On March 31, 2015 SAP has been certified to run on Oracle Database 12.1.0.2:
https://blogs.oracle.com/UPGRADE/entry/sap_is_now_certified_on
As of June 30, 2015, Oracle Database In-Memory is supported and certified for SAP environments for all SAP products based on SAP NetWeaver 7.x. on Unix/Linux, Windows and Oracle Engineered Systems platforms running Oracle Database 12c – in single instance and Oracle Oracle Real Application Clusters deployments.
Oracle Database 12c is now the only database for SAP customers based on In-Memory Technology which is fully supported for SAP BW and SAP OLTP applications.
For requirements, restrictions, and implementation details see the documents below.
- SAP note 2178980
. - Using SAP NetWeaver with Oracle Database In-Memory – an Oracle technical white paper
http://scn.sap.com/docs/DOC-64863.
- Oracle Database 12c In-Memory Option. The Top Tier of a Multi-tiered Database Architecture
Oracle/SAP Newsletter article
http://www.oracle.com/us/solutions/sap/nl23-db12c-imo-en-2209396.pdf