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Learning PostgreSQL 10

Learning PostgreSQL 10 - Second Edition

By : Juba, Volkov
2.3 (6)
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Learning PostgreSQL 10

Learning PostgreSQL 10

2.3 (6)
By: Juba, Volkov

Overview of this book

PostgreSQL is one of the most popular open source databases in the world, supporting the most advanced features included in SQL standards. This book will familiarize you with the latest features released in PostgreSQL 10. We’ll start with a thorough introduction to PostgreSQL and the new features introduced in PostgreSQL 10. We’ll cover the Data Definition Language (DDL) with an emphasis on PostgreSQL, and the common DDL commands supported by ANSI SQL. You’ll learn to create tables, define integrity constraints, build indexes, and set up views and other schema objects. Moving on, we’ll cover the concepts of Data Manipulation Language (DML) and PostgreSQL server-side programming capabilities using PL/pgSQL. We’ll also explore the NoSQL capabilities of PostgreSQL and connect to your PostgreSQL database to manipulate data objects. By the end of this book, you’ll have a thorough understanding of the basics of PostgreSQL 10 and will have the necessary skills to build efficient database solutions.
Table of Contents (17 chapters)
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PostgreSQL function parameters


In Chapter 04PostgreSQL Advanced Building Blocks, we discussed the function categories immutable, stable, and volatile. In this section, we will continue with other function options. These options are not PL/pgSQL language-specific.

Function authorization-related parameters

The first parameters are related to security , when functions are called, they are executed within a security context that determines their privileges. The following options controls the function privileges context:

  • SECURITY DEFINER
  • SECURITY INVOKER

The default value for this option is SECURITY INVOKER, which indicates that the function will be executed with the privileges of the user who calls it. The SECURITY DEFINER functions will be executed using the privileges of the user who created it. For the SECURITY INVOKER functions, the user must have the permissions to execute the CRUD operations that the function implements; otherwise, the function will raise an error. The SECURITY DEFINER functions...

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