17th September 2020: PostgreSQL 13 RC 1 Released!

9.0 Alpha 4 Available Now

Posted on 2010-02-24

The fourth alpha release for PostgreSQL version 9.0, 9.0alpha4, is now available. This alpha contains several new major features added since the previous alpha. Please download, install, and test it to give us early feedback on the features being developed for the next version of PostgreSQL.

Features added in Alpha4 include:

  • Streaming Replication for binary log-based replication of PostgreSQL
  • New in-memory, high-performance Listen/Notify queue
  • Automatic row-count return to drivers on SELECT queries
  • ROWS PRECEDING and ROWS FOLLOWING windowing functions

These new major features mean that we need you to participate in testing them. If you are able to help with organized alpha testing, please see the Alpha/Beta testing page

Alphas are not stable and should never be used in production; they are for testing new features only. There is no guarantee that any features or APIs present in the alphas will be present, or the same, in the final release. Previous alpha versions were called "8.5"; the 9.0 alpha is the same version of PostgreSQL, renamed for the release. Additional alpha releases, or a beta release, will be available for testing in a few weeks.

More detail is available in the Release Notes included with each alpha

Alpha4 is currently available in source code form only. Binary packages for some operating systems will be prepared in the coming days.

This post has been migrated from a previous version of the PostgreSQL website. We apologise for any formatting issues caused by the migration.