Full-Text Search in PostgreSQL: A Gentle Introduction
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Chapter 1. FTS Introduction

Table of Contents
1.1. Full Text Search in databases
1.2. FTS Overview
1.2.1. Tsquery and tsvector
1.2.2. FTS operator
1.3. Basic operations
1.3.1. Obtaining tsvector
1.3.2. Obtaining tsquery
1.3.3. Ranking search results
1.3.4. Getting results
1.3.5. Dictionaries
1.3.6. Stop words
1.4. FTS features
1.5. FTS Limitations
1.6. A Brief History of FTS in PostgreSQL
1.6.1. Pre-tsearch
1.6.2. Tsearch v1
1.6.3. Tsearch v2
1.6.4. FTS current
1.7. Links
1.8. FTS Todo
1.9. Acknowledgements
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Full-Text Search in PostgreSQL Full Text Search in databases