How To Fix RSRTS_CDS154 - CAST expression (&1): Data type not supported for measure

SAP Error Message - Details

• Message type: E = Error

• Message class: RSRTS_CDS - Messages Transient CDS Queries

• Message number: 154

• Message text: CAST expression (&1): Data type not supported for measure

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSRTS_CDS154 - CAST expression (&1): Data type not supported for measure ?

  The SAP error message RSRTS_CDS154 indicates that there is an issue with a CAST expression in a Core Data Services (CDS) view or query, specifically related to a measure's data type not being supported. This error typically arises when you are trying to cast a data type that is not compatible with the expected measure type in your query or report.
  Cause:
  
  Incompatible Data Type: The most common cause of this error is that the data type you are trying to cast does not match the expected data type for a measure. For example, you might be trying to cast a string or a non-numeric type to a numeric type.
  Incorrect Measure Definition: If the measure is defined incorrectly in the CDS view or if the underlying data source has incompatible types, this error can occur.
  Aggregation Issues: If you are trying to aggregate a field that is not a measure or is not compatible with aggregation functions, this can lead to this error.
  
  Solution:
  
  Check Data Types: Review the data types of the fields involved in the CAST expression. Ensure that you are casting to a compatible type. For example, if you are trying to cast to a DECIMAL or FLOAT, ensure that the source field can be converted to that type.
  Modify the CDS View: If you have access to the CDS view definition, modify it to ensure that the measures are defined correctly and that the data types are compatible. You may need to change the data type of the field or the way it is being aggregated.
  Use Compatible Functions: Instead of using a CAST expression, consider using functions that are designed to handle type conversions more gracefully, such as COALESCE or IFNULL, which can help avoid type mismatches.
  Check Aggregation Logic: If the measure is part of an aggregation, ensure that the aggregation logic is appropriate for the data type being used.
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for Core Data Services and the specific data types supported for measures.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they have found.
  Debugging Tools: Use transaction codes like RSRT (for reporting) or SE11 (for data dictionary) to analyze the underlying data structures and types.
  
  By following these steps, you should be able to identify the root cause of the RSRTS_CDS154 error and implement a suitable solution.