Book Image

PostgreSQL 14 Administration Cookbook

By : Simon Riggs, Gianni Ciolli
5 (1)
Book Image

PostgreSQL 14 Administration Cookbook

5 (1)
By: Simon Riggs, Gianni Ciolli

Overview of this book

PostgreSQL is a powerful, open-source database management system with an enviable reputation for high performance and stability. With many new features in its arsenal, PostgreSQL 14 allows you to scale up your PostgreSQL infrastructure. With this book, you'll take a step-by-step, recipe-based approach to effective PostgreSQL administration. This book will get you up and running with all the latest features of PostgreSQL 14 while helping you explore the entire database ecosystem. You’ll learn how to tackle a variety of problems and pain points you may face as a database administrator such as creating tables, managing views, improving performance, and securing your database. As you make progress, the book will draw attention to important topics such as monitoring roles, validating backups, regular maintenance, and recovery of your PostgreSQL 14 database. This will help you understand roles, ensuring high availability, concurrency, and replication. Along with updated recipes, this book touches upon important areas like using generated columns, TOAST compression, PostgreSQL on the cloud, and much more. By the end of this PostgreSQL book, you’ll have gained the knowledge you need to manage your PostgreSQL 14 database efficiently, both in the cloud and on-premise.
Table of Contents (14 chapters)

Making views updatable

PostgreSQL supports the SQL standard CREATE VIEW command, which supports automatic UPDATEINSERT, and DELETE commands, provided they are simple enough.

Note that certain types of updates are forbidden just because they are either impossible or impractical to derive a corresponding list of modifications on the constituent tables. We'll discuss those issues here.

Getting ready

First, you need to consider that only simple views can be made to receive insertions, updates, and deletions easily. The SQL standard differentiates between views that are simple and updatable, and more complex views that cannot be expected to be updatable.

So, before we proceed, we need to understand what a simple updatable view is and what it is not. Let's start with the cust table:

postgres=# SELECT * FROM cust;
 customerid | firstname | lastname | age