📝 Update pg_cron documentation with examples for calling function

[thibault-chausson]

I have read the CONTRIBUTING.md file.

YES

What kind of change does this PR introduce?

Documentation update for the pg_cron extension.

What is the current behavior?

When we use CALL to call a function, an error occurs.

jobid	runid	job_pid	database	username	command	status	return_message	start_time	end_time
1	1	731000	postgres	postgres	CALL reset_user_quotas()	failed	ERROR: reset_user_quotas() is not a procedure\nLINE 1: CALL reset_user_quotas()\n ^\nHINT: To call a function, use SELECT.\n	2024-05-08 03:30:00.15997+00	2024-05-08 03:30:00.164664+00

What is the new behavior?

jobid	runid	job_pid	database	username	command	status	return_message	start_time	end_time
1	1	731000	postgres	postgres	CALL reset_user_quotas()	failed	ERROR: reset_user_quotas() is not a procedure\nLINE 1: CALL reset_user_quotas()\n ^\nHINT: To call a function, use SELECT.\n	2024-05-08 03:30:00.15997+00	2024-05-08 03:30:00.164664+00
1	2	736555	postgres	postgres	SELECT reset_user_quotas()	succeeded	1 row	2024-05-09 03:30:00.086112+00	2024-05-09 03:30:00.092458+00

Additional context

To assist other users, I have updated the documentation to use SELECT to call a function, and CALL for a stored procedure.

Additionally, I specified that the cron.schedule() function can be used to modify a cron : pg_cron documentation.

[vercel]

@thibault-chausson is attempting to deploy a commit to the Supabase Team on Vercel.

A member of the Team first needs to authorize it.

[charislam]

Thanks @thibault-chausson!

[vercel]

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[thibault-chausson]

You're welcome @charislam!
I'm sorry I updated my branch, but I didn't think Vercel authorized a particular commit.
Sorry again!

[charislam]

No problem @thibault-chausson! For the future, it's best not to push to the branch after approval (unless of course you want to make more changes 😄), otherwise we have to reapprove the Vercel checks.

But it's a very minor problem, so don't worry about it! We appreciate your help!

[thibault-chausson]

Thanks for these explanations!
What is "zone-www-dot-com" ?

[charislam]

Ahh, that's the main supabase.com website. That failure looks like a fluke, I just reran the check and hopefully this will merge 🤞🏼