InSAP BW/4HANA, theHigh Cardinalityflag is used to optimize the handling of characteristics with a very large number of distinct values (e.g., transaction IDs, timestamps). However, enabling this flag imposes certain restrictions on how the characteristic can be used. Below is an explanation of the correct answers and why they are valid.
A. You cannot use this characteristic as a navigation attribute for another characteristic.
When theHigh Cardinalityflag is set, the characteristic cannot serve as anavigation attributefor another characteristic. Navigation attributes are used to provide additional descriptive information for a characteristic, but high-cardinality characteristics are not suitable for this purpose due to their large size and potential performance impact.
[: SAP BW/4HANA enforces this restriction to ensure optimal performance and avoid excessive memory consumption during query execution., B. You cannot use navigation attributes for this characteristic., Similarly, a characteristic with theHigh Cardinalityflag cannot havenavigation attributesassigned to it. Navigation attributes add complexity and increase the volume of data processed during reporting, which is incompatible with the optimization goals of high-cardinality characteristics., Reference: SAP BW/4HANA restricts the use of navigation attributes for high-cardinality characteristics to maintain efficient query performance., , Incorrect Options:C. You cannot load more than 2 billion master data records for this characteristic., This statement is incorrect. TheHigh Cardinalityflag is specifically designed to handle characteristics with very large numbers of distinct values, including scenarios where the number of master data records exceeds 2 billion., Reference: SAP BW/4HANA supports high-cardinality characteristics to manage massive datasets efficiently, leveraging SAP HANA's in-memory capabilities., D. You cannot use this characteristic as an external characteristic in hierarchies., While high-cardinality characteristics are not typically used in hierarchies due to their size and complexity, there is no explicit restriction preventing them from being used as external characteristics in hierarchies., Reference: SAP BW/4HANA allows high-cardinality characteristics to be included in hierarchies, but their usage should be carefully evaluated to avoid performance issues., , Conclusion:The correct answers areA. You cannot use this characteristic as a navigation attribute for another characteristicandB. You cannot use navigation attributes for this characteristic, as these restrictions are imposed to optimize performance and memory usage for high-cardinality characteristics in SAP BW/4HANA., ]
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