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Mastering PostgreSQL 15

You're reading from   Mastering PostgreSQL 15 Advanced techniques to build and manage scalable, reliable, and fault-tolerant database applications

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Product type Paperback
Published in Jan 2023
Publisher Packt
ISBN-13 9781803248349
Length 522 pages
Edition 5th Edition
Languages
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Author (1):
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Hans-Jürgen Schönig Hans-Jürgen Schönig
Author Profile Icon Hans-Jürgen Schönig
Hans-Jürgen Schönig
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Toc

Table of Contents (16) Chapters Close

Preface 1. Chapter 1: PostgreSQL 15 Overview 2. Chapter 2: Understanding Transactions and Locking FREE CHAPTER 3. Chapter 3: Making Use of Indexes 4. Chapter 4: Handling Advanced SQL 5. Chapter 5: Log Files and System Statistics 6. Chapter 6: Optimizing Queries for Good Performance 7. Chapter 7: Writing Stored Procedures 8. Chapter 8: Managing PostgreSQL Security 9. Chapter 9: Handling Backup and Recovery 10. Chapter 10: Making Sense of Backups and Replication 11. Chapter 11: Deciding on Useful Extensions 12. Chapter 12: Troubleshooting PostgreSQL 13. Chapter 13: Migrating to PostgreSQL 14. Index 15. Other Books You May Enjoy

Achieving better answers with fuzzy searching

Performing precise searching is not the only thing expected by users these days. Modern websites have taught users to always expect a result, regardless of their input. If you search on Google, there will always be an answer, even if the user input is wrong, full of typos, or simply pointless. People expect good results, regardless of the input data.

Taking advantage of pg_trgm

To do fuzzy searching with PostgreSQL, you can add the pg_trgm extension. To activate this extension, just run the following command:

test=# CREATE EXTENSION pg_trgm;
CREATE EXTENSION

The pg_trgm extension is pretty powerful, and to show you what it is capable of, I have compiled some sample data consisting of 2,354 names of villages and cities here in Austria.

Our sample data can be stored in a simple table:

test=# CREATE TABLE t_location (name text);
CREATE TABLE

My company website has all the data available, and PostgreSQL allows you to load...

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