How To Fix ESH_CDS_VAL018 - Field &1 of view &2 derived from &3 which involves an GROUPBY CLAUSE

SAP Error Message - Details

• Message type: E = Error

• Message class: ESH_CDS_VAL -

• Message number: 018

• Message text: Field &1 of view &2 derived from &3 which involves an GROUPBY CLAUSE

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message ESH_CDS_VAL018 - Field &1 of view &2 derived from &3 which involves an GROUPBY CLAUSE ?

  The SAP error message ESH_CDS_VAL018 typically indicates an issue related to the use of a GROUP BY clause in a Core Data Services (CDS) view. This error can occur when there is a mismatch or inconsistency in the fields being selected and those being aggregated or grouped.
  Cause:
  The error arises when:
  
  Inconsistent Selection: The fields in the SELECT statement do not align with the fields specified in the GROUP BY clause. In a GROUP BY query, all selected fields must either be included in the GROUP BY clause or be aggregated (e.g., using functions like SUM, COUNT, AVG, etc.).
  Derived Fields: The field mentioned in the error message is derived from another view or table, and there may be issues with how it is being aggregated or grouped.
  Data Model Issues: There may be issues in the underlying data model or the way the CDS view is defined, leading to conflicts in the aggregation logic.
  
  Solution:
  To resolve the ESH_CDS_VAL018 error, consider the following steps:
  
  
  Check the SELECT Statement: Review the SELECT statement in the CDS view. Ensure that all non-aggregated fields are included in the GROUP BY clause.
  
  Example: If you have SELECT field1, field2, SUM(field3) FROM ... GROUP BY field1, then field2 should also be included in the GROUP BY clause if it is not aggregated.
  
  
  
  Review Aggregation Logic: If you are using aggregate functions, ensure that all fields that are not part of an aggregate function are included in the GROUP BY clause.
  
  
  Examine Derived Fields: If the field causing the error is derived from another view, check the definition of that view to ensure it is correctly defined and that the fields are appropriately aggregated.
  
  
  Test the Query: If possible, run the underlying SQL query directly in the database to see if it produces the expected results without errors. This can help identify issues with the query structure.
  
  
  Consult Documentation: Refer to SAP documentation or community forums for specific guidance on the CDS view and GROUP BY usage.
  
  
  Debugging: If the issue persists, consider debugging the CDS view to trace the source of the error. This may involve checking the annotations and definitions used in the view.
  
  
  Related Information:
  
  CDS Views: Core Data Services (CDS) are a way to define semantic data models in SAP. They allow for complex queries and data manipulation.
  GROUP BY Clause: This SQL clause is used to group rows that have the same values in specified columns into summary rows, like "total sales by region."
  SAP Notes and Community: Check SAP Notes for any known issues or patches related to this error. The SAP Community can also be a valuable resource for troubleshooting.
  
  By following these steps, you should be able to identify and resolve the issue causing the ESH_CDS_VAL018 error in your SAP environment.