Особливості індексації у PostgreSQL
Loading...
Date
2025
Authors
Зважій, Дмитро
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
У статті наведено перелік основних типових індексів, реалізованих у PostgreSQL. Розглянуто можливості їх розширення та вдосконалення з урахуванням бізнес-завдань. Проаналізовано підхід Access Methods API. Описано методи життєвого циклу індексу в PostgreSQL. Також запропоновано інтерфейс для реалізації нового індексу в PostgreSQL на основі суфіксного дерева.
Description
This article provides an overview of the main standard index types implemented in PostgreSQL, emphasizing their internal structures, use cases, and efficiency characteristics. The study discusses the possibilities for extending and adapting these index types to meet specific business needs. Special attention is given to PostgreSQL’s extensible architecture and the Access Methods API, which enables the creation of custom indexing solutions. The article analyzes the core functions that define the lifecycle of an index in PostgreSQL, including index creation, scan operations, maintenance, and cost estimation procedures. These functions not only structure the interaction between the planner and the index access methods but also open up opportunities for experimental or domain-specific extensions. As a case study of such extensibility, the article proposes an interface for a suffix tree index that utilizes the Access Methods API. The proposed suffix tree index serves as a demonstration of the flexibility provided by PostgreSQL’s Access Methods API. The article details how the API’s modular architecture allows for the integration of custom data structures, such as suffix trees, by implementing a well-defined set of callback functions governing index creation, scanning, insertion, and cost estimation. This case illustrates how the Access Methods API can be leveraged to expand PostgreSQL’s indexing capabilities beyond traditional use cases, making it a powerful framework for experimental development and research-driven optimization of complex query patterns.
Keywords
пошук рядків, PostgreSQL, суфіксні дерева, SP-GiST, GiST, хеш-таблиці, Б-дерева, Access Methods API, стаття, databases, string search, PostgreSQL, suffix tree, SP-GiST, GiST, hash index, B-tree, Access Methods API
Citation
111