java - Prepared statement doesnt work with set role -


i working oracle roles , java , trying set role via prepared statement giving me exception missing or invalid role name here function 

 public static void setrole(string rn,string rp,connection cn){           try{             preparedstatement pstmt = cn.preparestatement("set role ? identified ?");               pstmt.setstring(1, rn);             pstmt.setstring(2, rp);             pstmt.executeupdate();            pstmt.close();           }catch(exception oops){             oops.printstacktrace();;           }       }

any appreciated :d

try pstmnt.execute() rather executeupdate()

some notes appear here

presumeably change in role associated connection object have executed statement against.


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