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Contents
Preface

Overview
Installation Guide
Quick Start & Tours
Sample ODBC & JDBC Applications
Conceptual Overview
Administration
Data Access Interfaces
SQL Reference
SQL Procedure Language Guide
Database Event Hooks
Database Startup
Database Connections
Database Logins
Database Disconnections
Database Shutdown
SQL Statement Preparation
SQL Parse Tree
WebDAV Logins
Associating Auxiliary Data With A Connection
Data Replication, Synchronization and Transformation Services
Web Application Development
XML Support
RDF Data Access and Data Management
Web Services
Runtime Hosting
Internet Services
Free Text Search
TPC C Benchmark Kit
Using Virtuoso with Tuxedo
Appendix
Virtuoso Functions Guide

Abstract

Virtuoso provides a number of hooks that enable you to traps events within the database such as startup, shutdown, connection, disconnection and SQL compilation events.

Table of Contents

11.1. Database Startup
11.2. Database Connections
11.3. Database Logins
11.4. Database Disconnections
11.5. Database Shutdown
11.6. SQL Statement Preparation
11.7. SQL Parse Tree
11.7.1. Notes on Special Features of the Parse Tree
11.7.2. SQL Security and Parse Trees
11.7.3. Debugging with Parse Trees
11.8. WebDAV Logins
11.9. Associating Auxiliary Data With A Connection

Virtuoso allows the dba to set hooks for various events, such as:

These events are intercepted by calling a SQL procedure if one is defined.

In the following we will examine each hook in the context of a simplified database security system. The system will record all logins and logouts and will enforce custom security rules on reading a specific application table.