PostgreSQL

Table of Contents

44.1. PL/Perl Functions and Arguments

44.2. Data Values in PL/Perl

44.3. Built-in Functions

44.3.1. Database Access from PL/Perl

44.3.2. Utility Functions in PL/Perl

44.4. Global Values in PL/Perl

44.5. Trusted and Untrusted PL/Perl

44.6. PL/Perl Triggers

44.7. PL/Perl Event Triggers

44.8. PL/Perl Under the Hood

44.8.1. Configuration

44.8.2. Limitations and Missing Features

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

The main advantage to using PL/Perl is that this allows use, within stored functions, of the manyfold “[.quote]#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.

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