Connect to Parquet Data in as an External Source in Dremio

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Parquet JDBC Driver

Rapidly create and deploy powerful Java applications that integrate with Parquet.

Use the CData JDBC Driver to connect to Parquet as an External Source in Dremio.

The CData JDBC Driver for Parquet implements JDBC Standards and allows various applications, including Dremio, to work with live Parquet data. Dremio is a data lakehouse platform designed to empower self-service, interactive analytics on the data lake. With the CData JDBC Driver, you can include live Parquet data as a part of your enterprise data lake. This article describes how to connect to Parquet data from Dremio as an External Source.

The CData JDBC Driver enables high-speed access to live Parquet data in Dremio. Once you install the driver, authenticate with Parquet and gain immediate access to Parquet data within your data lake. By surfacing Parquet data using native data types and handling complex filters, aggregations, & other operations automatically, the CData JDBC Driver grants seamless access to Parquet data.

Build the ARP Connector

To use the CData JDBC Driver in Dremio, you need to build an Advanced Relation Pushdown (ARP) Connector. You can view the source code for the Connector on GitHub or download the ZIP file ( directly. Once you copy or extract the files, run the following command from the root directory of the connector (the directory containing the pom.xml file) to build the connector.

mvn clean install

Once the JAR file for the connector is built (in the target directory), you are ready to copy the ARP connector and JDBC Driver to your Dremio instance.

Installing the Connector and JDBC Driver

Install the ARP Connector to %DREMIO_HOME%/jars/ and the JDBC Driver for Parquet to %DREMIO_HOME%/jars/3rdparty. You can use commands similar to the following:

ARP Connector

docker cp PATH\TO\dremio-parquet-plugin-20.0.0.jar dremio_image_name:/opt/dremio/jars/

JDBC Driver for Parquet

docker cp PATH\TO\cdata.jdbc.parquet.jar dremio_image_name:/opt/dremio/jars/3rdparty/

Connecting to Parquet

Parquet will now appear as an External Source option in Dremio. The ARP Connector built uses a JDBC URL to connect to Parquet data. The JDBC Driver has a built-in connection string designer that you can use (see below).

Built-in Connection String Designer

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

java -jar cdata.jdbc.parquet.jar

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

Connect to your local Parquet file(s) by setting the URI connection property to the location of the Parquet file.

NOTE: To use the JDBC Driver in Dremio, 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.

Add the Runtime Key (RTK) to the JDBC URL. You will end up with a JDBC URL similar to the following:


Access Parquet as an External Source

To add Parquet as an External Source, click to add a new source and select Parquet. Copy the JDBC URL and paste it into the New Parquet Source wizard.

Save the connection and you are ready to query live Parquet data in Dremio, easily incorporating Parquet data into your data lake.

More Information & Free Trial

Using the CData JDBC Driver for Parquet in Dremio, you can incorporate live Parquet data into your data lake. Check out our Parquet connectivity page for more information about connecting to Parquet. Download a free, 30 day trial of the CData JDBC Driver for Parquet and get started today.