Views and the CAE

Is someone can you please explain to me what is the advantage of the popular virtual private database? I learned this feature not all on time and I wonder why use such complicated, configuration as simple representations can give the same result.

Thank you.

Benefits of using Oracle Virtual Private database policies

Based security policies on objects of database rather than requests

Control how Oracle database evaluates the political functions

Based security policies on objects of database rather than requests
Attach security policies Oracle database tables, views, or synonyms-virtual private database, rather than to implement in all your applications access controls, offers the following benefits:

Security. Associating a policy with a database table, view, or synonym can solve a problem of potentially serious application security. Suppose that a user is allowed to use an application, and then drawing on the privileges that application, changes improperly database using an ad hoc query tool, such as SQL * more. By attaching security policies directly to the tables, views, or synonyms, fine grain access control ensures that the same level of security is in effect, regardless of the way in which a user accesses the data.

Simplicity. You add the security policy to a table, view, or synonym only once, rather than adding several times to each of your applications based on tables, based on the view or focus on the synonym.

Flexibility. You may have a security policy for SELECT statements, another for INSERT statements and more for the UPDATE and DELETE statements. For example, you might want to allow clerks of human resources have SOME privileges for all records of employees in their division, but update only salaries for employees in their division, whose name starts with A through F. In addition, you can create multiple strategies for each table, view, or synonym.

Control how Oracle database evaluates the political functions
Several political functions running times can affect performance. You can control the exercise of political functions by configuring how Oracle database implements cache Oracle virtual private database predicates. The following options are available:

Evaluate the policy once for each request (static policies).

Evaluate the policy only when an application in function changes context political (contextual policy).

Evaluate the policy whenever it is executed (policies).

Tags: Database

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