How To Fix MC732 - All fields are evaluated as key field

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 732

• Message text: All fields are evaluated as key field

What causes this issue?

In the view, not all of the mandatory fields were included as key
fields. The key of the view therefore is not unique.

System Response

All the fields are regarded as key fields in order to guarantee that
the key lengths are unique.

How to fix this error?

For views with a large number of fields, this could have a negative
effect on the performance for the language construction described
below. In this case, all the mandatory key fields should be included in
the view.
&HINTS&
The key information is relevant for the ABAP/4 language constructs
SELECT SINGLE, SELECT ... ORDER BY PRIMARY KEY and SELECT ... FOR ALL
ENTRIES.
In these cases, SELECT SINGLE is handled like a simple SELECT ...
ENDSELECT, where the first (random) record found is returned.
ORDER BY PRIMARY KEY and (indirect) SELECT FOR ALL ENTRIES sort
according to all fields in these cases.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC732 - All fields are evaluated as key field ?

  The SAP error message MC732 ("All fields are evaluated as key field") typically occurs in the context of reporting or data extraction in SAP, particularly when working with InfoObjects in the SAP BW (Business Warehouse) or when dealing with data models in SAP ERP.
  Cause:
  This error usually arises when the system is unable to determine a unique key for the data being processed. This can happen due to several reasons, including:
  
  
  Missing Key Fields: The data model or InfoObject may not have the necessary key fields defined, or the key fields are not populated correctly in the data being processed.
  
  
  Incorrect Data Model Configuration: The configuration of the InfoProvider or the data model may be incorrect, leading to the system treating all fields as key fields.
  
  
  Data Quality Issues: There may be issues with the data itself, such as duplicates or missing values that prevent the system from identifying a unique key.
  
  
  Aggregation Issues: If the query or report is trying to aggregate data without a proper key, it can lead to this error.
  
  
  Solution:
  To resolve the MC732 error, you can take the following steps:
  
  
  Check Key Field Configuration:
  
  Go to the InfoObject or InfoProvider definition and ensure that the key fields are correctly defined.
  Make sure that the key fields are populated in the data.
  
  
  
  Review Data Model:
  
  Check the configuration of the data model or InfoProvider to ensure that it is set up correctly.
  Ensure that the data source is correctly mapped to the InfoProvider.
  
  
  
  Data Quality Check:
  
  Perform a data quality check to identify any duplicates or missing values in the key fields.
  Clean the data if necessary to ensure that it meets the requirements for unique keys.
  
  
  
  Adjust Query Settings:
  
  If you are running a query, check the settings to ensure that the aggregation and key field settings are appropriate.
  Modify the query to include the necessary key fields for aggregation.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for specific guidance related to the version of SAP you are using.
  
  
  
  Testing:
  
  After making changes, test the report or data extraction again to see if the error persists.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as RSA1 (Data Warehousing Workbench) for BW or SE11 (Data Dictionary) for checking InfoObjects.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have encountered the same issue.
  
  By following these steps, you should be able to identify and resolve the cause of the MC732 error in SAP.