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Advanced Oracle PL/SQL Developer's Guide (Second Edition)

You're reading from   Advanced Oracle PL/SQL Developer's Guide (Second Edition) Master the advanced concepts of PL/SQL for professional-level certification and learn the new capabilities of Oracle Database 12c

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Product type Paperback
Published in Feb 2016
Publisher
ISBN-13 9781785284809
Length 428 pages
Edition 2nd 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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Toc

Table of Contents (14) Chapters Close

Preface 1. Overview of PL/SQL Programming Concepts FREE CHAPTER 2. Oracle 12c SQL and PL/SQL New Features 3. Designing PL/SQL Code 4. Using Collections 5. Using Advanced Interface Methods 6. Virtual Private Database 7. Oracle SecureFiles 8. Tuning the PL/SQL Code 9. Result Cache 10. Analyzing, Profiling, and Tracing PL/SQL Code 11. Safeguarding PL/SQL Code against SQL injection 12. Working with Oracle SQL Developer Index

Executing Java programs from PL/SQL


Like the C programs, Java programs can also natively execute in the Oracle Database. However, unlike C external programs, the Java classes and Java source files are stored as schema objects in the database.

External Java programs are not executed through OS-based shared libraries but use a Java shared library or libunit for execution. Libunits are similar to dynamically linked libraries but they are mapped one-to-one to the Java class and are not sharable across the other methods.

The libunit is loaded and executed by the Java Virtual Machine (JVM) which resides natively in the Oracle Database. The JVM uses the Java pool component of the shared global area to execute the Java-based external program.

Loading a Java class into a database

A Java program can be loaded into an Oracle Database by using the CREATE JAVA statement or the LOADJAVA utility.

The CREATE JAVA statement enables the Java Virtual Machine library manager to load a Java class into the Oracle...

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