Dear friends ...could you please help in clarifying the below doubts on upgradation .
1. Pre-requisites to do Upgradation and Role of ABAPer in this
2. Lets say my VBAK Table is having few Z fields, in upgradation how to handle these Z Fields ? Do we need to add these again after upgradation or these will come automatically with any technique ?
3. What about the userexits ..? Do we need to write again ?
4. Exact use of SPAU and SPDD , as an ABAPer how can use these two T-codes in Upgradation?
5. Steps to carryout for an ABAPer after Post Go-Live of Upgradation
Thanks for your help!!