How To Fix DDUT1310 - Table maximum number of key columns (DB &): &

SAP Error Message - Details

• Message type: E = Error

• Message class: DDUT1 - DD: Various Dictionary Utility Programs

• Message number: 310

• Message text: Table maximum number of key columns (DB &): &

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDUT1310 - Table maximum number of key columns (DB &): & ?

  The SAP error message DDUT1310 indicates that you have exceeded the maximum number of key columns allowed for a database table. In SAP, the maximum number of key fields (or key columns) that can be defined for a database table is typically limited to 16. If you attempt to define more than this limit, you will encounter this error.
  Cause:
  The error occurs when you try to create or modify a database table in the Data Dictionary (SE11) and specify more than the allowed number of key fields. This can happen during the creation of a new table or when modifying an existing one.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review Key Fields: Check the key fields you have defined for the table. Determine if all of them are necessary as key fields. 
  
  
  Reduce Key Fields: If possible, reduce the number of key fields to 16 or fewer. You may need to analyze the business requirements to see if some fields can be removed from the key.
  
  
  Composite Keys: If you have multiple fields that are often used together, consider using a composite key (a single key field that combines multiple values) if it fits your use case.
  
  
  Normalization: Consider normalizing your database design. Sometimes, splitting a table into multiple related tables can help reduce the number of key fields in a single table.
  
  
  Consult Documentation: Refer to SAP documentation or guidelines for best practices in table design and key field usage.
  
  
  Testing: After making changes, test the table to ensure that it meets the functional requirements and that the performance is acceptable.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any specific guidance or updates related to this error message.
  Data Dictionary (SE11): Familiarize yourself with the Data Dictionary in SAP, as it provides tools for managing database tables and their structures.
  Database Design Principles: Understanding database normalization and design principles can help prevent similar issues in the future.
  
  If you continue to face issues or if the table design is complex, consider consulting with an SAP Basis or ABAP expert for further assistance.