How To Fix RSODP_ABAP_CDS210 - Data extraction via delta element requires at least one key element

SAP Error Message - Details

• Message type: E = Error

• Message class: RSODP_ABAP_CDS -

• Message number: 210

• Message text: Data extraction via delta element requires at least one key element

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSODP_ABAP_CDS210 - Data extraction via delta element requires at least one key element ?

  The SAP error message RSODP_ABAP_CDS210 indicates that there is an issue with data extraction via a delta element in a Core Data Services (CDS) view. Specifically, it states that at least one key element is required for the delta extraction to function properly.
  Cause:
  The error typically arises when you are trying to perform a delta extraction using a CDS view that does not have a defined key field. Delta extraction relies on key fields to identify changes in the data since the last extraction. If the CDS view lacks a primary key or if the key fields are not properly defined, the extraction process cannot determine which records have changed, leading to this error.
  Solution:
  To resolve the RSODP_ABAP_CDS210 error, you can take the following steps:
  
  
  Check the CDS View Definition:
  
  Open the CDS view in the ABAP Development Tools (ADT) or the relevant transaction (e.g., SE11).
  Ensure that the view has at least one key field defined. Key fields are typically defined using the @Key annotation in the CDS view.
  
  
  
  Add Key Fields:
  
  If the view does not have any key fields, you need to add them. Identify the appropriate fields that can serve as unique identifiers for the records in your dataset.
  Modify the CDS view to include these fields as key fields.
  
  Example:
  define view my_cds_view
  as select from my_table
  {
      key field1,
      key field2,
      field3,
      field4
  }
  
  
  Activate the CDS View:
  
  After making changes to the CDS view, make sure to activate it. This will ensure that the changes take effect.
  
  
  
  Test the Delta Extraction:
  
  Once the CDS view is properly defined with key fields, test the delta extraction process again to verify that the error has been resolved.
  
  
  
  Related Information:
  
  Delta Extraction: Delta extraction is a method used in data warehousing to extract only the data that has changed since the last extraction. This is more efficient than full data extraction, especially for large datasets.
  CDS Views: Core Data Services (CDS) views are a way to define semantic data models in SAP. They allow for the creation of complex queries and data models that can be consumed by various SAP applications.
  Key Fields: Key fields are essential for uniquely identifying records in a dataset. In the context of delta extraction, they help track changes and ensure that only modified records are extracted.
  
  By ensuring that your CDS view has the necessary key fields, you should be able to resolve the RSODP_ABAP_CDS210 error and successfully perform delta extractions.