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    Apache Superset and Preset

    You can use Superset or Preset, a cloud service for Superset, to query and visualize data.

    Supported Versions

    • Superset 1.0 and later
    • Dremio SQLAlchemy connector 3.0.0 and later

    Supported Authentication Method

    Use a personal access token (PAT) obtained from a Dremio project. To create a PAT, follow the steps in the section Creating PATs.

    Prerequisites

    If you installed Superset according to the instructions for installing from scratch, install the Dremio SQLAlchemy Connector on the system or in the VM where Apache Superset is running. Instructions are in the sqlalchemy_dremio repository in GitHub.

    Creating a Connection

    1. Follow either of these steps:

      • If you are using Superset, follow these steps:

        1. Select Data > Databases in the menu bar at the top of the screen.

        2. Click the Database button in the top-right corner of the screen.

        3. In the Connect a Database dialog, select Other from the Supported Databases field.

        4. In the Display Name field, name the new connection.

      • If you are using Preset, follow these steps:

        1. Click the + icon in the top-right corner, and select Data > Connect Database.

        2. Select Dremio from the Supported Databases field of the Connect a Database dialog.

        3. (Optional) In the Display Name field, change Dremio to any name you prefer.

    2. In the SQLALCHEMY URI field, specify a URI that in either of these formats. Use an ampersand in front of each additional parameter that you add.

      • If you want to authenticate to Dremio by using a username and password, specify a URI that is in this format:

        URI for username and password authentication 
        dremio+flight://[<username>:<password>@]host:port/<schema>?UseEncryption=value&option1=value

      • If you want to authenticate to Dremio by using a PAT, specify a URI that is in this format:

        URI for personal access token (PAT) authentication 
        dremio+flight://[<username>:<PAT>@]host:port/<schema>?UseEncryption=value&option1=value

    3. Test the connection. If the test fails, check the syntax and values in the connection URI.

    4. Click Connect.

    Primary Connection Parameters

    Name Type Description Default Value Required?
    username string The username of the Dremio account to use N/A Yes, if you are not using a PAT to authenticate
    password string The password of the Dremio account to use N/A Yes, if you are not using a PAT to authenticate
    schema string The name of the database schema to use by default when a schema is not given in a query. However, this does not prevent queries from being issued for other schemas. Such queries must explicitly include the schema. N/A No
    PAT string Specifies the personal access token (PAT) to use. Ensure that you URL-encode any PAT that you use. See Personal Access Tokens for the steps for creating a token. N/A Yes, if you are not using a username and password to authenticate

    SSL connection parameters

    Use the following parameters to configure SSL encryption and verification methods:

    Name Type Description Default Value
    UseEncryption integer Forces the client to use an SSL-encrypted connection to communicate with Dremio. Accepted values include:

    true: The client communicates with Dremio by using SSL encryption..
    false: The client does not communicate with Dremio by using SSL encryption.

    		 true
    disableCertificateVerification integer Specifies whether the driver should verify the host certificate against the trust store. Accepted values are:

    false: The driver verifies the certificate against the trust store.
    true: The driver does not verify the certificate against the trust store.

    		 false
    trustedCerts string The full path of the .pem file containing certificates trusted by a CA, for the purpose of verifying the server. If this option is not set, then the driver defaults to using the trusted CA certificates .pem file installed by the driver.

    The exact file path varies according to the operating system on which the driver is installed. The path for the Windows driver is different from the path set for the macOS driver.

    The TLS connection fails if you do not specify a value when UseEncryption is true and disableCertificateVerification is false.

    		 N/A

    Advanced Parameters

    Name Type Description Default Value Required?
    routing_queue string Specifies the queue to route queries to during a session.

    Direct Routing is used to specify the exact queue and execution cluster to run queries on for a given ODBC session. With Direct Routing, workload-management (WLM) rules are not considered; instead, queries are routed directly to the specified queue. For more information, see Workload Management.

    		 N/A
    routing_tag string When this parameter is set, the specified tag is associated with all queries executed within a session. Rules can check for the presence of a tag with the function "tag()". For more information, see Workload Management. N/A