Change schema name without doing export and import

Question

Is there a way of changing the name of a database schema without having to create a new user and exportng objects from the old schema into the new schema?
Are there any system tables that can be changed to modify schema name without creating a new schema?

Answer 1

SQL> select user#,name from user$ where user#=55;
USER# NAME
55 HR
SQL> desc hr.employees
Name Null? Type
----------------------------------------- -------- ---------------------------- EMPLOYEE_ID NOT NULL NUMBER(6)
FIRST_NAME VARCHAR2(20)
LAST_NAME NOT NULL VARCHAR2(25)
EMAIL NOT NULL VARCHAR2(25)
PHONE_NUMBER VARCHAR2(20)
HIRE_DATE NOT NULL DATE
JOB_ID NOT NULL VARCHAR2(10)
SALARY NUMBER(8,2)
COMMISSION_PCT NUMBER(2,2)
MANAGER_ID NUMBER(6)
DEPARTMENT_ID NUMBER(4)
SQL> update user$ set name='RH' where user#=55;
1 row updated.
SQL> commit;
Commit complete.
SQL> select user#,name from user$ where user#=55;
USER# NAME
55 RH
SQL> desc rh.employees
ERROR:
ORA-04043: object rh.employees does not exist
SQL> desc hr.employees
Name Null? Type
----------------------------------------- -------- ---------------------------- EMPLOYEE_ID NOT NULL NUMBER(6)
FIRST_NAME VARCHAR2(20)
LAST_NAME NOT NULL VARCHAR2(25)
EMAIL NOT NULL VARCHAR2(25)
PHONE_NUMBER VARCHAR2(20)
HIRE_DATE NOT NULL DATE
JOB_ID NOT NULL VARCHAR2(10)
SALARY NUMBER(8,2)
COMMISSION_PCT NUMBER(2,2)
MANAGER_ID NUMBER(6)
DEPARTMENT_ID NUMBER(4)
conclusion:
changing the name in user$ does not change then schema name