Book Image

Oracle Advanced PL/SQL Developer Professional Guide

By : Saurabh K. Gupta
Book Image

Oracle Advanced PL/SQL Developer Professional Guide

By: Saurabh K. Gupta

Overview of this book

PL/SQL (Procedural Language/Structured Query Language) is Oracle Corporation's procedural extension language for SQL and the Oracle relational database. Server-side PL/SQL is stored and compiled in the Oracle Database and runs within the Oracle executable. With this guide Oracle developers can work towards accomplishing Oracle 11g Advanced PL/SQL Professional certification, which is the second milestone for developers working at the Associate level. The Oracle Advanced PL/SQL Developer Professional Guide helps you master advanced PL/SQL concepts. Besides the clear and precise explanation on advanced topics, it also contains example code and demonstrations, which gives a sense of application and usage to readers.The book gives a deep insight that will help transform readers from mid-level programmers to professional database developers. It aims to cover the advanced features of PL/SQL for designing and optimizing PL/SQL code.This book starts with an overview of PL/SQL as the programming database language and outlines the benefits and characteristics of the language. The book then covers the advanced features that include PL/SQL code writing using collections, tuning recommendations using result caching, implementing VPD to enforce row level security, and much more. Apart from programming, the book also dives deep into the usage of the development tool SQL Developer, employing best practices in database environments and safeguarding the vulnerable areas in PL/SQL code to avoid code injection.
Table of Contents (22 chapters)
Oracle Advanced PL/SQL Developer Professional Guide
Credits
Foreword
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
Index

Configuring the database for the server result cache


In this section, we will learn the configuration of the server-side result cache feature. Oracle 11g adds four new initialization parameters to DBA's basket to configure the caching feature on a database server. These parameters can be set at the database level and session level. Since these settings enable caching at the server side, results from both SQL and PL/SQL namespaces can be cached under the server cache.

The parameters are as follows:

  • RESULT_CACHE_MODE: This parameter controls the caching operation by the server. The server operates the caching feature in three modes—AUTO, MANUAL, and FORCE. Check the server behavior in these modes. The result is held in the cache memory until it is flushed off explicitly. The cached results are invalidated when the result data is updated in the table or the table structure is altered.

    • AUTO: The server decides on its own whether the result of the SQL query has to be cached or not. The server...