數據虛擬化系統，Teiid 8.12.4 發布

Teiid是一個數據虛擬化系統，讓應用程序使用來自多個異構數據存儲的數據。

Teiid 8.12.4 發布，更新如下：

• [TEIID-3874] -         Invalid source query for subquery referencing a common table

• [TEIID-3879] -         Error during state transfer prevents a node from loading later

• [TEIID-3880] -         Missing dependency in "org.apache.olingo" module

• [TEIID-3882] -         Unable to convert Geometry Collection to GeoJSON

• [TEIID-3884] -         Queries with NextToken failing with NPE

• [TEIID-3885] -         Redshift - conversion to time does not work

• [TEIID-3886] -         Redshift - query ends with error message "Query cancelled on user's request"

• [TEIID-3887] -         Redshift - RS does not support ASCII function

• [TEIID-3888] -         Redshift - there is not function SUBSTR (RS uses SUBSTRING)

• [TEIID-3889] -         asynch start transaction / rollback throws exception

• [TEIID-3891] -         MetadataFactory create function from method does not account for primitive return types

• [TEIID-3892] -         There is no pg type for geometry

• [TEIID-3895] -         OData - metadata returns primary key with attribute "Nullable=true"

• [TEIID-3897] -         dimensional check for ewkb is incorrect

• [TEIID-3900] -         OData - malformed URL causes NPE

• [TEIID-3876] -         Add an option to import RowId as binary

• [TEIID-3899] -         Allow Web Services translator to retrieve metadata without source connection

• [TEIID-3270] -         Allow UDFs to call Teiid functions

• [TEIID-3419] -         Add ability to set a default role across all VDBs

• [TEIID-3870] -         Add ability to properly qualify package objects

• [TEIID-3890] -         Add a redshift translator

• [TEIID-3865] -         too much logging of source cancel

• [TEIID-3866] -         with clause used by subquery repeated in the subquery

• [TEIID-3875] -         Many info messages upon startup that start with:  TEIID31173 Inherent

• [TEIID-3893] -         Handling of binary odbc parameters needs improved

• [TEIID-3896] -         When error occurs in the materialization process, an ERROR should be logged instead of DEBUG

• [TEIID-3901] -         MetadataFactory should account for user defined aggregate functions

更多內容請看：發行說明

下載：released

Teiid由一堆工具，組件和創建和執行雙向數據的服務所組成。通過抽象和聯合、數據存取和集成的實時分布式數據源，無需進行復制或以其他方式移動數據系統的紀錄。

簡而言之：Teiid 可以讓你用 JDBC + SQL 來訪問企業的任何數據，并可對這些不同源的數據進行聯合查詢。

來自： http://www.oschina.net//news/69880/teiid-8124