ABAP EDGE: OData 1: Create First OData Project for Read Operation

Sunday, May 31, 2026

OData 1: Create First OData Project for Read Operation

In this post will create OData project for read operation

Ø Step 1: Execute SEGW Transaction

Ø Step 2: Provide OData Project Name, Description and Project Type as below:

Ø Step 3: Right click on Data Model, Click on Import where we can see the multiple options for creating Entity Set (Since we are creating Declarative data model) will click on entity type as shown in Step 4).

Ø Step 4: In this example we will create Entity type manually by Right click on Entity Types, provide Entity type name (in Camel case) and click on Create Related Entity Set Check box for creating Entity Set Entity Set

Note: One Entity Type we can used in many Entity Set

Ø Step 5: Click on Property, click on Append Row or Insert Row button and add field name, data type, length etc. as below (This is called as Declarative data model since we are declaring manually all the field name and length etc.):

Note: Entity type also has to have at least one property marked as the Key property.
Note: In case of date field, quantity and amount field always click on the Nullable check box. To avoid error in case of blank value in this field.
Note: For better metadata readable always provide all the details, ex. Max field length, filterable value like which field have filterable value etc.
Note: In case of Date format kindly follow below details, provide date field name, click on Enter and click on ABAP type editor as below:

Provide Mode as Explicit Assignment, Category as Date Element and Associated Type as Date Element so that date timestamp value will automatically convert to Date format

Ø Step 6: Select Project and click on Generate Runtime Object Button so that Run time artifacts will create

Note: When we perform any Date model or Entity type related activity like create new entity type, add new field in entity, modify field length, assign any key field then always Re-generate Runtime object.

Ø Step 7: Here we can see the Run time artifacts details, click on continue and provide package name

Ø Step 8: We can see the run time artifacts details as below:

Ø Step 9: Click on Service Implementation and Redefine the required method, In this scenario we are going to Redefine the GetEntity (Read) as below:

Step to Redefine method:
Go to DPX_EXT class: ZCL_ZODATA_PROJECT_DPC_EXT
Find the method: SALESHEADERSET_GET_ENTITY
Click on Redefine as below:

See the Redefine method as below:

Save check and activate method and check into the Service implementation

Note: For best practices, always create one Global class in SE24 (called as API class) and write all your logic inside that global class/method and call API global class inside the DPC_EXT, method. So that we can reuse that logic in another API as well.

Ø Step 10: Go to the Project, Copy the Service Suffix <_SRV> as se in the below Project

Ø Step 11: Execute transaction /IWFND/MAINT_SERVICE or /N/IWFND/MAINT_SERVICE and click on Add Service button

Ø Step 12: Select the System Alias as “LOCAL” (If Deployment type is “Central Hub Deployment” then provide the RFC system name as Alias name), provide the service name and click on enter, one Service show below select the service and click on “Add Selected Service” button

Ø Step 13: Popup show as below, select package and click on continue

Ø Step 14: Once click on continue, Information popup message show as “Service loaded successfully”

Note: If you see the Service registered successfully but the service is not active then pls activate the service as below:
Again, Execute the Transaction /IWFND/MAINT_SERVICE or /N/IWFND/MAINT_SERVICE, filter your service and see the ICF Node, If ICF Node status not show as green color as below then activate the service