BW术语表.doc

A Aggregate An aggregate is a subset of an InfoCube. The objective when using aggregates is to reduce I/O volume.The BW OLAP processor selects an appropriate aggregate during a query run or a navigation step. If no appropriate aggregate exists, the BW OLAP processor retrieves data from the original InfoCube instead. For examples, assume you may have 10 dimensions and each one have 10 value, that means you may have up to 10^10 possible records. If high level manager often access the report focus revenue in 2008 by customer, thats mean only 2 dimension are involved. You can do aggregate and it may only contain 2 dimensions with 100 records. It reduce the I/O and improve the performance. Aggregate rollup Aggregate rollup is a procedure to update aggregates with new data loads. Reference Aggregate Application component Application components are used to organize InfoSources. They are similar to the InfoAreas used with InfoCubes. The maximum number of characters allowed for the technical name is 32. Authorization An authorization defines what a user can do, and to which SAP objects. For example, a user with an authorization can display and execute, but not change, a query. Authorizations are defined using authorization objects. Authorization object An authorization object is used to define user authorizations. It has fields with values to specify authorized activities, such as display and execution, on authorized business objects, such as queries. The maximum number of characters allowed for the technical name is 10. Authorization profile An authorization profile is made up of multiple authorizations. The maximum number of characters allowed for the technical name is 10. B BEx Short for Business Explorer. It includes following tools to present the reports to end user: Analyzer? / Web Application Designer / Report Designer / Web Analyzer. Bitmap index A bitmap index uses maps of bits to locate records in a table. Bitmap indices are very effective for Boolean operations of