数据分析ui补充完善，接入数据库

pages/mall/analytics/test/06_ml_analytics_rpcs_coupon.sql

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+-- =====================================================================================
+-- 数据分析模块（正式RPC，主库 ml_* 口径）
+-- 文件: 06_ml_analytics_rpcs_coupon.sql
+-- 主题: 优惠券效果分析 (概览/类型/渠道/趋势/转化)
+-- 依赖: public.ml_coupon_templates, public.ml_user_coupons, public.ml_orders
+-- =====================================================================================
+
+-- 1) 优惠券分析核心 KPI
+CREATE OR REPLACE FUNCTION public.rpc_analytics_coupon_overview(
+  p_start_date DATE,
+  p_end_date DATE
+)
+RETURNS TABLE (
+  total_issued BIGINT,
+  issued_growth FLOAT,
+  total_used BIGINT,
+  usage_rate FLOAT,
+  gmv_increase NUMERIC,
+  gmv_growth FLOAT,
+  roi FLOAT
+)
+LANGUAGE plpgsql
+AS $$
+DECLARE
+    prev_start_date DATE;
+    prev_end_date DATE;
+    period_days INT;
+BEGIN
+    period_days := p_end_date - p_start_date + 1;
+    prev_start_date := p_start_date - period_days;
+    prev_end_date := p_start_date - 1;
+
+    RETURN QUERY
+    WITH
+    cur AS (
+        SELECT
+            COUNT(uc.id) AS total_issued,
+            COUNT(CASE WHEN uc.status = 2 THEN uc.id END) AS total_used,
+            COALESCE(SUM(o.total_amount), 0) AS gmv_increase
+        FROM public.ml_user_coupons uc
+        LEFT JOIN public.ml_orders o ON uc.order_id = o.id
+        WHERE uc.received_at::date BETWEEN p_start_date AND p_end_date
+    ),
+    prev AS (
+        SELECT
+            COUNT(uc.id) AS total_issued,
+            COALESCE(SUM(o.total_amount), 0) AS gmv_increase
+        FROM public.ml_user_coupons uc
+        LEFT JOIN public.ml_orders o ON uc.order_id = o.id
+        WHERE uc.received_at::date BETWEEN prev_start_date AND prev_end_date
+    )
+    SELECT
+        c.total_issued,
+        ROUND(((c.total_issued - p.total_issued) * 100.0 / NULLIF(p.total_issued, 0))::numeric, 2)::FLOAT AS issued_growth,
+        c.total_used,
+        ROUND((c.total_used * 100.0 / NULLIF(c.total_issued, 0))::numeric, 2)::FLOAT AS usage_rate,
+        c.gmv_increase,
+        ROUND(((c.gmv_increase - p.gmv_increase) * 100.0 / NULLIF(p.gmv_increase, 0))::numeric, 2)::FLOAT AS gmv_growth,
+        -- ROI 简化为 GMV提升 / 优惠券总面值，这里缺少面值，暂时返回0
+        0.0::FLOAT AS roi
+    FROM cur c, prev p;
+END;
+$$;
+
+
+-- 2) 按优惠券类型分析
+CREATE OR REPLACE FUNCTION public.rpc_analytics_coupon_by_type(
+  p_start_date DATE,
+  p_end_date DATE
+)
+RETURNS TABLE (
+  coupon_type INT,
+  total_issued BIGINT,
+  total_used BIGINT,
+  usage_rate FLOAT
+)
+LANGUAGE sql
+AS $$
+  SELECT
+    t.coupon_type,
+    COUNT(uc.id)::BIGINT AS total_issued,
+    COUNT(CASE WHEN uc.status = 2 THEN uc.id END)::BIGINT AS total_used,
+    ROUND((COUNT(CASE WHEN uc.status = 2 THEN uc.id END) * 100.0 / COUNT(uc.id))::numeric, 2)::FLOAT AS usage_rate
+  FROM public.ml_user_coupons uc
+  JOIN public.ml_coupon_templates t ON uc.template_id = t.id
+  WHERE uc.received_at::date BETWEEN p_start_date AND p_end_date
+  GROUP BY t.coupon_type;
+$$;
+
+
+-- 3) 按发放渠道分析
+-- 注意: ml_user_coupons 表缺少 'source' 或 'channel' 字段，这里返回模拟数据
+CREATE OR REPLACE FUNCTION public.rpc_analytics_coupon_by_channel(
+  p_start_date DATE,
+  p_end_date DATE
+)
+RETURNS TABLE (
+  channel TEXT,
+  total_issued BIGINT,
+  total_used BIGINT
+)
+LANGUAGE sql
+AS $$
+  SELECT * FROM (VALUES
+    ('manual', 150, 60),
+    ('auto', 300, 120),
+    ('campaign', 500, 250),
+    ('invite', 80, 40),
+    ('cs', 20, 15),
+    ('points', 120, 50)
+  ) AS t(channel, total_issued, total_used);
+$$;
+
+
+-- 4) 优惠券使用趋势 (按天)
+CREATE OR REPLACE FUNCTION public.rpc_analytics_coupon_trend(
+  p_start_date DATE,
+  p_end_date DATE
+)
+RETURNS TABLE (
+  day TEXT,
+  issued BIGINT,
+  used BIGINT
+)
+LANGUAGE sql
+AS $$
+  WITH date_series AS (
+    SELECT generate_series(p_start_date, p_end_date, '1 day'::interval)::date AS d
+  )
+  SELECT
+    to_char(ds.d, 'YYYY-MM-DD') AS day,
+    (SELECT COUNT(id) FROM public.ml_user_coupons WHERE received_at::date = ds.d) AS issued,
+    (SELECT COUNT(id) FROM public.ml_user_coupons WHERE used_at::date = ds.d) AS used
+  FROM date_series ds
+  ORDER BY ds.d;
+$$;
+
+
+-- 5) 优惠券转化效果对比
+CREATE OR REPLACE FUNCTION public.rpc_analytics_coupon_conversion(
+  p_start_date DATE,
+  p_end_date DATE
+)
+RETURNS TABLE (
+  metric TEXT,
+  with_coupon NUMERIC,
+  without_coupon NUMERIC
+)
+LANGUAGE sql
+AS $$
+  WITH orders_with_coupon AS (
+    SELECT
+      SUM(o.total_amount) AS gmv,
+      COUNT(o.id) AS orders
+    FROM public.ml_orders o
+    WHERE o.created_at::date BETWEEN p_start_date AND p_end_date
+      AND o.payment_status = 2
+      AND o.discount_amount > 0 -- 简化判断：有优惠金额即认为用了券
+  ),
+  orders_without_coupon AS (
+    SELECT
+      SUM(o.total_amount) AS gmv,
+      COUNT(o.id) AS orders
+    FROM public.ml_orders o
+    WHERE o.created_at::date BETWEEN p_start_date AND p_end_date
+      AND o.payment_status = 2
+      AND o.discount_amount = 0
+  )
+  SELECT
+    'GMV' AS metric,
+    (SELECT gmv FROM orders_with_coupon) AS with_coupon,
+    (SELECT gmv FROM orders_without_coupon) AS without_coupon
+  UNION ALL
+  SELECT
+    'orders' AS metric,
+    (SELECT orders FROM orders_with_coupon) AS with_coupon,
+    (SELECT orders FROM orders_without_coupon) AS without_coupon
+  UNION ALL
+  SELECT
+    'avg_order_amount' AS metric,
+    (SELECT gmv / NULLIF(orders, 0) FROM orders_with_coupon) AS with_coupon,
+    (SELECT gmv / NULLIF(orders, 0) FROM orders_without_coupon) AS without_coupon;
+$$;