InfoSets Up to 3. Maximum of 2 IC are recommended to an Infoset. Use left outer joins in InfoSets only when necessary. A left outer join has a significantly worse performance than a corresponding inner join.
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What is a Multiprovider? In this way to make sure metadata buffer is consistent. Three Very Simple Multiproviders The following schematic display of MultiProviders should help to get an idea of the basic concept: Examples Queries based on MultiProviders Three very simple multiprovider queries The following examples should help to better understand how queries work, in particular when certain partproviders are omitted: Examples Multiprovider Query Processing A query defined on a Multiprovider is physically split into sub-queries accessing the partproviders which are processed in parallel in order to improve the performance.
This table can become big and stores also redundant information in case of homogeneous PartProviders. Therefore the system buffers the necessary records in order to improve the runtime. It can be used to delete and recreate the buffered MultiProvider runtime object. During the rebuild, all additional checks of the OLAP processor are executed, and all errors and warnings are displayed.
The query workload is then reduced by checks to determine whether an PartProvider contains any data for the selection range of the query. InfoProviders that are not relevant are then not queried at all. A detailed discussion of this topic can be found in the fiollowing wikwi page:.
SAP BW - Overview of SAP BI
SAP BW - MultiProvider
Multiprovider - how union works?