RE: Disallow access to column of a table
Date: Mon, 5 Oct 2009 16:07:59 -0400
With 10gR2 and probably R1 VPD can be applied at the column level.
From Security manual >>
184.108.40.206 Column-Level VPD
Column-level VPD enables you to enforce row-level security when a security-relevant column is referenced in a query. You can apply column-level VPD to tables and views, but not to synonyms. By specifying the security-relevant column name with the sec_relevant_cols parameter of the DBMS_RLS.ADD_POLICY procedure, the security policy is applied whenever the column is referenced, explicitly or implicitly, in a query. <<
For 9.2 and earlier using a view as Mark Boback suggested is about your only means to limit user access to column data when the use has table privileges other than doing so in the application logic.
- Mark D Powell --
HP Enterprise Services
Phone (313) 592-5148
[mailto:oracle-l-bounce_at_freelists.org] On Behalf Of Tim Gorman
Sent: Monday, October 05, 2009 3:53 PM To: JBECKSTROM_at_gcrta.org; oracle-l-freelists; oracle-db-l Subject: Re: Disallow access to column of a table Jeff, You have to use a view to restrict columns. If permissions or synonyms won't do the job correctly, you canuse VPD to restrict a particular community of users from accessing the table, and permit them to use the view instead, and vice-versa.
Hope this helps!
-----Original Message----- From: Jeffrey Beckstrom [mailto:JBECKSTROM_at_gcrta.org] Sent: Monday, October 5, 2009 01:35 PM To: 'oracle-l-freelists', 'oracle-db-l' Subject: Disallow access to column of a table We have a requirement to disallow accessto a few columns of a table. Any suggestions on how to do this? I was thinking of Virtual Private Database but that would exclude the entire row.
Jeffrey Beckstrom Database Administrator Greater Cleveland Regional Transit Authority 1240 W. 6th Street Cleveland, Ohio 44113Received on Mon Oct 05 2009 - 15:07:59 CDT