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Connect to Teradata Data in JRuby
Create a simple JRuby app with access to live Teradata data.
JRuby is a high-performance, stable, fully threaded Java implementation of the Ruby programming language. The CData JDBC Driver for Teradata makes it easy to integrate connectivity to live Teradata data in JRuby. This article shows how to create a simple JRuby app that connects to Teradata data, executes a query, and displays the results.
Configure a JDBC Connection to Teradata Data
Before creating the app, note the installation location for the JAR file for the JDBC Driver (typically C:\Program Files\CData\CData JDBC Driver for Teradata\lib).
JRuby natively supports JDBC, so you can easily connect to Teradata and execute SQL queries. Initialize the JDBC connection with the getConnection function of the java.sql.DriverManager class.
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.
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.
Below is a typical JDBC connection string for Teradata:
jdbc:teradata:User=myuser;Password=mypassword;Server=localhost;Database=mydatabase;
Create a JRuby App with Connectivity to Teradata Data
Create a new Ruby file (for example: TeradataSelect.rb) and open it in a text editor. Copy the following code into your file:
require 'java'
require 'rubygems'
require 'C:/Program Files/CData/CData JDBC Driver for Teradata 2018/lib/cdata.jdbc.teradata.jar'
url = "jdbc:teradata:User=myuser;Password=mypassword;Server=localhost;Database=mydatabase;"
conn = java.sql.DriverManager.getConnection(url)
stmt = conn.createStatement
rs = stmt.executeQuery("SELECT ProductId, ProductName FROM NorthwindProducts")
while (rs.next) do
puts rs.getString(1) + ' ' + rs.getString(2)
end
With the file completed, you are ready to display your Teradata data with JRuby. To do so, simply run your file from the command line:
jruby -S TeradataSelect.rb
Writing SQL-92 queries to Teradata allows you to quickly and easily incorporate Teradata data into your own JRuby applications. Download a free trial today!
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Teradata JDBC Driver
Rapidly create and deploy powerful Java applications that integrate with Teradata databases.
