tasks/online-compute/FlinkSQL/flinksql_010/gt/ground_truth.sql

-- flinksql_010: 滑动窗口(HOP)店铺统计
-- datagen 生成订单流 @ 5000 rows/sec, HOP 1min slide 5min window

-- 1. 订单流 datagen 源表
CREATE TABLE order_source (
    order_id BIGINT,
    shop_id INT,
    amount DOUBLE,
    event_time AS LOCALTIMESTAMP,
    WATERMARK FOR event_time AS event_time - INTERVAL '10' SECOND
) WITH (
    'connector' = 'datagen',
    'rows-per-second' = '5000',
    'fields.order_id.kind' = 'random',
    'fields.order_id.min' = '1',
    'fields.order_id.max' = '1000000',
    'fields.shop_id.kind' = 'random',
    'fields.shop_id.min' = '1',
    'fields.shop_id.max' = '100',
    'fields.amount.kind' = 'random',
    'fields.amount.min' = '0',
    'fields.amount.max' = '1000'
);

-- 2. Console 输出表
CREATE TABLE console_output (
    window_start TIMESTAMP,
    window_end TIMESTAMP,
    shop_id INT,
    total_amount DOUBLE,
    order_cnt BIGINT,
    avg_amount DOUBLE
) WITH (
    'connector' = 'print'
);

-- 3. HOP 滑动窗口聚合: 按店铺统计订单总额、数量和平均金额
INSERT INTO console_output
SELECT
    HOP_START(event_time, INTERVAL '1' MINUTE, INTERVAL '5' MINUTE) AS window_start,
    HOP_END(event_time, INTERVAL '1' MINUTE, INTERVAL '5' MINUTE) AS window_end,
    shop_id,
    SUM(amount) AS total_amount,
    COUNT(*) AS order_cnt,
    AVG(amount) AS avg_amount
FROM order_source
GROUP BY HOP(event_time, INTERVAL '1' MINUTE, INTERVAL '5' MINUTE), shop_id;