Query Teradata Data through ODBC in Node.js

Node.js is a JavaScript runtime environment that allows you to run JavaScript code outside of a browser. With the CData ODBC Driver for Teradata, you can access live Teradata data from Node.js apps and scripts. In this article, we walk through installing node-odbc and the required tools to create a simple Node.js app with access to live Teradata data.

With built-in optimized data processing, the CData ODBC Driver offers unmatched performance for interacting with live Teradata data in Node.js. When you issue complex SQL queries from Node.js 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).

Connecting to Teradata Data

If you have not already done so, provide values for the required connection properties in the data source name (DSN). You can use the built-in Microsoft ODBC Data Source Administrator to configure the DSN. This is also the last step of the driver installation. See the "Getting Started" chapter in the help documentation for a guide to using the Microsoft ODBC Data Source Administrator to create and configure a DSN.

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.

Building node-odbc

In order to connect to Teradata through the CData ODBC Driver, you need to build node-odbc manually (after installing the required tools).

Installing the Required Tools

The following commands install the tools required to build node-odbc (note the -g parameter, which installs the tools globally).

npm i -g windows-build-tools
npm i -g node-gyp

Building node-odbc

After installing the required tools, create a directory for the Node.js app and install odbc (which builds the binary for us to use in our Node.js script).

mkdir nodeodbc
cd nodeodbc
npm i -g node

Querying Teradata from Node.js

With the ODBC Driver installed, a DSN Configured, and node-odbc built, we are ready to query live Teradata data from a Node.js app. The sample code below connects to a specific DSN and queries the NorthwindProducts table.

myscript.js

const odbc = require('odbc');

async function queryTeradata() {
    const connection = await odbc.connect(`DSN=CData Teradata Source`);
    const data = await connection.query('SELECT ProductId, ProductName FROM NorthwindProducts');
    console.log(data);
}

queryTeradata();

Once you write the app, use node to execute the script:

node myscript.js

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