Working With Sap Bw Data Using Externalized Csv Files In Framework Manager - IBM Cognos User Manual

Results
You can now use this model to create PowerCubes for use with the desired IBM
Cognos component, accessing the dimensional and fact data from the original SAP
BW data source. For more information, see the section "Create a Model" in the
Cognos Transformer User Guide.
Working with SAP BW Data Using Externalized CSV Files in
Framework Manager
When you externalize query subjects and dimensions into formats that you can use
in other applications, there are special considerations. When extracting data from
SAP BW using Framework Manager, you must understand the distinction that
Framework Manager makes between different types of dimensions. Each type of
dimension exhibits a different behavior when it is externalized, and can be
modified before externalizing.
In Transformer versions 7.x, 8.1, and 8.2, you can leverage your SAP BW data
using a Framework Manager package in which the query subjects and dimensions
are externalized using CSV files. Transformer can use the CSV files as a data
source to create a model and generate PowerCubes. CSV files are also supported in
Transformer version 8.3 but it is recommended that you use package support for
dimensional data and CSV files for fact data.
In this version of Transformer, using Framework Manager packages published to
Content Manager is the preferred method to leverage SAP BW data. For general
information about creating packages, see "Create or Modify a Package" in the
Framework Manager User Guide. For SAP-specific information about creating
packages, see Working with SAP BW Data Using a Package in Framework
Manager.
Extract Size
The Extract Size data source property within Framework Manager controls the
amount of data retrieved from SAP BW at any one time.
If this setting is negative, zero, or empty, a single query is issued to SAP BW to
extract the characteristic data.
If this setting is a positive value, Framework Manager issues multiple queries to
SAP BW, each of which returns approximately the number of megabytes specified
by the Extract Size property.
This feature can reduce the overall size of the query result on the SAP BW server.
Overall query execution may take longer, but for large characteristics, not using
this feature may result in consumption of a user's allotted memory space on the
SAP BW server.
The entire data for a characteristic dimension will be in memory within
Framework Manager prior to the production of an extract file. It is important that
only the required query items be extracted from SAP BW to ensure that an extract
does not fail due to memory allocation errors within Framework Manager.
Appendix E. Guidelines for Working with SAP BW Data for Use in Transformer
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