Navigation : PostgreSQL 13.19 Documentation > Chapter 63. B-Tree Indexes Chapter 63. B-Tree Indexes Chapter 63. B-Tree Indexes Prev Up Part VII. Internals Home Next Table of Contents 63.1. Introduction 63.2. Behavior of B-Tree Operator Classes 63.3. B-Tree Support Functions 63.4. Implementation 63.4.1. B-Tree Structure 63.4.2. Deduplication