How the “Default” flag works in the SAP System alias to the OData Service assignment¶
Here is a clear breakdown of how SAP OData service aliases work, with a focus on the purpose and behavior of the default flag in system selection:
| Case | A | B | C |
|---|---|---|---|
Multi origin (;mo parameter in request URL) | No | Yes | Not supported |
| Type | Requests routed to one system | Requests retrieving from multiple systems | One-system-only requests |
| Example | $metadata request | ||
| Multitude | 1 | N | 1 |
| “Default” flag used | Yes | No | Yes |
The “Default” flag is used by the system only in cases A and C, where it determines which system alias is selected.