How To Fix DDUT1306 - Table maximum key width (DB &): &

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 306

• Message text: Table maximum key width (DB &): &

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DDUT1306 - Table maximum key width (DB &): & ?

  The SAP error message DDUT1306 indicates that the maximum key width for a database table has been exceeded. This typically occurs when the combined length of the key fields in a table exceeds the limit set by the database system. The error message format is as follows:
  DDUT1306 Table maximum key width (DB &): &
  Cause:
  
  Key Field Length: The total length of the key fields (primary key or unique key) defined in the table exceeds the maximum allowed length for keys in the underlying database.
  Database Limitations: Different databases have different limitations on the maximum key size. For example, in some databases, the maximum key length can be 900 bytes or less.
  Data Type Usage: Using data types with larger byte sizes (like VARCHAR, CHAR, etc.) can quickly lead to exceeding the maximum key width.
  
  Solution:
  
  Review Key Fields: Check the definition of the key fields in the table. You may need to reduce the number of fields in the key or change the data types to smaller ones.
  Modify Table Structure: If possible, consider redesigning the table structure to use fewer fields in the key or to use shorter data types.
  Database-Specific Adjustments: If you are using a specific database (like Oracle, SQL Server, etc.), refer to the documentation for that database to understand its limitations and adjust accordingly.
  Consult SAP Notes: Check for any relevant SAP Notes that might provide guidance or solutions for this specific error.
  
  Related Information:
  
  Database Documentation: Review the documentation for the specific database you are using to understand its limitations regarding key sizes.
  SAP Data Dictionary: Use transaction SE11 to view and modify the table structure and key fields.
  Performance Considerations: Keep in mind that having a large number of key fields can also impact performance, so it's advisable to keep keys as concise as possible.
  
  If you continue to face issues after trying the above solutions, consider reaching out to your SAP Basis team or SAP support for further assistance.