How To Fix DT458 - Field &: Type & is not allowed in the key of a cluster table

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 458

• Message text: Field &: Type & is not allowed in the key of a cluster table

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DT458 - Field &: Type & is not allowed in the key of a cluster table ?

  The SAP error message DT458 indicates that there is an issue with the definition of a cluster table in the SAP system. Specifically, it states that a certain field (denoted by &) of a certain type (denoted by &) is not allowed to be part of the key of a cluster table. 
  Cause:
  
  Field Type Restrictions: In SAP, certain data types are not permitted as key fields in cluster tables. For example, fields of type STRING, XSTRING, or certain complex types may not be allowed.
  Cluster Table Definition: The cluster table may have been incorrectly defined in the Data Dictionary (SE11), where a field that is not allowed as a key was mistakenly included.
  Data Model Design: The design of the data model may not comply with SAP's requirements for cluster tables, which are intended for specific types of data storage.
  
  Solution:
  
  Review Field Types: Check the data types of the fields defined in the cluster table. Ensure that all key fields are of types that are allowed in cluster tables (e.g., CHAR, NUMC, DATS, TIMS).
  Modify Table Definition: If a field that is not allowed as a key is included, you will need to remove it from the key fields of the cluster table. This can be done in the Data Dictionary (SE11) by editing the table definition.
  Consult Documentation: Refer to SAP documentation or the Data Dictionary documentation for a list of allowed field types for cluster tables.
  Recreate the Table: If the table definition is complex or if there are multiple issues, it may be easier to create a new cluster table with the correct key fields and migrate the data from the old table if necessary.
  
  Related Information:
  
  Cluster Tables: Cluster tables are used in SAP to store related data in a compressed format. They are typically used for data that is frequently accessed together, such as user master records.
  Data Dictionary (SE11): This is the transaction code used to access the Data Dictionary in SAP, where you can create and modify database objects like tables, views, and data elements.
  Field Types: Understanding the different field types and their restrictions is crucial when designing database tables in SAP. You can find this information in the SAP Help Portal or the ABAP documentation.
  
  If you continue to face issues after following these steps, consider reaching out to your SAP Basis or ABAP development team for further assistance.