Best way to migrate old database to new database (e.g.: MariaDB to PostgreSQL)

So, you have an old website with an old database.

Then, you re-create the website in Wappler, with some slight changes in the database schema.

What tools exist to aid the migration of such data?

I’m thinking of something where I can draw arrows pointing “old.column_A” goes to “new.column_B”

It’s in fact a migration from MariaDB to PostgreSQL as well