How To Fix E2260 - Data type & is not allowed in the key field of a table

SAP Error Message - Details

• Message type: E = Error

• Message class: E2 - DE Data Dictionary

• Message number: 260

• Message text: Data type & is not allowed in the key field of a table

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message E2260 - Data type & is not allowed in the key field of a table ?

  The SAP error message E2260, which states "Data type & is not allowed in the key field of a table," typically occurs when you are trying to define a key field in a database table with a data type that is not permitted. In SAP, certain data types cannot be used as key fields due to their characteristics or the way they are handled in the database.
  Cause:
  The error is usually caused by one of the following reasons:
  
  
  Invalid Data Type: You are attempting to use a data type that is not allowed for key fields. Common disallowed data types include:
  
  Floating point types (e.g., F, D)
  String types (e.g., STRING, RAWSTRING)
  Complex types (e.g., structures)
  
  
  
  Field Length: The length of the field may also be an issue. Key fields typically have restrictions on their length.
  
  
  Table Type: The type of table you are trying to create (e.g., transparent table, pooled table, etc.) may have specific requirements regarding key fields.
  
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Change Data Type: Modify the data type of the key field to one that is allowed. Commonly accepted data types for key fields include:
  
  Character (C)
  Numeric (I, P)
  Date (D)
  Time (T)
  
  
  
  Check Field Length: Ensure that the length of the key field is appropriate. For example, character fields should typically not exceed 255 characters.
  
  
  Review Table Definition: If you are working with a specific type of table (like a pooled or cluster table), ensure that you are adhering to the rules for that table type.
  
  
  Use Composite Keys: If necessary, consider using a combination of fields as a composite key, ensuring that all fields in the composite key are of valid data types.
  
  
  Consult Documentation: Refer to the SAP documentation or the Data Dictionary (SE11) for more information on valid data types for key fields.
  
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like SE11 (Data Dictionary) to view and modify table definitions.
  SAP Notes: Check for any relevant SAP Notes that might provide additional context or solutions for specific scenarios.
  Data Dictionary: Familiarize yourself with the SAP Data Dictionary, which provides guidelines on data types and their usage in key fields.
  
  By following these steps, you should be able to resolve the E2260 error and successfully define your table's key fields.