Hi Sriram,
I am aware of UD Connect & DB Connect methods to extract data into BW from Non SAP systems. However my specific issue is that in the SQL Source System, I'll have access to only SLR Stored procedures(collection of SQL statements) to retrieve data. Unfortunately there is no access to SQL Tables or Views.
So my guess is that I might have to think about extraction via Web service. Does anyone have a step by step document for extraction from SQL Server source system to SAP BW using Web Services?