Ques:
A global organization requires a model that allows reporting in different time zones, adjusting transactional timestamps accordingly. How would you structure the model to handle this?
Ans:
When the transactional timestamps need to be adjusted to different time zones, the data model structure can be created considering a few of the key pointers such as :
– The data model should account for various time zone conversions while ensuring accurate reporting across multiple regions.
– The raw transactional timestamps should be stored in UTC format while dealing with multiple time zones, in our fact tables or transactional tables.
– Store the timezone offset along with the UTC timestamp.
– Convert the UTC timestamps into appropriate local time zones for users’ regions on the basis of various business logic.
– Store timestamp in UTC format in the fact table, add a field for time zone and time zone offset, in fact, able to capture specific time zones during the transaction.
– During data extraction, if the source system does not provide the time zone relevant information, then we can use the reference table or logic to refer to it based on any key.
– Using SAP BW HANA capabilities, we can convert the UTC timestamp into the local time zone during query execution.
- Create a time zone reference table to map the time zone offset to a specific time zone, location, and region.
- Data Transformation: If working with Data Transfer Processes (DTPs) or Process Chains, ensure that the time zone conversion logic is included as part of the transformation steps, ensuring time zone adjustments are made during the load process.
- When users request reports, you can include logic in the query or within the BW query designer to adjust the time zone for reporting.
- Design your model with flexibility in mind, ensuring that the local time conversion is done on-demand in reports based on users’ time zones or business requirements.
By following this approach, you can ensure accurate time zone handling in SAP BW on HANA, allowing users to generate reports in the correct time zone while maintaining the consistency and integrity of the underlying transactional data.
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