How To Fix DT457 - Field &: Type & is not allowed in a cluster table

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 457

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

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT457 - Field &: Type & is not allowed in a cluster table ?

  The SAP error message DT457 indicates that there is an issue with the data type being used in a cluster table. Specifically, it means that the field type specified is not allowed in a cluster table. Cluster tables in SAP are used to store data that is logically related and can be compressed to save space. However, there are restrictions on the types of fields that can be included in these tables.
  Cause:
  The error typically arises due to one of the following reasons:
  
  Invalid Data Type: The field you are trying to define in the cluster table has a data type that is not permitted. For example, certain data types like STRING, XSTRING, or complex types may not be allowed.
  Field Length: The length of the field may exceed the maximum allowed length for cluster tables.
  Incorrect Table Definition: The structure of the table may not conform to the requirements for cluster tables.
  
  Solution:
  To resolve the DT457 error, you can take the following steps:
  
  
  Check Data Types: Review the data types of the fields you are trying to include in the cluster table. Ensure that you are using only allowed data types such as:
  
  CHAR
  NUMC
  DATS
  TIMS
  INT1, INT2, INT4, etc.
  
  
  
  Modify Field Lengths: If any field exceeds the maximum length allowed for cluster tables, consider reducing the length or changing the data type.
  
  
  Review Table Structure: Ensure that the overall structure of the cluster table adheres to SAP's guidelines for cluster tables. This includes checking for primary keys and ensuring that the table is defined correctly.
  
  
  Use Transparent Tables: If you find that the data structure you are trying to implement cannot be accommodated in a cluster table, consider using a transparent table instead, which has fewer restrictions on field types.
  
  
  Consult Documentation: Refer to SAP documentation or the ABAP Dictionary for more details on the limitations and requirements for cluster tables.
  
  
  Related Information:
  
  Cluster Tables: These are special types of tables in SAP that store data in a compressed format. They are typically used for storing data that is frequently accessed together.
  ABAP Dictionary: The ABAP Dictionary (SE11) is the tool used to define and manage database objects in SAP, including tables, views, and data elements.
  SAP Notes: Check SAP Notes for any specific updates or patches related to this error message, as there may be known issues or fixes provided by SAP.
  
  By following these steps, you should be able to identify the cause of the DT457 error and implement a suitable solution.