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Mastering PostgreSQL 11

You're reading from   Mastering PostgreSQL 11 Expert techniques to build scalable, reliable, and fault-tolerant database applications

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Product type Paperback
Published in Oct 2018
Publisher
ISBN-13 9781789537819
Length 446 pages
Edition 2nd Edition
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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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Table of Contents (15) Chapters Close

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

Understanding how extensions work

Before digging into the extensions that are available, it is a good idea to take a look at how extensions work in the first place. Understanding the inner workings of the extension machinery can be quite beneficial.

Let's take a look at the syntax first:

test=# \h CREATE EXTENSION 
Command: CREATE EXTENSION
Description: install an extension
Syntax:
CREATE EXTENSION [ IF NOT EXISTS ] extension_name
[ WITH ] [ SCHEMA schema_name ]
[ VERSION version ]
[ FROM old_version ]
[ CASCADE ]

When you want to deploy an extension, simply call the CREATE EXTENSION command. It will check for the extension and load it into your database. Note that the extension will be loaded into a database and not into the entire database instance.

If we are loading an extension, we can decide on the schema that we want to use. Many extensions...

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