Overview
Many users have implemented many HANA Calculation Views on top of SAP BW/4HANA and may asking, how they can use these HANA Calculation Views on SAP Datasphere.
This article describes how you can use HANA Calculation View to access data from SAP Datasphere (BW-Bridge space or Datasphere native space via Datasphere View).
How to get this working we need to bring our BW objects into BW Bridge. As soon as BW objects are brought to BW Bridge, we will find BW objects as Remote Tables in BW Bridge space in SAP Datasphere. Instead of using BW objects via BW Bridge you can also use ABAP or HANA tables directly via system connection.
After that we need to share this Remote Tables to SAP Datasphere native space. In this space we have to create Datasphere View based on these shared Remote Tables.
Via user-provided-service HDI Container we can see the SAP Datasphere Views and we have directly access the data. Via HDI-shared Container, in which HANA Calculation Views will be deployed, we have an access to Datasphere Views in user-provided-service HDI Container. Therefore we can create HANA Calculation Views and use Synonymes (pointed to Datasphere Views in user-provided-service HDI Container) as datasources.
1. Create BTP Dev Space
2. Create a new Database Project from template
3. Create a new HDI service instance (HDI-shared)
4. Connect to Cloud Foundry
5. Bind user provided service
6. Build and deploy project
7. Share your BW Bridge in BW Bridge Space to native Datasphere space
8. Create Datasphere View with shared BW Bridge object as data source
9. Create Remote Table in native Datasphere Space
10. Grant access to SAP Datasphere objects
11. Create Synonymes to have an access to Datasphere objects
12. Build and deploy project
13. Create a new HANA Calculation View with Synonymes as data source
Precondition
User-provided service and its relevant database user are created on the SAP Datasphere target space (not BW Bridge space)
To be migrated BW objects are already in BW Bridge or the needed HANA database connection for direct access via Tables is implemented to SAP Datasphere space (in which user-provided service is enabled).
Implementation
1. Create BTP Dev space
Create application in BTP Dev space
Start Business Application Studio with clicking on the Dev space
2. Create a New Business Application Project
Choose SAP HANA Database Project
Enter SAP HANA Database Project Name
Enter module name = db
Choose Database Version and bind database module to run-time service instance
3. Create a new HDI service instance
Note!
If the service instance name (hdi-shared) has not been created than please make entry as shown on the left side. The service instance name will be created in Cloud Foundry and you can find it with command: cf8 services.
4. Login to Cloud Foundry (if you are still not logged in to Cloud Foundry)
Use Command Palette to open the login
Note!
Normally you do not need to use Command Palette, since you will be asked to login to Cloud Foundry, if you are not connected
Enter Endpoint and open new browser to generate SSO passcode (if you are still not logged in to Cloud Foundry)
Generate SSO passcode (if you are still not logged in to Cloud Foundry)
Paste the SSO passcode and login (if you are still not logged in to Cloud Foundry)
Select organization and space
5. Bind user provided service
Add database connection for the UPS (User Provided Service)
Note!
The user-provided service instance name can be found in Cloud Foundry with command: cf8 services.
Check MTA.YAML file (DO NOT MODIFY)
After connecting with the user-provided service instance, the YAML file is automatically modified as follow:
Note!
Please do not make any modification in MTA.YAML file. The file will be modified during adjustment in Database connection (see above)
Bind the user-provided service
Note!
After bind icon is klicked the pop up will show as seen below and choose the user-provided service (in this case „Datasphere_XXXXXXXXX“)
6. Build and deploy project
Note!
The database objects will be builded and deployed in the hdi-shared service
Open Database Explorer to see deployed objects
Check project structure
Note!
File structure should looks like on the left side and still empty.
7. Share BW Bridge objects to native Datasphere Space
Share BW Bridge objects to native Datasphere Space
Note!
The objects have to be migrated first into BW Bridge
Share BW Bridge objects to native Datasphere Space
Open Data Builder in native Datasphere Space
8. Create Graphical View in native Datasphere Space
Deploy Graphical View
Note!
By using Graphical View the object is visible in user-provided service (HDI Container: Datasphere_XXXXXX)
9. Create Remote Table in native Datasphere Space
Choose connection
Filter and select table / view
10. Grant access to SAP Datasphere objects
11. Create Synonymes to have an access to Datasphere objects
Note!
The access on Datasphere objects is feaseble through synonyme
Create default access role
12. Build and deploy the project
13. Create a new HANA Calculation View with Synonymes as data source
Add Data Source
Choose Synonym as Data Source
Open details panel of projection
Fields mapping
Connect Projection node to Aggregation node
Expand details panel of Aggregation node
Fields mapping of Aggregation node
Build and deploy Calculation View
Data Preview
Summary
As mentioned above we are now able to access SAP Datasphere data via SAP HANA Calculation View. We can also use our existing on Premise HANA Calculation View (XS Classic or XS Advanced) on top of SAP Datasphere by importing it in Business Application Studio, but datasource and field replacements need to be made, since the datasource name as well as fieldnames could be differs.
@Adam Kosak & @Gabriel Aras: thanks for your support.
Please let me know, if you have any questions.
Thank you
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