Navigation : PostgreSQL 14.5 Documentation > Chapter 64. B-Tree Indexes Chapter 64. B-Tree Indexes Chapter 64. B-Tree Indexes Prev Up Part VII. Internals Home Next Table of Contents 64.1. Introduction 64.2. Behavior of B-Tree Operator Classes 64.3. B-Tree Support Functions 64.4. Implementation 64.4.1. B-Tree Structure 64.4.2. Bottom-up Index Deletion 64.4.3. Deduplication