How To Fix DT456 - Field &: Type DECFLOAT (&) not allowed in key of a pooled table

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 456

• Message text: Field &: Type DECFLOAT (&) not allowed in key of a pooled table

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DT456 - Field &: Type DECFLOAT (&) not allowed in key of a pooled table ?

  The SAP error message DT456 indicates that you are trying to use a DECFLOAT data type as a key field in a pooled table. In SAP, pooled tables are designed to store data in a way that allows for efficient storage and retrieval, and they have specific restrictions on the types of fields that can be used as keys.
  Cause:
  The DECFLOAT data type is not allowed as a key field in pooled tables due to the way pooled tables are structured and how they manage data. Pooled tables are typically used for storing small amounts of data that can be combined into a single table in the database, and they require key fields to be of certain types that can be efficiently managed.
  Solution:
  To resolve this error, you need to change the data type of the key field in your pooled table definition. Here are the steps you can take:
  
  
  Change the Data Type: Modify the key field from DECFLOAT to a supported data type. Commonly used types for key fields in pooled tables include:
  
  CHAR
  NUMC
  INT4
  DATS
  TIMS
  
  
  
  Redefine the Table: After changing the data type, you may need to redefine the table and regenerate the associated objects in the ABAP Dictionary.
  
  
  Check Dependencies: Ensure that any dependent objects (like views, programs, or function modules) that reference this table are also updated accordingly.
  
  
  Test the Changes: After making the changes, test the table to ensure that it behaves as expected and that the error no longer occurs.
  
  
  Related Information:
  
  Pooled Tables: These are special types of tables in SAP that are used to store data in a compact form. They are part of the database table pool and are designed for specific use cases, such as storing configuration or control data.
  Data Types in ABAP: Familiarize yourself with the different data types available in ABAP and their appropriate use cases. The ABAP Dictionary provides a comprehensive list of data types and their characteristics.
  SAP Documentation: Refer to the official SAP documentation for more details on table types, data types, and best practices for designing database tables in SAP.
  
  By following these steps and understanding the limitations of pooled tables, you should be able to resolve the DT456 error effectively.