Naseem
checking the quite good and meanwhile extensive documentation on https://help.sap.com/hana_applicance will pretty quickly tell you two things:
1. there is no direct ABAP processing within SAP HANA. If you want ABAP, then you need to use the SAP NetWeaver application server
2. there are several different options available to implement business logic in SAP HANA. A meanwhile very easy to consume one is ABAP managed stored procedures.
With that you write code ins SAP HANA SQL script and call it from your ABAP application.
I gues I gave you enough ends to pick up now. In fact there is a whole community here in SCN that is about ABAP on HANA.
I am sure you'll have no problem finding it with that fancy little search box on the upper right corner of this webpage.
- Lars