PostgreSQL v9.1 Beta 1發佈 關聯式資料庫管理系統

PostgreSQL支援大部分 SQL標準並且提供了許多其他現代特性：複雜查詢、外鍵、觸發器、視圖、事務完整性、多版本併發控制。 同樣，PostgreSQL 可以用許多方法擴展，比如， 通過增加新的HTTP://www.aliyun.com/zixun/aggregation/18278.html">資料類型、函數、操作符、聚集函數、索引方法、 過程語言。 並且，因為許可證的靈活，任何人都可以以任何目的免費使用，修改，和分發 PostgreSQL， 不管是私用，商用，還是學術研究使用。

PostgreSQL 9.1 Beta 1版本資訊：

The PostgreSQL project has released the first Beta of verison 9.1. This Beta release contains all of the features which will be in the final release, which is expected two to four months fr om now. All users should help the project by downloading and testing PostgreSQL 9.1Beta1 as soon as they can.

PostgreSQL 9.1 contains a huge volume of new features, possibly more than any single release of PostgreSQL before. These features also include several innovations which PostgreSQL is the first database system to have. The most anticipated features in this version include:

Synchronous Replication
Per-column collations for multilingual databases
Unlogged Tables
K-Nearest-Neighbor Indexing
Serializable Snapshot Isolation
Writeable Common Table Expressions
SE-Linux Integration
Extensions
SQL/MED attached tables

The PostgreSQL project now depends on you to test 9.1Beta1 in order have a rapid and bug-free 9.1 release. If you are able to help with testing version 9.1, please see the Beta Testing HOWTO

Since this is a Beta version, it is not considered ready for production use. However, the list of features and the APIs is now stable, so application developers can begin developing applications agai nst 9.1. This Beta may be followed by more Beta releases and one or more release candidates before final release. The PostgreSQL developers expect the final version to be released in two to four months, depending on testing and bug-fixi ng.

下載位址： FreeBSD · Linux · Mac OS X · Solaris · Windows