How To Fix MDC_HDB_MTC077 - Key attribute &1 will be added from entity &2

SAP Error Message - Details

• Message type: E = Error

• Message class: MDC_HDB_MTC - Message class for master data consolidation matching

• Message number: 077

• Message text: Key attribute &1 will be added from entity &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MDC_HDB_MTC077 - Key attribute &1 will be added from entity &2 ?

  The SAP error message MDC_HDB_MTC077 indicates that a key attribute is being added from a specific entity in the context of SAP HANA database modeling, particularly when working with Multi-tenant Database Containers (MDC) or when dealing with data modeling in SAP HANA.
  Cause:
  This error typically arises when there is an inconsistency or conflict in the data model, particularly when defining key attributes for entities (like tables or views). The system is trying to add a key attribute from one entity to another, which may not be allowed due to the current configuration or relationships defined in the data model.
  Solution:
  To resolve this error, consider the following steps:
  
  
  Review the Data Model: Check the entities involved in the error message. Ensure that the key attributes are correctly defined and that there are no conflicts in the relationships between the entities.
  
  
  Check Key Attributes: Verify that the key attributes you are trying to add are appropriate for the entity. Ensure that they are unique and correctly defined as primary keys in the source entity.
  
  
  Adjust Relationships: If the entities are related, ensure that the relationships (like foreign keys) are correctly set up. You may need to adjust the relationships to allow for the addition of the key attribute.
  
  
  Consult Documentation: Refer to the SAP HANA documentation for guidelines on defining key attributes and relationships in your data model. This can provide insights into best practices and common pitfalls.
  
  
  Testing: After making adjustments, test the data model to ensure that the error does not reoccur. You may need to refresh or revalidate the model in the SAP HANA Studio or relevant tools.
  
  
  Seek Support: If the issue persists, consider reaching out to SAP support or consulting with a colleague who has experience with SAP HANA data modeling.
  
  
  Related Information:
  
  SAP HANA Studio: This is the primary tool for modeling and managing data in SAP HANA. Familiarity with its features can help in troubleshooting issues like this.
  Data Modeling Best Practices: Understanding best practices for data modeling in SAP HANA can help prevent such errors in the future.
  SAP Community: Engaging with the SAP Community can provide additional insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify the cause of the MDC_HDB_MTC077 error and implement a suitable solution.