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