ETL SAP Netweaver Gateway in Oracle Data Integrator

Leverage existing skills by using the JDBC standard to read and write to SAP Netweaver Gateway: Through drop-in integration into ETL tools like Oracle Data Integrator (ODI), the CData JDBC Driver for SAP Netweaver Gateway connects real-time SAP Netweaver Gateway data to your data warehouse, business intelligence, and Big Data technologies.

JDBC connectivity enables you to work with SAP Netweaver Gateway just as you would any other database in ODI. As with an RDBMS, you can use the driver to connect directly to the SAP Netweaver Gateway APIs in real time instead of working with flat files.

This article walks through a JDBC-based ETL -- SAP Netweaver Gateway to Oracle. After reverse engineering a data model of SAP Netweaver Gateway entities, you will create a mapping and select a data loading strategy -- since the driver supports SQL-92, this last step can easily be accomplished by selecting the built-in SQL to SQL Loading Knowledge Module.

Install the Driver

To install the driver, copy the driver JAR (cdata.jdbc.sapgateway.jar) and .lic file (cdata.jdbc.sapgateway.lic), located in the installation folder, into the ODI appropriate directory:

• UNIX/Linux without Agent: ~/.odi/oracledi/userlib
• UNIX/Linux with Agent: ~/.odi/oracledi/userlib and $ODI_HOME/odi/agent/lib
• Windows without Agent: %APPDATA%\Roaming\odi\oracledi\userlib
• Windows with Agent: %APPDATA%\odi\oracledi\userlib and %APPDATA%\odi\agent\lib

Restart ODI to complete the installation.

Reverse Engineer a Model

Reverse engineering the model retrieves metadata about the driver's relational view of SAP Netweaver Gateway data. After reverse engineering, you can query real-time SAP Netweaver Gateway data and create mappings based on SAP Netweaver Gateway tables.

1. In ODI, connect to your repository and click New -> Model and Topology Objects.
2. On the Model screen of the resulting dialog, enter the following information:
   • Name: Enter SAPGateway.
   • Technology: Select Generic SQL (for ODI Version 12.2+, select Microsoft SQL Server).
   • Logical Schema: Enter SAPGateway.
   • Context: Select Global.
3. On the Data Server screen of the resulting dialog, enter the following information:
   • Name: Enter SAPGateway.
   • Driver List: Select Oracle JDBC Driver.
   • Driver: Enter cdata.jdbc.sapgateway.SAPGatewayDriver
   • URL: Enter the JDBC URL containing the connection string.

     SAP Gateway allows both basic and OAuth 2.0 authentication. You can use basic authentication to connect to your own account, or you can use OAuth to enable other users to retrieve data from your service with their accounts. In addition to authenticating, set the following connection properties to access SAP Gateway tables.

     • Url: Set this to the URL of your environment, or to the full URL of the service. For example, the full URL might appear as: https://sapes5.sapdevcenter.com/sap/opu/odata/IWBEP/GWSAMPLE_BASIC/. In this example, the environment URL would just be: https://sapes5.sapdevcenter.com.
     • Namespace: Set the appropriate Service Namespace. In the example above, IWBEP is the namespace. It is optional if the full URL to the service is specified.
     • Service: Set this to the service you want to retrieve data from. In the example above, the service is GWSAMPLE_BASIC. It is not required if the full URL is specified.

     Authenticate via Basic Authentication

     In basic authentication, you use your login credentials to connect. Set the following properties:

     • User: This is the username you use to log in to SAP Gateway.
     • Password: This is the password you use to log in to SAP Gateway.

     Authenticate via OAuth Authentication

     You can connect to SAP Gateway using the embedded OAuth connectivity (without setting any additional authentication connection properties). When you connect, the OAuth endpoint opens in your browser. Log in and grant permissions to complete the OAuth process. See the OAuth section in the online Help documentation for more information on other OAuth authentication flows.

     Built-in Connection String Designer

     For assistance in constructing the JDBC URL, use the connection string designer built into the SAP Netweaver Gateway JDBC Driver. Either double-click the JAR file or execute the jar file from the command-line.

     java -jar cdata.jdbc.sapgateway.jar

     Fill in the connection properties and copy the connection string to the clipboard.

     Below is a typical connection string:

     jdbc:sapgateway:User=user;Password=password;URL=https://sapes5.sapdevcenter.com/sap/opu/odata/IWBEP/GWSAMPLE_BASIC/;InitiateOAuth=GETANDREFRESH
4. On the Physical Schema screen, enter the following information:
   • Name: Select from the Drop Down menu.
   • Database (Catalog): Enter CData.
   • Owner (Schema): If you select a Schema for SAP Netweaver Gateway, enter the Schema selected, otherwise enter SAPGateway.
   • Database (Work Catalog): Enter CData.
   • Owner (Work Schema): If you select a Schema for SAP Netweaver Gateway, enter the Schema selected, otherwise enter SAPGateway.
5. In the opened model click Reverse Engineer to retrieve the metadata for SAP Netweaver Gateway tables.

Edit and Save SAP Netweaver Gateway Data

After reverse engineering you can now work with SAP Netweaver Gateway data in ODI. To edit and save SAP Netweaver Gateway data, expand the Models accordion in the Designer navigator, right-click a table, and click Data. Click Refresh to pick up any changes to the data. Click Save Changes when you are finished making changes.

Create an ETL Project

Follow the steps below to create an ETL from SAP Netweaver Gateway. You will load SalesOrderLineItems entities into the sample data warehouse included in the ODI Getting Started VM.

1. Open SQL Developer and connect to your Oracle database. Right-click the node for your database in the Connections pane and click new SQL Worksheet.

   Alternatively you can use SQLPlus. From a command prompt enter the following:

   sqlplus / as sysdba
2. Enter the following query to create a new target table in the sample data warehouse, which is in the ODI_DEMO schema. The following query defines a few columns that match the SalesOrderLineItems table in SAP Netweaver Gateway: CREATE TABLE ODI_DEMO.TRG_SALESORDERLINEITEMS (QUANTITY NUMBER(20,0),ProductID VARCHAR2(255));
3. In ODI expand the Models accordion in the Designer navigator and double-click the Sales Administration node in the ODI_DEMO folder. The model is opened in the Model Editor.
4. Click Reverse Engineer. The TRG_SALESORDERLINEITEMS table is added to the model.
5. Right-click the Mappings node in your project and click New Mapping. Enter a name for the mapping and clear the Create Empty Dataset option. The Mapping Editor is displayed.
6. Drag the TRG_SALESORDERLINEITEMS table from the Sales Administration model onto the mapping.
7. Drag the SalesOrderLineItems table from the SAP Netweaver Gateway model onto the mapping.
8. Click the source connector point and drag to the target connector point. The Attribute Matching dialog is displayed. For this example, use the default options. The target expressions are then displayed in the properties for the target columns.
9. Open the Physical tab of the Mapping Editor and click SALESORDERLINEITEMS_AP in TARGET_GROUP.
10. In the SALESORDERLINEITEMS_AP properties, select LKM SQL to SQL (Built-In) on the Loading Knowledge Module tab.

You can then run the mapping to load SAP Netweaver Gateway data into Oracle.