DOC HOME SITE MAP MAN PAGES GNU INFO SEARCH PRINT BOOK
 

Chapter 34. Triggers

Table of Contents
34.1. Overview of Trigger Behavior
34.2. Visibility of Data Changes
34.3. Writing Trigger Functions in C
34.4. A Complete Example

This chapter provides general information about writing trigger functions. Trigger functions can be written in most of the available procedural languages, including PL/pgSQL (Chapter 37), PL/Tcl (Chapter 38), PL/Perl (Chapter 39), and PL/Python (Chapter 40). After reading this chapter, you should consult the chapter for your favorite procedural language to find out the language-specific details of writing a trigger in it.

It is also possible to write a trigger function in C, although most people find it easier to use one of the procedural languages. It is not currently possible to write a trigger function in the plain SQL function language.