When MySQL first emerged into the IT world in the mid-1990s, it had few of the characteristics normally associated with commercial relational databases. Features such as transactional support, subqueries, views, and stored procedures were conspicuously absent. Subsequent releases provided most of the missing features, and nowwith the introduction of stored procedures, functions, and triggers in MySQL 5 (as well as updateable views and a data dictionary)the feature gap between MySQL and other relational database systems is narrow indeed.
The introduction of stored programs (our generic term for stored procedures, functions, and triggers) has significance beyond simply winning a features war with competitive database systems. Without stored programs, MySQL cannot claim full compliance with a variety of standards, including ANSI/ISO standards that describe how a DBMS should execute stored programs. Furthermore, judicious use of stored programs can lead to greater database security and integrity and can improve overall application performance and maintainability. We outline these advantages in greater detail later in this chapter.
In short, stored programsprocedures, functions, and triggersadd significantly to the capabilities of MySQL, and a working knowledge of stored programming should be an essential skill for the MySQL professional.
This chapter introduces the MySQL stored program language, its origins, and its capabilities. It also offers a guide to additional resources for MySQL stored program developers and some words of overall development advice.
Part I: Stored Programming Fundamentals
Introduction to MySQL Stored Programs
MySQL Stored Programming Tutorial
Blocks, Conditional Statements, and Iterative Programming
Using SQL in Stored Programming
Part II: Stored Program Construction
Creating and Maintaining Stored Programs
MySQL Built-in Functions
Part III: Using MySQL Stored Programs in Applications
Using MySQL Stored Programs in Applications
Using MySQL Stored Programs with PHP
Using MySQL Stored Programs with Java
Using MySQL Stored Programs with Perl
Using MySQL Stored Programs with Python
Using MySQL Stored Programs with .NET
Part IV: Optimizing Stored Programs
Stored Program Security
Tuning Stored Programs and Their SQL
Basic SQL Tuning
Advanced SQL Tuning
Optimizing Stored Program Code
Best Practices in MySQL Stored Program Development