112 lines
3.9 KiB
SQL
112 lines
3.9 KiB
SQL
-- 学生健康数据展示用的简化传感器数据表
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-- 为了简化演示，我们创建一个统一的传感器数据表
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-- 创建简化的传感器数据表
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CREATE TABLE IF NOT EXISTS public.ss_sensor_data (
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id UUID PRIMARY KEY DEFAULT uuid_generate_v4(),
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user_id UUID NOT NULL REFERENCES public.ak_users(id) ON DELETE CASCADE,
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sensor_type TEXT NOT NULL, -- 'temperature', 'heart_rate', 'oxygen_level', 'steps'
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value NUMERIC NOT NULL,
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unit TEXT, -- '°C', 'bpm', '%', 'steps'
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recorded_at TIMESTAMPTZ NOT NULL DEFAULT now(),
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created_at TIMESTAMPTZ NOT NULL DEFAULT now()
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);
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-- 创建索引以提高查询性能
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CREATE INDEX IF NOT EXISTS idx_ss_sensor_data_user_type_time
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ON public.ss_sensor_data(user_id, sensor_type, recorded_at DESC);
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CREATE INDEX IF NOT EXISTS idx_ss_sensor_data_type_time
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ON public.ss_sensor_data(sensor_type, recorded_at DESC);
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-- 插入示例数据（为演示用）
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-- 假设有一个学生用户ID
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DO $$
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DECLARE
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demo_user_id UUID;
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current_time TIMESTAMPTZ;
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BEGIN
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-- 查找第一个学生用户ID
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SELECT id INTO demo_user_id
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FROM public.ak_users
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WHERE role = 'student'
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LIMIT 1;
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-- 如果找到学生用户，插入示例数据
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IF demo_user_id IS NOT NULL THEN
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current_time := NOW();
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-- 插入体温数据（最近7天，每小时一条）
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INSERT INTO public.ss_sensor_data (user_id, sensor_type, value, unit, recorded_at)
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SELECT
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demo_user_id,
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'temperature',
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36.0 + (random() * 1.5), -- 36.0-37.5°C
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'°C',
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current_time - (interval '1 hour' * generate_series(0, 167))
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FROM generate_series(0, 167) AS gs;
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-- 插入心率数据（最近7天，每30分钟一条）
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INSERT INTO public.ss_sensor_data (user_id, sensor_type, value, unit, recorded_at)
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SELECT
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demo_user_id,
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'heart_rate',
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60 + (random() * 40), -- 60-100 bpm
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'bpm',
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current_time - (interval '30 minutes' * generate_series(0, 335))
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FROM generate_series(0, 335) AS gs;
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-- 插入血氧数据（最近7天，每2小时一条）
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INSERT INTO public.ss_sensor_data (user_id, sensor_type, value, unit, recorded_at)
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SELECT
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demo_user_id,
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'oxygen_level',
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95 + (random() * 5), -- 95-100%
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'%',
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current_time - (interval '2 hours' * generate_series(0, 83))
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FROM generate_series(0, 83) AS gs;
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-- 插入步数数据（最近7天，每天一条）
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INSERT INTO public.ss_sensor_data (user_id, sensor_type, value, unit, recorded_at)
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SELECT
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demo_user_id,
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'steps',
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5000 + (random() * 10000), -- 5000-15000 steps
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'steps',
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current_time - (interval '1 day' * generate_series(0, 6))
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FROM generate_series(0, 6) AS gs;
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RAISE NOTICE '成功为用户 % 插入示例传感器数据', demo_user_id;
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ELSE
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RAISE NOTICE '未找到学生用户，跳过示例数据插入';
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END IF;
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END $$;
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-- 创建视图以便查询最新的传感器数据
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CREATE OR REPLACE VIEW public.v_latest_sensor_data AS
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WITH latest_readings AS (
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SELECT
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user_id,
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sensor_type,
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value,
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unit,
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recorded_at,
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ROW_NUMBER() OVER (PARTITION BY user_id, sensor_type ORDER BY recorded_at DESC) as rn
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FROM public.ss_sensor_data
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)
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SELECT
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user_id,
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sensor_type,
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value,
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unit,
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recorded_at
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FROM latest_readings
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WHERE rn = 1;
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-- 授予权限
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GRANT SELECT ON public.ss_sensor_data TO authenticated;
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GRANT SELECT ON public.v_latest_sensor_data TO authenticated;
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COMMENT ON TABLE public.ss_sensor_data IS '简化的传感器数据表，用于存储学生的健康监测数据';
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COMMENT ON VIEW public.v_latest_sensor_data IS '获取每个用户每种传感器类型的最新数据';
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