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URL: https://www.cdata.com/kb/tech/presto-jdbc-knime.rst

⇱ Enable the Presto JDBC Driver in KNIME

Enable the Presto JDBC Driver in KNIME

👁 Dibyendu Datta
Dibyendu Datta
Lead Technology Evangelist
Use standard data access components in KNIME to create charts and reports with Presto data.

One of the strengths of the CData JDBC Driver for Presto is its cross-platform support, enabling integration with major BI tools. Follow the procedure below to access Presto data in KNIME and to create a chart from Presto data using the report designer.

About Presto Data Integration

Accessing and integrating live data from Trino and Presto SQL engines has never been easier with CData. Customers rely on CData connectivity to:

  • Access data from Trino v345 and above (formerly PrestoSQL) and Presto v0.242 and above (formerly PrestoDB)
  • Read and write access all of the data underlying your Trino or Presto instances
  • Optimized query generation for maximum throughput.

Presto and Trino allow users to access a variety of underlying data sources through a single endpoint. When paired with CData connectivity, users get pure, SQL-92 access to their instances, allowing them to integrate business data with a data warehouse or easily access live data directly from their preferred tools, like Power BI and Tableau.

In many cases, CData's live connectivity surpasses the native import functionality available in tools. One customer was unable to effectively use Power BI due to the size of the datasets needed for reporting. When the company implemented the CData Power BI Connector for Presto they were able to generate reports in real-time using the DirectQuery connection mode.


Getting Started


Define a New JDBC Connection to Presto Data

  1. Go to File -> Preferences -> KNIME -> Databases
  2. Click Add File and add the cdata.jdbc.presto.jar. The driver JAR file is located in the lib subfolder of the installation directory. 👁 CData drivers added to a KNIME workflow.
  3. Click Find driver classes
  4. Set the ID and the Name of the connection (you can set any values you prefer for these fields as they are not restricted)
  5. Set the URL template. A typical JDBC URL is provided below: 
    	 jdbc:presto:Server=127.0.0.1;Port=8080;

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

    	java -jar cdata.jdbc.presto.jar
    👁 Connection properties added to CData driver

    Additionally, please refer to our documentation to learn more about Connection Properties

  6. Click OK to close the configuration section. 👁 Registering new database CData drivers in KNIME workflow.
  7. Under Node Repository go to DB -> Connection -> drag and drop DB Connector. Double-click on it and change the driver name to the driver you just configured, in this case, Presto (ID: Presto). The Database URL should change automatically. 👁 Configuring the CData driver
  8. Click Apply and OK to save changes. 👁 Authentication
  9. Right-click on the connector and select Execute. You will see that the connector will allow you to redirect to the browser where you will need to log in and allow access. After that, you will get connected successfully. 👁 Executing the DB Connector

    10. Now you can go to the Read/Write section in Node Repository and get a DB Query Reader, to be able to execute a query. 👁 DB Query Reader

  10. Double-click on your DB Query Reader and click the refresh button to load the metadata. Create an SQL Statement and click Evaluate. After clicking Evaluate you will be able to see the records requested. To learn more about the tables/views that are listed in our driver please refer to our Data Model. 👁 DB Query Reader to load the metadata

Get Started Today

Download a free, 30-day trial of the CData JDBC Driver for Presto and start building Presto-connected charts and reports with KNIME. Reach out to our Support Team if you have any questions.