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Which is the preferred approach when trying to read from an ECC system from S/4 HANA system? I am looking for pros and cons of using both approaches.

SDA gives me option to develop the application in S/4, without having to split the application into two components - one to be developed in S/4 and another to be done in ECC.

RFC is a well known approach and has been around for a while. It satisfies the rule - Always allow access to data only through application, and not directly to DB.

Points like Authorization checks, Upgrade of ECC, are immaterial.


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