How To Fix DT754 - Primary key with inverted individual only possible in column store

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 754

• Message text: Primary key with inverted individual only possible in column store

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DT754 - Primary key with inverted individual only possible in column store ?

  The SAP error message DT754, which states "Primary key with inverted individual only possible in column store," typically occurs in the context of SAP HANA database modeling, particularly when working with column store tables. This error indicates that there is an issue with the way the primary key is defined for a table that is intended to be stored in a columnar format.
  Cause:
  
  Inverted Index Requirement: The error arises when you attempt to create a primary key that includes inverted individual characteristics in a row store table. Inverted indexes are a feature of column store tables that allow for efficient querying of individual values.
  Table Type Mismatch: The primary key definition may not be compatible with the table type (row store vs. column store). Column store tables have specific requirements for primary keys, especially when dealing with inverted indexes.
  
  Solution:
  
  Change Table Type: If your use case allows it, consider changing the table from a row store to a column store. This can be done in the table definition or during the creation of the table.
  Modify Primary Key Definition: Review the primary key definition and ensure that it does not include inverted individual characteristics if you intend to keep the table as a row store. You may need to redefine the primary key to comply with the requirements of the row store.
  Use Composite Keys: If applicable, consider using composite keys that do not involve inverted individual characteristics.
  Consult Documentation: Refer to the SAP HANA documentation for guidelines on defining primary keys in column store tables and the implications of using inverted indexes.
  
  Related Information:
  
  SAP HANA Documentation: Check the official SAP HANA documentation for detailed information on table types, primary key definitions, and inverted indexes.
  SAP Community: Engage with the SAP Community forums to see if others have encountered similar issues and to find additional solutions or workarounds.
  Performance Considerations: Understand the performance implications of using column store versus row store, especially in terms of data retrieval and storage efficiency.
  
  By addressing the primary key definition and ensuring compatibility with the intended table type, you should be able to resolve the DT754 error.