Book Image

Mastering PostgreSQL 9.6

By : Hans-Jürgen Schönig
Book Image

Mastering PostgreSQL 9.6

By: Hans-Jürgen Schönig

Overview of this book

PostgreSQL is an open source database used for handling large datasets (Big Data) and as a JSON document database. It also has applications in the software and web domains. This book will enable you to build better PostgreSQL applications and administer databases more efficiently. We begin by explaining the advanced database design concepts in PostgreSQL 9.6, along with indexing and query optimization. You will also see how to work with event triggers and perform concurrent transactions and table partitioning, along with exploring SQL and server tuning. We will walk you through implementing advanced administrative tasks such as server maintenance and monitoring, replication, recovery and high availability, and much more. You will understand the common and not-so-common troubleshooting problems and how you can overcome them. By the end of this book, you will have an expert-level command of the advanced database functionalities and will be able to implement advanced administrative tasks with PostgreSQL.

Related Content you might be interested in

Current Title:

Small book image
Mastering PostgreSQL 9.6
Hans-Jürgen Schönig
May, 2017 | 416 pages
Small book image
Learning PostgreSQL 10
Salahaldin Juba | Andrey Volkov
Dec, 2017 | 488 pages
Small book image
Learning PostgreSQL 11
Salahaldin Juba | Andrey Volkov
Jan, 2019 | 556 pages
Small book image
PostgreSQL 16 Administration Cookbook
Boris Mejias | Simon Riggs | Gianni Ciolli | Vibhor Kumar | Dimitrios Angelakos
Dec, 2023 | 636 pages
Table of Contents (14 chapters)
Preface
Preface
What this book covers
What you need for this book
Who this book is for
Conventions
Reader feedback
Customer support
Free Chapter
1
PostgreSQL Overview
PostgreSQL Overview
What is new in PostgreSQL 9.6?
Summary
2
Understanding Transactions and Locking
Understanding Transactions and Locking
Working with PostgreSQL transactions
Understanding basic locking
Making use of FOR SHARE and FOR UPDATE
Understanding transaction isolation levels
Observing deadlocks and similar issues
Utilizing advisory locks
Optimizing storage and managing cleanup
Summary
3
Making Use of Indexes
Making Use of Indexes
Understanding simple queries and the cost model
Improving speed using clustered tables
Understanding additional B-tree features
Introducing operator classes
Understanding PostgreSQL index types
Achieving better answers with fuzzy searching
Understanding full-text search - FTS
Summary
4
Handling Advanced SQL
Handling Advanced SQL
Introducing grouping sets
Making use of ordered sets
Understanding hypothetical aggregates
Utilizing windowing functions and analytics
Writing your own aggregates
Summary
5
Log Files and System Statistics
Log Files and System Statistics
Gathering runtime statistics
Creating log files
Summary
6
Optimizing Queries for Good Performance
Optimizing Queries for Good Performance
Learning what the optimizer does
Understanding execution plans
Understanding and fixing joins
Enabling and disabling optimizer settings
Partitioning data
Adjusting parameters for good query performance
Summary
7
Writing Stored Procedures
Writing Stored Procedures
Understanding stored procedure languages
Understanding various stored procedure languages
Improving stored procedure performance
Using stored procedures
Summary
8
Managing PostgreSQL Security
Managing PostgreSQL Security
Managing network security
Digging into row-level security - RLS
Inspecting permissions
Reassigning objects and dropping users
Summary
9
Handling Backup and Recovery
Handling Backup and Recovery
Performing simple dumps
Replaying backups
Handling global data
Summary
10
Making Sense of Backups and Replication
Making Sense of Backups and Replication
Understanding the transaction log
Transaction log archiving and recovery
Setting up asynchronous replication
Upgrading to synchronous replication
Making use of replication slots
Summary
11
Deciding on Useful Extensions
Deciding on Useful Extensions
Understanding how extensions work
Making use of contrib modules
Other useful extensions
Summary
12
Troubleshooting PostgreSQL
Troubleshooting PostgreSQL
Approaching an unknown database
Inspecting pg_stat_activity
Checking for slow queries
Inspecting the log
Checking for missing indexes
Checking for memory and I/O
Understanding noteworthy error scenarios
Summary
13
Migrating to PostgreSQL
Migrating to PostgreSQL
Migrating SQL statements to PostgreSQL
Moving from Oracle to PostgreSQL
Moving from MySQL or MariaDB to PostgreSQL
Summary

Understanding various stored procedure languages

As already stated previously in this chapter, PostgreSQL gives you the power to write stored procedures in various languages. The following options are available and shipped along with the PostgreSQL core:

  • SQL
  • PL/pgSQL
  • PL/Perl and PL/PerlU
  • PL/Python
  • PL/Tcl and PL/TclU

SQL is the obvious choice to write stored procedures, and it should be used whenever possible as it gives the most freedom to the optimizer. However, if you want to write slightly more complex code, PL/pgSQL might be the language of your choice. It offers flow control and a lot more. In this chapter, some of the more advanced and less known features of PL/pgSQL will be shown (this chapter is not meant to be a complete tutorial on PL/pgSQL).

Then the core contains code to run stored procedures in Perl. Basically, the logic is the same here. Code will be passed as a string and executed by Perl. Remember...

Previous Section
End of Section 3
Next Section