Book Image

PostgreSQL Development Essentials

By : Baji Shaik
Book Image

PostgreSQL Development Essentials

By: Baji Shaik

Overview of this book

PostgreSQL is the most advanced open source database in the world. It is easy to install, configure, and maintain by following the documentation; however, it’s difficult to develop applications using programming languages and design databases accordingly. This book is what you need to get the most out of PostgreSQL You will begin with advanced SQL topics such as views, materialized views, and cursors, and learn about performing data type conversions. You will then perform trigger operations and use trigger functions in PostgreSQL. Next we walk through data modeling, normalization concepts, and the effect of transactions and locking on the database. The next half of the book covers the types of indexes, constrains, and the concepts of table partitioning, as well as the different mechanisms and approaches available to write efficient queries or code. Later, we explore PostgreSQL Extensions and Large Object Support in PostgreSQL. Finally, you will perform database operations in PostgreSQL using PHP and Java. By the end of this book, you will have mastered all the aspects of PostgreSQL development. You will be able to build efficient enterprise-grade applications with PostgreSQL by making use of these concepts
Table of Contents (17 chapters)
PostgreSQL Development Essentials
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface

Summary


In this chapter, we closely observed how transactions and locking work. We noticed how, in a single-user database, transactions are useful because they allow you to bind together SQL statements in a single atomic unit. We also covered the multiuser environment for the transactions. Then, we moved to the standard-isolation levels of ANSI SQL for their undesirable phenomena and how we can eliminate different types of undesirable behavior by defining various levels of transaction consistency. We also covered how we could end up with performance degradation by eliminating desirable features. Therefore, it becomes very essential to strike a balance between the ideal behavior and acceptable performance. We explored locking, and using simple techniques we can overcome the risk of deadlocks—a situation where two or more applications can freeze, waiting for the other to complete. We also did explicit locking, which provides the functionality to lock specific rows in a table or the entire...