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Materialize

Connect Hyperdrive to a Materialize streaming database.

This example shows you how to connect Hyperdrive to a Materialize ↗ database. Materialize is a Postgres-compatible streaming database that can automatically compute real-time results against your streaming data sources.

1. Allow Hyperdrive access

To allow Hyperdrive to connect to your database, you will need to ensure that Hyperdrive has valid user credentials and network access to your database.

Materialize Console

You will need to create a new application user and password for Hyperdrive to connect with:

  1. Log in to the Materialize Console ↗.
  2. Under the App Passwords section, select Manage app passwords.
  3. Select New app password and enter a name, for example, hyperdrive-user.
  4. Select Create Password.
  5. Copy the provided password: it will only be shown once.

To retrieve the hostname and database name of your Materialize configuration:

  1. Select Connect in the sidebar of the Materialize Console.
  2. Select External tools.
  3. Copy the Host, Port and Database settings.

With the username, app password, hostname, port and database name, you can now connect Hyperdrive to your Materialize database.

2. Create a database configuration

To configure Hyperdrive, you will need:

  • The IP address (or hostname) and port of your database.
  • The database username (for example, hyperdrive-demo) you configured in a previous step.
  • The password associated with that username.
  • The name of the database you want Hyperdrive to connect to. For example, postgres.

Hyperdrive accepts the combination of these parameters in the common connection string format used by database drivers:

postgres://USERNAME:PASSWORD@HOSTNAME_OR_IP_ADDRESS:PORT/database_name

Most database providers will provide a connection string you can directly copy-and-paste directly into Hyperdrive.

To create a Hyperdrive configuration with the Wrangler CLI, open your terminal and run the following command. Replace <NAME_OF_HYPERDRIVE_CONFIG> with a name for your Hyperdrive configuration and paste the connection string provided from your database host, or replace user, password, HOSTNAME_OR_IP_ADDRESS, port, and database_name placeholders with those specific to your database:

Terminal window
npx wrangler hyperdrive create <NAME_OF_HYPERDRIVE_CONFIG> --connection-string="postgres://user:password@HOSTNAME_OR_IP_ADDRESS:PORT/database_name"

Hyperdrive will attempt to connect to your database with the provided credentials to verify they are correct before creating a configuration. If you encounter an error when attempting to connect, refer to Hyperdrive's troubleshooting documentation to debug possible causes.

This command outputs a binding for the Wrangler configuration file:

{
  "name": "hyperdrive-example",
  "main": "src/index.ts",
  "compatibility_date": "2024-08-21",
  "compatibility_flags": [
    "nodejs_compat"
  ],
  "hyperdrive": [
    {
      "binding": "HYPERDRIVE",
      "id": "<ID OF THE CREATED HYPERDRIVE CONFIGURATION>"
    }
  ]
}

3. Use Hyperdrive from your Worker

Install the node-postgres driver:

Terminal window
npm i pg@>8.16.3

The minimum version of node-postgres required for Hyperdrive is 8.16.3.

If using TypeScript, install the types package:

Terminal window
npm i -D @types/pg

Add the required Node.js compatibility flags and Hyperdrive binding to your wrangler.jsonc file:

{
  "compatibility_flags": [
    "nodejs_compat"
  ],
  "compatibility_date": "2024-09-23",
  "hyperdrive": [
    {
      "binding": "HYPERDRIVE",
      "id": "<your-hyperdrive-id-here>"
    }
  ]
}

Create a new Client instance and pass the Hyperdrive connectionString:

// filepath: src/index.ts
import { Client } from "pg";


export default {
  async fetch(request: Request, env: Env, ctx: ExecutionContext): Promise<Response> {
    // Create a new client instance for each request.
    const client = new Client({
      connectionString: env.HYPERDRIVE.connectionString,
    });


    try {
      // Connect to the database
      await client.connect();
      console.log("Connected to PostgreSQL database");


      // Perform a simple query
      const result = await client.query("SELECT * FROM pg_tables");


      // Clean up the client after the response is returned, before the Worker is killed
      ctx.waitUntil(client.end());


      return Response.json({
        success: true,
        result: result.rows,
      });
    } catch (error: any) {
      console.error("Database error:", error.message);


      new Response('Internal error occurred', { status: 500 });
    }
  },
};

If you expect to be making multiple parallel database queries within a single Worker invocation, consider using a connection pool (pg.Pool) ↗ to allow for parallel queries. If doing so, set the max connections of the connection pool to 5 connections. This ensures that the connection pool fits within Workers' concurrent open connections limit of 6, which affect TCP connections that database drivers use.

Next steps