How To Fix FDT_EXPRESSIONS642 - Aggregation selection is allowed only with transparent tables

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_EXPRESSIONS - Formula & Derivation Tool: Expressions

• Message number: 642

• Message text: Aggregation selection is allowed only with transparent tables

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS642 - Aggregation selection is allowed only with transparent tables ?

  The SAP error message FDT_EXPRESSIONS642 indicates that there is an issue with the aggregation selection in your data model, specifically when working with non-transparent tables. This error typically arises in the context of SAP's Financial Data Management (FDM) or when using the SAP Fiori applications that involve data aggregation.
  Cause:
  The error occurs because aggregation operations (like SUM, AVG, etc.) are only permitted on transparent tables in SAP. Transparent tables are database tables that have a one-to-one relationship with the underlying database table. Non-transparent tables, such as pooled tables or cluster tables, do not support aggregation in the same way.
  Solution:
  To resolve this error, you can consider the following approaches:
  
  
  Use Transparent Tables: Ensure that the data source you are trying to aggregate is a transparent table. If you are currently using a non-transparent table, you may need to switch to a transparent table that contains the necessary data.
  
  
  Modify Data Model: If you have control over the data model, consider redesigning it to use transparent tables for the aggregation operations. This may involve creating new transparent tables or views that consolidate the necessary data.
  
  
  Check Data Source Configuration: Review the configuration of your data source in the SAP system. Ensure that the data source is set up correctly and that it points to a transparent table.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific module or application you are working with. There may be additional guidelines or best practices for handling data aggregation.
  
  
  Seek Help from SAP Support: If you are unable to resolve the issue, consider reaching out to SAP support for assistance. They can provide guidance based on your specific system configuration and requirements.
  
  
  Related Information:
  
  Transparent Tables: These are the most common type of tables in SAP, where each table corresponds directly to a database table. They are used for storing application data.
  Pooled and Cluster Tables: These are special types of tables in SAP that are used for specific purposes, such as storing data from multiple applications in a single table. They do not support aggregation in the same way as transparent tables.
  SAP Fiori and FDM: If you are using SAP Fiori applications or Financial Data Management, ensure that your data models and sources are compatible with the requirements for aggregation.
  
  By following these steps, you should be able to address the FDT_EXPRESSIONS642 error and successfully perform the desired aggregation operations in your SAP environment.