Documentation → PostgreSQL 9.1

Supported Versions: Current (17) / 16 / 15 / 14 / 13

Development Versions: 18 / devel

Unsupported versions: 12 / 11 / 10 / 9.6 / 9.5 / 9.4 / 9.3 / 9.2 / 9.1 / 9.0 / 8.4 / 8.3 / 8.2 / 8.1 / 8.0 / 7.4 / 7.3 / 7.2 / 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.

PostgreSQL 9.1.24 Documentation
Prev	Up		Next

Chapter 35. Extending SQL

Table of Contents

35.1. How Extensibility Works

35.2. The PostgreSQL Type System

35.2.1. Base Types
35.2.2. Composite Types
35.2.3. Domains
35.2.4. Pseudo-Types
35.2.5. Polymorphic Types

35.3. User-defined Functions

35.4. Query Language (SQL) Functions

35.4.1. SQL Functions on Base Types
35.4.2. SQL Functions on Composite Types
35.4.3. SQL Functions with Parameter Names
35.4.4. SQL Functions with Output Parameters
35.4.5. SQL Functions with Variable Numbers of Arguments
35.4.6. SQL Functions with Default Values for Arguments
35.4.7. SQL Functions as Table Sources
35.4.8. SQL Functions Returning Sets
35.4.9. SQL Functions Returning TABLE
35.4.10. Polymorphic SQL Functions
35.4.11. SQL Functions with Collations

35.5. Function Overloading

35.6. Function Volatility Categories

35.7. Procedural Language Functions

35.8. Internal Functions

35.9. C-Language Functions

35.9.1. Dynamic Loading
35.9.2. Base Types in C-Language Functions
35.9.3. Version 0 Calling Conventions
35.9.4. Version 1 Calling Conventions
35.9.5. Writing Code
35.9.6. Compiling and Linking Dynamically-loaded Functions
35.9.7. Composite-type Arguments
35.9.8.