Tham khảo tài liệu 'sams microsoft sql server 2008- p2', công nghệ thông tin, cơ sở dữ liệu phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Reporting Services Extensions 31 Reporting Services Extensions An extension is a .NET assembly that is invoked by the report processor to perform certain processing functions. There are several types of extensions data processing delivery rendering security authentication and authorization semantic query model generation and event processing. For an extension to be used by a Report Server it has to be installed assuming default SSRS configuration to the C Program Files Microsoft SQL Server Reporting Services ReportServer bin directory and configured in C Program Files Microsoft SQL Server Reporting Services ReportServer . The last part of an extension filename usually implies the extension s functionality. For example the HTML rendering extension s filename is . Custom extensions enable developers to add complementing functionality that is not available in SSRS out of the box. For example a company can implement an extension that delivers reports to a phone or a fax. You can learn more about extensions in Chapter 29 Extending Reporting Services. 2 NOTE This release of SSRS does not allow custom semantic query model-generation or event-processing extensions. Data-Processing Extensions Data-processing extensions retrieve data from the report data source. Some of the tasks performed by data-processing extensions include open connections to data sources analyze queries and return field names pass parameters and retrieve and iterate data sets. Table outlines some of the more popular data-processing extensions included and configured with SSRS. TABLE Data-Processing Extensions Configured with SSRS Extension Description Notes SQL Server Connects to and retrieves data from the SQL Server database engine versions through 2008. OLE DB Connects to and retrieves data from OLE DB-compliant data sources. SQL Server Analysis Services Connects to and .
