65 lines
3.4 KiB
SQL
65 lines
3.4 KiB
SQL
-- =============================================================================
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-- FDW 映射配置（生产环境）— 在 zqyy_app 数据库中执行
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-- 用途：通过 postgres_fdw 将 etl_feiqiu.app schema 只读映射到 zqyy_app，
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-- 使业务后端无需直接连接 ETL 数据库即可读取汇总/维度数据。
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-- 前提：etl_feiqiu 数据库已部署 app schema 及 app_reader 角色（见 app.sql）
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-- 测试环境版本：setup_fdw_test.sql（指向 test_etl_feiqiu / test_zqyy_app）
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-- Requirements: 8.3, 8.4, 8.5
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-- =============================================================================
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-- -----------------------------------------------------------------------------
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-- 1. 安装 postgres_fdw 扩展
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-- -----------------------------------------------------------------------------
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CREATE EXTENSION IF NOT EXISTS postgres_fdw;
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-- -----------------------------------------------------------------------------
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-- 2. 创建外部服务器（指向 etl_feiqiu 数据库）
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-- 部署时按实际环境替换 host / port
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-- -----------------------------------------------------------------------------
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CREATE SERVER IF NOT EXISTS etl_feiqiu_server
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FOREIGN DATA WRAPPER postgres_fdw
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OPTIONS (host 'localhost', dbname 'etl_feiqiu', port '5432');
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-- -----------------------------------------------------------------------------
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-- 3. 创建用户映射（只读角色）
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-- app_user = zqyy_app 侧的应用连接角色
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-- app_reader = etl_feiqiu 侧的只读角色（在 app.sql 中已创建）
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-- 密码占位符 '***'，部署时替换为真实凭据
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-- -----------------------------------------------------------------------------
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CREATE USER MAPPING IF NOT EXISTS FOR app_user
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SERVER etl_feiqiu_server
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OPTIONS (user 'app_reader', password '***');
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-- -----------------------------------------------------------------------------
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-- 4. 创建目标 schema（存放外部表）
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-- -----------------------------------------------------------------------------
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CREATE SCHEMA IF NOT EXISTS fdw_etl;
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-- -----------------------------------------------------------------------------
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-- 5. 导入 etl_feiqiu.app schema 的所有外部表到 fdw_etl
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-- 映射为只读，zqyy_app 不存储 ETL 数据副本（Requirements 8.4）
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-- -----------------------------------------------------------------------------
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IMPORT FOREIGN SCHEMA app
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FROM SERVER etl_feiqiu_server
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INTO fdw_etl;
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-- -----------------------------------------------------------------------------
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-- 6. 授权：允许 app_user 访问 fdw_etl schema 及其外部表
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-- -----------------------------------------------------------------------------
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GRANT USAGE ON SCHEMA fdw_etl TO app_user;
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GRANT SELECT ON ALL TABLES IN SCHEMA fdw_etl TO app_user;
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-- 未来新导入的外部表自动授权
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ALTER DEFAULT PRIVILEGES IN SCHEMA fdw_etl GRANT SELECT ON TABLES TO app_user;
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-- =============================================================================
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-- 回滚脚本（按逆序执行）
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-- =============================================================================
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-- ALTER DEFAULT PRIVILEGES IN SCHEMA fdw_etl REVOKE SELECT ON TABLES FROM app_user;
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-- REVOKE SELECT ON ALL TABLES IN SCHEMA fdw_etl FROM app_user;
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-- REVOKE USAGE ON SCHEMA fdw_etl FROM app_user;
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-- DROP SCHEMA IF EXISTS fdw_etl CASCADE;
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-- DROP USER MAPPING IF EXISTS FOR app_user SERVER etl_feiqiu_server;
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-- DROP SERVER IF EXISTS etl_feiqiu_server CASCADE;
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-- DROP EXTENSION IF EXISTS postgres_fdw; |