How To Fix RSOH021 - Place key fields at beginning of field list

SAP Error Message - Details

• Message type: E = Error

• Message class: RSOH - Messages for Open Hub Interface and for InfoSpoke

• Message number: 021

• Message text: Place key fields at beginning of field list

What causes this issue?

You want to save an InfoSpoke that needs to be extracted into a
database table. The database table is generated with a template of the
field list specified in the InfoSpoke. The generation presupposes that
all table key fields are complete at the beginning. This does not exist
in the current version.

System Response

The InfoSpoke check failed.

How to fix this error?

Place the key fields at the beginning of the field list. Choose the
respective button underneath the list.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message RSOH021 - Place key fields at beginning of field list ?

  The SAP error message RSOH021, which states "Place key fields at beginning of field list," typically occurs in the context of SAP BW (Business Warehouse) when you are trying to create or modify a query or InfoProvider. This error indicates that the key fields (which are essential for identifying records) must be positioned at the beginning of the field list in your query definition.
  Cause:
  The primary cause of this error is that the query definition does not adhere to the requirement that key fields must be listed first. Key fields are crucial for the integrity of the data model and are used for grouping and filtering data in queries. If they are not placed at the beginning, the system cannot process the query correctly.
  Solution:
  To resolve the RSOH021 error, follow these steps:
  
  
  Identify Key Fields: Determine which fields in your query are considered key fields. These are typically fields that uniquely identify records in your data model, such as IDs or primary keys.
  
  
  Rearrange Field List: Go to the query definition in the SAP BW Query Designer or the relevant transaction where you are defining your query. Rearrange the fields in the field list so that all key fields are positioned at the top of the list.
  
  
  Save Changes: After rearranging the fields, save your changes and try to execute the query again.
  
  
  Test the Query: Run the query to ensure that it works correctly without any errors.
  
  
  Related Information:
  
  Key Fields: In SAP BW, key fields are essential for data retrieval and are often used in aggregations and filters. They are typically defined in the InfoObject or InfoProvider.
  Query Designer: This is the tool used to create and modify queries in SAP BW. Familiarity with its interface and functionalities can help in efficiently managing queries.
  Documentation: Refer to SAP Help documentation for more details on query design best practices and the importance of key fields in SAP BW.
  
  If you continue to experience issues after following these steps, consider checking for any additional constraints or settings in your InfoProvider or consult with your SAP BW administrator for further assistance.