数据虚拟化系统 Teiid 7.6 CR1 发布

     <p>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。<img title="teiid.gif" border="0" alt="teiid.gif" align="right" src="https://simg.open-open.com/show/0db2f59572273cefdf142cf8709d0126.gif" width="90" height="90" /></p>    <p>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。<br /> <span style="font-weight:bold;">项目地址：</span><a style="font-weight:bold;" href="/misc/goto?guid=4958183978056190836" target="_blank">http://www.jboss.org/teiid</a></p>    <p><br /> <img title="数据虚拟化系统 Teiid 7.6 CR1 发布" border="0" alt="数据虚拟化系统 Teiid 7.6 CR1 发布" src="https://simg.open-open.com/show/860ccbcc93da5ee471a969fa55055155.png" width="414" height="336" /></p>    <p>Teiid 7.6 CR1 发布了，修复了前一版本的 bug 外，还包含如下新特性：</p>    <ul>     <li><strong>View removal hint</strong> - the NO_UNNEST hint now also applies to FROM  clause views and subqueries. It will instruct the planner to not perform view flattening. </li>     <li><strong>Non-blocking statement execution</strong> - Teiid JDBC extensions TeiidStatement and TeiidPreparedStatement can be used to submit queries against embedded connections with a callback to process results in a non-blocking manner. </li>     <li><strong>NON_STRICT limit hint</strong> - the NON_STRICT hint can be used with unordered limits to tell the optimizer to not inhibit push operations even if the results will not be consistent with the logical application of the limit. </li>     <li><strong>Source Hints</strong> - user and transformation queries can specify a meta source hint, e.g. SELECT /*+ sh my-oracle:'leading' */ * FROM TBL. The hint information will be passed to the translator. The Oracle translator will by default treat the source hint as an Oracle hint.  See the Reference and Developers Guide for more. </li>     <li><strong>Hive Translator</strong> - Hive translator has been added as a technology preview.</li>    </ul>