How To Fix SMMSS_DDIC033 - MSSQL: Indexes/primary keys must not contain LOB columns

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 033

• Message text: MSSQL: Indexes/primary keys must not contain LOB columns

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SMMSS_DDIC033 - MSSQL: Indexes/primary keys must not contain LOB columns ?

  The SAP error message SMMSS_DDIC033 indicates that there is an issue with the database schema, specifically related to the use of LOB (Large Object) columns in indexes or primary keys in a Microsoft SQL Server (MSSQL) database. LOB columns typically include data types such as TEXT, NTEXT, IMAGE, VARCHAR(MAX), NVARCHAR(MAX), and VARBINARY(MAX).
  Cause:
  The error occurs because SQL Server does not allow LOB columns to be part of an index or primary key. This restriction is in place because LOB data types can store large amounts of data, which can lead to performance issues and inefficiencies when used in indexing.
  Solution:
  To resolve this error, you need to ensure that LOB columns are not included in any indexes or primary keys. Here are the steps you can take:
  
  
  Identify the LOB Columns: Determine which columns in your database schema are defined as LOB types.
  
  
  Review Indexes and Primary Keys: Check the indexes and primary keys defined on the tables that contain LOB columns. You can do this by querying the system catalog views in SQL Server, such as sys.indexes and sys.index_columns.
  
  
  Modify the Schema:
  
  Remove LOB Columns from Indexes/Primary Keys: If you find that any indexes or primary keys include LOB columns, you will need to modify them to exclude these columns.
  Create New Indexes: If necessary, create new indexes that include only non-LOB columns to maintain performance.
  
  
  
  Test Changes: After making the changes, test the database operations to ensure that the error is resolved and that performance is acceptable.
  
  
  Update SAP Data Dictionary: If you are working with SAP's data dictionary, ensure that the changes are reflected in the data dictionary to avoid future issues.
  
  
  Related Information:
  
  Database Design Best Practices: When designing your database schema, avoid using LOB columns in indexes or primary keys. Instead, consider using smaller data types or creating separate tables for large objects.
  SAP Notes: Check SAP Notes for any specific guidance or patches related to this error. SAP frequently updates its documentation and may provide additional insights or solutions.
  SQL Server Documentation: Refer to the official Microsoft SQL Server documentation for more information on LOB data types and indexing limitations.
  
  By following these steps, you should be able to resolve the SMMSS_DDIC033 error and ensure that your database schema complies with SQL Server's indexing rules.