新增資料庫架構

2025-07-19 02:12:37 +08:00
parent e3832acfa8
commit 924f03c3d7
45 changed files with 12858 additions and 324 deletions
--- a/scripts/02-create-indexes.sql
+++ b/scripts/02-create-indexes.sql
@@ -0,0 +1,174 @@
+-- 心願星河 - 索引和觸發器創建
+-- 執行順序：第 2 步
+-- 說明：創建性能優化索引和自動更新觸發器
+
+-- 開始事務
+BEGIN;
+
+-- 1. wishes 表格索引
+CREATE INDEX IF NOT EXISTS idx_wishes_created_at ON wishes(created_at DESC);
+CREATE INDEX IF NOT EXISTS idx_wishes_is_public ON wishes(is_public) WHERE is_public = true;
+CREATE INDEX IF NOT EXISTS idx_wishes_status ON wishes(status) WHERE status = 'active';
+CREATE INDEX IF NOT EXISTS idx_wishes_category ON wishes(category) WHERE category IS NOT NULL;
+CREATE INDEX IF NOT EXISTS idx_wishes_priority ON wishes(priority DESC);
+CREATE INDEX IF NOT EXISTS idx_wishes_user_session ON wishes(user_session);
+CREATE INDEX IF NOT EXISTS idx_wishes_email ON wishes(email) WHERE email IS NOT NULL;
+
+-- 全文搜索索引 (使用 simple 配置以支持多语言)
+CREATE INDEX IF NOT EXISTS idx_wishes_search ON wishes USING gin(
+  to_tsvector('simple', title || ' ' || current_pain || ' ' || expected_solution)
+);
+
+-- 2. wish_likes 表格索引
+CREATE INDEX IF NOT EXISTS idx_wish_likes_wish_id ON wish_likes(wish_id);
+CREATE INDEX IF NOT EXISTS idx_wish_likes_user_session ON wish_likes(user_session);
+CREATE INDEX IF NOT EXISTS idx_wish_likes_created_at ON wish_likes(created_at DESC);
+CREATE INDEX IF NOT EXISTS idx_wish_likes_ip_address ON wish_likes(ip_address);
+
+-- 3. user_settings 表格索引
+CREATE INDEX IF NOT EXISTS idx_user_settings_session ON user_settings(user_session);
+CREATE INDEX IF NOT EXISTS idx_user_settings_updated_at ON user_settings(updated_at DESC);
+
+-- 4. migration_log 表格索引
+CREATE INDEX IF NOT EXISTS idx_migration_log_user_session ON migration_log(user_session);
+CREATE INDEX IF NOT EXISTS idx_migration_log_type ON migration_log(migration_type);
+CREATE INDEX IF NOT EXISTS idx_migration_log_success ON migration_log(success);
+CREATE INDEX IF NOT EXISTS idx_migration_log_created_at ON migration_log(created_at DESC);
+
+-- 5. system_stats 表格索引
+CREATE INDEX IF NOT EXISTS idx_system_stats_date ON system_stats(stat_date DESC);
+
+-- 6. 創建更新時間觸發器函數
+CREATE OR REPLACE FUNCTION update_updated_at_column()
+RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_at = NOW();
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- 7. 為需要的表格添加更新時間觸發器
+DROP TRIGGER IF EXISTS update_wishes_updated_at ON wishes;
+CREATE TRIGGER update_wishes_updated_at 
+    BEFORE UPDATE ON wishes 
+    FOR EACH ROW 
+    EXECUTE FUNCTION update_updated_at_column();
+
+DROP TRIGGER IF EXISTS update_user_settings_updated_at ON user_settings;
+CREATE TRIGGER update_user_settings_updated_at 
+    BEFORE UPDATE ON user_settings 
+    FOR EACH ROW 
+    EXECUTE FUNCTION update_updated_at_column();
+
+-- 8. 創建統計更新觸發器函數
+CREATE OR REPLACE FUNCTION update_system_stats()
+RETURNS TRIGGER AS $$
+BEGIN
+    INSERT INTO system_stats (
+        stat_date,
+        total_wishes,
+        public_wishes,
+        private_wishes,
+        total_likes,
+        active_users
+    )
+    SELECT 
+        CURRENT_DATE,
+        COUNT(*) as total_wishes,
+        COUNT(*) FILTER (WHERE is_public = true) as public_wishes,
+        COUNT(*) FILTER (WHERE is_public = false) as private_wishes,
+        (SELECT COUNT(*) FROM wish_likes) as total_likes,
+        COUNT(DISTINCT user_session) as active_users
+    FROM wishes
+    WHERE status = 'active'
+    ON CONFLICT (stat_date) 
+    DO UPDATE SET
+        total_wishes = EXCLUDED.total_wishes,
+        public_wishes = EXCLUDED.public_wishes,
+        private_wishes = EXCLUDED.private_wishes,
+        total_likes = EXCLUDED.total_likes,
+        active_users = EXCLUDED.active_users;
+    
+    RETURN COALESCE(NEW, OLD);
+END;
+$$ LANGUAGE plpgsql;
+
+-- 9. 為 wishes 和 wish_likes 添加統計更新觸發器
+DROP TRIGGER IF EXISTS update_stats_on_wish_change ON wishes;
+CREATE TRIGGER update_stats_on_wish_change
+    AFTER INSERT OR UPDATE OR DELETE ON wishes
+    FOR EACH STATEMENT
+    EXECUTE FUNCTION update_system_stats();
+
+DROP TRIGGER IF EXISTS update_stats_on_like_change ON wish_likes;
+CREATE TRIGGER update_stats_on_like_change
+    AFTER INSERT OR DELETE ON wish_likes
+    FOR EACH STATEMENT
+    EXECUTE FUNCTION update_system_stats();
+
+-- 10. 創建圖片清理觸發器函數
+CREATE OR REPLACE FUNCTION cleanup_wish_images()
+RETURNS TRIGGER AS $$
+BEGIN
+    -- 當 wish 被刪除時，記錄需要清理的圖片
+    IF TG_OP = 'DELETE' THEN
+        INSERT INTO migration_log (
+            user_session,
+            migration_type,
+            source_data,
+            success,
+            error_message
+        ) VALUES (
+            OLD.user_session,
+            'image_cleanup',
+            OLD.images,
+            false,
+            'Images marked for cleanup'
+        );
+        RETURN OLD;
+    END IF;
+    
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+-- 11. 為 wishes 添加圖片清理觸發器
+DROP TRIGGER IF EXISTS cleanup_images_on_wish_delete ON wishes;
+CREATE TRIGGER cleanup_images_on_wish_delete
+    AFTER DELETE ON wishes
+    FOR EACH ROW
+    EXECUTE FUNCTION cleanup_wish_images();
+
+-- 提交事務
+COMMIT;
+
+-- 顯示創建結果
+DO $$
+DECLARE
+    index_count INTEGER;
+    trigger_count INTEGER;
+BEGIN
+    -- 計算索引數量
+    SELECT COUNT(*) INTO index_count
+    FROM pg_indexes 
+    WHERE schemaname = 'public' 
+    AND indexname LIKE 'idx_%';
+    
+    -- 計算觸發器數量
+    SELECT COUNT(*) INTO trigger_count
+    FROM pg_trigger 
+    WHERE tgname LIKE '%wish%' OR tgname LIKE '%update%';
+    
+    RAISE NOTICE '✅ 索引和觸發器創建完成！';
+    RAISE NOTICE '📊 創建統計：';
+    RAISE NOTICE '   - 性能索引：% 個', index_count;
+    RAISE NOTICE '   - 自動觸發器：% 個', trigger_count;
+    RAISE NOTICE '';
+    RAISE NOTICE '🚀 性能優化功能：';
+    RAISE NOTICE '   - 快速查詢索引';
+    RAISE NOTICE '   - 全文搜索支援';
+    RAISE NOTICE '   - 自動統計更新';
+    RAISE NOTICE '   - 圖片清理追蹤';
+    RAISE NOTICE '';
+    RAISE NOTICE '🔄 下一步：執行 03-create-views-functions.sql';
+END $$;