추가

backend/utils/db.ts

@@ -0,0 +1,71 @@
+import pg from 'pg'
+
+const { Pool } = pg
+
+let pool: pg.Pool | null = null
+
+/**
+ * PostgreSQL 연결 풀 가져오기
+ */
+export function getPool(): pg.Pool {
+  if (!pool) {
+    const config = useRuntimeConfig()
+    
+    const poolConfig = {
+      host: config.dbHost,
+      port: parseInt(config.dbPort as string),
+      database: config.dbName,
+      user: config.dbUser,
+      password: config.dbPassword,
+      max: 10,
+      idleTimeoutMillis: 30000,
+      connectionTimeoutMillis: 2000,
+    }
+    
+    console.log(`[DB] Connecting to ${poolConfig.host}:${poolConfig.port}/${poolConfig.database}`)
+    
+    pool = new Pool(poolConfig)
+
+    pool.on('error', (err) => {
+      console.error('[DB] Unexpected pool error:', err)
+    })
+
+    console.log('[DB] PostgreSQL pool created')
+  }
+  return pool
+}
+
+/**
+ * 쿼리 실행
+ */
+export async function query<T = any>(sql: string, params?: any[]): Promise<T[]> {
+  const pool = getPool()
+  const result = await pool.query(sql, params)
+  return result.rows as T[]
+}
+
+/**
+ * 단일 행 조회
+ */
+export async function queryOne<T = any>(sql: string, params?: any[]): Promise<T | null> {
+  const rows = await query<T>(sql, params)
+  return rows[0] || null
+}
+
+/**
+ * INSERT/UPDATE/DELETE 실행
+ */
+export async function execute(sql: string, params?: any[]): Promise<number> {
+  const pool = getPool()
+  const result = await pool.query(sql, params)
+  return result.rowCount || 0
+}
+
+/**
+ * INSERT 후 반환
+ */
+export async function insertReturning<T = any>(sql: string, params?: any[]): Promise<T | null> {
+  const pool = getPool()
+  const result = await pool.query(sql, params)
+  return result.rows[0] || null
+}