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MySQL 5.1 Plugin Development

You're reading from   MySQL 5.1 Plugin Development Extend MySQL to suit your needs with this unique guide into the world of MySQL plugins

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Product type Paperback
Published in Aug 2010
Publisher Packt
ISBN-13 9781849510608
Length 288 pages
Edition 1st Edition
Tools
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Toc

Table of Contents (16) Chapters Close

MySQL 5.1 Plugin Development
Credits
About the Authors
About the Reviewer
1. Preface
1. Compiling and Using MySQL Plugins 2. User Defined Functions FREE CHAPTER 3. Daemon Plugins 4. Information Schema Plugins 5. Advanced Information Schema Plugins 6. Full-text Parser Plugins 7. Practical Full-text Parsers 8. Storage Engine Plugins 9. HTML Storage Engine—Reads and Writes 10. TOCAB Storage Engine — Implementing Indexes Beyond MySQL 5.1

A PHP full-text parser


To show the layout of a full-text parser plugin we will create a simple parser to parse PHP scripts. PHP syntax has a few peculiarities that are not taken into account by the MySQL built-in full-text parser. In particular, all variable names in PHP start with a dollar sign, which is, in fact, a part of the name; a variable $while is not the same as a loop statement while. But a dollar sign is not just another character that can be used in variable names—the string"$foo$bar" contains two PHP variables, not one. Also, variables can have different scopes; a variable foo::$bar is not the same as a variable $bar. Let's try to solve this in our full-text parser plugin. According to the above, it will be a "tokenizer" plugin—a plugin that splits the text into words.

As usual, we start by including the required header files:

#include <mysql/plugin.h>
#include <stdio.h>
#include <ctype.h>

A valid PHP variable name can contain letters, underscores, digits...

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