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Learning PostgreSQL 10 - Second Edition

You're reading from Learning PostgreSQL 10 - Second Edition

Product type Book

Published in Dec 2017

Publisher

ISBN-13 9781788392013

Pages 488 pages

Edition 2nd Edition

Languages

Concepts

Database Programming

Table of Contents (23) Chapters

Title Page

Credits

About the Authors

About the Reviewers

www.PacktPub.com

Customer Feedback

Preface

Relational Databases

PostgreSQL in Action

PostgreSQL Basic Building Blocks

PostgreSQL Advanced Building Blocks

SQL Language

Advanced Query Writing

Server-Side Programming with PL/pgSQL

OLAP and Data Warehousing

Beyond Conventional Data Types

Transactions and Concurrency Control

PostgreSQL Security

The PostgreSQL Catalog

Optimizing Database Performance

Testing

Using PostgreSQL in Python Applications

Scalability

PostgreSQL objects hierarchy

Understanding the organization of PostgreSQL database logical objects helps with the understanding of object relations and interactions. PostgreSQL databases, roles, tablespaces, settings, and template languages have the same level of hierarchy, as shown in the following diagram:

All objects in the hierarchy are explained in detail as follows.

Template databases

By default, when a database is created, it is cloned from a template database called template1. The template database contains a set of tables, views, and functions, which is used to model the relation between the user-defined database objects. These tables, views, and functions are a part of the system catalog schema called pg_catalog.

Note

The schema is very close to the namespace concept in object-oriented languages. It is often used to organize the database objects, functionality, security access, or to eliminate name collision.

The PostgreSQL server has two template databases:

template1: The default database...

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