Hi Martin,
As per note OSS Note 1651862
Upgrades to products based on SAP NetWeaver 7.1 (including EhP1) and SAP NetWeaver 7.2 are not supported on SQL Server 2012.
Hence, if you plan to upgrade your SAP product based on SAP Netweaver 7.0 (including all EhPs) on SQL Server 2012, you have to upgrade to a SAP product based on SAP NetWeaver 7.3 and higher.
It is clearly mentioned that SAP Netweaver 7.3 and higher will be supported on SQL Server 2012
and when you upgrade to SRM 7.0 Netweaver 7.3 it will support SQL Server 2012.
Hope it helps.
Thanks and Regards,
Kunal Gahlot