How To Fix DDLS207 - CASE (&): Aggregate function & does not supply a valid data type

SAP Error Message - Details

• Message type: E = Error

• Message class: DDLS - For DDL source handling

• Message number: 207

• Message text: CASE (&): Aggregate function & does not supply a valid data type

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDLS207 - CASE (&): Aggregate function & does not supply a valid data type ?

  The SAP error message DDLS207 indicates that there is an issue with an aggregate function in a Data Definition Language (DDL) statement. Specifically, the error message states that the aggregate function does not supply a valid data type. This typically occurs when the data type returned by the aggregate function is not compatible with the expected data type in the context where it is being used.
  Cause:
  
  Invalid Data Type: The aggregate function (like SUM, AVG, COUNT, etc.) is returning a data type that is not valid for the context in which it is being used. For example, trying to use an aggregate function on a non-numeric field when expecting a numeric result.
  Mismatched Data Types: The data type of the column being aggregated may not match the expected data type for the operation.
  Database Compatibility: The SQL syntax or functions used may not be compatible with the database version or type you are working with.
  
  Solution:
  
  Check the Aggregate Function: Review the aggregate function being used and ensure that it is appropriate for the data type of the column being aggregated. For example, ensure that you are using numeric functions on numeric fields.
  Data Type Compatibility: Verify that the data types of the columns involved in the aggregate function are compatible with the expected output. You may need to cast or convert data types explicitly.
  Review SQL Syntax: Ensure that the SQL syntax is correct and adheres to the standards of the database you are using. Check for any typos or incorrect function usage.
  Test in Isolation: If possible, isolate the aggregate function in a simple query to see if it executes correctly. This can help identify if the issue is with the function itself or its context in the larger query.
  Consult Documentation: Refer to the SAP documentation or the documentation for the specific database you are using to understand the expected data types for the aggregate functions.
  
  Related Information:
  
  Aggregate Functions: Common aggregate functions include SUM(), AVG(), COUNT(), MIN(), and MAX(). Each of these functions has specific data type requirements.
  Data Types in SAP: Familiarize yourself with the data types used in SAP and how they map to SQL data types. This can help in understanding compatibility issues.
  Debugging SQL Queries: Use tools or transaction codes in SAP (like SE11 for Data Dictionary) to analyze the structure of the tables and fields involved in your query.
  
  By following these steps, you should be able to identify and resolve the issue causing the DDLS207 error in your SAP environment.