Chapter 45. PL/Perl — Perl Procedural Language

Table of Contents

45.1. PL/Perl Functions and Arguments
45.2. Data Values in PL/Perl
45.3. Built-in Functions
45.3.1. Database Access from PL/Perl
45.3.2. Utility Functions in PL/Perl
45.4. Global Values in PL/Perl
45.5. Trusted and Untrusted PL/Perl
45.6. PL/Perl Triggers
45.7. PL/Perl Event Triggers
45.8. PL/Perl Under the Hood
45.8.1. Configuration
45.8.2. Limitations and Missing Features

PL/Perl is a loadable procedural language that enables you to write PostgreSQL functions and procedures in the Perl programming language.

The main advantage to using PL/Perl is that this allows use, within stored functions and procedures, of the manyfold string munging operators and functions available for Perl. Parsing complex strings might be easier using Perl than it is with the string functions and control structures provided in PL/pgSQL.

To install PL/Perl in a particular database, use CREATE EXTENSION plperl.


If a language is installed into template1, all subsequently created databases will have the language installed automatically.


Users of source packages must specially enable the build of PL/Perl during the installation process. (Refer to Chapter 16 for more information.) Users of binary packages might find PL/Perl in a separate subpackage.