Teiid是一个数据虚拟化系统，让应用程序使用来自多个异构数据存储的数据。
Teiid由一堆工具，组件和创建和执行双向数据的服务所组成。通过抽象和联合、数据存取和集成的实时分布式数据源，无需进行复制或以其他方式移动数据系统的纪录。
Teiid 8.3 Alpha2 发布了，改进内容包括：
TEIID-2311 Permission Conditions - data roles can now specify SQL conditions that will enforce row-based security and physical table insert/update checked constraints. See the Reference Guide for more.
TEIID-2341 Join Planning Improvements - ANSI join structures can now be preserved with the preserve hint, i.e. FROM /*+ PRESERVE */ (tbl1 INNER JOIN tbl2 ON ...), which is similar to the Oracle ORDERED hint. Also sources restricted to only outer joins can have INNER or effectively INNER joins pushed to them.
TEIID-2312 Source security domains - Ldap, Salesforce, google-spreadsheet and ws (basic auth) translators can now define "security-domain" in their resource-adaptor configuration for security. When defined along with caller-identity the logged in user's credentials are passed to source for authentication.
项目主页：http://www.jboss.org/teiid
下载地址：http://www.jboss.org/teiid/downloads.html
来自:开源中国社区
