How To Fix SMMSS_DDIC031 - MSSQL: Indexes/primary keys must contain a maximum of & columns

SAP Error Message - Details

• Message type: E = Error

• Message class: SMMSS_DDIC - DDIC Messages for Microsoft SQL Server

• Message number: 031

• Message text: MSSQL: Indexes/primary keys must contain a maximum of & columns

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SMMSS_DDIC031 - MSSQL: Indexes/primary keys must contain a maximum of & columns ?

  The SAP error message SMMSS_DDIC031 indicates that there is an issue with the definition of indexes or primary keys in a Microsoft SQL Server (MSSQL) database. Specifically, the error states that the number of columns in an index or primary key exceeds the maximum allowed limit.
  Cause:
  In SQL Server, the maximum number of columns that can be included in a single index or primary key is limited to 32 columns. If an attempt is made to create an index or primary key with more than 32 columns, this error will be triggered.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Review the Index/Primary Key Definition:
  
  Check the definition of the index or primary key that is causing the error. Identify how many columns are included in the index or primary key.
  
  
  
  Reduce the Number of Columns:
  
  If the index or primary key includes more than 32 columns, you will need to reduce the number of columns. This can be done by:
  
  Removing unnecessary columns from the index or primary key.
  Creating multiple indexes or primary keys if needed, each with a maximum of 32 columns.
  
  
  
  
  
  Recreate the Index/Primary Key:
  
  After modifying the column list, recreate the index or primary key with the corrected definition.
  
  
  
  Test the Changes:
  
  After making the changes, test the database operations that were previously failing to ensure that the error has been resolved.
  
  
  
  Related Information:
  
  SQL Server Documentation: Refer to the official Microsoft SQL Server documentation for more details on index and primary key limitations.
  Database Design Best Practices: Consider reviewing best practices for database design to ensure that indexes and primary keys are optimized for performance and do not exceed limits.
  SAP Notes: Check SAP Notes and Knowledge Base Articles for any specific guidance related to this error in the context of SAP applications.
  
  By following these steps, you should be able to resolve the error and ensure that your database schema adheres to the constraints imposed by SQL Server.