Can I use pg_cron with Azure Postgres Flexible Server for multiple databases

Installing `pg_cron` in Multiple Databases

1. Install `pg_cron` in Each Database:
- Connect to each database where you want to install `pg_cron`.
- Run the following command to install `pg_cron` in each database:

sql
     CREATE EXTENSION pg_cron;
     

2. Configure `pg_cron` in Each Database:
- Edit the `postgresql.conf` file to include `pg_cron` in the `shared_preload_libraries` parameter in each database:

sql
     shared_preload_libraries = 'pg_cron'
     

- Optionally, specify the database where `pg_cron` should run:

sql
     cron.database_name = 'pg_cron' # Use separate database for pg_cron
     

- Restart PostgreSQL in each database to apply the changes.

Scheduling Jobs in Multiple Databases

1. Schedule Jobs in Each Database:
- Use the `cron.schedule` function to schedule a job in each database. For example, to run a SQL command every minute in the `foo` database:

sql
     SELECT cron.schedule('* * * * *', 'SELECT my_function();', 'foo');
     

- Replace `my_function()` with the SQL command you want to execute.

2. Unschedule Jobs in Each Database:
- Use the `cron.unschedule` function to remove a scheduled job in each database. Replace `jobid` with the ID of the job you want to unschedule:

sql
     SELECT cron.unschedule(jobid);
     

Example Job to Update RLS Policies in Multiple Databases

1. Create a Job to Update RLS Policies in Each Database:
- Create a job to update your RLS policies in each database using the `cron.schedule` function:

sql
     SELECT cron.schedule('* * * * *', 'ALTER TABLE my_table SET (security_barrier = true)', 'foo');
     

- Replace `my_table` with the name of your table.

2. Unschedule the Job in Each Database:
- Use the `cron.unschedule` function to remove the scheduled job in each database:

sql
     SELECT cron.unschedule(jobid);
     

By following these steps, you can automate RLS updates using `pg_cron` in multiple databases and ensure that your database remains secure and up-to-date without manual intervention[1][2][3][4][5].