Hi Anil ,
Yes we have SRM 7.0 EHP3 SP2 installed currently with HANA database. But we do not have any HANA related set up maintained in the SRM systems. They are just a copy of our previous non HANA systems. So, currently they appear to be working just like our previous systems(without HANA) atleast from the end user perspective. We have also not come across any issue as such.
What we are trying to do now is understand the functional benefits of HANA and are trying to set up the config/related settings on the SRM systems to utilise HANA to the fullest.