diff --git a/app/api/routers/rbac_admin.py b/app/api/routers/rbac_admin.py
index 5454264..52ebd32 100644
--- a/app/api/routers/rbac_admin.py
+++ b/app/api/routers/rbac_admin.py
@@ -240,22 +240,12 @@ async def delete_user(
         "market_purchase_orders", "market_purchases",
     ]
 
-    # 获取数据库中所有表的列信息，避免对没有 user_id 的表执行删除
-    from sqlalchemy import inspect as sa_inspect
-
-    def _get_tables_with_user_id(sync_conn):
-        insp = sa_inspect(sync_conn)
-        result = set()
-        for tname in cascade_tables:
-            try:
-                cols = [c["name"] for c in insp.get_columns(tname)]
-                if "user_id" in cols:
-                    result.add(tname)
-            except Exception:
-                pass
-        return result
-
-    tables_with_user_id = await db.session.run_sync(_get_tables_with_user_id)
+    # 直接查 information_schema 获取有 user_id 列的表，避免对没有 user_id 的表执行删除
+    result = await db.session.execute(
+        sql_text("SELECT DISTINCT table_name FROM information_schema.columns WHERE column_name = 'user_id' AND table_schema = DATABASE()")
+    )
+    existing_user_id_tables = {row[0] for row in result.fetchall()}
+    tables_with_user_id = [t for t in cascade_tables if t in existing_user_id_tables]
 
     deleted_count = 0
     for table in tables_with_user_id: