Navigation : PostgreSQL 17.1 Documentation > Chapter 64. Built-in Index Access Methods Chapter 64. Built-in Index Access Methods Chapter 64. Built-in Index Access Methods Prev Up Part VII. Internals Home Next Table of Contents 64.1. B-Tree Indexes 64.1.1. Introduction 64.1.2. Behavior of B-Tree Operator Classes 64.1.3. B-Tree Support Functions 64.1.4. Implementation 64.2. GiST Indexes 64.2.1. Introduction 64.2.2. Built-in Operator Classes 64.2.3. Extensibility 64.2.4. Implementation 64.2.5. Examples 64.3. SP-GiST Indexes 64.3.1. Introduction 64.3.2. Built-in Operator Classes 64.3.3. Extensibility 64.3.4. Implementation 64.3.5. Examples 64.4. GIN Indexes 64.4.1. Introduction 64.4.2. Built-in Operator Classes 64.4.3. Extensibility 64.4.4. Implementation 64.4.5. GIN Tips and Tricks 64.4.6. Limitations 64.4.7. Examples 64.5. BRIN Indexes 64.5.1. Introduction 64.5.2. Built-in Operator Classes 64.5.3. Extensibility 64.6. Hash Indexes 64.6.1. Overview 64.6.2. Implementation