Re: Hiding data model

From: Tim Gorman <>
Date: Wed, 28 Jan 2015 05:57:57 -0700
Message-ID: <>


Nothing can be "hidden" from the SYSDBA privilege in Oracle database. VPD is not enabled for SYSDBA, either.

Hope this helps...



P.S. I know I shouldn't ask, and you may have to kill me rather than reveal the secret, but I'm going to ask anyway: what is so special about the data model?

P.P.S. Codd's fourth law for RDBMS is to access the metadata using the same language as used for data access. So it's not just Oracle, it's SQL.

P.P.P.S. If you really want to obfuscate the data model, then perhaps consider a schemaless NoSQL store, such as Hadoop?

P.P.P.P.S. To implement in SQL, perhaps consider the lessons of ""?

On 1/28/15 4:39, Harmandeep Singh wrote:
> Hi Experts,
> We are having data model for our product, which we do not want to
> expose to our customers. That is we want even the DBA of customer with
> sys privileges should not understand /access the data model( like
> table definitions, columns ).
> I am aware of options like VPD, which is data level security feature
> as per my understanding.
> Please let me know your thoughts
> Thanks,
> Harmandeep Singh

Received on Wed Jan 28 2015 - 13:57:57 CET

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