Wen Bo Xie 2ba7352cfe docs: clarify declarative pg_cron job workflow (#51596)
## Problem

The declarative schemas guide does not explain how pg-delta tracks
pg_cron jobs. Its guidance that schema diffs exclude row data can also
suggest that jobs stored in cron.job are excluded.

Readers need to know where to declare jobs, how changes become
migrations, and why jobs without unique names are skipped.

## Solution

Document the declarative workflow for pg_cron jobs, including:

- Declaring jobs in SQL files under supabase/schemas/.
- Giving each job a unique name.
- Generating migrations when job declarations change or are removed.
- The scheduling and unscheduling calls emitted by the engine.

Connect the DML caveat to the extension configuration explanation so
readers understand why supported configuration rows are tracked.

Validation: Prettier, Markdown generation, and git diff --check passed.
The cron workflow was checked against source code but was not executed
in a sandbox.

## Review instructions

1. Open the declarative database schemas guide in the docs preview.
2. Read Data manipulation language and follow the extension
configuration link.
3. In Extension-managed objects, confirm that the cron guidance explains
where to declare jobs, the naming requirement, and the generated
migration behavior.
4. Follow generate and apply a migration and confirm it leads to the
existing workflow.

## Checklist

- [x] I have read
[CONTRIBUTING.md](https://github.com/supabase/supabase/blob/master/CONTRIBUTING.md)
- [x] If I wrote a new docs topic or edited an existing topic, I used
the /write-the-docs or /edit-the-docs skill, which applies the docs
[style
guide](https://github.com/supabase/supabase/tree/master/apps/docs/style-guide)
2026-10-13 16:45:48 +02:00
2025-06-17 11:08:46 +02:00
2024-01-10 13:34:41 +01:00
2021-07-25 12:45:26 +08:00
2026-09-29 18:32:27 +03:00

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