Framework Manager Considerations - IBM Cognos User Manual

v NULL values
v # symbols
v REST_H
v Not assigned
Because such duplicate tokens can cause problems in Cognos Transformer, in
unique levels for example, we recommend that you assign filters to the dimension
so that they do not appear in the imported data.
Finally, remember to select only those query items needed to generate your filtered
data.

Framework Manager Considerations

When extracting the measure dimension from an SAP BW query, the Extract Size
property of the data source controls the amount of data retrieved from the SAP
BW server at one time. Model query subjects are externalized in a different
manner, regardless of whether they contain fact query items or not. In this
scenario, the setting has no affect on the SAP BW server, but it does limit the
amount of memory Framework Manager allocates at any one time to retrieve the
data.
Note that filters defined on the key figures dimension are not enforced when
extracting data from an SAP BW query. To obtain performance benefits of
extracting data from an SAP BW query, filters must be defined in an SAP BW
query.
In addition, any calculations defined within the key figures dimension are ignored.
These may be defined either within the SAP BW query in BEx, or in a model query
subject in Framework Manager.
Each characteristic extracted must contain at least one query item from the lowest
level of its hierarchy (if there is one) to provide linkage with the key figures
extract. You should include the business key query item from each of the levels of
each dimension, depending on the level of granularity that you are trying to
achieve.
Use of Variables to Externalize Key Figures from an SAP BW
Query
The volume of transactions within an SAP BW query is such that, in most cases,
the use of a single query to extract the data from SAP BW will exceed the memory
allocated to a user on an SAP BW server. In Framework Manager, you can use a
single optional variable to extract fact data from an SAP BW query in reasonably
sized sections.
To use this feature, one characteristic included in the SAP BW query (but not
included as a free characteristic) is assigned a variable that conforms to the
following restrictions:
v It must be a single value.
v It must be optional.
v It must not have a default value.
v It can be defined on the characteristic or a presentation hierarchy.
If an SAP BW query contains such a variable and the key figures dimension is
externalized, Framework Manager runs a query for each possible value associated
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IBM Cognos Transformer Version 10.1.1: User Guide