mysql2 示例

mysql2 ↗ 是适用于 Node.js 的现代 MySQL 驱动，性能更好且内置 Promise 支持。本示例演示如何将其与 Cloudflare Workers 和 Hyperdrive 配合使用。

安装 mysql2 ↗ 驱动：

npm i mysql2@>3.13.0

yarn add mysql2@>3.13.0

pnpm add mysql2@>3.13.0

bun add mysql2@>3.13.0

在 wrangler.jsonc 中添加所需的 Node.js 兼容性标志和 Hyperdrive 绑定：

在 wrangler.jsonc 中添加 Node.js 兼容性标志和 Hyperdrive 绑定（binding）：

{
	// required for database drivers to function
	"compatibility_flags": [
		"nodejs_compat"
	],
	// Set this to today's date
	"compatibility_date": "2026-08-17",
	"hyperdrive": [
		{
			"binding": "HYPERDRIVE",
			"id": "<your-hyperdrive-id-here>"
		}
	]
}

compatibility_flags = [ "nodejs_compat" ]
# Set this to today's date
compatibility_date = "2026-08-17"

[[hyperdrive]]
binding = "HYPERDRIVE"
id = "<your-hyperdrive-id-here>"

创建新的 connection 实例并传入 Hyperdrive 参数：

// mysql2 v3.13.0 or later is required
import { createConnection } from "mysql2/promise";

export default {
	async fetch(request, env, ctx): Promise<Response> {
		// Create a new connection on each request. Hyperdrive maintains the underlying
		// database connection pool, so creating a new connection is fast.
		const connection = await createConnection({
			host: env.HYPERDRIVE.host,
			user: env.HYPERDRIVE.user,
			password: env.HYPERDRIVE.password,
			database: env.HYPERDRIVE.database,
			port: env.HYPERDRIVE.port,

			// Required to enable mysql2 compatibility for Workers
			disableEval: true,
		});

		try {
			// Sample query
			const [results, fields] = await connection.query("SHOW tables;");

			// Return result rows as JSON
			return Response.json({ results, fields });
		} catch (e) {
			console.error(e);
			return Response.json(
				{ error: e instanceof Error ? e.message : e },
				{ status: 500 },
			);
		}
	},
} satisfies ExportedHandler<Env>;