Stream Teradata Data into Apache Kafka Topics

Apache Kafka is an open-source stream processing platform that is primarily used for building real-time data pipelines and event-driven applications. When paired with the CData JDBC Driver for Teradata, Kafka can work with live Teradata data. This article describes how to connect, access and stream Teradata data into Apache Kafka Topics and to start Confluent Control Center to help users secure, manage, and monitor the Teradata data received using Kafka infrastructure in the Confluent Platform.

With built-in optimized data processing, the CData JDBC Driver offers unmatched performance for interacting with live Teradata data. When you issue complex SQL queries to Teradata, the driver pushes supported SQL operations, like filters and aggregations, directly to Teradata 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 Teradata data using native data types.

Prerequisites

Before connecting the CData JDBC Driver for streaming Teradata data in Apache Kafka Topics, install and configure the following in the client Linux-based system.

1. Confluent Platform for Apache Kafka
2. Confluent Hub CLI Installation
3. Self-Managed Kafka JDBC Source Connector for Confluent Platform

Define a New JDBC Connection to Teradata data

1. Download CData JDBC Driver for Teradata on a Linux-based system
2. Follow the given instructions to create a new directory extract all the driver contents into it:
   1. Create a new directory named Teradata mkdir Teradata
   2. Move the downloaded driver file (.zip) into this new directory mv TeradataJDBCDriver.zip Teradata/
   3. Unzip the CData TeradataJDBCDriver contents into this new directory unzip TeradataJDBCDriver.zip
3. Open the Teradata directory and navigate to the lib folder ls cd lib/
4. Copy the contents of the lib folder of Teradata into the lib folder of Kafka Connect JDBC. Check the Kafka Connect JDBC folder contents to confirm that the cdata.jdbc.teradata.jar file is successfully copied into the lib folder cp * ../../confluent-7.5.0/share/confluent-hub-components/confluentinc-kafka-connect-jdbc/lib/ cd ../../confluent-7.5.0/share/confluent-hub-components/confluentinc-kafka-connect-jdbc/lib/
5. Install the CData Teradata JDBC driver license using the given command, followed by your Name and Email ID java -jar cdata.jdbc.teradata.jar -l
6. Enter the product key or "TRIAL" (In the scenarios of license expiry, please contact our CData Support team)
7. Start the Confluent local services using the command: confluent local services start

   This starts all the Confluent Services like Zookeeper, Kafka, Schema Registry, Kafka REST, Kafka CONNECT, ksqlDB and Control Center. You are now ready to use the CData JDBC driver for Teradata to stream messages using Kafka Connect Driver into Kafka Topics on ksqlDB.

8. Create the Kafka topics manually using a POST HTTP API Request: curl --location 'server_address:8083/connectors' --header 'Content-Type: application/json' --data '{ "name": "jdbc_source_cdata_teradata_01", "config": { "connector.class": "io.confluent.connect.jdbc.JdbcSourceConnector", "connection.url": "jdbc:teradata:User=myuser;Password=mypassword;Server=localhost;Database=mydatabase;", "topic.prefix": "teradata-01-", "mode": "bulk" } }'

   Let us understand the fields used in the HTTP POST body (shown above):

   • connector.class: Specifies the Java class of the Kafka Connect connector to be used.
   • connection.url: The JDBC connection URL to connect with Teradata data.

     Built-in Connection String Designer

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

     java -jar cdata.jdbc.teradata.jar

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

     To connect to Teradata, provide authentication information and specify the database server name.

     • User: Set this to the username of a Teradata user.
     • Password: Set this to the password of the Teradata user.
     • DataSource: Specify the Teradata server name, DBC Name, or TDPID.
     • Port: Specify the port the server is running on.
     • Database: Specify the database name. If not specified, the default database is used.

   • topic.prefix: A prefix that will be added to the Kafka topics created by the connector. It's set to "teradata-01-".
   • mode: Specifies the mode in which the connector operates. In this case, it's set to "bulk", which suggests that the connector is configured to perform bulk data transfer.

   This request adds all the tables/contents from Teradata as Kafka Topics.

   Note: The IP Address (server) to POST the request (shown above) is the Linux Network IP Address.

9. Run ksqlDB and list the topics. Use the commands: ksql list topics;
10. To view the data inside the topics, type the SQL Statement: PRINT topic FROM BEGINNING;

Connecting with the Confluent Control Center

To access the Confluent Control Center user interface, ensure to run the "confluent local services" as described in the above section and type http://<server address>:9021/clusters/ on your local browser.

Get Started Today

Download a free, 30-day trial of the CData JDBC Driver for Teradata and start streaming Teradata data into Apache Kafka. Reach out to our Support Team if you have any questions.