How To Fix RSDS246 - &1: Fields with variable length (STRG, SSTR, RSTR) must not be key fields

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDS - New DataSource

• Message number: 246

• Message text: &1: Fields with variable length (STRG, SSTR, RSTR) must not be key fields

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSDS246 - &1: Fields with variable length (STRG, SSTR, RSTR) must not be key fields ?

  The SAP error message RSDS246 indicates that there is an issue with the definition of a DataSource in SAP BW (Business Warehouse). Specifically, it states that fields with variable length types (such as STRG, SSTR, RSTR) cannot be defined as key fields in the DataSource. This is a common issue when working with DataSources that involve variable-length character fields.
  Cause:
  The error occurs because SAP BW requires key fields to have a fixed length. Variable-length fields can lead to inconsistencies and complications in data processing, especially when it comes to indexing and performance. Key fields are used to uniquely identify records in a table, and having variable-length fields as key fields can create ambiguity.
  Solution:
  To resolve this error, you need to modify the DataSource definition to ensure that no variable-length fields are designated as key fields. Here are the steps to do this:
  
  
  Identify the DataSource: Determine which DataSource is causing the error. This is usually indicated in the error message.
  
  
  Access the DataSource Definition:
  
  Go to the Data Warehousing Workbench (transaction code RSA1).
  Navigate to the DataSources section and find the specific DataSource.
  
  
  
  Edit the DataSource:
  
  Open the DataSource for editing.
  Review the fields defined in the DataSource and identify any fields that are of type STRG, SSTR, or RSTR.
  
  
  
  Change Key Field Definition:
  
  If any of the variable-length fields are marked as key fields, you need to remove them from the key field list.
  You can either change the field type to a fixed-length type (if applicable) or select a different field that is of a fixed length to serve as the key field.
  
  
  
  Save and Activate: After making the necessary changes, save the DataSource and activate it.
  
  
  Test the DataSource: After activation, test the DataSource to ensure that it works correctly without generating the error.
  
  
  Related Information:
  
  Field Types: In SAP, fields can be defined with different types, including fixed-length (CHAR) and variable-length (STRING). Understanding these types is crucial for proper DataSource design.
  DataSource Design Best Practices: When designing DataSources, always consider the implications of field types on performance and data integrity. Use fixed-length fields for keys whenever possible.
  SAP Notes: Check for any relevant SAP Notes or documentation that may provide additional guidance or updates related to this error.
  
  By following these steps, you should be able to resolve the RSDS246 error and ensure that your DataSource is correctly configured.