Connect to GraphQL Data in CloverDX (formerly CloverETL)

The CData JDBC Driver for GraphQL enables you to use the data transformation components in CloverDX (formerly CloverETL) to work with GraphQL as sources. In this article, you will use the JDBC Driver for GraphQL to set up a simple transfer into a flat file. The CData JDBC Driver for GraphQL enables you to use the data transformation components in CloverDX (formerly CloverETL) to work with GraphQL as sources. In this article, you will use the JDBC Driver for GraphQL to set up a simple transfer into a flat file.

Connect to GraphQL as a JDBC Data Source

1. Create the connection to GraphQL data. In a new CloverDX graph, right-click the Connections node in the Outline pane and click Connections -> Create Connection. The Database Connection wizard is displayed.
2. Click the plus icon to load a driver from a JAR. Browse to the lib subfolder of the installation directory and select the cdata.jdbc.graphql.jar file.
3. Enter the JDBC URL.

   You must specify the URL of the GraphQL service. The driver supports two types of authentication:

   • Basic: Set AuthScheme to Basic. You must specify the User and Password of the GraphQL service.
   • OAuth 1.0 & 2.0: Take a look at the OAuth section in the Help documentation for detailed instructions.

   Built-in Connection String Designer

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

   java -jar cdata.jdbc.graphql.jar

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

   A typical JDBC URL is below:

   jdbc:graphql:AuthScheme=Basic;User=username;Password=password;URL=https://mysite.com;InitiateOAuth=GETANDREFRESH

Query GraphQL Data with the DBInputTable Component

1. Drag a DBInputTable from the Readers selection of the Palette onto the job flow and double-click it to open the configuration editor.
2. In the DB connection property, select the GraphQL JDBC data source from the drop-down menu.
3. Enter the SQL query. For example: SELECT Name, Email FROM Users WHERE UserLogin = 'admin'

Write the Output of the Query to a UniversalDataWriter

1. Drag a UniversalDataWriter from the Writers selection onto the jobflow.
2. Double-click the UniversalDataWriter to open the configuration editor and add a file URL.
3. Right-click the DBInputTable and then click Extract Metadata.
4. Connect the output port of the DBInputTable to the UniversalDataWriter.
5. In the resulting Select Metadata menu for the UniversalDataWriter, choose the Users table. (You can also open this menu by right-clicking the input port for the UniversalDataWriter.)
6. Click Run to write to the file.