Build a PostgreSQL Interface for Talkdesk Data using the CData JDBC Driver

There are a vast number of PostgreSQL clients available on the Internet. From standard Drivers to BI and Analytics tools, PostgreSQL is a popular interface for data access. Using our JDBC Drivers, you can now create PostgreSQL entry-points that you can connect to from any standard client.

To access Talkdesk data as a PostgreSQL database, use the CData JDBC Driver for Talkdesk and a JDBC foreign data wrapper (FDW). In this article, we compile the FDW, install it, and query Talkdesk data from PostgreSQL Server.

Connect to Talkdesk Data as a JDBC Data Source

To connect to Talkdesk as a JDBC data source, you will need the following:

• Driver JAR path: The JAR is located in the lib subfolder of the installation directory.

• Driver class:

  
  cdata.jdbc.talkdesk.TalkdeskDriver
  

• JDBC URL: The URL must start with "jdbc:talkdesk:" and can include any of the connection properties in name-value pairs separated with semicolons.

  Talkdesk uses the OAuth 2.0 Client Credentials grant. There is no browser-based authorization step and no callback URL.

  Set the following connection properties:

  • AccountName: The name of your Talkdesk account.
  • Region: The region where your Talkdesk instance is deployed. Supported values are US (default), EU, CA, AU, UK, and FedRamp.
  • OAuthClientId: The Client Id assigned when you registered your custom OAuth application.
  • OAuthClientSecret: The Client Secret assigned to your custom OAuth application.

  Creating a Custom OAuth Application

  1. Log in to your Talkdesk account and select OAuth Clients from the navigation menu.
  2. Click Create OAuth Client and give the client a descriptive name.
  3. Set Grant Type to Client Credentials.
  4. Click Add scopes and select the scopes for the data you want to access.
  5. Click Create and copy the Client Id and Client Secret.

  When you connect, the driver automatically requests an access token from Talkdesk, caches it, and refreshes it when it expires. Make sure the scopes selected for the application match the views you plan to query, or the token request can fail.

  Built-in Connection String Designer

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

  
  java -jar cdata.jdbc.talkdesk.jar
  

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

  

  A typical JDBC URL is below:

  
  jdbc:talkdesk:AccountName=myAccount;Region=US;OAuthClientId=myClientId;OAuthClientSecret=myClientSecret;
  

Build the JDBC Foreign Data Wrapper

The Foreign Data Wrapper can be installed as an extension to PostgreSQL, without recompiling PostgreSQL. The jdbc2_fdw extension is used as an example (downloadable here).

1. Add a symlink from the shared object for your version of the JRE to /usr/lib/libjvm.so. For example:

   
   ln -s /usr/lib/jvm/java-6-openjdk/jre/lib/amd64/server/libjvm.so /usr/lib/libjvm.so
   

2. Start the build:

   
   make install USE_PGXS=1
   

Query Talkdesk Data as a PostgreSQL Database

After you have installed the extension, follow the steps below to start executing queries to Talkdesk data:

1. Log into your database.
2. Load the extension for the database:

   
   CREATE EXTENSION jdbc2_fdw;
   

3. Create a server object for Talkdesk:

   
   CREATE SERVER Talkdesk 
   FOREIGN DATA WRAPPER jdbc2_fdw OPTIONS (
   drivername 'cdata.jdbc.talkdesk.TalkdeskDriver',
   url 'jdbc:talkdesk:AccountName=myAccount;Region=US;OAuthClientId=myClientId;OAuthClientSecret=myClientSecret;',
   querytimeout '15',
   jarfile '/home/MyUser/CData/CData\ JDBC\ Driver\ for\ Salesforce MyDriverEdition/lib/cdata.jdbc.talkdesk.jar'); 
   

4. Create a user mapping for the username and password of a user known to the MySQL daemon.

   
   CREATE USER MAPPING for postgres SERVER Talkdesk OPTIONS (
   username 'admin', 
   password 'test');
   

5. Create a foreign table in your local database:

   
   postgres=# CREATE FOREIGN TABLE users (
   users_id text,
   users_Id text,
   users_Name numeric) 
   SERVER Talkdesk OPTIONS (
   table_name 'users');
   

postgres=# SELECT * FROM users;