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1 About This Document

Purpose, audience, scope, software versions, notation, and responsibility statement.
GASource pages: PDF 5-6Original PDF on GitHub

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1.1 Purpose

The purpose of this document is to provide information about the major new features of open-source RDBMS PostgreSQL 15 (15.0).

1.2 Audience

This document is written for engineers who already know PostgreSQL, such as installation, basic management, etc.

1.3 Scope

This document describes the major difference between PostgreSQL 14 (14.5) and PostgreSQL 15 (15.0). As a general rule, this document examines the features of behavior change. This document does not describe and verify all new features. In particular, the following new features are not included.

  • Bugfix

  • Performance improvement by changing internal behavior

  • Improvement of regression test

  • Operability improvement by psql command tab input

  • Improvement of pgbench command

  • Improvement of documentation, modify typo in the source code

  • Refactoring without a change in behavior

1.4 Software Version

The contents of this document have been verified for the following versions and platforms.

SoftwareVersion
PostgreSQLPostgreSQL 14.5 (for comparison) PostgreSQL 15 (15.0) (October 10, 2022 21:01:24)
Operating SystemRed Hat Enterprise Linux 8 Update 6 (x86-64)
Configure option–with-ssl=openssl –with-python –with-lz4 –with-zstd –with-llvm –with-icu
Table 1 Version

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1.5 The Question, comment, and Responsibility

The contents of this document are not an official opinion of Hewlett Packard Enterprise Japan, G.K. The author and affiliation company do not take any responsibility for the problem caused by the mistake of contents. If you have any comments for this document, please contact Noriyoshi Shinoda (noriyoshi.shinoda@hpe.com), Hewlett Packard Enterprise Japan, LLC.

1.6 Notation

This document contains examples of the execution of the command or SQL statement. Execution examples are described according to the following rules:

NotationDescription
#Shell prompt for Linux root user.
$Shell prompt for Linux general user.
BoldThe user input string.
postgres=#psql command prompt for PostgreSQL administrator.
postgres=>psql command prompt for PostgreSQL general user.
UnderlineImportant output items.
Underline «PASSWORD»Important output items. Replaced by password string.
…Indicates that it is omitted.
Table 2 Examples notation

The syntax is described in the following rules:

NotationDescription
ItalicReplaced by the name of the object which users use, or the other syntax.
[ ]Indicate that it can be omitted.
{ A | B }Indicate that it is possible to select A or B.
…General syntax. It is the same as the previous version.
Table 3 Syntax rules