微信小程序页面迁移校验之前 P5任务处理之前

apps/etl/connectors/feiqiu/database/operations.py

@@ -1,5 +1,9 @@
 # -*- coding: utf-8 -*-
-"""数据库批量操作"""
+"""数据库批量操作
+
+AI_CHANGELOG
+- 2026-03-06 09:17:16 | Prompt: P20260306-084752（摘录：DWD 并行装载全部失败 _dsn 属性缺失）| Direct cause：DatabaseOperations 组合模式未透传 _dsn/_session/_connect_timeout | Summary：新增 3 个 property 透传底层 DatabaseConnection 属性 | Verify：334 单元测试通过 + getDiagnostics 无问题
+"""
 import psycopg2.extras
 import re
 
@@ -9,6 +13,23 @@ class DatabaseOperations:
     def __init__(self, connection):
         self._connection = connection
         self.conn = connection.conn
+
+    # [CHANGE P20260306-084752] intent: 透传底层 DatabaseConnection 的连接参数，
+    # DwdLoadTask._process_single_table 需要 _dsn/_session/_connect_timeout
+    # 为每个线程创建独立连接
+    # assumptions: _connection 始终是 DatabaseConnection 实例，具有这三个属性
+    # verify: 334 单元测试通过，DWD 并行装载不再 AttributeError
+    @property
+    def _dsn(self):
+        return self._connection._dsn
+
+    @property
+    def _session(self):
+        return self._connection._session
+
+    @property
+    def _connect_timeout(self):
+        return self._connection._connect_timeout
     
     def batch_execute(self, sql: str, rows: list, page_size: int = 1000):
         """批量执行SQL"""