How To Fix CFD_REGISTRY_CHECK200 - Missing group by clause in union branch of subview &1.

SAP Error Message - Details

• Message type: E = Error

• Message class: CFD_REGISTRY_CHECK - Custom Fields: Messages for Registry Check

• Message number: 200

• Message text: Missing group by clause in union branch of subview &1.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CFD_REGISTRY_CHECK200 - Missing group by clause in union branch of subview &1. ?

  The SAP error message "CFD_REGISTRY_CHECK200 Missing group by clause in union branch of subview &1" typically occurs in the context of SAP's Core Data Services (CDS) views, particularly when dealing with unions in subviews. This error indicates that there is a missing GROUP BY clause in one of the branches of a union operation within a CDS view.
  Cause:
  The error arises when:
  
  You have a union operation in your CDS view that combines results from multiple subviews or tables.
  One or more of the branches in the union does not have a corresponding GROUP BY clause when it is required. This is often the case when aggregate functions (like SUM, COUNT, etc.) are used in the select list without a proper grouping.
  
  Solution:
  To resolve this error, you should:
  
  
  Check the Union Branches: Review each branch of the union in your CDS view. Ensure that if you are using aggregate functions, you have a corresponding GROUP BY clause that includes all non-aggregated fields in the select list.
  
  
  Add GROUP BY Clause: If you find a branch that is missing a GROUP BY clause, add it. For example:
  SELECT field1, SUM(field2) AS total
  FROM table1
  GROUP BY field1
  UNION
  SELECT field1, SUM(field2) AS total
  FROM table2
  GROUP BY field1
  
  
  Consistency Across Branches: Ensure that all branches of the union have the same structure (i.e., the same number of columns and compatible data types).
  
  
  Testing: After making changes, activate the CDS view and test it to ensure that the error is resolved.
  
  
  Related Information:
  
  CDS Views: Core Data Services (CDS) are a way to define semantically rich data models in SAP. They allow for the definition of views that can include complex logic, including unions and aggregations.
  SQL Syntax: Familiarize yourself with SQL syntax, especially regarding GROUP BY and aggregate functions, as this will help in troubleshooting similar issues in the future.
  SAP Documentation: Refer to the official SAP documentation for Core Data Services for more detailed information on how to structure your views and handle unions.
  
  If you continue to experience issues after making these adjustments, consider checking for any additional constraints or requirements specific to your SAP environment or version.