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PostgreSQL 11 Server Side Programming Quick Start Guide

You're reading from   PostgreSQL 11 Server Side Programming Quick Start Guide Effective database programming and interaction

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Product type Paperback
Published in Nov 2018
Publisher
ISBN-13 9781789342222
Length 260 pages
Edition 1st Edition
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Author (1):
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Luca Ferrari Luca Ferrari
Author Profile Icon Luca Ferrari
Luca Ferrari
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Table of Contents (12) Chapters Close

The PL/pgSQL Language

The PL/pgSQL language is the default PostgreSQL language to implement functions, procedures, and other general SQL-like executable code.

The idea behind PL/pgSQL is to provide a more flexible and rich language to allow for complex computations, conditionals, iterations, and error handling. PL/pgSQL allows us to group several operations, including SQL statements, into code blocks, which are stored and executed on the server side. This has the benefit of reducing the traffic among the client and the backend.

This chapter will cover the following topics:

  • What a block of code looks like
  • How to execute a block of code with the DO statement
  • How to declare, assign, and use variables, as well as how to print messages
  • Conditionals, iterations (loops), and special variables
  • How to deal with errors and exceptions
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