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Oracle Advanced PL/SQL Developer Professional Guide

You're reading from   Oracle Advanced PL/SQL Developer Professional Guide Master advanced PL/SQL concepts along with plenty of example questions for 1Z0-146 examination with this book and ebook

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Product type Paperback
Published in May 2012
Publisher Packt
ISBN-13 9781849687225
Length 440 pages
Edition 1st Edition
Languages
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Author (1):
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Saurabh K. Gupta Saurabh K. Gupta
Author Profile Icon Saurabh K. Gupta
Saurabh K. Gupta
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Table of Contents (22) Chapters Close

Oracle Advanced PL/SQL Developer Professional Guide
Credits
Foreword
About the Author
Acknowledgement
About the Reviewers
www.PacktPub.com
Preface
1. Overview of PL/SQL Programming Concepts FREE CHAPTER 2. Designing PL/SQL Code 3. Using Collections 4. Using Advanced Interface Methods 5. Implementing VPD with Fine Grained Access Control 6. Working with Large Objects 7. Using SecureFile LOBs 8. Compiling and Tuning to Improve Performance 9. Caching to Improve Performance 10. Analyzing PL/SQL Code 11. Profiling and Tracing PL/SQL Code 12. Safeguarding PL/SQL Code against SQL Injection Attacks Answers to Practice Questions Index

PRAGMA INLINE


We learned the effect of the optimization level and subprogram inlining on the program performance. Once PLSQL_OPTIMIZER_LEVEL is set by the DBA, the optimization strategy is transparent to the end user. For this reason, Oracle introduced a pragma (PRAGMA INLINE) to authorize the user to explicitly inline a subprogram of its own choice. In the last section, we saw that PLSQL_OPTIMIZE_LEVEL 2 will prioritize the subprograms for inlining as per its own intelligence, while PLSQL_OPTIMIZE_LEVEL 3 will forcibly inline all the subprogram calls. While the latter setting might skip our expected subprogram, the latter setting might inline the expected subprogram along with the unnecessary inlining(inlinings).

Note

PRAGMA INLINE is the fifth pragma in Oracle after AUTONOMOUS_TRANSACTION, EXCEPTION_INIT, RESTRICT_REFERENCES, and SERIALLY_REUSABLE.

PRAGMA INLINE can be used with PLSQL_OPTIMIZER_LEVEL 2 and PLSQL_OPTIMIZER_LEVEL 3. When PLSQL_OPTIMIZE_LEVEL is set to 2, the pragma can be...

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