How To Fix SDDL_PARSER_MSG249 - Invalid comparison in the ON condition of the composition definition

SAP Error Message - Details

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 249

• Message text: Invalid comparison in the ON condition of the composition definition

What causes this issue?

The comparison in the composition ON condition is invalid. A key field
of the projection list must be compared with a field of the composition
target.

How to fix this error?

In a composition ON condition, a key field must be compared with a field
of the composition target.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message SDDL_PARSER_MSG249 - Invalid comparison in the ON condition of the composition definition ?

  The SAP error message SDDL_PARSER_MSG249 indicates that there is an invalid comparison in the ON condition of a composition definition. This typically occurs in the context of SAP's Service Data Language (SDL) or when defining relationships between entities in a data model.
  Cause:
  The error is usually caused by one of the following issues:
  
  
  Mismatched Data Types: The fields being compared in the ON condition may have incompatible data types. For example, comparing a string field with a numeric field.
  
  
  Incorrect Field References: The fields referenced in the ON condition may not exist or may be incorrectly specified.
  
  
  Logical Errors: There may be logical errors in the comparison, such as trying to compare fields that do not have a meaningful relationship.
  
  
  Syntax Errors: There could be syntax issues in the ON condition, such as missing operators or incorrect formatting.
  
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Data Types: Ensure that the fields being compared in the ON condition have compatible data types. If necessary, convert one of the fields to match the other's type.
  
  
  Verify Field Names: Double-check the field names used in the ON condition to ensure they are correct and exist in the respective entities.
  
  
  Review Logic: Analyze the logic of the comparison to ensure it makes sense in the context of the data model. Ensure that the relationship you are trying to establish is valid.
  
  
  Correct Syntax: Review the syntax of the ON condition for any errors. Ensure that all operators are correctly placed and that the condition is properly formatted.
  
  
  Test with Simplified Conditions: If the ON condition is complex, try simplifying it to isolate the issue. Start with a basic comparison and gradually add complexity back in.
  
  
  Related Information:
  
  Documentation: Refer to the SAP documentation for Service Data Language (SDL) or the specific module you are working with for more details on defining composition definitions and ON conditions.
  SAP Community: Check the SAP Community forums for similar issues and solutions shared by other users.
  Debugging Tools: Use SAP's debugging tools to trace the execution and identify where the error occurs in the data model.
  
  By following these steps, you should be able to identify and resolve the cause of the SDDL_PARSER_MSG249 error.