Chapter 54. Overview of PostgreSQL Internals

Chapter 54. Overview of PostgreSQL Internals
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Table of Contents

54.1. The Path of a Query

54.2. How Connections Are Established

54.3. The Parser Stage

54.3.1. Parser
54.3.2. Transformation Process

54.4. The PostgreSQL Rule System

54.5. Planner/Optimizer

54.5.1. Generating Possible Plans

54.6. Executor

Author

This chapter originated as part of [sim98] Stefan Simkovics' Master's Thesis prepared at Vienna University of Technology under the direction of O.Univ.Prof.Dr. Georg Gottlob and Univ.Ass. Mag. Katrin Seyr.

This chapter gives an overview of the internal structure of the backend of PostgreSQL. After having read the following sections you should have an idea of how a query is processed. This chapter is intended to help the reader understand the general sequence of operations that occur within the backend from the point at which a query is received, to the point at which the results are returned to the client.