Allowing sys.dual DML Grants

Hi,
I'm wondering if anyone has noticed or could confirm if a particular hole was patched.
Here is the situation: Our dba's (I'm a dev) recently installed PSU patch 18031726.
Previous to this, one of our vendor apps had views that used some form of "SELECT [something] FROM DUAL". The views are owned by the schema-owner, and by default the App user is granted Select, Update, Insert, and Delete on all of the schema-owner's views (I'm aware that this is against best practices regarding DML on dual, but sys.dual itself does not have DML grants).
All my googling refers to the notion that all underlying objects of a view must have all permissions that will be then granted to the grantee, including sys.dual.
But again--sys.Dual *only* has SELECT granted to public, no other explict grants are given. However schema-owner granted the DML grants on these views to the 3rd party (app user) *without error*. No DML was ever actually done--but the grants were allowed without error (always logged into Toad as Schema-owner, not sys). My guess is this was an oversight in Oracle, though it's likey any attempt at DML to dual would have errored, even though the viewe had DML grants.
Now, since the patching, when these views are created and the grants are given to app-user by the schema-owner, we see the error Ora 01720 Grant option does not exist for sys.dual
SO bottom line...circumstantially I would like to attribute this new error (now correctly pointing out that Dual has no DML grants) to the security patch, but I can't close this issue in my head until I get some form of confirmation that yes--Oracle found this lack of raising an error on the grants and it was corrected in this patch.
Has anyone come across this behavior, i.e, sudden errors after a patch involving some (misguided and against best practices, admittedly) DML grants on views that include Dual?
Thanks,
Jim

Is the message "Ora 01720 Grant option does not exist for sys.dual"
OR is the message Ora 01720 Grant option does not exist"
Is the schema owner attempting to grant privileges on SYS.DUAL ?
OR is he granting privileges only on his own views ?
Is the schema owner running "CREATE OR REPLACE VIEW..." [Oracle Support note "Post Upgrade To 11.2.0.4, "create or replace view" execution fails with "ORA-01720: Grant Option Does Not Exist" (Doc ID 1628033.1)" has an explanation]
Hemant K Chitale

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UPDATE:
I installed the package ntfs-3g to my system, as per the Arch Wiki instructions, and then set the fstab options as follows:
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Last edited by hotpepperguy (2015-05-30 13:55:31)

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ORA-01720: grant option does not exist for 'SYS.DUAL'
To avoid granting privileges to sys.dual, I tried adding AND OBJECT_NAME < > 'SYS.DUAL' and AND OBJECT_NAME < > 'DUAL' to the query. But that this didn't help.
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DECLARE
v_sql VARCHAR2(4000);
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, object_type
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'PACKAGE' ,'EXECUTE',
'SYNONYM' ,'SELECT' ,
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'MATERIALIZED VIEW','SELECT',
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('FUNCTION','PROCEDURE','PACKAGE','SYNONYM','SEQUENCE','MATERIALIZED VIEW','TABLE','VIEW'))
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END;
/

One of your views must reference DUAL, perhaps indirectly.
If this comes up again you can create an exception to catch the error inside the loop for the current item and continue. Not pretty, but it should work something like (untested)
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Logical Standby Apply Processes Die when granting a user sysdba on Primary

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The error is insufficient privileges.
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>
it cannot be a real table
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http://docs.oracle.com/cd/B28359_01/server.111/b28286/queries009.htm#SQLRF20036
>
Selecting from the DUAL Table
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>
And the Database Concepts doc
http://docs.oracle.com/cd/B28359_01/server.111/b28318/datadict.htm
>
The DUAL Table
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>
And those pseudo-columns you ask about
>
select sysdate,UID,rowid from dual;
>
You can query those from any table but as the doc quote above says you will get as many values as there are rows in the table.

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just a test:
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Connected.
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User created.
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Table created.
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Synonym created.
SQL> grant connect, resource to testsyn;
Grant succeeded.
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Connected.
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no rows selected
SQL> select * from test;
no rows selectedI can select on test altough in my schema there's no test object...
Also look at the dual table (user testsyn):
SQL> select * from dual;
D
X
SQL> select * from user_objects where object_name = 'DUAL';
no rows selected
SQL> select * from all_synonyms where synonym_name = 'DUAL';
OWNER                      SYNONYM_NAME                TABLE_OWNER          TABLE_NAME               DB_LINK
PUBLIC                      DUAL                     SYS               DUALand the next:
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Connected.
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1 row created.
SQL> insert into test(id) values (2);
1 row created.
SQL> insert into test(id) values (3);
1 row created.
SQL> commit;
Commit complete.
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     ID
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      2
      3
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Grant succeeded.
SQL> conn testsyn/testsyn
Connected.
SQL> select * from test;
     ID
      1
      2
      3
SQL> create table test (id number);
Table created.
SQL> select * from test;
no rows selectedThe first, I insert into the table, and as it is granted to the public schema the user testsyn can see te records in the test table where public test synonym points to. then, I created a test table in the testsyn schema, and as there is a more specific test table this one is used...
and one last sample:
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Connected.
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User created.
SQL> grant connect, resource to testsyn2;
Grant succeeded.
SQL> conn testsyn2/testsyn2
Connected.
SQL> select * from test;
     ID
      1
      2
      3
SQL> conn sys/oracle as sysdba
Connected.
SQL> create synonym testsyn2.test for testsyn.test;
Synonym created.
SQL> conn testsyn/testsyn
Connected.
SQL> grant select on test to testsyn2;
Grant succeeded.
SQL> conn testsyn2/testsyn2
Connected.
SQL> select * from test;
no rows selected
SQL> So, quick answer to your question: you only see objects in your own schema, that's why you didn't see your object although you created a public synonym ;).
regards

Which privilege to grant to users?

Hi guys
Normally the sys as sysdba user is the only user who can grant privileges to other users.
I need any user on my database to be able to grant privileges to any other user.
What privilege do I need to grant to each one of my users so that they can grant privileges to each other in the future without having to connect as sys user and grant privileges?
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Cheers
Ciaran

And for individual grants for objects not assigned to a role or perhaps as a standard the object privilege can be granted as
"grant select [etc...] on object_name to sec_admin_user with grant option;"
This allows a non-DBA no special privileged user to handle grant requests.
HTH -- Mark D Powell --

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Ben

Hi
To allow the view owned by sys in a procedure, you have to grant select on that particular view to the owner of that procedure.
Suggestion: may or may not be acceptable: create your own view in system schema (if it has the privilege to select that view else in sys schema) with the required column of the sys view and grant this newly created view to the owner of the procedure.
Regards
Opps! Very late reply
Message was edited by:
Anurag Tibrewal

Allowing sys.dual DML Grants

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