How To Fix SDDL_PARSER_MSG326 - CASE JOIN 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: 326

• Message text: CASE JOIN 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_MSG326 - CASE JOIN not supported with WITH HIERARCHY clause ?

  The SAP error message SDDL_PARSER_MSG326 indicates that there is an issue with the use of the CASE JOIN in conjunction with the WITH HIERARCHY clause in your SAP system. This error typically arises when you are trying to create a query or a data model that involves both a CASE JOIN and a hierarchical structure, which is not supported by the system.
  Cause:
  The primary cause of this error is the incompatibility between the CASE JOIN and the WITH HIERARCHY clause. In SAP BW (Business Warehouse) or SAP HANA, a CASE JOIN is used to join tables based on certain conditions, while the WITH HIERARCHY clause is used to define a hierarchy for a dimension. The system does not allow these two features to be used together because the hierarchical structure requires a specific way of handling data that conflicts with the conditional logic of a CASE JOIN.
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Remove the WITH HIERARCHY Clause: If the hierarchical structure is not essential for your query or data model, you can remove the WITH HIERARCHY clause and use a standard join instead.
  
  
  Avoid Using CASE JOIN: If the WITH HIERARCHY clause is necessary, you may need to redesign your query or data model to avoid using a CASE JOIN. Instead, consider using standard joins or other methods to achieve the desired results.
  
  
  Reevaluate the Data Model: Analyze the data model to see if there are alternative ways to structure your data that do not require both features. This might involve creating separate queries or views that can be combined later.
  
  
  Consult Documentation: Check the SAP documentation or help resources for any updates or best practices regarding the use of joins and hierarchies. There may be specific guidelines or alternative methods recommended by SAP.
  
  
  Seek Support: If you are unable to resolve the issue, consider reaching out to SAP support or your internal SAP team for assistance. They may have encountered similar issues and can provide guidance based on your specific scenario.
  
  
  Related Information:
  
  SAP BW/4HANA Documentation: Review the official SAP documentation for BW/4HANA or SAP HANA to understand the limitations and best practices regarding joins and hierarchies.
  SAP Community: Engage with the SAP Community forums where other users may have faced similar issues and can share their solutions or workarounds.
  Training and Tutorials: Consider training resources or tutorials that cover advanced query design in SAP BW or HANA, which may provide insights into handling complex data models.
  
  By following these steps, you should be able to address the error and successfully create your query or data model without encountering the SDDL_PARSER_MSG326 error.