How To Fix APS_CKE_PARSER066 - Default aggregation must be none or empty for key fields.

SAP Error Message - Details

• Message type: E = Error

• Message class: APS_CKE_PARSER - CDS Key user tool - AST handler messages

• Message number: 066

• Message text: Default aggregation must be none or empty for key fields.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message APS_CKE_PARSER066 - Default aggregation must be none or empty for key fields. ?

  The SAP error message APS_CKE_PARSER066, which states "Default aggregation must be none or empty for key fields," typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when dealing with data modeling, particularly in the context of InfoObjects or CompositeProviders.
  Cause:
  This error arises when you are trying to set a default aggregation for a key field in your data model. In SAP BW, key fields are unique identifiers for records, and they should not have any aggregation applied to them. The system expects that key fields either have no default aggregation set or are left empty. If you attempt to set an aggregation type (like SUM, AVG, etc.) on a key field, the system will throw this error.
  Solution:
  To resolve this error, you should check the following:
  
  
  Identify Key Fields: Determine which fields in your model are defined as key fields. These are typically fields that uniquely identify a record.
  
  
  Check Aggregation Settings: Go to the data model where the error is occurring (e.g., InfoObject, CompositeProvider, etc.) and check the aggregation settings for the key fields.
  
  
  Remove Aggregation: If you find that a key field has a default aggregation set (like SUM, COUNT, etc.), change the aggregation setting to "None" or leave it empty. This can usually be done in the properties of the InfoObject or in the modeling tool you are using.
  
  
  Validate the Model: After making the changes, validate the model to ensure that there are no other issues.
  
  
  Re-activate the Model: If necessary, re-activate the data model to apply the changes.
  
  
  Related Information:
  
  Key Fields: In SAP BW, key fields are essential for uniquely identifying records in a data model. They should not be aggregated because aggregation is meant for measures or non-key fields.
  Aggregation Types: Common aggregation types include SUM, COUNT, AVERAGE, etc. These should only be applied to non-key fields.
  SAP Documentation: For more detailed information, refer to the official SAP documentation or help portal related to data modeling in SAP BW or SAP HANA.
  
  By following these steps, you should be able to resolve the APS_CKE_PARSER066 error and ensure that your data model is correctly configured.