Book Image

PostgreSQL 11 Server Side Programming Quick Start Guide

By : Luca Ferrari
Book Image

PostgreSQL 11 Server Side Programming Quick Start Guide

By: Luca Ferrari

Overview of this book

PostgreSQL is a rock-solid, scalable, and safe enterprise-level relational database. With a broad range of features and stability, it is ever increasing in popularity.This book shows you how to take advantage of PostgreSQL 11 features for server-side programming. Server-side programming enables strong data encapsulation and coherence. The book begins with the importance of server-side programming and explains the risks of leaving all the checks outside the database. To build your capabilities further, you will learn how to write stored procedures, both functions and the new PostgreSQL 11 procedures, and create triggers to perform encapsulation and maintain data consistency. You will also learn how to produce extensions, the easiest way to package your programs for easy and solid deployment on different PostgreSQL installations.
Table of Contents (12 chapters)

Inter-Process Communication (IPC)

PostgreSQL allows for a dynamic Inter-Process Communication (IPC) where each backend process can communicate with other backend processes. While PostgreSQL provides a way to signal a backend process in order to terminate it—a kind of extreme IPC—the kind of communication this section focuses on is the asynchronous event model, which is known as a channel.

Asynchronous events

PostgreSQL provides a mechanism to publish events over a channel. Subscribers can subscribe to this channel to receive these events. The whole communication process happens asynchronously.

Each event is sent over a channel, which is identified by a unique name and can have an optional payload, in the form...