-- flinksql_013: 累积窗口日活统计 (Cumulate UV)
-- CUMULATE(1min step, 1day max) + COUNT DISTINCT + COUNT

-- 1. 用户登录 datagen 源表
CREATE TABLE user_source (
    user_id INT,
    device_id INT,
    event_time AS LOCALTIMESTAMP,
    WATERMARK FOR event_time AS event_time - INTERVAL '5' SECOND
) WITH (
    'connector' = 'datagen',
    'rows-per-second' = '3000',
    'fields.user_id.kind' = 'random',
    'fields.user_id.min' = '1',
    'fields.user_id.max' = '100000',
    'fields.device_id.kind' = 'random',
    'fields.device_id.min' = '1',
    'fields.device_id.max' = '5'
);

-- 2. Console 输出表
CREATE TABLE console_output (
    window_start TIMESTAMP(3),
    window_end TIMESTAMP(3),
    uv BIGINT,
    login_cnt BIGINT
) WITH (
    'connector' = 'print'
);

-- 3. CUMULATE TVF 窗口聚合
INSERT INTO console_output
SELECT
    window_start,
    window_end,
    COUNT(DISTINCT user_id) AS uv,
    COUNT(*) AS login_cnt
FROM TABLE(
    CUMULATE(
        TABLE user_source,
        DESCRIPTOR(event_time),
        INTERVAL '1' MINUTE,
        INTERVAL '1' DAY
    )
)
GROUP BY window_start, window_end;