Error while using DBMS_METADATA.GET_DDL package.

Question

Hi all,
I want script of DDL of all tables in Database not in particular schema,
As I am using below query
SELECT DBMS_METADATA.GET_DDL('TABLE',u.table_name)
FROM ALL_TABLES u
WHERE u.nested='NO'
AND (u.iot_type is null or u.iot_type='IOT')
but it gives error as below.
ORA-31603: object "ICOL$" of type TABLE not found in schema "SCOTT"
It should give DDL of all tables, also I am not having DBA Privs.
Please help me.
Thanks & Regards
Rajiv.

Answer 1

It could be helpful if you have a look into [url http://download.oracle.com/docs/cd/B19306_01/appdev.102/b14258/d_metada.htm#i1016867]documentation.
Security Model
The object views of the Oracle metadata model implement security as follows:
Nonprivileged users can see the metadata of only their own objects.
SYS and users with SELECT_CATALOG_ROLE can see all objects.
Nonprivileged users can also retrieve public synonyms, system privileges granted to them, and object privileges granted to them or by them to others. This also includes privileges granted to PUBLIC.
If callers request objects they are not privileged to retrieve, no exception is raised; the object is simply not retrieved.
If nonprivileged users are granted some form of access to an object in someone else's schema, they will be able to retrieve the grant specification through the Metadata API, but not the object's actual metadata.
In stored procedures, functions, and definers-rights packages, roles (such as SELECT_CATALOG_ROLE) are disabled. Therefore, such a PL/SQL program can only fetch metadata for objects in its own schema. If you want to write a PL/SQL program that fetches metadata for objects in a different schema (based on the invoker's possession of SELECT_CATALOG_ROLE), you must make the program invokers-rights.
Best regards
Maxim