How To Fix CDS_UNIT_MESSAGE016 - Double for special functions is not supported in CDS hierarchy testing

SAP Error Message - Details

• Message type: E = Error

• Message class: CDS_UNIT_MESSAGE - Message Class

• Message number: 016

• Message text: Double for special functions is not supported in CDS hierarchy testing

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CDS_UNIT_MESSAGE016 - Double for special functions is not supported in CDS hierarchy testing ?

  The error message CDS_UNIT_MESSAGE016 in SAP indicates that there is an issue with the use of double data types in the context of special functions within a Core Data Services (CDS) hierarchy testing scenario. This error typically arises when you are trying to use a double data type in a context where it is not supported, particularly in hierarchical queries or calculations.
  Cause:
  
  Data Type Incompatibility: The error is primarily caused by the use of double data types in calculations or functions that are not designed to handle them. CDS views and certain functions may have restrictions on the data types they can process, especially in hierarchical contexts.
  Special Functions: The error may also occur when using special functions (like aggregations or calculations) that do not support double data types. This can happen if the CDS view is trying to perform operations that require integer or decimal types instead.
  
  Solution:
  
  Change Data Types: Review the data types used in your CDS view. If you are using double types, consider changing them to a compatible type, such as DECIMAL or FLOAT, depending on the precision you need.
  Modify the CDS View: If the CDS view is using special functions that are incompatible with double types, you may need to refactor the view to avoid using those functions or to ensure that the data types being passed to them are compatible.
  Check Hierarchy Definitions: If you are working with hierarchical data, ensure that the definitions and calculations used in the hierarchy are compatible with the data types being utilized.
  Testing and Validation: After making changes, test the CDS view to ensure that the error is resolved and that the view behaves as expected.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for Core Data Services to understand the limitations and supported data types for various functions.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and to find potential workarounds or solutions.
  Debugging Tools: Use debugging tools available in the ABAP Development Environment to trace the execution of your CDS view and identify where the error is being triggered.
  
  By addressing the data type compatibility and ensuring that the functions used in your CDS view are appropriate for the data types involved, you should be able to resolve the CDS_UNIT_MESSAGE016 error.