Execute Immediate fails even with CREATE table grant - oracle

Question

I have a problem where I am creating a table using the execute immediate command in the stored procedure. However I get the error of "insufficient privileges". I checked other threads and made sure that the user has "CREATE TABLE" privilege granted to it. However I still keep seeing the same error.
SQL> select * from USER_SYS_PRIVS;
USERNAME PRIVILEGE ADM
------------------------------ ---------------------------------------- ---
MYUSER CREATE VIEW NO
MYUSER UNLIMITED TABLESPACE NO
SQL> select * from session_privs;
PRIVILEGE
----------------------------------------
CREATE SESSION
UNLIMITED TABLESPACE
CREATE TABLE
CREATE CLUSTER
CREATE VIEW
CREATE SEQUENCE
CREATE PROCEDURE
CREATE TRIGGER
CREATE TYPE
CREATE OPERATOR
CREATE INDEXTYPE
11 rows selected.
The Dummy procedure I created is :
create or replace procedure sp_dummy
as
begin
execute immediate 'Create table Dummy99_99 (Dummy_Field number)';
end sp_dummy;
/
Detailed error :
ERROR at line 1:
ORA-01031: insufficient privileges
ORA-06512: at "MYUSER.SP_DUMMY", line 4
ORA-06512: at line 1
Is there something wrong I am doing ?

Answer 1

You only have create view granted directly to your user. The other system privileges you can see are coming from a role, and roles are disabled in definer's-rights stored procedures. Look in user_role_privs to see while roles you've been granted, and you can see which privileges each role gives you in role_sys_privs (with the role name as the grantee). There could be several layers of roles too.
You would see the same error if you did set role none before trying to create a table statically. Demo with minimal set-up:
create role myrole;
grant create session, create table, create procedure to myrole;
create user myuser identified by mypasswd;
grant myrole to myuser;
grant create view, unlimited tablespace to myuser;
Then as that user:
SQL> connect myuser/mypasswd
Connected.
SQL> select * from user_sys_privs;
USERNAME PRIVILEGE ADM
------------------------------ ---------------------------------------- ---
MYUSER UNLIMITED TABLESPACE NO
MYUSER CREATE VIEW NO
2 rows selected.
SQL> select * from session_privs;
PRIVILEGE
----------------------------------------
CREATE SESSION
UNLIMITED TABLESPACE
CREATE TABLE
CREATE VIEW
CREATE PROCEDURE
5 rows selected.
SQL> Create table Dummy99_99 (Dummy_Field number);
Table created.
SQL> drop table Dummy99_99 purge;
Table dropped.
SQL> set role none;
Role set.
SQL> Create table Dummy99_99 (Dummy_Field number);
Create table Dummy99_99 (Dummy_Field number)
*
ERROR at line 1:
ORA-01031: insufficient privileges
And with your stored procedure version:
SQL> connect myuser/mypasswd
Connected.
SQL> create or replace procedure sp_dummy
2 as
3 begin
4 execute immediate 'Create table Dummy99_99 (Dummy_Field number)';
5 end sp_dummy;
6 /
Procedure created.
SQL> exec sp_dummy;
BEGIN sp_dummy; END;
*
ERROR at line 1:
ORA-01031: insufficient privileges
ORA-06512: at "MYUSER.SP_DUMMY", line 4
ORA-06512: at line 1
To be able to create the table dynamically from a stored procedure, your DBA will need to grant create table directly to your user:
grant create table to myuser;
Then trying the procedure again:
SQL> connect myuser/mypasswd
Connected.
SQL> select * from user_sys_privs;
USERNAME PRIVILEGE ADM
------------------------------ ---------------------------------------- ---
MYUSER UNLIMITED TABLESPACE NO
MYUSER CREATE TABLE NO
MYUSER CREATE VIEW NO
SQL> exec sp_dummy;
PL/SQL procedure successfully completed.
SQL> desc Dummy99_99
Name Null? Type
----------------------------------------- -------- ----------------------------
DUMMY_FIELD NUMBER
Notice that user_sys_privs now shows that create table has been granted directly, which it didn't before, or in the question.
However, it is very unlikely you would ever really want to create objects dynamically, as the schema should be well defined and stable - changes of this type should be controlled and be part of a release process. But as an exercise, you need the direct grant.

Answer 2

When using execute immediate, procedure must explicitly tell oracle that it must run with privileges of a particular user.
AUTHID CURRENT_USER, to use the privileges of user running the procedure.
AUTHID DEFINER, to use the privileges of owner of the procedure.
This is done using AUTHID option while creating a procedure.
CREATE OR REPLACE PROCEDURE PROC_NAME AUTHID CURRENT_USER
IS
.....
I faced a similar issue and got the understanding from:
Execute Immediate within a stored procedure keeps giving insufficient priviliges error

Answer 3

If you are connected as myuser user, you should be able to create the procedure, and execute it to create the table.
The only privileges required to do the task are:
CREATE SESSION
CREATE TABLE
CREATE PROCEDURE
And then execute the procedure after connecting to the user:
SQL> CREATE USER TEST IDENTIFIED BY TEST;
User created.
SQL> GRANT CREATE SESSION, CREATE TABLE, CREATE PROCEDURE TO TEST;
Grant succeeded.
SQL> conn TEST/TEST#pdborcl;
Connected.
SQL> show user
USER is "TEST"
SQL> CREATE OR REPLACE PROCEDURE sp_dummy
2 AS
3 BEGIN
4 EXECUTE immediate 'Create table Dummy99_99 (Dummy_Field number)';
5 END sp_dummy;
6 /
Procedure created.
SQL> EXEC sp_dummy;
PL/SQL procedure successfully completed.
SQL> select * from dummy99_99;
no rows selected

Answer 4

The necessary concessions are as follows:
GRANT CREATE TABLE TO "USER";
GRANT EXECUTE ANY PROCEDURE TO "USER" ;