Tag: ODATA

ODATA V4 activation

This blog will explain how to activate ODATA V4.

Questions that will be answered in this blog are:

  • How to activate ODATA V4 on your SAP system?
  • Does SAP support ODATA V3?
  • Do all consuming applications support ODATA V4?
  • What are the differences of ODATA V2 and V4?

ODATA V4

In the typical FIORI use case you will activate ODATA V2. SAP has skipped ODATA V3. ODATA V4 is supported by SAP.

Constraints of SAP ODATA V4 are listed in OSS note 2322624 – SAP Gateway SAP_GWFND OData V4 protocol – Known Constraints.

Filtering is powerful in ODATA V4. Read more on this in OSS note 2305033 – SAP Gateway OData V4 $flter Consulting Note.

Keep in mind not all application fully support all aspects of ODATA V4 or might not be able to consume ODATA V4 at all. Check first with the consumer before publishing an ODATA on V4.

Activation of ODATA V4

First step in activation is to check the virus scan settings for ODATA:

Activation of ODATA V4 messages via service administration:

Or use transaction /iwbep/v4_admin:

And for the front end /iwfnd/v4_admin:

Press button Add service groups:

Push the button Get Service Groups:

And select your entry and press Publish Service Groups:

Which one to publish has to be told to you. The consultant requesting it might link to the API hub.

After activation, you can use the Service Test button to check if the activation is ok:

On the screen hit Execute and the result should be a HTTP 200 success message:

OSS notes and background

Background notes:

Bug fix OSS notes:

Useful background blogs:

Differences between ODATA V2 and V4

For UI consumption differences between ODATA V2 and V4 read this SAP help file.

Generic blog on main differences ODATA V2 and V4: read here.

Or read this SAP blog on differences ODATA V2 and V4 for SAP specific.

SAP interfacing: ODATA

In the previous blog we have setup RFC enabled function module. If you want to expose this function module as ODATA service you can use the wizard in transaction SEGW. This blog assumes the basis ODATA basis activation has been performed (see this blog).

Questions that will be answered in this blog are:

  • How do I generate an ODATA service based on a RFC function module?
  • How do I test if the ODATA service is properly working?

Set up of the ODATA service

Start transaction SEGW and create a new project:

Now start the RFC import wizard by right clicking on Data Model and selecting the option Import and then RFC/BOR interface:

Now select the data parameters:

And enter which field is key field:

After pressing finish the wizard will generate the needed classes.

Save your work and press the check button to validate if everything is ok:

Now we need to map the implementation to the RFC module. Right click on the GetEntitySet below ZODATADEMOENTITYSet and select Map to Data Source:

Now map the fields (you can use drag and drop):

Now you need to map the data fields correctly and press check.

Save your work.

Generation of objects

You can see that the Runtime Artifacts section is still empty.

Now press the button Generate Runtime Artifacts:

Wait for the generation to finish:

Now the runtime artifacts are generated, but the service maintenance is not done yet. Open the section Service maintenance and double click on the system:

Now press the Register Service button:

Accept settings and assign package for transport:

Now the registration status is green.

Testing the ODATA service

Press the button SAP Gateway Client (or start transaction /IWFND/GW_CLIENT directly, and then enter the correct service):

The test client starts:

Enter the correct inputdata: /sap/opu/odata/SAP/ZODATADEMO_SRV/ZODATADEMOENTITYSet(‘1’)

And check the output:

Attention points

The example above seems simple, but you will face more issues in real live implementation when you need to add tables and more complex structures. In those cases additional configuration and many times extra coding in the methods of the generated classes is required.

Nice blogs to start with:

ODATA security

The user calling the ODATA service needs a special right in SAP to be allowed to call the ODATA service.

Start transaction PFCG and create a new role. On the menu tab select the option Authorization Default. Then select type Tadir and object type IWSV gateway business suite enablement. Now you can finally search for our own developed and activated ODATA service:

Now save the role and assign it to the user(s) needing to call this ODATA service.

The application security relies on the function security authorization check inside the RFC function module.

ODATA V2 and V4

SAP is now moving from ODATA V2 towards ODATA V4. Read more on ODATA V4 activation in this blog.