Unsupported versions: 7.1
This documentation is for an unsupported version of PostgreSQL.
You may want to view the same page for the current version, or one of the other supported versions listed above instead.


The first part of this manual is the description of the client-side programming interfaces and support libraries for various languages. The second part explains the PostgreSQL approach to extensibility and describe how users can extend PostgreSQL by adding user-defined types, operators, aggregates, and both query language and programming language functions. After a discussion of the PostgreSQL rule system, we discuss the trigger and SPI interfaces. The third part documents the procedural languages available in the PostgreSQL distribution.

Proficiency with Unix and C programming is assumed.