When you read data from SAP tables, you can configure a mapping to perform delta extraction. With delta extraction, you can choose to read only the changed data.
The SAP table and SAP columns for which you want to perform delta extraction must be part of a change document object in SAP. For more information about creating a change document in SAP, see the SAP documentation.
The Secure Agent uses the CDHDR (Change Document Header) and CDPOS (Change Document Position) tables in SAP to extract the changed data. The CDHDR table stores the change document header information. The CDPOS table stores the new value and the old value of the changed data. The Secure Agent uses the change document number in the CDHDR table to find the latest change number in the CDPOS table.
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