Book Image

PostgreSQL Administration Cookbook, 9.5/9.6 Edition - Third Edition

Book Image

PostgreSQL Administration Cookbook, 9.5/9.6 Edition - Third Edition

Overview of this book

PostgreSQL is a powerful opensource database management system; now recognized as the expert's choice for a wide range of applications, it has an enviable reputation for performance and stability. PostgreSQL provides an integrated feature set comprising relational database features, object-relational, text search, Geographical Info Systems, analytical tools for big data and JSON/XML document management. Starting with short and simple recipes, you will soon dive into core features, such as configuration, server control, tables, and data. You will tackle a variety of problems a database administrator usually encounters, from creating tables to managing views, from improving performance to securing your database, and from using monitoring tools to using storage engines. Recipes based on important topics such as high availability, concurrency, replication, backup and recovery, as well as diagnostics and troubleshooting are also given special importance. By the end of this book, you will have all the knowledge you need to run, manage, and maintain PostgreSQL efficiently.
Table of Contents (13 chapters)

Writing a psql script that exits on the first error

The default mode for the psql script tool is to continue processing when it finds an error. This sounds dumb, but it exists for historical compatibility only. There are some easy and mostly permanent ways to avoid this, so let's look at them.

Getting ready

Let's start with a simple script, with a command we know will fail:

$ $EDITOR test.sql
mistake1;
mistake2;
mistake3;

Execute the following script using psql to see what the results look like:

$ psql -f test.sql
psql:test.sql:1: ERROR: syntax error at or near "mistake1"
LINE 1: mistake1;
^
psql:test.sql:2: ERROR: syntax error at or near "mistake2"
LINE 1: mistake2;
^
psql:test.sql:3...