How To Fix MC028 - Join using a constant in the foreign key

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 028

• Message text: Join using a constant in the foreign key

What causes this issue?

Two tables are linked to form a view using a foreign key relationship
containing a constant. This relationship has the same effect as if the
corresponding field of the check table is equated to the
constants in a selection condition. .

System Response

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

How to fix this error?

Check whether you want this kind of an operation.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC028 - Join using a constant in the foreign key ?

  The SAP error message MC028, which states "Join using a constant in the foreign key," typically occurs in the context of SAP BW (Business Warehouse) or when working with queries in SAP systems. This error indicates that there is an issue with how the join conditions are defined in a query or data model, specifically that a constant value is being used in a foreign key relationship.
  
  Cause:
  The error arises when a join condition in a query or data model is incorrectly defined to use a constant value instead of a variable or field reference. This can happen in various scenarios, such as:
  
  Incorrect Query Design: When designing a query, if a constant value is used in the join condition instead of a field from the data source.
  Data Model Issues: In the data model, if a foreign key relationship is defined using a constant rather than a dynamic reference to another table