Connect to SFTP Data in the Denodo Platform

Denodo Platform is a data virtualization product providing a single point of contact for enterprise database data. When paired with the CData JDBC Driver for SFTP, Denodo users can work with live SFTP data alongside other enterprise data sources. This article walks through creating a virtual data source for SFTP in the Denodo Virtual DataPort Administrator.

With built-in optimized data processing, the CData JDBC Driver offers unmatched performance for interacting with live SFTP data. When you issue complex SQL queries to SFTP, the driver pushes supported SQL operations, like filters and aggregations, directly to SFTP and utilizes the embedded SQL engine to process unsupported operations client-side (often SQL functions and JOIN operations). Its built-in dynamic metadata querying allows you to work with and analyze SFTP data using native data types.

Create the SFTP Virtual Port

To connect to live SFTP data from Denodo, you need to copy the JDBC Driver JAR file to the external library directory for Denodo and create a new JDBC Data Source from the Virtual DataPort Administrator tool.

1. Download the CData JDBC Driver for SFTP installer, unzip the package, and run the JAR file to install the driver.
2. Copy the JAR File (and license file if it exists) from the installation location (typically C:\Program Files\CData\CData JDBC Driver for SFTP\lib\) to the Denodo external library directory (C:\Denodo\Denodo Platform\lib-external\jdbc-drivers\cdata-sftp-19).
3. Open the Denodo Virtual DataPort Administrator tool and navigate to the Server Explorer tab.
4. Right-click "admin" and select New -> Data source -> JDBC.
5. Configure the JDBC Connection:
   • Name: your choice, e.g.: sftp
   • Database adapter: Generic
   • Driver class path: C:\Denodo\Denodo Platform\lib-external\jdbc-drivers\cdata-sftp-19
   • Driver class: cdata.jdbc.sftp.SFTPDriver

   • Database URI: Set this to a JDBC URL using the necessary connection properties. For example,

     jdbc:sftp:RemoteHost=MyFTPServer;

     Information on creating the Database URI follows:

     Built-In Connection String Designer

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

     java -jar cdata.jdbc.sftp.jar

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

     SFTP can be used to transfer files to and from SFTP servers using the SFTP Protocol. To connect, specify the RemoteHost;. service uses the User and Password and public key authentication (SSHClientCert). Choose an SSHAuthMode and specify connection values based on your selection.

     Set the following connection properties to control the relational view of the file system:

     • RemotePath: Set this to the current working directory.
     • TableDepth: Set this to control the depth of subfolders to report as views.
     • FileRetrievalDepth: Set this to retrieve files recursively and list them in the Root table.
     Stored Procedures are available to download files, upload files, and send protocol commands. See gdatamodel for more on using SQL to interact with the server.

6. Click the "Test connection" button to confirm the configuration and click Save.

View SFTP Data in the VirtualPort Administrator Tool

After creating the data source, you can create a base view of SFTP data for use in the Denodo Platform.

1. Click the "Create base view" button in the newly created VirtualPort (admin.SFTP).
2. Expand the object tree and select the objects (tables) you wish to import.
3. Click the "Create selected" button to create views of the SFTP data.
   Optional: Click "Create associations from foreign keys" to define relationships between the objects.
4. With the view(s) created, navigate to a table (cdata_sftp_mydirectory) in the Server Explorer and double-click the selected table.
5. In the new tab, click "Execution panel" to open a query panel.
6. Customize the query in the "Execute" tab or use the default:

   SELECT * FROM cdata_sftp_mydirectory CONTEXT ('i18n'='us_est', 'cache_wait_for_load'='true')
   

7. Click Execute to view the data.

With the base view created, you can now work with live SFTP data like you would any other data source in Denodo Platform, for example, querying SFTP in the Denodo Data Catalog.

Download a free, 30-day trial of the CData JDBC Driver for SFTP and start working with your live SFTP data in Denodo Platform. Reach out to our Support Team if you have any questions.