How To Fix SDDL_PARSER_MSG229 - $$projection is not supported in hierarchies

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 229

• Message text: $$projection is not supported in hierarchies

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG229 - $$projection is not supported in hierarchies ?

  The SAP error message SDDL_PARSER_MSG229 with the description $$projection is not supported in hierarchies typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when working with hierarchies in queries or data models. This error indicates that the use of a projection (a specific type of data transformation or filtering) is not compatible with the hierarchical structure of the data being processed.
  Cause:
  
  Hierarchical Data Structure: The error arises when a projection operation is attempted on a data structure that is defined as a hierarchy. Hierarchies in SAP are used to represent parent-child relationships, and certain operations, like projections, may not be valid in this context.
  Query Design: If you are designing a query that involves hierarchies and you inadvertently include a projection operation, the system will throw this error.
  Incompatible Data Model: The data model or the InfoObject being used may not support projections when it is defined as a hierarchy.
  
  Solution:
  
  Review Query Design: Check the query design in the Query Designer. Ensure that you are not using projection operations on fields that are part of a hierarchy.
  Modify Hierarchy Usage: If you need to perform projections, consider restructuring your query to avoid using hierarchical fields or to flatten the hierarchy if possible.
  Use Alternative Functions: Instead of using projections, explore other functions or calculations that can achieve the desired result without violating the hierarchy constraints.
  Check Data Model: Review the data model and ensure that the InfoObjects and their properties are correctly defined. If necessary, adjust the properties of the InfoObjects to allow for the required operations.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on working with hierarchies and projections in your version of SAP BW or HANA.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context or fixes.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  Training and Documentation: Consider reviewing training materials or documentation related to SAP BW or HANA, particularly sections that cover hierarchies and query design.
  
  By following these steps, you should be able to resolve the error and successfully work with your hierarchical data in SAP.