they are quite old version.
We need to consider to add Oracle 18c (released in 2018) and Oracle 19c (released in 2019) to this supported database integration list.