SAP BW7.3 With HANA

Dear Experts,

I need some suggestion in SAP BW7.3 with HANA

1. After migration of SAP BW7.3 from (Oracle , DB2...) to HANA database  , the cubes structure will it change, because HANA data base  table design is both Column  and Row based design , but Standard cubes tables have only Row level store

2.Could please guide the How we have to migrate the BW Standard cubes to HANA Cubes.

Regards,

kavitha.