How To Fix SDDL_PARSER_MSG305 - LEFT OUTER JOIN is not supported with WITH HIERARCHY clause

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 305

• Message text: LEFT OUTER JOIN is not supported with WITH HIERARCHY clause

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG305 - LEFT OUTER JOIN is not supported with WITH HIERARCHY clause ?

  The SAP error message SDDL_PARSER_MSG305 indicates that there is an issue with the use of a LEFT OUTER JOIN in conjunction with the WITH HIERARCHY clause in a query. This error typically arises when you are trying to perform a join operation on a hierarchy structure in a way that is not supported by the SAP system.
  Cause:
  The primary cause of this error is that the SAP system does not support the combination of a LEFT OUTER JOIN with the WITH HIERARCHY clause. The WITH HIERARCHY clause is used to define a hierarchy structure in the query, and using it with a LEFT OUTER JOIN can lead to ambiguous results or conflicts in how the hierarchy is processed.
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Remove the LEFT OUTER JOIN: If possible, restructure your query to avoid using a LEFT OUTER JOIN. Instead, you might use an INNER JOIN or a different approach that does not conflict with the hierarchy.
  
  
  Use Subqueries: If you need to retain the LEFT OUTER JOIN for your logic, consider breaking your query into subqueries. You can first retrieve the necessary data from the hierarchy and then join it with other tables in a separate query.
  
  
  Check Hierarchy Requirements: Review the requirements of your query to see if you can achieve the desired results without using the WITH HIERARCHY clause. Sometimes, you can achieve similar results by restructuring the data or using different query techniques.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific version you are using to understand the limitations and best practices for using joins with hierarchical data.
  
  
  Seek Help from SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support or consulting with a colleague who has experience with SAP queries and hierarchies.
  
  
  Related Information:
  
  SAP Query Language: Understanding the syntax and limitations of the SAP query language can help you avoid similar issues in the future.
  Hierarchical Data Handling: Familiarize yourself with how SAP handles hierarchical data and the specific functions or clauses that are available for working with such data.
  Performance Considerations: Be aware that complex joins and hierarchical queries can impact performance, so always consider optimizing your queries for efficiency.
  
  By following these steps, you should be able to address the error and successfully execute your query without encountering the SDDL_PARSER_MSG305 message.