How To Fix DD_MT_SHARING030 - Mixed sharing not possible for DB tables with unique secondary indexes

SAP Error Message - Details

• Message type: E = Error

• Message class: DD_MT_SHARING - DDIC Multi Tenancy Sharing: Messages

• Message number: 030

• Message text: Mixed sharing not possible for DB tables with unique secondary indexes

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DD_MT_SHARING030 - Mixed sharing not possible for DB tables with unique secondary indexes ?

  The SAP error message DD_MT_SHARING030 indicates that mixed sharing is not possible for database tables that have unique secondary indexes. This error typically arises in the context of database table definitions and their sharing settings in SAP.
  Cause:
  The error occurs when you attempt to configure a database table for mixed sharing (i.e., a combination of shared and non-shared access) while the table has unique secondary indexes defined. In SAP, unique secondary indexes enforce a constraint that ensures that the values in the indexed fields are unique across the table. This uniqueness requirement conflicts with the mixed sharing model, which is designed to allow multiple users to access the same data concurrently without conflicts.
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Change the Index Type:
  
  If possible, modify the secondary index to be non-unique. This may not always be feasible depending on your business requirements, as it could lead to data integrity issues.
  
  
  
  Use Full Sharing:
  
  Instead of mixed sharing, configure the table for full sharing. This means that all accesses to the table will be treated as shared, which is compatible with unique secondary indexes.
  
  
  
  Review Table Design:
  
  Reassess the design of the database table and its indexes. Ensure that the use of unique secondary indexes is necessary and that the table's access patterns align with the intended sharing model.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or consult with your SAP Basis or ABAP team for best practices regarding table design and index usage.
  
  
  
  Check for Updates:
  
  Ensure that your SAP system is up to date, as there may be patches or updates that address related issues or provide enhanced functionality.
  
  
  
  Related Information:
  
  Database Table Design: Understanding how to design database tables and indexes in SAP is crucial. Familiarize yourself with concepts like primary keys, secondary indexes, and their implications on data access.
  SAP Notes: Check SAP Notes for any specific guidance or known issues related to this error message. SAP Notes often provide solutions or workarounds for common problems.
  Performance Considerations: Be aware that changing index types or sharing configurations can impact performance. Always test changes in a development or quality assurance environment before applying them to production.
  
  If you continue to face issues or if the solutions above do not resolve the error, consider reaching out to SAP support for further assistance.