Book Image

PostgreSQL Development Essentials

By : Manpreet Kaur, Baji Shaik
Book Image

PostgreSQL Development Essentials

By: Manpreet Kaur, 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
About the Authors
About the Reviewers

Dealing with DDLs

In PHP, we have the pg_query() function that we use to execute all kinds of SQL statement. We can use this function to execute either DDL or DML statements. This function takes two arguments; one is the db connection resource and the other is an SQL statement. To track the SQL statement status, we have the pg_last_error() function, which takes the db connection as its argument.

Now, let's try to create a test table using the preceding getDBConnection()

$sql =<<<EOF 
CREATE TABLE test(d char(1)); 
if (pg_query($con, $sql)) { 
  echo"test table is created successfully\n"; 
  echo"Failed in creating table\n"; 
$ phptest.php 
Successfully made connection to PostgreSQL 
pg connection pid is 91659 
test table is created successfully...