Book Image

PHP Oracle Web Development: Data processing, Security, Caching, XML, Web Services, and Ajax

By : Yuli Vasiliev
Book Image

PHP Oracle Web Development: Data processing, Security, Caching, XML, Web Services, and Ajax

By: Yuli Vasiliev

Overview of this book

Oracle Database gets high marks for performance, reliability, and scalability. Building and deploying your PHP applications on Oracle Database enables you to combine the power and robustness of Oracle and the ease of use, short development time, and high performance of PHP. When used in a complementary way, PHP and Oracle allow you to build high-performance, scalable, and reliable data-driven Web applications with a minimum of effort.When building a PHP/Oracle application, you have two general options. The first is to use an Oracle database just to store data, performing all the operations on that data on the client side; the other is to use the database not only to store data, but also to process it, thus moving data processing to the data. While building the key business logic of a database-driven PHP application inside the database is always a good idea, you should bear in mind that not all of the databases available today allow you to do. The Oracle database, which offers record-breaking performance, scalability, and reliability, does. The partnership of Oracle and the open-source scripting language PHP is an excellent solution for building high-performance, scalable, and reliable data-driven web applications.This 100% practical book is crammed full of easy-to-follow examples. It provides all the tools a PHP/Oracle developer needs to take advantage of the winning combination. It addresses the needs of a wide spectrum of PHP/Oracle developers, placing the emphasis on the most up-to-date topics, such as new PHP and Oracle Database features, stored procedure programming, handling transactions, security, caching, web services, and Ajax.
Table of Contents (16 chapters)
PHP Oracle Web Development
Credits
About the Author
About the Reviewer
Preface

Using VPD to Implement Row-Level Security


Virtual Private Database (VPD) is a powerful Oracle Database security feature that allows you to implement row-level security, centralizing access security mechanisms within the database. The basic idea behind this approach is that each user, when successfully authenticated, is authorized to access only certain rows within a database table or view protected with a VPD security policy.

Note

The Virtual Private Database feature is available only in Oracle Database Enterprise Edition. If you're using another edition of Oracle database, consider using a view-based approach when implementing row-level security, as discussed in the preceding section.

Since a VPD policy can be applied directly to a database table and is enforced whenever data in that table is accessed (directly or indirectly), there is no way for the user to bypass security. To protect a table or view with a VPD policy, you have to perform the following general steps:

  1. 1. Create a PL/SQL function...