Book Image

Learning PostgreSQL 11 - Third Edition

By : Salahaldin Juba, Andrey Volkov
Book Image

Learning PostgreSQL 11 - Third Edition

By: Salahaldin Juba, Andrey Volkov

Overview of this book

PostgreSQL is one of the most popular open source database management systems in the world, and it supports advanced features included in SQL standards. This book will familiarize you with the latest features in PostgreSQL 11, and get you up and running with building efficient PostgreSQL database solutions from scratch. Learning PostgreSQL, 11 begins by covering the concepts of relational databases and their core principles. You’ll explore the Data Definition Language (DDL) and commonly used DDL commands supported by ANSI SQL. You’ll also learn how to create tables, define integrity constraints, build indexes, and set up views and other schema objects. As you advance, you’ll come to understand Data Manipulation Language (DML) and server-side programming capabilities using PL/pgSQL, giving you a robust background to develop, tune, test, and troubleshoot your database application. The book will guide you in exploring NoSQL capabilities and connecting to your database to manipulate data objects. You’ll get to grips with using data warehousing in analytical solutions and reports, and scaling the database for high availability and performance. By the end of this book, you’ll have gained a thorough understanding of PostgreSQL 11 and developed the necessary skills to build efficient database solutions.
Table of Contents (18 chapters)

Transaction in functions and procedures

Prior to PostgreSQL 11, you could not control transactions explicitly inside a function. The function would always run within a transaction. This caused some difficulty in performing a number of development and administrative tasks. For example, a database administrator has performed bulk indexing inside a function, and, after a certain period of time, the administrator cancelled the function execution due to a time or performance constraint. In the preceding scenario, all work done is lost due to the nature of the transaction. From a development perspective, being able to control transactions inside a function is important because it allows the developers to control transactions based on business logic requirements.

PostgreSQL 11 provides a new feature, which is CREATE PROCEDURE. The procedure has a different transaction behavior than a...