diff --git a/backend/src/db/index copy.js b/backend/src/db/index copy.js
new file mode 100644
index 00000000..abe7077b
--- /dev/null
+++ b/backend/src/db/index copy.js	
@@ -0,0 +1,39 @@
+// FILE: backend/src/db/index.js (ESM)
+import mysql from "mysql2/promise";
+
+const {
+  DB_HOST = "mariadb",
+  DB_PORT = "3306",
+  DB_USER = "center",
+  DB_PASSWORD = "Center#2025",
+  DB_NAME = "dms",
+  DB_CONN_LIMIT = "10",
+} = process.env;
+
+const pool = mysql.createPool({
+  host: DB_HOST,
+  port: Number(DB_PORT),
+  user: DB_USER,
+  password: DB_PASSWORD,
+  database: DB_NAME,
+  connectionLimit: Number(DB_CONN_LIMIT),
+  waitForConnections: true,
+  namedPlaceholders: true,
+  dateStrings: true, // คงวันที่เป็น string
+  timezone: "Z", // ใช้ UTC
+});
+
+/**
+ * เรียก Stored Procedure แบบง่าย
+ * @param {string} procName ชื่อโปรซีเยอร์ เช่น "sp_rfa_create_with_items"
+ * @param {Array<any>} params ลำดับพารามิเตอร์
+ * @returns {Promise<any>} rows จาก CALL
+ */
+export async function callProc(procName, params = []) {
+  const placeholders = params.map(() => "?").join(",");
+  const sql = `CALL ${procName}(${placeholders})`;
+  const [rows] = await pool.query(sql, params);
+  return rows;
+}
+
+export default pool; // ใช้ sql.query(...) ได้ตามที่ routes เรียกอยู่
diff --git a/backend/src/routes/users.js b/backend/src/routes/users.js
index ee3e7e10..6cd81155 100644
--- a/backend/src/routes/users.js
+++ b/backend/src/routes/users.js
@@ -1,6 +1,6 @@
 // File: backend/src/routes/users.js
 import { Router } from "express";
-import { User, Role } from "../db/index.js";
+import { User, Role } from "../db/sequelize.js";
 import { authJwt, permGuard } from "../middleware/index.js";
 import { hashPassword } from "../utils/passwords.js";