Query GraphQL Data as a MySQL Database in Node.js

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Execute MySQL queries against GraphQL data from Node.js.

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

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

Create a Virtual MySQL Database for GraphQL Data

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

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

    You must specify the URL of the GraphQL service. The driver supports two types of authentication:

    • Basic: Set AuthScheme to Basic. You must specify the User and Password of the GraphQL service.
    • OAuth 1.0 & 2.0: Take a look at the OAuth section in the Help documentation for detailed instructions.
  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 GraphQL data from any MySQL client.

Query GraphQL from Node.js

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

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

Connect to GraphQL 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 : 'graphqldb',
  port	   : '3306',
  user     : 'admin',
  password : 'password',
  ssl      : {
    ca : fs.readFileSync('C:/certs/myCA.pem')
  }
});
connection.connect();
connection.query('SELECT * FROM Users', function(err, rows, fields) {
  if (err) throw err;
  console.log(rows);
});

connection.end();