Question - What Should Be The Approach For Writing A Bdc Program ?
Answer -
STEP 1: CONVERTING THE LEGACY SYSTEM DATA TO A FLAT FILE to internal table CALLED "CONVERSION".
STEP 2: TRANSFERRING THE FLAT FILE INTO SAP SYSTEM CALLED "SAP DATA TRANSFER".
STEP 3: DEPENDING UPON THE BDC TYPE
- call transaction(Write the program explicitly)
- create sessions (sessions are created and processed. If success data will transfer).