INSTALL cronjob FROM community;
LOAD cronjob;

-- Every 15 seconds during hours 1-4
SELECT cron('SELECT now()', '*/15 * 1-4 * * *');

-- Every 2 hours (at minute 0, second 0) during hours 1-4
SELECT cron('SELECT version()', '0 0 */2 1-4 * *');

-- Every 5 minute (wipe old data)
SELECT cron('DELETE FROM somewhere WHERE ts < NOW() - INTERVAL ''1 hour''', '* /5 * * * *');

-- Inspect running Jobs
SELECT * FROM cron_jobs();

┌─────────┬──────────────────┬────────────────┬──────────────────────────┬─────────┬──────────────────────────┬─────────────┐
│ job_id  │      query       │    schedule    │         next_run         │ status  │         last_run         │ last_result │
│ varchar │     varchar      │    varchar     │         varchar          │ varchar │         varchar          │   varchar   │
├─────────┼──────────────────┼────────────────┼──────────────────────────┼─────────┼──────────────────────────┼─────────────┤
│ task_0  │ SELECT version() │ */15 * * * * * │ Fri Nov 15 20:44:30 2024 │ Active  │ Fri Nov 15 20:44:15 2024 │ Success     │
└─────────┴──────────────────┴────────────────┴──────────────────────────┴─────────┴──────────────────────────┴─────────────┘

-- Inspect running Jobs
SELECT cron_delete('task_0');

-- Supported Patterns
┌───────────── second (0 - 59)
│ ┌───────────── minute (0 - 59)
│ │ ┌───────────── hour (0 - 23)
│ │ │ ┌───────────── day of month (1 - 31)
│ │ │ │ ┌───────────── month (1 - 12)
│ │ │ │ │ ┌───────────── day of week (0 - 6) (Sunday to Saturday)
│ │ │ │ │ │
* * * * * *