OData Concept
Published: December 2025
OData Service Project
The very first thing needs to be created when developing a new SAP OData is an OData service project through transaction code SEGW. An OData service project is the codebase where you:
- Define your data model
- Configure OData endpoints
- Connect to a database or backend system
- Implement business logic and security
- It acts as a data access layer for other apps.
Every Odata ABAP service Project contains mainly:
- Data Model
- Service Implementation
- Runtime Artifacts
- Service Maintainence
Data Model: Entity, Entity Set, Entity Type, Association, Association Set
Entity Type : is an option to maintain collection of fields with data type and length. Entity type is similar to a STRUCTURE in normal ABAP.
Entity : is an option to hold single record at a time. ENTITY is similar to WORKAREA in normal ABAP.
Entity Set : is an option to hold collection of records. ENTITYSET is similar to INTERNAL TABLE in normal ABAP.
Association : is the relationship between two Entity Types
Association Set : is the relationship between two Entity Sets
Note : under single Odata Project, we can create any number of Entity Types, ENTITYSETs
Service Implementation
Mainly contains CRUD methods. The methods are shown in the following table:
| SAP UI5/FIORI | ODATA Service |
|---|---|
| create -------> | Create_ENTITY( ) method -> C -> INSERT statement |
| bindElement --------> | GET_ENTITY( ) method -> R -> SELECT Query ( 0/1 ) |
| bindRows/bindItems----> | GET_ENTITYSET( ) method -> R -> SELECT QUERY ( 0/1/N ) |
| update ------> | UPDATE_ENTITY( ) method -> U -> UPDATE statement |
| remove -------> | DELETE_ENTITY( ) method -> D -> DELETE statement |
Runtime Artifacts
Runtime Artifacts mainly contains Runtime Classes ( which are autogenerated ).
_MPC -> Model Provider Class ( ***** )
_MPC_EXT -> Model Provider Extension Class
_DPC -> Data Provider Class
_DPC_EXT -> Data PRovider Extension Class ( ***** )
_SRV -> REGISTERED SERVICE
_MDL -> REGISTERED MODEL
Service Maintenance
Error log -> to trace/find out errors occured during service execution
Gateway Client -> temporary screen to test OData Service functionality
Register -> To register odata service under SAP NW Gateway. Other option to register service is through transaction code /IWFND/MAINT_SERVICE
