tasks/online-compute/FlinkSQL/flinksql_007/gt/ground_truth.sql

-- flinksql_007: 用户行为滚动窗口统计
-- datagen 生成用户行为流 @ 50 rows/sec, Tumble 1min 窗口聚合

-- 1. 用户行为流 datagen 源表
CREATE TABLE user_source (
    userId VARCHAR,
    action VARCHAR,
    ftime AS LOCALTIMESTAMP,
    WATERMARK FOR ftime AS ftime - INTERVAL '5' SECOND
) WITH (
    'connector' = 'datagen',
    'rows-per-second' = '50',
    'fields.userId.length' = '6',
    'fields.action.length' = '8'
);

-- 2. Console 输出表
CREATE TABLE console_output (
    user_id VARCHAR,
    action_count BIGINT,
    window_start TIMESTAMP
) WITH (
    'connector' = 'print'
);

-- 3. Tumble 1min 窗口聚合: 统计每个用户每分钟的 action 次数
INSERT INTO console_output
SELECT
    userId AS user_id,
    COUNT(*) AS action_count,
    TUMBLE_START(ftime, INTERVAL '1' MINUTE) AS window_start
FROM user_source
GROUP BY TUMBLE(ftime, INTERVAL '1' MINUTE), userId;