Gateway Service Builder (SEGW)

What are SEGW's Import options versus its Redefine options for building the data model?

When would you reach for the GenIL redefinition in SEGW rather than RFC/BOR import?

A teammate says SEGW is only for hand-coding OData services and you should use a separate generator wizard for RFC-based ones. What's wrong with that?

You need to add custom back-end logic to a generated SEGW service. Which class do you touch, and which must you never edit?

Which five operations does the Service Implementation folder list per entity set in SEGW?

Why is RFC/BOR import the most common starting point for new Gateway OData services, rather than modeling entities by hand?

After importing an RFC/BOR interface, you map GetEntitySet to the data source. What's the step people skip, and what does it catch?

Your service shows up in SEGW but returns 404 when you call it. In which deployment is this most likely a missing manual step, and why?

What does it actually mean to put a data dictionary binding on an SEGW entity type — and what does that buy versus modeling fields by hand?

Service development (code-based) vs service generation in SAP Gateway — what's the trade, and which do you pick when an adequate source already exists?

You use Include → OData Service (GW) to mash up two existing services. What happens to those included services, and why does that matter for ownership?

Redefine → OData Service (GW) vs the plain OData Service option: one needs an SM59 destination. Which, and why?

Why is redefinition preferred over editing an original service directly when you need to add entities or properties?

When you pick DDIC Structure import in SEGW, which kinds of source objects can it reuse — and which import option do you need instead for an RFC?

What does pressing Generate in SEGW actually produce, and why must you re-run it after every model change?

Across the three phases of OData service creation, which one do you typically do exactly once — and what's the wasted effort if you assume otherwise?

Your BEx query doesn't appear in the SEGW BW Query wizard. What's the first thing to check on the query itself?

During runtime artifact generation in a hub setup, the ABAP classes and the technical service names register in two different places. Which goes where, and why does that split matter?

In the BW Query Service wizard, your Easy-Query-flagged queries still don't show up. Which access-type selection filters the list to them?

Through which integration does SEGW consume a BOPF business object — and how is that different from the BOL/GenIL path?

What's the specific signal that Search Help import is the right SEGW choice, rather than DDIC or RFC/BOR import?

Redefine → OData Service (GW) can overwrite an existing Gateway-generated service, not just extend one. When is overwrite the intended technique, and what's the risk of reaching for it casually?

You smoke-test a freshly registered OData service in the Gateway Client and Execute returns HTTP 200. Are you done, and what's the next step that actually proves data flows?

Why are SAP BW Easy Queries the precondition for building a Fiori app on top of a BW analytic query?