What is the role of W Jaffer in season year 2012?
W Jaffer refers to Player_name = 'W Jaffer'; in season year 2012 refers to Season_Year = 2012; role refers to Role_Desc
SELECT T4.Role_Desc FROM Player AS T1 INNER JOIN Player_Match AS T2 ON T1.Player_Id = T2.Player_Id INNER JOIN Match AS T3 ON T2.Match_Id = T3.Match_Id INNER JOIN Rolee AS T4 ON T2.Role_Id = T4.Role_Id INNER JOIN Season AS T5 ON T3.Season_Id = T5.Season_Id WHERE T1.Player_name = 'W Jaffer' AND T5.Season_Year = 2012