---
title: "Built-in Index Access Methods"
id: indextypes
pg_version: "20devel"
---

<a id="indextypes"></a>

# Built-in Index Access Methods

## Table of Contents

- [65.1. B-Tree Indexes](btree.md)
  - [65.1.1. Introduction](btree.md#btree-intro)
  - [65.1.2. Behavior of B-Tree Operator Classes](btree.md#btree-behavior)
  - [65.1.3. B-Tree Support Functions](btree.md#btree-support-funcs)
  - [65.1.4. Implementation](btree.md#btree-implementation)
- [65.2. GiST Indexes](gist.md)
  - [65.2.1. Introduction](gist.md#gist-intro)
  - [65.2.2. Built-in Operator Classes](gist.md#gist-builtin-opclasses)
  - [65.2.3. Extensibility](gist.md#gist-extensibility)
  - [65.2.4. Implementation](gist.md#gist-implementation)
  - [65.2.5. Examples](gist.md#gist-examples)
- [65.3. SP-GiST Indexes](spgist.md)
  - [65.3.1. Introduction](spgist.md#spgist-intro)
  - [65.3.2. Built-in Operator Classes](spgist.md#spgist-builtin-opclasses)
  - [65.3.3. Extensibility](spgist.md#spgist-extensibility)
  - [65.3.4. Implementation](spgist.md#spgist-implementation)
  - [65.3.5. Examples](spgist.md#spgist-examples)
- [65.4. GIN Indexes](gin.md)
  - [65.4.1. Introduction](gin.md#gin-intro)
  - [65.4.2. Built-in Operator Classes](gin.md#gin-builtin-opclasses)
  - [65.4.3. Extensibility](gin.md#gin-extensibility)
  - [65.4.4. Implementation](gin.md#gin-implementation)
  - [65.4.5. GIN Tips and Tricks](gin.md#gin-tips)
  - [65.4.6. Limitations](gin.md#gin-limit)
  - [65.4.7. Examples](gin.md#gin-examples)
- [65.5. BRIN Indexes](brin.md)
  - [65.5.1. Introduction](brin.md#brin-intro)
  - [65.5.2. Built-in Operator Classes](brin.md#brin-builtin-opclasses)
  - [65.5.3. Extensibility](brin.md#brin-extensibility)
- [65.6. Hash Indexes](hash-index.md)
  - [65.6.1. Overview](hash-index.md#hash-intro)
  - [65.6.2. Implementation](hash-index.md#hash-implementation)