How To Fix SD_CDS_PROJECTION003 - Function CAST is only allowed with the addition PRESERVING TYPE

SAP Error Message - Details

• Message type: E = Error

• Message class: SD_CDS_PROJECTION - Message for Projection Entities

• Message number: 003

• Message text: Function CAST is only allowed with the addition PRESERVING TYPE

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SD_CDS_PROJECTION003 - Function CAST is only allowed with the addition PRESERVING TYPE ?

  The SAP error message SD_CDS_PROJECTION003 indicates that there is an issue with the use of the CAST function in a Core Data Services (CDS) view. Specifically, the error states that the CAST function is being used without the required addition PRESERVING TYPE. This is a common issue when defining CDS views in SAP, particularly when dealing with type conversions.
  Cause
  The error occurs because the CAST function is being used to convert one data type to another, but the syntax does not include the PRESERVING TYPE clause. In SAP CDS, when you want to cast a value to a different type while ensuring that the original type information is preserved, you must explicitly specify PRESERVING TYPE.
  Solution
  To resolve this error, you need to modify the CDS view definition where the CAST function is used. You should add the PRESERVING TYPE addition to the CAST function. Here’s an example of how to do this:
  Incorrect Usage
  CAST( field AS new_type )
  Correct Usage
  CAST( field AS new_type PRESERVING TYPE )
  Related Information
  
  
  Documentation: Refer to the official SAP documentation on Core Data Services (CDS) for more details on the CAST function and its usage. This will provide insights into the syntax and options available.
  
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context on using CAST in CDS views.
  
  
  Testing: After making the changes, test the CDS view to ensure that it compiles without errors and returns the expected results.
  
  
  Version Compatibility: Ensure that your SAP system version supports the PRESERVING TYPE addition, as this feature may not be available in older versions.
  
  
  Performance Considerations: Be aware that using CAST can have performance implications, especially if used extensively in large datasets. Always evaluate the performance of your CDS views after making changes.
  
  
  By following these steps, you should be able to resolve the SD_CDS_PROJECTION003 error and successfully use the CAST function in your CDS views.