add

backend/futures_trade_record/sql/05_create_exchange_table.sql

@@ -0,0 +1,126 @@
+-- 切换到目标数据库
+\c postgres;
+
+DO $$
+BEGIN
+    -- 创建主表 exchange
+    IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'exchange') THEN
+        CREATE TABLE exchange ( 
+            id UUID DEFAULT gen_random_uuid_v7() PRIMARY KEY NOT NULL,
+            deleted BOOLEAN NOT NULL DEFAULT FALSE,
+            created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+            updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP
+        );
+        CREATE TRIGGER update_exchange_updated_at
+        BEFORE UPDATE ON "exchange"
+        FOR EACH ROW
+        EXECUTE FUNCTION update_data_modified_column();
+        
+        -- 主表索引：deleted+created_at 组合索引（常用于查询未删除数据并排序）
+        CREATE INDEX idx_exchange_deleted_created_at ON exchange(deleted, created_at);
+        
+        RAISE NOTICE 'created exchange table, trigger and indexes';
+    ELSE
+        RAISE NOTICE 'exchange table already exists';
+    END IF;
+
+    -- 创建子表 exchange_name 并添加外键和索引
+    IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'exchange_name') THEN
+        CREATE TABLE exchange_name ( 
+            id UUID DEFAULT gen_random_uuid_v7() PRIMARY KEY NOT NULL,
+            exchange_id UUID NOT NULL,
+            name VARCHAR(50) NOT NULL,
+            deleted BOOLEAN NOT NULL DEFAULT FALSE,
+            created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+            updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+            -- 外键约束，关联exchange主表
+            CONSTRAINT fk_exchange_name_exchange
+                FOREIGN KEY (exchange_id)
+                REFERENCES exchange(id)
+                ON DELETE CASCADE
+                ON UPDATE CASCADE
+        );
+        CREATE TRIGGER update_exchange_name_updated_at
+        BEFORE UPDATE ON "exchange_name"
+        FOR EACH ROW
+        EXECUTE FUNCTION update_data_modified_column();
+        
+        -- 子表索引：外键+deleted组合索引（关联查询时高效过滤）
+        CREATE INDEX idx_exchange_name_exchange_id_deleted ON exchange_name(exchange_id, deleted);
+        -- 名称查询索引（支持按名称搜索品种）
+        CREATE INDEX idx_exchange_name_name_deleted ON exchange_name(name, deleted);
+        
+        RAISE NOTICE 'created exchange_name table, trigger, foreign key and indexes';
+    ELSE
+        RAISE NOTICE 'exchange_name table already exists';
+    END IF;
+
+    -- 创建子表 exchange_code 并添加外键和索引
+    IF NOT EXISTS (SELECT 1 FROM information_schema.tables WHERE table_name = 'exchange_code') THEN
+        CREATE TABLE exchange_code ( 
+            id UUID DEFAULT gen_random_uuid_v7() PRIMARY KEY NOT NULL,
+            exchange_id UUID NOT NULL,
+            code VARCHAR(50) NOT NULL,
+            deleted BOOLEAN NOT NULL DEFAULT FALSE,
+            created_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+            updated_at TIMESTAMPTZ NOT NULL DEFAULT CURRENT_TIMESTAMP,
+            -- 外键约束，关联exchange主表
+            CONSTRAINT fk_exchange_code_exchange
+                FOREIGN KEY (exchange_id)
+                REFERENCES exchange(id)
+                ON DELETE CASCADE
+                ON UPDATE CASCADE
+        );
+        CREATE TRIGGER update_exchange_code_updated_at
+        BEFORE UPDATE ON "exchange_code"
+        FOR EACH ROW
+        EXECUTE FUNCTION update_data_modified_column();
+        
+        -- 子表索引：外键+deleted组合索引
+        CREATE INDEX idx_exchange_code_exchange_id_deleted ON exchange_code(exchange_id, deleted);
+        -- 代码查询索引（支持按代码搜索品种）
+        CREATE INDEX idx_exchange_code_code_deleted ON exchange_code(code, deleted);
+        
+        RAISE NOTICE 'created exchange_code table, trigger, foreign key and indexes';
+    ELSE
+        RAISE NOTICE 'exchange_code table already exists';
+    END IF;
+END $$;
+
+DO $$
+DECLARE
+    view_exists BOOLEAN;
+BEGIN
+    -- 检查视图是否已存在
+    SELECT EXISTS (
+        SELECT 1 FROM information_schema.views 
+        WHERE table_name = 'exchange_info_view'
+    ) INTO view_exists;
+
+    -- 创建/更新视图：整合交易所ID、名称、代码（仅显示未删除数据）
+    CREATE OR REPLACE VIEW exchange_info_view AS
+    SELECT
+        e.id AS exchange_id,          -- 交易所主表唯一ID
+        en.name AS name,              -- 交易所名称（来自exchange_name子表）
+        ec.code AS code               -- 交易所代码（来自exchange_code子表）
+    FROM
+        exchange e
+    -- 左连接：主表存在时，即使子表无数据也保留记录（避免数据丢失）
+    LEFT JOIN exchange_name en 
+        ON e.id = en.exchange_id 
+        AND en.deleted = FALSE  -- 子句中筛选未删除数据，关联时直接过滤更高效
+    LEFT JOIN exchange_code ec 
+        ON e.id = ec.exchange_id 
+        AND ec.deleted = FALSE  -- 子表未删除数据筛选
+    WHERE
+        e.deleted = FALSE;  -- 主表筛选未删除的交易所
+
+    IF view_exists THEN
+        RAISE NOTICE '视图 exchange_info_view 已更新';
+    ELSE
+        RAISE NOTICE '视图 exchange_info_view 已创建';
+    END IF;
+EXCEPTION
+    WHEN OTHERS THEN
+        RAISE NOTICE '处理视图时发生错误: %', SQLERRM;
+END $$;