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PostgreSQL 16 Administration Cookbook

PostgreSQL 16 Administration Cookbook

By : GIANNI CIOLLI, Boriss Mejías, Jimmy Angelakos, Vibhor Kumar, Simon Riggs
4.8 (27)
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PostgreSQL 16 Administration Cookbook

PostgreSQL 16 Administration Cookbook

4.8 (27)
By: GIANNI CIOLLI, Boriss Mejías, Jimmy Angelakos, Vibhor Kumar, Simon Riggs

Overview of this book

PostgreSQL has seen a huge increase in its customer base in the past few years and is becoming one of the go-to solutions for anyone who has a database-specific challenge. This PostgreSQL book touches on all the fundamentals of Database Administration in a problem-solution format. It is intended to be the perfect desk reference guide. This new edition focuses on recipes based on the new PostgreSQL 16 release. The additions include handling complex batch loading scenarios with the SQL MERGE statement, security improvements, running Postgres on Kubernetes or with TPA and Ansible, and more. This edition also focuses on certain performance gains, such as query optimization, and the acceleration of specific operations, such as sort. It will help you understand roles, ensuring high availability, concurrency, and replication. It also draws your attention to aspects like validating backups, recovery, monitoring, and scaling aspects. This book will act as a one-stop solution to all your real-world database administration challenges. By the end of this book, you will be able to manage, monitor, and replicate your PostgreSQL 16 database for efficient administration and maintenance with the best practices from experts.
Table of Contents (15 chapters)
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13
Other Books You May Enjoy
14
Index

Using GENERATED data columns

You are probably used to the idea that a column can have a default value that’s set by a function; this is how we use sequences to set column values in tables. The SQL Standard provides a new syntax for this, which is referred to as GENERATED ... AS IDENTITY. PostgreSQL supports this, but we won’t discuss that here.

We can also use views to dynamically calculate new columns as if the data had been stored. PostgreSQL 12+ allows the user to specify that columns can be generated and stored in the table automatically, which is easier and faster than writing a trigger to do this. This is a very important performance and usability feature since we can store data that may take significant time to calculate, so this is much better than just using views. We refer to this feature as GENERATED ALWAYS, which also follows the SQL Standard syntax.

How to do it…

Let’s start with an example table:

CREATE TABLE example
( id ...

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