How To Fix DO848 - Row type not allowed as key (table type is row type)

SAP Error Message - Details

• Message type: E = Error

• Message class: DO - Dictionary: Mass activation of domains and data elements

• Message number: 848

• Message text: Row type not allowed as key (table type is row type)

What causes this issue?

Only the standard key and unspecified settings are allowed as
<DS:TX.DDDOC_KEYDEF>key</> for a table type having a different table
type as <DS:TX.DDDOC_ROWTYPE>row type</>.
You chose row type as key.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Choose a valid key as table type or choose a different row type.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DO848 - Row type not allowed as key (table type is row type) ?

  The SAP error message DO848 ("Row type not allowed as key (table type is row type)") typically occurs when you are trying to use a row type as a key in a table type that is defined as a row type. This error is related to the way that SAP handles data structures in ABAP (Advanced Business Application Programming).
  Cause:
  
  Row Type vs. Table Type: In ABAP, a row type is a single record structure, while a table type is a collection of records. If you attempt to use a row type as a key for a table type that is defined as a row type, SAP will throw this error because it expects a different structure for the key.
  Incorrect Data Declaration: The error can also arise from incorrect data declarations in your ABAP code, where you might be trying to use a row type in a context that requires a table type.
  
  Solution:
  
  Check Data Declarations: Review your ABAP code to ensure that you are using the correct data types. If you need to use a key for a table type, make sure that the key is defined correctly and is compatible with the table type.
  Use Appropriate Key Structure: If you are working with a table type, ensure that the key fields are defined as part of the table type's structure. You may need to define a separate structure that includes the key fields and use that structure as the key.
  Modify Table Type Definition: If you have control over the table type definition, consider modifying it to allow for the correct key structure. This may involve changing the definition from a row type to a more appropriate structure that can accommodate keys.
  Debugging: Use the ABAP debugger to trace where the error occurs in your code. This can help you identify the specific line or operation that is causing the issue.
  
  Related Information:
  
  ABAP Data Types: Familiarize yourself with the different data types in ABAP, including elementary types, structured types, and table types.
  SAP Documentation: Refer to the official SAP documentation for more details on data types and structures in ABAP.
  Community Forums: Consider checking SAP community forums or Stack Overflow for similar issues and solutions shared by other developers.
  
  By ensuring that you are using the correct data types and structures, you should be able to resolve the DO848 error in your ABAP code.