How To Fix SDDL_PARSER_MSG126 - Union: Association & is different in the selections

SDDL_PARSER_MSG126 - Overview

• Message type: E = Error

• Message class: SDDL_PARSER_MSG - Message Class for DDL Parser

• Message number: 126

• Message text: Union: Association & is different in the selections

What causes this issue?

If associations are to be exposed in a CDS view with UNION or UNION ALL,
the respective associations must have identical characteristics in all
selection lists.
This means that the following characteristics of assocations must be
identical:
Names or alias names
Specifications relating to cardinality
Association Targets
ON conditions
Position in the Selection List
In this assoziation &V1&, a difference was found in the item &V2&.

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

System Response

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

SDDL_PARSER_MSG126 - Details

• The SAP error message SDDL_PARSER_MSG126 typically occurs in the context of SAP's Business Suite, particularly when dealing with data selection in queries or reports. This error indicates that there is a mismatch in the associations defined in the selection criteria of a query or report.
  
  Cause:
  The error message SDDL_PARSER_MSG126 arises when:
  
  There are multiple associations defined in the selection criteria, and they are not consistent with each other.
  The fields or entities being selected are not properly aligned with the associations defined in the data model.
  The query is trying to access data from different entities that are not correctly linked through the defined associations.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the Selection Criteria:
  
  Check the selection criteria in your query or report. Ensure that the associations used are consistent and correctly defined.
  Make sure that the fields you are selecting are compatible with the associations.
  
  
  
  Check Data Model:
  
  Review the underlying data model to