Book Image

PostgreSQL 14 Administration Cookbook

By : Simon Riggs, Gianni Ciolli
Book Image

PostgreSQL 14 Administration Cookbook

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)

Granting user access to a table

A user needs to have access to a table in order to perform any actions on it.

Getting ready

Make sure that you have the appropriate roles defined and that privileges are revoked from the PUBLIC role:

CREATE GROUP webreaders;

How to do it…

We had to grant access to the schema in order to allow access to the table. This suggests that access to a given schema can be used as a fast and extreme way of preventing any access to any object in that schema. Otherwise, if you want to allow some access, you must use specific GRANT and REVOKE statements, as needed:

GRANT USAGE ON SCHEMA someschema TO webreaders;

It is often desirable to give a group of users similar permissions to a group of database objects. To do this, you first assign all the permissions to a proxy role (also known as a permission group), and then assign the group to selected users, as follows...