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Query Amazon DynamoDB Data as a MySQL Database in Node.js

Execute MySQL queries against Amazon DynamoDB data from Node.js.

You can use the CData Cloud Hub to query Amazon DynamoDB data through a MySQL interface. Follow the procedure below to create a virtual database for Amazon DynamoDB in the Cloud Hub and start querying using Node.js.

The CData Cloud Hub provides a pure MySQL, cloud-to-cloud interface for Amazon DynamoDB, allowing you to easily query live Amazon DynamoDB data in Node.js — without replicating the data to a natively supported database. As you query data in Node.js, the CData Cloud Hub pushes all supported SQL operations (filters, JOINs, etc) directly to Amazon DynamoDB, leveraging server-side processing to quickly return Amazon DynamoDB data.

Create a Virtual MySQL Database for Amazon DynamoDB Data

CData Cloud Hub uses a straightforward, point-and-click interface to connect to data sources and generate APIs.

  1. Login to Cloud Hub and click Databases.
  2. Select "Amazon DynamoDB" from Available Data Sources.
  3. Enter the necessary authentication properties to connect to Amazon DynamoDB.

    The connection to Amazon DynamoDB is made using your AccessKey, SecretKey, and optionally your Domain and Region. Your AccessKey and SecretKey can be obtained on the security credentials page for your Amazon Web Services account. Your Region will be displayed in the upper left-hand corner when you are logged into DynamoDB.

  4. Click Test Database.
  5. Click Privileges -> Add and add the new user (or an existing user) with the appropriate permissions.

With the virtual database created, you are ready to connect to Amazon DynamoDB data from any MySQL client.

Query Amazon DynamoDB from Node.js

The following example shows how to define a connection and execute queries to Amazon DynamoDB with the MySQL module. You will need the following information:

  • Host name, or address, and port: The address of your instance of the Cloud Hub (myinstance.cdatacloud.net) and the port (3306)
  • Username and password: The username and password of a user you authorized on the Cloud Hub
  • Database name: The database you configured for Amazon DynamoDB (dynamodbdb)

Connect to Amazon DynamoDB data and start executing queries with the code below:

var mysql      = require('mysql');
var fs         = require('fs');
var connection = mysql.createConnection({
  host     : 'myinstance.cdatacloud.net',
  database : 'dynamodbdb',
  port	   : '3306',
  user     : 'admin',
  password : 'password',
  ssl      : {
    ca : fs.readFileSync('C:/certs/myCA.pem')
  }
});
connection.connect();
connection.query('SELECT * FROM Lead', function(err, rows, fields) {
  if (err) throw err;
  console.log(rows);
});

connection.end();