Guys.. good to see your comments.
@Ruchit Khushu : I did not get time to reply and you did the needful. Thanks.
@Reagan Benjamin: You are right in your point that we can do the patching with "DDIC", there is no doubt. If user is a copy of DDIC then surely it will have sufficient access "Log on to client 000 as a user with SAP_ALL authorization"
Will you make a new question as you guys have answered the question