How To Fix SDDL_PARSER_MSG290 - WITH HIERARCHY cannot be combined with GROUP BY

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 290

• Message text: WITH HIERARCHY cannot be combined with GROUP BY

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG290 - WITH HIERARCHY cannot be combined with GROUP BY ?

  The SAP error message SDDL_PARSER_MSG290 typically indicates that there is an issue with the way a query is structured, particularly when using the HIERARCHY function in conjunction with a GROUP BY clause. This error arises when the query attempts to combine hierarchical data with aggregation functions in a way that is not supported.
  Cause:
  The error occurs because:
  
  HIERARCHY Functionality: The HIERARCHY function is designed to work with hierarchical data structures, and it may not be compatible with certain SQL operations, such as aggregation (e.g., using GROUP BY).
  SQL Syntax: The SQL syntax may be incorrect or not aligned with the expected structure for queries involving hierarchical data.
  Data Model Limitations: The underlying data model may have limitations that prevent the combination of hierarchical data with aggregation.
  
  Solution:
  To resolve this error, consider the following approaches:
  
  
  Remove GROUP BY: If possible, remove the GROUP BY clause from your query if it is not necessary for your analysis.
  
  
  Use Subqueries: Instead of using GROUP BY directly with the HIERARCHY function, consider using a subquery to first retrieve the hierarchical data and then perform the aggregation on the results of that subquery.
  Example:
  SELECT 
      column1, 
      SUM(column2) 
  FROM 
      (SELECT * FROM your_table WHERE your_conditions) AS subquery
  GROUP BY 
      column1;
  
  
  Check Hierarchical Data Structure: Ensure that the hierarchical data is structured correctly and that you are using the appropriate functions to handle it.
  
  
  Review Documentation: Consult the SAP documentation for the specific version you are using to understand the limitations and best practices for working with hierarchical data and aggregation.
  
  
  Alternative Functions: If your goal is to aggregate data while still considering hierarchy, explore alternative functions or methods that are designed to work with hierarchical data without causing conflicts.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and what solutions they have found.
  Documentation: Review the official SAP documentation for the specific module you are working with, as it may provide insights into the correct usage of HIERARCHY and GROUP BY.
  
  By following these steps, you should be able to address the SDDL_PARSER_MSG290 error and successfully execute your query.