Triggers
- Table of Contents
- 37.1. Overview of Trigger Behavior
- 37.2. Visibility of Data Changes
- 37.3. Writing Trigger Functions in C
- 37.4. A Complete Trigger 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 41 ), PL/Tcl ( Chapter 42 ), PL/Perl ( Chapter 43 ), and PL/Python ( Chapter 44 ). 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.