VOOZH about

URL: https://www.cdata.com/kb/tech/databricks-jdbc-google-data-fusion.rst

⇱ Build Databricks-Connected ETL Processes in Google Data Fusion

Build Databricks-Connected ETL Processes in Google Data Fusion

👁 Jerod Johnson
Jerod Johnson
Director, Technology Evangelism
Load the CData JDBC Driver into Google Data Fusion and create ETL processes with access live Databricks data.

Google Data Fusion allows users to perform self-service data integration to consolidate disparate data. Uploading the CData JDBC Driver for Databricks enables users to access live Databricks data from within their Google Data Fusion pipelines. While the CData JDBC Driver enables piping Databricks data to any data source natively supported in Google Data Fusion, this article explains how to pipe data from Databricks to Google BigQuery,

About Databricks Data Integration

Accessing and integrating live data from Databricks has never been easier with CData. Customers rely on CData connectivity to:

  • Access all versions of Databricks from Runtime Versions 9.1 - 13.X to both the Pro and Classic Databricks SQL versions.
  • Leave Databricks in their preferred environment thanks to compatibility with any hosting solution.
  • Secure authenticate in a variety of ways, including personal access token, Azure Service Principal, and Azure AD.
  • Upload data to Databricks using Databricks File System, Azure Blog Storage, and AWS S3 Storage.

While many customers are using CData's solutions to migrate data from different systems into their Databricks data lakehouse, several customers use our live connectivity solutions to federate connectivity between their databases and Databricks. These customers are using SQL Server Linked Servers or Polybase to get live access to Databricks from within their existing RDBMs.

Read more about common Databricks use-cases and how CData's solutions help solve data problems in our blog: What is Databricks Used For? 6 Use Cases.


Getting Started


Upload the CData JDBC Driver for Databricks to Google Data Fusion

Upload the CData JDBC Driver for Databricks to your Google Data Fusion instance to work with live Databricks data. Due to the naming restrictions for JDBC drivers in Google Data Fusion, create a copy or rename the JAR file to match the following format driver-version.jar. For example: cdatadatabricks-2020.jar

  1. Open your Google Data Fusion instance
  2. Click the to add an entity and upload a driver 👁 Image
  3. On the "Upload driver" tab, drag or browse to the renamed JAR file.
  4. On the "Driver configuration" tab:
    • Name: Create a name for the driver (cdata.jdbc.databricks) and make note of the name
    • Class name: Set the JDBC class name: (cdata.jdbc.databricks.DatabricksDriver)
    👁 Configuring the driver (Salesforce is shown.)
  5. Click "Finish"

Connect to Databricks Data in Google Data Fusion

With the JDBC Driver uploaded, you are ready to work with live Databricks data in Google Data Fusion Pipelines.

  1. Navigate to the Pipeline Studio to create a new Pipeline
  2. From the "Source" options, click "Database" to add a source for the JDBC Driver 👁 Adding a database source
  3. Click "Properties" on the Database source to edit the properties

    NOTE: To use the JDBC Driver in Google Data Fusion, you will need a license (full or trial) and a Runtime Key (RTK). For more information on obtaining this license (or a trial), contact our sales team.

    • Set the Label
    • Set Reference Name to a value for any future references (i.e.: cdata-databricks)
    • Set Plugin Type to "jdbc"
    • Set Connection String to the JDBC URL for Databricks. For example:

      jdbc:databricks:RTK=5246...;Server=127.0.0.1;Port=443;TransportMode=HTTP;HTTPPath=MyHTTPPath;UseSSL=True;User=MyUser;Password=MyPassword;

      To connect to a Databricks cluster, set the properties as described below.

      Note: The needed values can be found in your Databricks instance by navigating to Clusters, and selecting the desired cluster, and selecting the JDBC/ODBC tab under Advanced Options.

      • Server: Set to the Server Hostname of your Databricks cluster.
      • HTTPPath: Set to the HTTP Path of your Databricks cluster.
      • Token: Set to your personal access token (this value can be obtained by navigating to the User Settings page of your Databricks instance and selecting the Access Tokens tab).

      Built-in Connection String Designer

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

       java -jar cdata.jdbc.databricks.jar

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

      👁 Using the built-in connection string designer to generate a JDBC URL (Salesforce is shown.)
    • Set Import Query to a SQL query that will extract the data you want from Databricks, i.e.:
      SELECT * FROM Customers
    👁 Configuring the database source
  4. From the "Sink" tab, click to add a destination sink (we use Google BigQuery in this example)
  5. Click "Properties" on the BigQuery sink to edit the properties
    • Set the Label
    • Set Reference Name to a value like databricks-bigquery
    • Set Project ID to a specific Google BigQuery Project ID (or leave as the default, "auto-detect")
    • Set Dataset to a specific Google BigQuery dataset
    • Set Table to the name of the table you wish to insert Databricks data into
    👁 Configuring the BigQuery sink

With the Source and Sink configured, you are ready to pipe Databricks data into Google BigQuery. Save and deploy the pipeline. When you run the pipeline, Google Data Fusion will request live data from Databricks and import it into Google BigQuery. 👁 Image

While this is a simple pipeline, you can create more complex Databricks pipelines with transforms, analytics, conditions, and more. Download a free, 30-day trial of the CData JDBC Driver for Databricks and start working with your live Databricks data in Google Data Fusion today.