RE: Trigger Question

From: Mercadante, Thomas F (LABOR) <"Mercadante,>
Date: Fri, 20 Feb 2009 08:59:37 -0500
Message-ID: <ABB9D76E187C5146AB5683F5A07336FF023CA305_at_EXCNYSM0A1AJ.nysemail.nyenet>

Could you issue the grant to an Oracle Role and solve the issue that way?

-----Original Message-----
From: [] On Behalf Of Herring Dave - dherri Sent: Friday, February 20, 2009 8:34 AM
To:; Cc:
Subject: RE: Trigger Question

This is EXACTLY what I had to do. I was at the mercy of a poorly designed system and had to use this type of thing as a kind of hack. The trigger is an AFTER CREATE trigger and submits an execute of a procedure through DBMS_JOB (obviously this was 9i), with a sysdate+1/64800 delay.

The GRANT can be locked out due to developer code performing other statements immediately after creating the table, so in my procedure I try up to 10 times (1 second waits inbetween) before giving up on the requested grant.

David C. Herring  | DBA, Acxiom Automotive

630-944-4762 office | 630-430-5988 cell | 630-944-4989 fax 1501 Opus Pl | Downers Grove, IL, 60515 | U.S.A. |

From: [] On Behalf Of Mathias Zarick Sent: Friday, February 20, 2009 2:24 AM
Subject: RE: Trigger Question

Hi Scott,

you cannot grant directly out of the trigger, but you could submit a job that does this for you. Set the interval to null and the job will disappear after execution. but take care, trigger should not fire to often as this might fill up the job queue intolerably.


  v_job binary_integer;

  dbms_job.submit(v_job,'grant_select(''' || ora_dict_obj_owner || ''',''' || ora_dict_obj_name || ''');');

HTH Mathias

From: [] On Behalf Of Scott Canaan Sent: Thursday, February 19, 2009 10:21 PM To:
Subject: Trigger Question
   I have a question on how to grant select access to a table as part of the table create process, inside the database.  I was hoping to use a system trigger (after create on schema).  In testing, I created the following trigger and stored procedure:

create or replace trigger test_create_trig after create on schema when (ora_dict_obj_type in ('TABLE','VIEW')) declare

create or replace procedure grant_select (obj_owner varchar2, obj_name varchar2)

pragma autonomous_transaction;
   execute immediate 'grant select on ' || obj_owner || '.' || obj_name ||
                     ' to test_user2';


When I try to create a table as test_user, which I want select permission on for test_user2, I get the following error stack:

SQL> create table test2 (a number);
create table test2 (a number)
ERROR at line 1:
ORA-00604: error occurred at recursive SQL level 1
ORA-04020: deadlock detected while trying to lock object TEST_USER.TEST2
ORA-06512: at "TEST_USER.GRANT_SELECT", line 4
ORA-06512: at line 5


   The request is to have all tables (and views) owned by one user to be readable by another user, but not by giving "select any table" to the other user.  I granted all of the existing tables and views, but want to automatically be able to grant future ones as they are created.  It seems like there should be a way to do this and it shouldn't be too hard, without relying on the developers to remember to put the grants in their code.  I can't believe I'm the first one to have this issue.

We are using Oracle

Thank you,

Scott Canaan '88 ( (585) 475-7886
"Life is like a sewer, what you get out of it depends on what you put into it." - Tom Lehrer.

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Received on Fri Feb 20 2009 - 07:59:37 CST

Original text of this message