SAP Fiori · OData & SAP Gateway Essentials

What are the four subconstraints of REST's uniform interface, and which is the one most APIs actually skip?

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More in OData & SAP Gateway Essentials

You configure the SAP system alias on a central hub Gateway exactly the way the embedded-deployment guide shows (alias LOCAL, Local GW checked, RFC destination NONE). What breaks?

A client sends a PUT to update just one property of an OData entity and is surprised the other fields got wiped. What did they get wrong, and what should they have used?

You need to fire a controlled test OData request (set the HTTP method, headers, body) against a service from inside the SAP system. Which built-in tool, and where do you launch it?

Management asks why you'd expose a Fiori app through OData/Gateway instead of a direct RFC/BAPI call. What is the architecturally significant reason (not 'it's a standard')?

A developer appends $metadata to a service URL expecting to see the records and gets an XML schema instead. What does $metadata actually return, and in what language?

What is OData, and which technologies is it built on?

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