That is a great idea and it would be great to have others to discuss development with. I hardly know any PostgreSQL though. Do you have a github user? I can add you to the project so you can create your own branch. You are free to fork also if you'd prefer that.
I'll do what I can to help you both if you decide to give it a go. I'm also a newbie at github, so I am not sure how to best set this up. Shall we have different branches or different forks for different database targets? Ideally, the common parts (like Sisulator.js) should live apart from those such that it easily can be merged into all branches/forks, so I am guessing it would be best to sort out the structure first?
My github username is delostilos. I think creating a branch is fine.
But we have to split the platform specific parts like it is done in the modeling tool.
We need a SQL part and a scheduler part I think.
I imagine that it should be possible to use PgAgent in PostgreSQL or ŚQL Server Agent in SQL Server while having your Anchor model in SQL Server, Oracle or on a different database platform. Although it is nicer to have them on the same platform.