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16th June 2022:
PostgreSQL 14.4 Released
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Chapter 66. B-Tree Indexes
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Part VII. Internals
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Chapter 66. B-Tree Indexes
Table of Contents
66.1. Introduction
66.2. Behavior of B-Tree Operator Classes
66.3. B-Tree Support Functions
66.4. Implementation
66.4.1. B-Tree Structure
66.4.2. Bottom-up Index Deletion
66.4.3. Deduplication