Query, Visualize, and Share live Impala Data in Redash

Redash is a collaboration tool that lets you query, visualize, and share your data. When paired with CData Connect Cloud, Redash gets access to live Impala data. This article demonstrates how to connect to Impala using Connect Cloud and work with live Impala data in Redash.

CData Connect Cloud provides a pure SQL Server interface for Impala, allowing you to query data from Impala without replicating the data to a natively supported database. Using optimized data processing out of the box, CData Connect Cloud pushes all supported SQL operations (filters, JOINs, etc.) directly to Impala, leveraging server-side processing to return the requested Impala data quickly.

Configure Impala Connectivity for Redash

Connectivity to Impala from Redash is made possible through CData Connect Cloud. To work with Impala data in Redash, we start by creating and configuring a Impala connection.

1. Log into Connect Cloud, click Sources, and then click Add Connection

2. Select "Impala" from the Add Connection panel

3. Enter the necessary authentication properties to connect to Impala.

   In order to connect to Apache Impala, set the Server, Port, and ProtocolVersion. You may optionally specify a default Database. To connect using alternative methods, such as NOSASL, LDAP, or Kerberos, refer to the online Help documentation.

   
4. Click Create & Test
5. Navigate to the Permissions tab in the Add Impala Connection page and update the User-based permissions.

Add a Personal Access Token

When connecting to Connect Cloud through the REST API, the OData API, or the Virtual SQL Server, a Personal Access Token (PAT) is used to authenticate the connection to Connect Cloud. It is best practice to create a separate PAT for each service to maintain granularity of access.

1. Click on the Gear icon () at the top right of the Connect Cloud app to open the settings page.
2. On the Settings page, go to the Access Tokens section and click Create PAT.
3. Give the PAT a name and click Create.
4. The personal access token is only visible at creation, so be sure to copy it and store it securely for future use.

With the connection configured and a PAT generated, you are ready to connect to Impala data from Redash.

Connect to Impala from Redash using Connect Cloud

To establish a connection from Redash to CData Connect Cloud using the Virtual SQL Server, follow these steps:

1. Log into Redash.
2. Click the settings widget on the top right.
3. Click New Data Source.
4. Select Microsoft SQL Server as the Data Source Type.
5. On the configuration tab, set the following properties:
   • Database Name: enter the Connection Name of the CData Connect Cloud data source you want to connect to (for example, Salesforce1).
   • Server: enter the virtual SQL Server host name (tds.cdata.com)
   • User: enter your CData Connect Cloud username. This is displayed in the top-right corner of the CData Connect Cloud interface. For example, [email protected].
   • Password: enter the PAT you generated on the Settings page.
   • Port: enter 14333
   
6. Click Create.
7. Click Test Connection to ensure that the connection is configured properly.

You can now work with live Impala data in Redash.

Get CData Connect Cloud

To get live data access to 100+ SaaS, Big Data, and NoSQL sources directly from Redash, try CData Connect Cloud today!