Add Cronjob Extension

extensions/cronjob/description.yml

@@ -0,0 +1,51 @@
+extension:
+  name: cronjob
+  description: DuckDB HTTP Cronjob Extension
+  version: 0.0.1
+  language: C++
+  build: cmake
+  license: MIT
+  maintainers:
+    - lmangani
+
+repo:
+  github: quackscience/duckdb-extension-cronjob
+  ref: 719904edf23617da02dfb599643452abf51db30e
+
+docs:
+  hello_world: |
+    -- 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)
+    │ │ │ │ │ │
+    * * * * * *
+
+
+  extended_description: |
+    This extension is experimental and potentially unstable. Do not use it in production.