ORA-47264: error updating Realm Authorization to string for Realm string, string
Cause: An unexpected error occurred updating the realm authorization
Action: Please review the definition for accuracy and retry the operation
ORA-47264错误涉及到Realm权限更新，是由于Realm权限更新过程中发生错误导致的。
ORA-47264 error occurs when:
A user attempts to update Realm Authorization to some value that already exists in the Realm Authorization table and,
The function the user is attempting to perform is not allowed
当一个用户试图更新一个已存在于Realm Authorization表中的值或者尝试要执行的函数，但不被允许时，ORA-47264的错误就会发生。
1.首先，通过执行可以查看哪些函数可以应用于Realm Authorization，以及未被允许的函数：
select a.auth_name,b.pse_name from system.authz_realms a, system.pse_functions b where a.auth_func_name = b.pse_name;
2.然后，尝试用一些修改这个Realm Authorization的值：
alter system set #REALM_AUTH_NAME_# = #AUTH_VALUE#;
3.最后，尝试重新存取Realm Functions：
grant realm auth #AUTH_FUNC_NAME_# to #REALM_AUTH_NAME_#;